update go.mod for release

cmd/config: support for stdin/stdout in source/sink

.golangci-kustomize.yml

@@ -7,8 +7,13 @@ linters:
     - bodyclose
     - deadcode
     - depguard
+    # - dogsled
     - dupl
+    # - errcheck
+    # - funlen
+    # - gochecknoinits
     - goconst
+    # - gocritic
     - gocyclo
     - gofmt
     - goimports
@@ -21,6 +26,7 @@ linters:
     - lll
     - misspell
     - nakedret
+    # - scopelint
     - staticcheck
     - structcheck
     # stylecheck demands that acronyms not be treated as words
@@ -28,9 +34,10 @@ linters:
     # - stylecheck
     - typecheck
     - unconvert
-    - unused
     - unparam
+    - unused
     - varcheck
+    # - whitespace
 
 linters-settings:
   dupl:

Makefile

@@ -17,6 +17,9 @@ verify-kustomize: \
 	test-examples-kustomize-against-HEAD \
 	test-examples-kustomize-against-latest
 
+.PHONY: verify-kustomize-e2e
+verify-kustomize-e2e: test-examples-e2e-kustomize
+
 # Other builds in this repo might want a different linter version.
 # Without one Makefile to rule them all, the different makes
 # cannot assume that golanci-lint is at the version they want
@@ -48,6 +51,11 @@ $(MYGOBIN)/goimports:
 	cd api; \
 	go install golang.org/x/tools/cmd/goimports
 
+# Install resource from whatever is checked out.
+$(MYGOBIN)/resource:
+	cd cmd/resource; \
+	go install .
+
 # To pin pluginator, use this recipe instead:
 #   cd api;
 #   go install sigs.k8s.io/kustomize/pluginator/v2
@@ -193,6 +201,16 @@ test-unit-kustomize-all: \
 test-examples-kustomize-against-HEAD: $(MYGOBIN)/kustomize $(MYGOBIN)/mdrip
 	./hack/testExamplesAgainstKustomize.sh HEAD
 
+.PHONY:
+test-examples-e2e-kustomize: $(MYGOBIN)/mdrip $(MYGOBIN)/kind
+	( \
+		set -e; \
+		/bin/rm -f $(MYGOBIN)/kustomize; \
+		echo "Installing kustomize from ."; \
+		cd kustomize; go install .; cd ..; \
+		./hack/testExamplesE2EAgainstKustomize.sh .; \
+	)
+
 .PHONY:
 test-examples-kustomize-against-latest: $(MYGOBIN)/mdrip
 	( \
@@ -237,6 +255,16 @@ $(MYGOBIN)/helm:
 		rm -rf $$d \
 	)
 
+$(MYGOBIN)/kind:
+	( \
+        set -e; \
+        d=$(shell mktemp -d); cd $$d; \
+        wget -O ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.7.0/kind-$(shell uname)-amd64; \
+        chmod +x ./kind; \
+        mv ./kind $(MYGOBIN); \
+        rm -rf $$d; \
+	)
+
 .PHONY: clean
 clean: kustomize-external-go-plugin-clean
 	go clean --cache

api/internal/crawl/backend/search_backend.go

@@ -44,7 +44,7 @@ type kustomizeSearch struct {
 // /register: not implemented, but meant as an endpoint for adding new
 // kustomization files to the corpus.
 func NewKustomizeSearch(ctx context.Context) (*kustomizeSearch, error) {
-	idx, err := index.NewKustomizeIndex(ctx)
+	idx, err := index.NewKustomizeIndex(ctx, "kustomize")
 	if err != nil {
 		return nil, err
 	}

api/internal/crawl/cmd/crawler/crawler.go

@@ -2,12 +2,15 @@ package main
 
 import (
 	"context"
+	"flag"
 	"fmt"
 	"log"
 	"net/http"
 	"os"
 	"time"
 
+	"sigs.k8s.io/kustomize/api/internal/crawl/utils"
+
 	"sigs.k8s.io/kustomize/api/internal/crawl/crawler"
 	"sigs.k8s.io/kustomize/api/internal/crawl/crawler/github"
 	"sigs.k8s.io/kustomize/api/internal/crawl/doc"
@@ -25,6 +28,7 @@ const (
 )
 
 type CrawlMode int
+
 const (
 	CrawlUnknown CrawlMode = iota
 	// Crawl all the kustomization files in all the repositories of a Github user
@@ -45,7 +49,7 @@ func NewCrawlMode(s string) CrawlMode {
 		return CrawlUser
 	case "github-repo":
 		return CrawlRepo
-	case "":
+	case "index+github":
 		return CrawlIndexAndGithub
 	case "index":
 		return CrawlIndex
@@ -56,30 +60,33 @@ func NewCrawlMode(s string) CrawlMode {
 	}
 }
 
-func Usage() {
-	fmt.Printf("Usage: %s [mode] [githubUser|githubRepo]\n", os.Args[0])
-	fmt.Printf("\tmode can be one of [github-user, github-repo, index, github]\n")
-	fmt.Printf("%s: crawl all the documents in the index and crawling all the kustomization files on Github\n", os.Args[0])
-	fmt.Printf("%s index: crawl all the documents in the index\n", os.Args[0])
-	fmt.Printf("%s gihub: crawl all the kustomization files on Github\n", os.Args[0])
-	fmt.Printf("%s github-user <github-user>: Crawl all the kustomization files in all the repositories of a Github user\n", os.Args[0])
-	fmt.Printf("\tFor example, %s github-user kubernetes-sigs\n", os.Args[0])
-	fmt.Printf("%s github-repo <github-repo>: Crawl all the kustomization files in a Github repo\n", os.Args[0])
-	fmt.Printf("\tFor example, %s github-repo kubernetes-sigs/kustomize\n", os.Args[0])
-}
-
 func main() {
+	indexNamePtr := flag.String(
+		"index", "kustomize", "The name of the ElasticSearch index.")
+	modePtr := flag.String("mode", "index+github",
+		`The crawling mode, which can be one of [github-user, github-repo, index, github, index+github].
+  * github-user: crawl all the kustomization files in all the repositories of a Github user (--github-user must be specified for this mode).
+  * github-repo: crawl all the kustomization files in a Github repository (--github-repo must be specified for this mode).
+  * index: crawl all the documents in the index.
+  * gihub: crawl all the kustomization files on Github.
+  * index+github: crawl all the documents in the index and crawling all the kustomization files on Github.`)
+	githubUserPtr := flag.String("github-user", "",
+		"A github user name (e.g., kubernetes-sigs). This flag is required for the `github-user` mode.")
+	githubRepoPtr := flag.String("github-repo", "",
+		"A github repository name (e.g., kubernetes-sigs/kustomize). This flag is required for the `github-repo` mode.")
+	flag.Parse()
+
 	githubToken := os.Getenv(githubAccessTokenVar)
 	if githubToken == "" {
-		fmt.Printf("Must set the variable '%s' to make github requests.\n",
+		log.Printf("Must set the variable '%s' to make github requests.\n",
 			githubAccessTokenVar)
 		return
 	}
 
 	ctx := context.Background()
-	idx, err := index.NewKustomizeIndex(ctx)
+	idx, err := index.NewKustomizeIndex(ctx, *indexNamePtr)
 	if err != nil {
-		fmt.Printf("Could not create an index: %v\n", err)
+		log.Printf("Could not create an index: %v\n", err)
 		return
 	}
 
@@ -87,7 +94,7 @@ func main() {
 	cache, err := redis.DialURL(cacheURL)
 	clientCache := &http.Client{}
 	if err != nil {
-		fmt.Printf("Error: redis could not make a connection: %v\n", err)
+		log.Printf("Error: redis could not make a connection: %v\n", err)
 	} else {
 		clientCache = httpclient.NewClient(cache)
 	}
@@ -108,10 +115,10 @@ func main() {
 		case *doc.KustomizationDocument:
 			switch mode {
 			case index.Delete:
-				fmt.Println("Deleting: ", d)
+				log.Printf("Deleting: %v", d)
 				return idx.Delete(d.ID())
 			default:
-				fmt.Println("Inserting: ", d)
+				log.Printf("Inserting: %v", d)
 				return idx.Put(d.ID(), d)
 			}
 		default:
@@ -119,20 +126,15 @@ func main() {
 		}
 	}
 
-	// seen tracks the IDs of all the documents in the index.
+	// seen tracks the IDs of all the documents in the index and their corresponding file types.
 	// This helps avoid indexing a given document multiple times.
-	seen := make(map[string]struct{})
+	seen := utils.NewSeenMap()
 
-	var mode CrawlMode
-	if len(os.Args) == 1 {
-		mode = CrawlIndexAndGithub
-	} else {
-		mode = NewCrawlMode(os.Args[1])
-	}
+	mode := NewCrawlMode(*modePtr)
 
 	ghCrawlerConstructor := func(user, repo string) crawler.Crawler {
 		if user != "" {
-			return 	github.NewCrawler(githubToken, retryCount, clientCache,
+			return github.NewCrawler(githubToken, retryCount, clientCache,
 				github.QueryWith(
 					github.Filename("kustomization.yaml"),
 					github.Filename("kustomization.yml"),
@@ -165,11 +167,11 @@ func main() {
 		it := idx.IterateQuery(query, 10000, 60*time.Second)
 		for it.Next() {
 			for _, hit := range it.Value().Hits.Hits {
-				seedDocs = append(seedDocs, hit.Document.Copy())
+				seedDocs = append(seedDocs, hit.Document.Document.Copy())
 			}
 		}
 		if err := it.Err(); err != nil {
-			fmt.Printf("Error iterating: %v\n", err)
+			log.Fatalf("getSeedDocsFunc Error iterating: %v\n", err)
 		}
 	}
 
@@ -185,23 +187,29 @@ func main() {
 		crawler.CrawlFromSeed(ctx, seedDocs, crawlers, docConverter, indexFunc, seen)
 	case CrawlGithub:
 		crawlers := []crawler.Crawler{ghCrawlerConstructor("", "")}
+		// add all the documents in the index into seen.
+		// this greatly reduces the time overhead of CrawlGithub.
+		getSeedDocsFunc()
+		for _, d := range seedDocs {
+			seen[d.ID()] = d.FileType
+		}
 		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
 	case CrawlUser:
-		if len(os.Args) < 3 {
-			Usage()
-			log.Fatalf("Please specify a github user!")
+		if *githubUserPtr == "" {
+			flag.Usage()
+			log.Fatalf("Please specify a github user with the github-user flag!")
 		}
-		crawlers := []crawler.Crawler{ghCrawlerConstructor(os.Args[2], "")}
+		crawlers := []crawler.Crawler{ghCrawlerConstructor(*githubUserPtr, "")}
 		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
 	case CrawlRepo:
-		if len(os.Args) < 3 {
-			Usage()
-			log.Fatalf("Please specify a github repo!")
+		if *githubRepoPtr == "" {
+			flag.Usage()
+			log.Fatalf("Please specify a github repository with the github-repo flag!")
 		}
-		crawlers := []crawler.Crawler{ghCrawlerConstructor("", os.Args[2])}
+		crawlers := []crawler.Crawler{ghCrawlerConstructor("", *githubRepoPtr)}
 		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
 	case CrawlUnknown:
-		Usage()
-		log.Fatalf("The crawler mode must be one of [github-user, github-repo, index, github]")
+		flag.Usage()
+		log.Fatalf("The --mode flag must be one of [github-user, github-repo, index, github, index+github].")
 	}
 }

api/internal/crawl/cmd/kustomize_stats/main.go

@@ -2,15 +2,21 @@ package main
 
 import (
 	"context"
+	"crypto/sha256"
 	"flag"
 	"fmt"
 	"log"
-	"path/filepath"
 	"sort"
 	"time"
 
+	"sigs.k8s.io/kustomize/api/internal/crawl/doc"
+
 	"sigs.k8s.io/kustomize/api/internal/crawl/index"
-	"sigs.k8s.io/kustomize/api/konfig"
+)
+
+const (
+	githubAccessTokenVar = "GITHUB_ACCESS_TOKEN"
+	retryCount           = 3
 )
 
 // iterateArr adds each item in arr into countMap.
@@ -25,29 +31,90 @@ func iterateArr(arr []string, countMap map[string]int) {
 
 }
 
-// isKustomizationFile determines whether a file path is a kustomization file
-func isKustomizationFile(path string) bool {
-	basename := filepath.Base(path)
-	for _, name := range konfig.RecognizedKustomizationFileNames() {
-		if basename == name {
-			return true
-		}
-	}
-	return false
-}
-
-// SortMapKeyByValue takes a map as its input, sorts its keys according to their values
+// SortMapKeyByValueInt takes a map as its input, sorts its keys according to their values
 // in the map, and outputs the sorted keys as a slice.
-func SortMapKeyByValue(m map[string]int) []string {
+func SortMapKeyByValueInt(m map[string]int) []string {
 	keys := make([]string, 0, len(m))
 	for key := range m {
 		keys = append(keys, key)
 	}
 	// sort keys according to their values in the map m
-	sort.Slice(keys, func(i, j int) bool {return m[keys[i]] > m[keys[j]]})
+	sort.Slice(keys, func(i, j int) bool { return m[keys[i]] > m[keys[j]] })
 	return keys
 }
 
+// SortMapKeyByValue takes a map as its input, sorts its keys according to their values
+// in the map, and outputs the sorted keys as a slice.
+func SortMapKeyByValueLen(m map[string][]string) []string {
+	keys := make([]string, 0, len(m))
+	for key := range m {
+		keys = append(keys, key)
+	}
+	// sort keys according to their values in the map m
+	sort.Slice(keys, func(i, j int) bool { return len(m[keys[i]]) > len(m[keys[j]]) })
+	return keys
+}
+
+func GeneratorOrTransformerStats(docs []*doc.KustomizationDocument) {
+	n := len(docs)
+	if n == 0 {
+		return
+	}
+
+	fileType := docs[0].FileType
+	fmt.Printf("There are totally %d %s files.\n", n, fileType)
+
+	GitRepositorySummary(docs, fileType)
+
+	// key of kindToUrls: a string in the KustomizationDocument.Kinds field
+	// value of kindToUrls: a slice of string urls defining a given kind.
+	kindToUrls := make(map[string][]string)
+
+	for _, d := range docs {
+		url := fmt.Sprintf("%s/blob/%s/%s", d.RepositoryURL, d.DefaultBranch, d.FilePath)
+		for _, kind := range d.Kinds {
+			if _, ok := kindToUrls[kind]; !ok {
+				kindToUrls[kind] = []string{url}
+			} else {
+				kindToUrls[kind] = append(kindToUrls[kind], url)
+			}
+		}
+	}
+	fmt.Printf("There are totally %d kinds of %s\n", len(kindToUrls), fileType)
+	sortedKeys := SortMapKeyByValueLen(kindToUrls)
+	for _, k := range sortedKeys {
+		sort.Strings(kindToUrls[k])
+		fmt.Printf("%s kind %s appears %d times\n", fileType, k, len(kindToUrls[k]))
+		for _, url := range kindToUrls[k] {
+			fmt.Printf("%s\n", url)
+		}
+	}
+}
+
+// GitRepositorySummary counts the distribution of docs:
+// 1) how many git repositories are these docs from?
+// 2) how many docs are from each git repository?
+func GitRepositorySummary(docs []*doc.KustomizationDocument, fileType string) {
+	m := make(map[string]int)
+	for _, d := range docs {
+		if _, ok := m[d.RepositoryURL]; ok {
+			m[d.RepositoryURL]++
+		} else {
+			m[d.RepositoryURL] = 1
+		}
+	}
+	sortedKeys := SortMapKeyByValueInt(m)
+	topN := 10
+	i := 0
+	for _, k := range sortedKeys {
+		if i >= topN {
+			break
+		}
+		fmt.Printf("%d %s are from %s\n", m[k], fileType, k)
+		i++
+	}
+}
+
 func main() {
 	topKindsPtr := flag.Int(
 		"kinds", -1,
@@ -64,10 +131,12 @@ If you only want to list the 10 most popular identifiers, set the flag to 10.`)
 		`the number of kustomize features to be listed according to their popularities.
 By default, all the features will be listed.
 If you only want to list the 10 most popular features, set the flag to 10.`)
+	indexNamePtr := flag.String(
+		"index", "kustomize", "The name of the ElasticSearch index.")
 	flag.Parse()
 
 	ctx := context.Background()
-	idx, err := index.NewKustomizeIndex(ctx)
+	idx, err := index.NewKustomizeIndex(ctx, *indexNamePtr)
 	if err != nil {
 		log.Fatalf("Could not create an index: %v\n", err)
 	}
@@ -85,35 +154,59 @@ If you only want to list the 10 most popular features, set the flag to 10.`)
 	// ids tracks the unique IDs of the documents in the index
 	ids := make(map[string]struct{})
 
+	// generatorFiles include all the non-kustomization files whose FileType is generator
+	generatorFiles := make([]*doc.KustomizationDocument, 0)
+
+	// transformersFiles include all the non-kustomization files whose FileType is transformer
+	transformersFiles := make([]*doc.KustomizationDocument, 0)
+
+	checksums := make(map[string]int)
+
 	// get all the documents in the index
 	query := []byte(`{ "query":{ "match_all":{} } }`)
 	it := idx.IterateQuery(query, 10000, 60*time.Second)
 	for it.Next() {
 		for _, hit := range it.Value().Hits.Hits {
+			sum := fmt.Sprintf("%x", sha256.Sum256([]byte(hit.Document.DocumentData)))
+			if _, ok := checksums[sum]; ok {
+				checksums[sum]++
+			} else {
+				checksums[sum] = 1
+			}
+
 			// check whether there is any duplicate IDs in the index
 			if _, ok := ids[hit.ID]; !ok {
 				ids[hit.ID] = struct{}{}
 			} else {
-				fmt.Printf("Found duplicate ID (%s)\n", hit.ID)
+				log.Printf("Found duplicate ID (%s)\n", hit.ID)
 			}
 
 			count++
 			iterateArr(hit.Document.Kinds, kindsMap)
 			iterateArr(hit.Document.Identifiers, identifiersMap)
 
-			if isKustomizationFile(hit.Document.FilePath) {
+			if doc.IsKustomizationFile(hit.Document.FilePath) {
 				kustomizationFilecount++
 				iterateArr(hit.Document.Identifiers, kustomizeIdentifiersMap)
+
+			} else {
+				switch hit.Document.FileType {
+				case "generator":
+					generatorFiles = append(generatorFiles, hit.Document.Copy())
+				case "transformer":
+					transformersFiles = append(transformersFiles, hit.Document.Copy())
+				}
 			}
 		}
 	}
+
 	if err := it.Err(); err != nil {
-		fmt.Printf("Error iterating: %v\n", err)
+		log.Fatalf("Error iterating: %v\n", err)
 	}
 
-	sortedKindsMapKeys := SortMapKeyByValue(kindsMap)
-	sortedIdentifiersMapKeys := SortMapKeyByValue(identifiersMap)
-	sortedKustomizeIdentifiersMapKeys := SortMapKeyByValue(kustomizeIdentifiersMap)
+	sortedKindsMapKeys := SortMapKeyByValueInt(kindsMap)
+	sortedIdentifiersMapKeys := SortMapKeyByValueInt(identifiersMap)
+	sortedKustomizeIdentifiersMapKeys := SortMapKeyByValueInt(kustomizeIdentifiersMap)
 
 	fmt.Printf(`The count of unique document IDs in the kustomize index: %d
 There are %d documents in the kustomize index.
@@ -147,4 +240,15 @@ There are %d documents in the kustomize index.
 			kustomizeFeatureCount++
 		}
 	}
+
+	GeneratorOrTransformerStats(generatorFiles)
+	GeneratorOrTransformerStats(transformersFiles)
+
+	fmt.Printf("There are total %d checksums of document contents\n", len(checksums))
+	sortedChecksums := SortMapKeyByValueInt(checksums)
+	sortedChecksums = sortedChecksums[:20]
+	fmt.Printf("The top 20 checksums are:\n")
+	for _, key := range sortedChecksums {
+		fmt.Printf("checksum %s apprears %d\n", key, checksums[key])
+	}
 }

api/internal/crawl/cmd/log-parser/main.go

@@ -36,6 +36,7 @@ func main() {
 
 		m := entry.(map[string]interface{})
 		if payload, ok := m["textPayload"]; ok {
+			// use fmt.Printf here instead of log.Printf to avoid the time and code location info the log package provides
 			fmt.Printf("%s", payload)
 		} else {
 			log.Printf("the log entry does not have the `textPayload` field: %s\n", line)

api/internal/crawl/config/base/kustomization.yaml

@@ -2,5 +2,4 @@ configmapGenerator:
 - name: elasticsearch-config
   literals:
   - es-url="http://esbasic-master:9200"
-  - kustomize-index-name="kustomize"
   - plugin-index-name="plugin"

api/internal/crawl/config/crawler/cronjob/cronjob.yaml

@@ -1,9 +1,10 @@
 apiVersion: batch/v1beta1
 kind: CronJob
 metadata:
-  name: crawler
+  name: crawler-cronjob
 spec:
-  schedule: "5 0 * * */1"
+  # run the cronjob at 00:00 every 7 days
+  schedule: "0 0 */7 * *"
   jobTemplate:
     spec:
       template:
@@ -11,7 +12,9 @@ spec:
           restartPolicy: OnFailure
           containers:
           - name: crawler
-            image: gcr.io/kustomize-search/crawler:latest
+            image: gcr.io/haiyanmeng-gke-dev/crawler:v1
+            command: ["/crawler"]
+            args: ["--mode=index+github", "--github-repo=kubernetes-sigs/kustomize", "--index=kustomize"]
             imagePullPolicy: Always
             env:
             - name: GITHUB_ACCESS_TOKEN

api/internal/crawl/config/crawler/job/README.md

@@ -1,4 +1,4 @@
-There are three ways of running the crawler job.
+The crawler job can run in one of the following mode:
 
 # Crawling all the documents in the index and crawling all the kustomization files on Github
 
@@ -7,14 +7,13 @@ of the container should be:
 
 ```
         command: ["/crawler"]
-        args: []
 ```
 
 Or
 
 ```
         command: ["/crawler"]
-        args: [""]
+        args: ["--mode=index+github"]
 ```
 
 # Crawling all the documents in the index
@@ -23,7 +22,7 @@ The `command` and `args` field of the container should be:
 
 ```
         command: ["/crawler"]
-        args: ["index"]
+        args: ["--mode=index"]
 ```
 
 # Crawling all the kustomization files on Github
@@ -32,7 +31,7 @@ The `command` and `args` field of the container should be:
 
 ```
         command: ["/crawler"]
-        args: ["github"]
+        args: ["--mode=github"]
 ```
 
 # Crawling all the kustomization files in a Github repo
@@ -41,7 +40,7 @@ The `command` and `args` field of the container should be like:
 
 ```
         command: ["/crawler"]
-        args: ["github-repo", "kubernetes-sigs/kustomize"]
+        args: ["--mode=github-repo", "--github-repo=kubernetes-sigs/kustomize"]
 ```
 
 # Crawling all the kustomization files in all the repositories of a Github user
@@ -50,5 +49,5 @@ The `command` and `args` field of the container should be like:
 
 ```
         command: ["/crawler"]
-        args: ["github-user", "kubernetes-sigs"]
+        args: ["--github-user", "--github-user=kubernetes-sigs"]
 ```

api/internal/crawl/config/crawler/job/job.yaml

@@ -11,7 +11,7 @@ spec:
         image: gcr.io/haiyanmeng-gke-dev/crawler:v1
         imagePullPolicy: Always
         command: ["/crawler"]
-        args: ["github-repo", "kubernetes-sigs/kustomize"]
+        args: ["--mode=github-repo", "--github-repo=kubernetes-sigs/kustomize", "--index=kustomize"]
         env:
         - name: GITHUB_ACCESS_TOKEN
           valueFrom:

api/internal/crawl/config/crawler/kustomize_stats/job.yaml

@@ -11,8 +11,13 @@ spec:
         image: gcr.io/haiyanmeng-gke-dev/kustomize_stats:v1
         imagePullPolicy: Always
         command: ["/kustomize_stats"]
-        args: ["--kinds=50", "--identifiers=50", "--kustomize-features=50"]
+        args: ["--index=kustomize", "--kinds=50", "--identifiers=50", "--kustomize-features=50"]
         env:
+        - name: GITHUB_ACCESS_TOKEN
+          valueFrom:
+            secretKeyRef:
+              name: github-access-token
+              key: token
         - name: ELASTICSEARCH_URL
           valueFrom:
             configMapKeyRef:

api/internal/crawl/config/elastic/esbackup.yaml

@@ -0,0 +1,16 @@
+# Creating `esbackup/kustomize-backbup` will create the `kustomize-backup` snapshot repository.
+# Deleting `esbackup/kustomize-backbup` will delete the `kustomize-backup` snapshot repository and all the snapshots in the repository.
+# Deleting `esbackup/kustomize-backbup` will NOT delete essnapshot and esrestore objects.
+apiVersion: elasticsearch.cloud.google.com/v1alpha1
+kind: ESBackup
+metadata:
+  name: kustomize-backup
+spec:
+  storage:
+    gcs:
+      bucket: kustomize-backup
+      path: kustomize
+      secret:
+        name: kustomizesa
+  escluster:
+    name: esbasic

api/internal/crawl/config/elastic/escluster.yaml

@@ -8,6 +8,13 @@ spec:
     - repository-gcs
     - ingest-user-agent
     - ingest-geoip
+  # To set `gcpserviceaccount`,
+  # First, create and download a GCP service account into a json file, named `sakey.json` following the instruction:
+  #     https://www.elastic.co/guide/en/elasticsearch/plugins/6.5/repository-gcs-usage.html#repository-gcs-using-service-account
+  # Second, create a secret for the service account using the following command:
+  #     $ kubectl create secret generic kustomizesa --from-file=./sakey.json
+  gcpserviceaccount:
+    name: kustomizesa
   config:
     env:
       example: test

api/internal/crawl/config/elastic/esrestore.yaml

@@ -0,0 +1,16 @@
+# Creating `esrestore/kustomize-restore` will restore the `kuostmize` index in the `kustomize-snapshot` snapshot to a new index named `kusotmize-restore`.
+# Deleting `esrestore/kustomize-restore` will not delete the restored index.
+# Deleting `esrestore/kustomize-restore` should happen before deleting `essnapshot/kustomize-snapshot`.
+apiVersion: elasticsearch.cloud.google.com/v1alpha1
+kind: ESRestore
+metadata:
+  name: kustomize-restore
+spec:
+  include_global_state: true
+  ignore_unavailable: true
+  rename_pattern: kustomize
+  rename_replacement: kustomize-restore
+  essnapshot:
+    name: kustomize-snapshot
+  escluster:
+    name: esbasic

api/internal/crawl/config/elastic/essnaptshot.yaml

@@ -0,0 +1,15 @@
+# Creating `essnapshot/kustomize-snapshot` will create a snapshot named `kustomize-snapshot` in the `kustomize-backup` snapshot repository.
+# Deleting `essnapshot/kustomize-snapshot` will delete the snapshot.
+# Deleting `essnapshot/kustomize-snapshot` should happen before deleting `esbackup/kustomize-backup`.
+apiVersion: elasticsearch.cloud.google.com/v1alpha1
+kind: ESSnapshot
+metadata:
+  name: kustomize-snapshot
+spec:
+  # indices are optional. If not specified all indices are selected.
+  indices:
+  - kustomize
+  include_global_state: true
+  ignore_unavailable: true
+  esbackup:
+    name: kustomize-backup

api/internal/crawl/crawler/crawler.go

@@ -10,6 +10,8 @@ import (
 	"os"
 	"sync"
 
+	"sigs.k8s.io/kustomize/api/internal/crawl/utils"
+
 	"sigs.k8s.io/kustomize/api/internal/crawl/index"
 
 	_ "github.com/gomodule/redigo/redis"
@@ -29,13 +31,15 @@ type Crawler interface {
 	// Crawl returns when it is done processing. This method does not take
 	// ownership of the channel. The channel is write only, and it
 	// designates where the crawler should forward the documents.
-	Crawl(ctx context.Context, output chan<- CrawledDocument) error
+	Crawl(ctx context.Context, output chan<- CrawledDocument, seen utils.SeenMap) error
 
 	// Get the document data given the FilePath, Repo, and Ref/Tag/Branch.
 	FetchDocument(context.Context, *doc.Document) error
 	// Write to the document what the created time is.
 	SetCreated(context.Context, *doc.Document) error
 
+	SetDefaultBranch(*doc.Document)
+
 	Match(*doc.Document) bool
 }
 
@@ -43,7 +47,12 @@ type CrawledDocument interface {
 	ID() string
 	GetDocument() *doc.Document
 	// Get all the Documents directly referred in a Document.
-	GetResources() ([]*doc.Document, error)
+	// For a Document representing a non-kustomization file, an empty slice will be returned.
+	// For a Document representing a kustomization file:
+	// the `includeResources` parameter determines whether the documents referred in the `resources` field are returned or not;
+	// the `includeTransformers` parameter determines whether the documents referred in the `transformers` field are returned or not;
+	// the `includeGenerators` parameter determines whether the documents referred in the `generators` field are returned or not.
+	GetResources(includeResources, includeTransformers, includeGenerators bool) ([]*doc.Document, error)
 	WasCached() bool
 }
 
@@ -69,25 +78,27 @@ func findMatch(d *doc.Document, crawlers []Crawler) Crawler {
 }
 
 func addBranches(cdoc CrawledDocument, match Crawler, indx IndexFunc,
-	seen map[string]struct{}, stack *CrawlSeed) {
+	seen utils.SeenMap, stack *CrawlSeed) {
 
-	seen[cdoc.ID()] = struct{}{}
+	seen.Set(cdoc.ID(), cdoc.GetDocument().FileType)
+
+	match.SetDefaultBranch(cdoc.GetDocument())
 
 	// Insert into index
 	if err := indx(cdoc, index.InsertOrUpdate); err != nil {
-		logger.Printf("Failed to insert or update %s %s: %v",
-			cdoc.GetDocument().RepositoryURL, cdoc.GetDocument().FilePath, err)
+		logger.Printf("Failed to insert or update doc(%s): %v",
+			cdoc.GetDocument().Path(), err)
 		return
 	}
 
-	deps, err := cdoc.GetResources()
+	deps, err := cdoc.GetResources(true, true, true)
 	if err != nil {
 		logger.Println(err)
 		return
 	}
 
 	for _, dep := range deps {
-		if _, ok := seen[dep.ID()]; ok {
+		if seen.Seen(dep.ID()) && seen.Value(dep.ID()) == dep.FileType {
 			continue
 		}
 		*stack = append(*stack, dep)
@@ -95,7 +106,7 @@ func addBranches(cdoc CrawledDocument, match Crawler, indx IndexFunc,
 }
 
 func doCrawl(ctx context.Context, docsPtr *CrawlSeed, crawlers []Crawler, conv Converter, indx IndexFunc,
-	seen map[string]struct{}, stack *CrawlSeed) {
+	seen utils.SeenMap, stack *CrawlSeed, refreshDoc bool, updateFileType bool) {
 
 	UpdatedDocCount := 0
 	seenDocCount := 0
@@ -105,6 +116,7 @@ func doCrawl(ctx context.Context, docsPtr *CrawlSeed, crawlers []Crawler, conv C
 	SetCreatedErrCount := 0
 	convErrCount := 0
 	deleteDocCount := 0
+	crawledDocCount := 0
 
 	// During the execution of the for loop, more Documents may be added into (*docsPtr).
 	for len(*docsPtr) > 0 {
@@ -114,13 +126,19 @@ func doCrawl(ctx context.Context, docsPtr *CrawlSeed, crawlers []Crawler, conv C
 		// remove the last Document in (*docPtr)
 		*docsPtr = (*docsPtr)[:(len(*docsPtr) - 1)]
 
-		if _, ok := seen[tail.ID()]; ok {
-			seenDocCount++
-			continue
+		crawledDocCount++
+		logger.Printf("Crawling doc %d: %s", crawledDocCount, tail.Path())
+
+		if seen.Seen(tail.ID()) {
+			if !updateFileType || seen.Value(tail.ID()) == tail.FileType {
+				logger.Printf("this doc has been seen before")
+				seenDocCount++
+				continue
+			}
 		}
 
 		if tail.WasCached() {
-			logger.Printf("%s %s is cached already", tail.RepositoryURL, tail.FilePath)
+			logger.Printf("doc(%s) is cached already", tail.Path())
 			cachedDocCount++
 			continue
 		}
@@ -132,36 +150,52 @@ func doCrawl(ctx context.Context, docsPtr *CrawlSeed, crawlers []Crawler, conv C
 			continue
 		}
 
-		logger.Println("Crawling ", tail.RepositoryURL, tail.FilePath)
-		if err := match.FetchDocument(ctx, tail); err != nil {
-			logger.Printf("FetchDocument failed on %s %s: %v",
-				tail.RepositoryURL, tail.FilePath, err)
-			FetchDocumentErrCount++
-			// delete the document from the index
-			cdoc := &doc.KustomizationDocument{
-				Document: *tail,
-			}
-			seen[cdoc.ID()] = struct{}{}
-			if err := indx(cdoc, index.Delete); err != nil {
-				logger.Printf("Failed to delete %s %s: %v",
-					cdoc.RepositoryURL, cdoc.FilePath, err)
-			}
-			deleteDocCount++
-			continue
+		if tail.User == "" {
+			tail.User = doc.UserName(tail.RepositoryURL)
 		}
 
-		if err := match.SetCreated(ctx, tail); err != nil {
-			logger.Printf("SetCreated failed on %s %s: %v",
-				tail.RepositoryURL, tail.FilePath, err)
-			SetCreatedErrCount++
+		// If the Document represents a kustomization root, FetchDcoument will change
+		// the `filePath` field of the Document by adding `kustomization.yaml` or
+		// `kustomization.yml` or `kustomization` into the the field.
+		// Therefore, it is necessary to add the ID of the Document into seen before
+		// calling FetchDocument. Otherwise, the binary may enter into an infinite loop
+		// if a kustomization file points to its kustmozation root in its `resources` or
+		// `bases` field.
+		seen.Set(tail.ID(), tail.FileType)
+
+		if refreshDoc || tail.DefaultBranch == "" {
+			match.SetDefaultBranch(tail)
+		}
+
+		if refreshDoc || tail.DocumentData == "" {
+			if err := match.FetchDocument(ctx, tail); err != nil {
+				logger.Printf("FetchDocument failed on doc(%s): %v", tail.Path(), err)
+				FetchDocumentErrCount++
+				// delete the document from the index
+				cdoc := &doc.KustomizationDocument{
+					Document: *tail,
+				}
+				seen.Set(cdoc.ID(), tail.FileType)
+				if err := indx(cdoc, index.Delete); err != nil {
+					logger.Printf("Failed to delete doc(%s): %v", cdoc.Path(), err)
+				}
+				deleteDocCount++
+				continue
+			}
+		}
+
+		if refreshDoc || tail.CreationTime == nil {
+			if err := match.SetCreated(ctx, tail); err != nil {
+				logger.Printf("SetCreated failed on doc(%s): %v", tail.Path(), err)
+				SetCreatedErrCount++
+			}
 		}
 
 		cdoc, err := conv(tail)
 		// If conv returns an error, cdoc can still be added into the index so that
 		// cdoc.Document can be searched.
 		if err != nil {
-			logger.Printf("conv failed on %s %s: %v",
-				tail.RepositoryURL, tail.FilePath, err)
+			logger.Printf("conv failed on doc(%s): %v", tail.Path(), err)
 			convErrCount++
 		}
 
@@ -182,7 +216,7 @@ func doCrawl(ctx context.Context, docsPtr *CrawlSeed, crawlers []Crawler, conv C
 // CrawlFromSeed updates all the documents in seed, and crawls all the new
 // documents referred in the seed.
 func CrawlFromSeed(ctx context.Context, seed CrawlSeed, crawlers []Crawler,
-	conv Converter, indx IndexFunc, seen map[string]struct{}) {
+	conv Converter, indx IndexFunc, seen utils.SeenMap) {
 
 	// stack tracks the documents directly referred in other documents.
 	stack := make(CrawlSeed, 0)
@@ -190,14 +224,14 @@ func CrawlFromSeed(ctx context.Context, seed CrawlSeed, crawlers []Crawler,
 	// Exploit seed to update bulk of corpus.
 	logger.Printf("updating %d documents from seed\n", len(seed))
 	// each unique document in seed will be crawled once.
-	doCrawl(ctx, &seed, crawlers, conv, indx, seen, &stack)
+	doCrawl(ctx, &seed, crawlers, conv, indx, seen, &stack, true, false)
 
 	// Traverse any new documents added while updating corpus.
 	logger.Printf("crawling %d new documents found in the seed\n", len(stack))
 	// While crawling each document in stack, the documents directly referred in the document
 	// will be added into stack.
 	// After this statement is done, stack will become empty.
-	doCrawl(ctx, &stack, crawlers, conv, indx, seen, &stack)
+	doCrawl(ctx, &stack, crawlers, conv, indx, seen, &stack, false, true)
 }
 
 // CrawlGithubRunner is a blocking function and only returns once all of the
@@ -218,7 +252,7 @@ func CrawlFromSeed(ctx context.Context, seed CrawlSeed, crawlers []Crawler,
 // from the seed will be processed before any other documents from the
 // crawlers.
 func CrawlGithubRunner(ctx context.Context, output chan<- CrawledDocument,
-	crawlers []Crawler) []error {
+	crawlers []Crawler, seen utils.SeenMap) []error {
 
 	errs := make([]error, len(crawlers))
 	wg := sync.WaitGroup{}
@@ -252,7 +286,7 @@ func CrawlGithubRunner(ctx context.Context, output chan<- CrawledDocument,
 				}
 			}()
 			defer close(docs)
-			errs[idx] = crawler.Crawl(ctx, docs)
+			errs[idx] = crawler.Crawl(ctx, docs, seen)
 		}(i, crawler, docs) // Copies the index and the crawler
 	}
 
@@ -262,7 +296,7 @@ func CrawlGithubRunner(ctx context.Context, output chan<- CrawledDocument,
 
 // CrawlGithub crawls all the kustomization files on Github.
 func CrawlGithub(ctx context.Context, crawlers []Crawler, conv Converter,
-	indx IndexFunc, seen map[string]struct{}) {
+	indx IndexFunc, seen utils.SeenMap) {
 	// stack tracks the documents directly referred in other documents.
 	stack := make(CrawlSeed, 0)
 
@@ -274,8 +308,14 @@ func CrawlGithub(ctx context.Context, crawlers []Crawler, conv Converter,
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
+		docCount := 0
 		for cdoc := range ch {
-			if _, ok := seen[cdoc.ID()]; ok {
+			docCount++
+			logger.Printf("Processing doc %d found on Github", docCount)
+			// all the docs here are kustomization files found by querying Github, and
+			// their `FileType` fields all should be empty.
+			if seen.Seen(cdoc.ID()) {
+				logger.Printf("the doc has been seen before")
 				continue
 			}
 			match := findMatch(cdoc.GetDocument(), crawlers)
@@ -289,7 +329,7 @@ func CrawlGithub(ctx context.Context, crawlers []Crawler, conv Converter,
 	}()
 
 	logger.Println("processing the documents found from crawling github")
-	if errs := CrawlGithubRunner(ctx, ch, crawlers); errs != nil {
+	if errs := CrawlGithubRunner(ctx, ch, crawlers, seen); errs != nil {
 		for _, err := range errs {
 			logIfErr(err)
 		}
@@ -300,5 +340,5 @@ func CrawlGithub(ctx context.Context, crawlers []Crawler, conv Converter,
 	// Handle deps of newly discovered documents.
 	logger.Printf("crawling the %d new documents referred by other documents",
 		len(stack))
-	doCrawl(ctx, &stack, crawlers, conv, indx, seen, &stack)
+	doCrawl(ctx, &stack, crawlers, conv, indx, seen, &stack, false, true)
 }

api/internal/crawl/crawler/crawler_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log"
 	"reflect"
 	"sort"
 	"strings"
@@ -11,6 +12,8 @@ import (
 	"testing"
 	"time"
 
+	"sigs.k8s.io/kustomize/api/internal/crawl/utils"
+
 	"sigs.k8s.io/kustomize/api/internal/crawl/index"
 
 	"sigs.k8s.io/kustomize/api/internal/crawl/doc"
@@ -34,6 +37,8 @@ func (c testCrawler) Match(d *doc.Document) bool {
 	return d != nil
 }
 
+func (c testCrawler) SetDefaultBranch(d *doc.Document) {}
+
 func (c testCrawler) FetchDocument(_ context.Context, d *doc.Document) error {
 	if i, ok := c.lukp[d.ID()]; ok {
 		d.DocumentData = c.docs[i].DocumentData
@@ -75,7 +80,7 @@ func newCrawler(matchPrefix string, err error,
 
 // Crawl implements the Crawler interface for testing.
 func (c testCrawler) Crawl(_ context.Context,
-	output chan<- CrawledDocument) error {
+	output chan<- CrawledDocument, _ utils.SeenMap) error {
 
 	for i, d := range c.docs {
 		isResource := true
@@ -110,7 +115,7 @@ func (s sortableDocs) Len() int {
 }
 
 func TestCrawlGithubRunner(t *testing.T) {
-	fmt.Println("testing CrawlGithubRunner")
+	log.Println("testing CrawlGithubRunner")
 	tests := []struct {
 		tc   []Crawler
 		errs []error
@@ -181,8 +186,9 @@ func TestCrawlGithubRunner(t *testing.T) {
 			defer close(output)
 			defer wg.Done()
 
+			seen := utils.NewSeenMap()
 			errs := CrawlGithubRunner(context.Background(),
-				output, test.tc)
+				output, test.tc, seen)
 
 			// Check that errors are returned as they should be.
 			if !reflect.DeepEqual(errs, test.errs) {
@@ -215,7 +221,7 @@ func TestCrawlGithubRunner(t *testing.T) {
 }
 
 func TestCrawlFromSeed(t *testing.T) {
-	fmt.Println("testing CrawlFromSeed")
+	log.Println("testing CrawlFromSeed")
 
 	tests := []struct {
 		seed    CrawlSeed
@@ -322,7 +328,7 @@ resources:
 				visited[d.ID()]++
 				return nil
 			},
-			make(map[string]struct{}),
+			utils.NewSeenMap(),
 		)
 		if lv, lc := len(visited), len(tc.corpus); lv != lc {
 			t.Errorf("error: %d of %d documents visited.", lv, lc)

api/internal/crawl/crawler/github/crawler.go

@@ -16,6 +16,8 @@ import (
 	"strings"
 	"time"
 
+	"sigs.k8s.io/kustomize/api/internal/crawl/utils"
+
 	"sigs.k8s.io/kustomize/api/internal/crawl/crawler"
 	"sigs.k8s.io/kustomize/api/internal/crawl/doc"
 	"sigs.k8s.io/kustomize/api/internal/crawl/httpclient"
@@ -30,6 +32,8 @@ var logger = log.New(os.Stdout, "Github Crawler: ",
 type githubCrawler struct {
 	client GhClient
 	query  Query
+	// branchMap maps github repositories to their default branches
+	branchMap map[string]string
 }
 
 type GhClient struct {
@@ -51,13 +55,60 @@ func NewCrawler(accessToken string, retryCount uint64, client *http.Client,
 			},
 			accessToken: accessToken,
 		},
-		query: query,
+		query:     query,
+		branchMap: map[string]string{},
 	}
 }
 
+func (gc githubCrawler) SetDefaultBranch(d *doc.Document) {
+	url := gc.client.ReposRequest(d.RepositoryFullName())
+	defaultBranch, err := gc.client.GetDefaultBranch(url, d.RepositoryURL, gc.branchMap)
+	if err != nil {
+		logger.Printf(
+			"(error: %v) setting default_branch to master\n", err)
+		defaultBranch = "master"
+	}
+	d.DefaultBranch = defaultBranch
+	gc.branchMap[d.RepositoryURL] = d.DefaultBranch
+}
+
+func (gc githubCrawler) DefaultBranch(repo string) string {
+	return gc.branchMap[repo]
+}
+
 // Implements crawler.Crawler.
-func (gc githubCrawler) Crawl(
-	ctx context.Context, output chan<- crawler.CrawledDocument) error {
+func (gc githubCrawler) Crawl(ctx context.Context,
+	output chan<- crawler.CrawledDocument, seen utils.SeenMap) error {
+
+	ranges := []RangeWithin{
+		RangeWithin{
+		start: uint64(0),
+		end:   githubMaxFileSize,
+	},
+	}
+
+	errs := make(multiError, 0)
+	for len(ranges) > 0 {
+		tailRange := ranges[len(ranges) - 1]
+		ranges = ranges[:(len(ranges) - 1)]
+		reProcessQueryRanges, err := gc.CrawlSingleRange(ctx, output, seen, tailRange.start, tailRange.end)
+		if err != nil {
+			errs = append(errs, err)
+		}
+		ranges = append(ranges, reProcessQueryRanges...)
+	}
+
+	if len(errs) > 0 {
+		return errs
+	}
+	return nil
+}
+
+func (gc githubCrawler) CrawlSingleRange(ctx context.Context,
+	output chan<- crawler.CrawledDocument, seen utils.SeenMap,
+	lowerBound, upperBound uint64) ([]RangeWithin, error) {
+
+	log.Printf("CrawlSingleRange [%d, %d]", lowerBound, upperBound)
 
 	noETagClient := GhClient{
 		RequestConfig: gc.client.RequestConfig,
@@ -66,12 +117,25 @@ func (gc githubCrawler) Crawl(
 		accessToken:   gc.client.accessToken,
 	}
 
+	var reProcessQueryRanges []RangeWithin
+
+	var ranges []string
+	var err error
 	// Since Github returns a max of 1000 results per query, we can use
 	// multiple queries that split the search space into chunks of at most
 	// 1000 files to get all of the data.
-	ranges, err := FindRangesForRepoSearch(newCache(noETagClient, gc.query))
+	for i := 0; i < 5; i++ {
+		ranges, err = FindRangesForRepoSearch(newCache(noETagClient, gc.query),
+			lowerBound, upperBound)
+		if err == nil {
+			logger.Printf("FindRangesForRepoSearch succeeded after %d retries", i)
+			break
+		} else {
+			time.Sleep(time.Minute)
+		}
+	}
 	if err != nil {
-		return fmt.Errorf("could not split %v into ranges, %v\n",
+		return reProcessQueryRanges, fmt.Errorf("could not split %v into ranges, %v\n",
 			gc.query, err)
 	}
 
@@ -79,35 +143,31 @@ func (gc githubCrawler) Crawl(
 
 	// Query each range for files.
 	errs := make(multiError, 0)
+	queryResult := RangeQueryResult{}
 	for _, query := range ranges {
-		err := processQuery(ctx, gc.client, query, output)
+		reProcessQuery, rangeResult, err := processQuery(ctx, gc.client, query, output, seen, gc.branchMap)
 		if err != nil {
 			errs = append(errs, err)
 		}
+		queryResult.Add(rangeResult)
+		if reProcessQuery {
+			reProcessQueryRanges = append(reProcessQueryRanges, RangeSizes(query))
+		}
 	}
 
+	logger.Printf("Summary of Crawl: %s", queryResult.String())
+
 	if len(errs) > 0 {
-		return errs
+		return reProcessQueryRanges, errs
 	}
 
-	return nil
+	return reProcessQueryRanges, nil
 }
 
 // FetchDocument first tries to fetch the document with d.FilePath. If it fails,
 // it will try to add each string in konfig.RecognizedKustomizationFileNames() to
 // d.FilePath, and try to fetch the document again.
 func (gc githubCrawler) FetchDocument(_ context.Context, d *doc.Document) error {
-	// set the default branch if it is empty
-	if d.DefaultBranch == "" {
-		url := gc.client.ReposRequest(d.RepositoryFullName())
-		defaultBranch, err := gc.client.GetDefaultBranch(url)
-		if err != nil {
-			logger.Printf(
-				"(error: %v) setting default_branch to master\n", err)
-			defaultBranch = "master"
-		}
-		d.DefaultBranch = defaultBranch
-	}
 	repoURL := d.RepositoryURL + "/" + d.FilePath + "?ref=" + d.DefaultBranch
 	repoSpec, err := git.NewRepoSpecFromUrl(repoURL)
 	if err != nil {
@@ -176,10 +236,32 @@ func (gc githubCrawler) Match(d *doc.Document) bool {
 	return strings.Contains(repoSpec.Host, "github.com")
 }
 
+type RangeQueryResult struct {
+	totalDocCnt uint64
+	seenDocCnt  uint64
+	newDocCnt   uint64
+	errorCnt    uint64
+}
+
+func (r *RangeQueryResult) Add(other RangeQueryResult) {
+	r.totalDocCnt += other.totalDocCnt
+	r.newDocCnt += other.newDocCnt
+	r.seenDocCnt += other.seenDocCnt
+	r.errorCnt += other.errorCnt
+}
+
+func (r *RangeQueryResult) String() string {
+	return fmt.Sprintf("got %d files from API. "+
+		"%d have been seen before. %d are new and sent to the output channel."+
+		" %d have kustomizationResultAdapter errors.",
+		r.totalDocCnt, r.seenDocCnt, r.newDocCnt, r.errorCnt)
+}
+
 // processQuery follows all of the pages in a query, and updates/adds the
 // documents from the crawl to the datastore/index.
 func processQuery(ctx context.Context, gcl GhClient, query string,
-	output chan<- crawler.CrawledDocument) error {
+	output chan<- crawler.CrawledDocument, seen utils.SeenMap,
+	branchMap map[string]string) (bool, RangeQueryResult, error) {
 
 	queryPages := make(chan GhResponseInfo)
 
@@ -195,57 +277,84 @@ func processQuery(ctx context.Context, gcl GhClient, query string,
 		close(queryPages)
 	}()
 
+	reProcessQuery := false
+
 	errs := make(multiError, 0)
-	errorCnt := 0
-	totalCnt := 0
+	result := RangeQueryResult{}
+	pageID := 1
 	for page := range queryPages {
 		if page.Error != nil {
 			errs = append(errs, page.Error)
 			continue
 		}
-
+		pageResult := RangeQueryResult{}
 		for _, file := range page.Parsed.Items {
-			k, err := kustomizationResultAdapter(gcl, file)
+			k, err := kustomizationResultAdapter(gcl, file, seen, branchMap)
 			if err != nil {
 				logger.Printf("kustomizationResultAdapter failed: %v", err)
 				errs = append(errs, err)
-				errorCnt++
+				pageResult.errorCnt++
 			}
 			if k != nil {
+				pageResult.newDocCnt++
 				output <- k
+			} else {
+				pageResult.seenDocCnt++
 			}
-			totalCnt++
+			pageResult.totalDocCnt++
 		}
 
-		logger.Printf("got %d files out of %d from API. %d of %d had errors\n",
-			totalCnt, page.Parsed.TotalCount, errorCnt, totalCnt)
+		logger.Printf("processQuery [TotalCount %d - page %d]: %s",
+			page.Parsed.TotalCount, pageID, pageResult.String())
+		result.Add(pageResult)
+
+		pageID++
+
+		if page.Parsed.TotalCount > githubMaxResultsPerQuery {
+			reProcessQuery = true
+		}
 	}
 
-	return errs
+	logger.Printf("Summary of processQuery: %s", result.String())
+
+	return reProcessQuery, result, errs
 }
 
-func kustomizationResultAdapter(gcl GhClient, k GhFileSpec) (
-	crawler.CrawledDocument, error) {
-
-	data, err := gcl.GetFileData(k)
-	if err != nil {
-		return nil, err
-	}
-
+func kustomizationResultAdapter(gcl GhClient, k GhFileSpec, seen utils.SeenMap,
+	branchMap map[string]string) (crawler.CrawledDocument, error) {
 	url := gcl.ReposRequest(k.Repository.FullName)
-	defaultBranch, err := gcl.GetDefaultBranch(url)
+	defaultBranch, err := gcl.GetDefaultBranch(url, k.Repository.URL, branchMap)
 	if err != nil {
 		logger.Printf(
 			"(error: %v) setting default_branch to master\n", err)
 		defaultBranch = "master"
 	}
 
+	// document here is a kustomization file found by querying Github, whose
+	// `FileType` field should be empty.
+	document := doc.Document{
+		FilePath:      k.Path,
+		DefaultBranch: defaultBranch,
+		RepositoryURL: k.Repository.URL,
+		User:          doc.UserName(k.Repository.URL),
+	}
+
+	if seen.Seen(document.ID()) {
+		return nil, nil
+	}
+
+	data, err := gcl.GetFileData(k)
+	if err != nil {
+		return nil, err
+	}
+
 	d := doc.KustomizationDocument{
 		Document: doc.Document{
 			DocumentData:  string(data),
 			FilePath:      k.Path,
 			DefaultBranch: defaultBranch,
 			RepositoryURL: k.Repository.URL,
+			User:          doc.UserName(k.Repository.URL),
 		},
 	}
 	creationTime, err := gcl.GetFileCreationTime(k)
@@ -270,7 +379,7 @@ func (gcl GhClient) ForwardPaginatedQuery(ctx context.Context, query string,
 	output chan<- GhResponseInfo) error {
 
 	logger.Println("querying: ", query)
-	response := gcl.parseGithubResponse(query)
+	response := gcl.parseGithubResponseWithRetry(query)
 
 	if response.Error != nil {
 		return response.Error
@@ -283,7 +392,7 @@ func (gcl GhClient) ForwardPaginatedQuery(ctx context.Context, query string,
 		case <-ctx.Done():
 			return nil
 		default:
-			response = gcl.parseGithubResponse(response.NextURL)
+			response = gcl.parseGithubResponseWithRetry(response.NextURL)
 			if response.Error != nil {
 				return response.Error
 			}
@@ -344,7 +453,15 @@ func CloseResponseBody(resp *http.Response) {
 	}
 }
 
-func (gcl GhClient) GetDefaultBranch(url string) (string, error) {
+// GetDefaultBranch gets the default branch of a github repository.
+// m is a map which maps a github repository to its default branch.
+// If repo is already in m, the default branch for url will be obtained from m;
+// otherwise, a query will be made to github to obtain the default branch.
+func (gcl GhClient) GetDefaultBranch(url, repo string, m map[string]string) (string, error) {
+	if v, ok := m[repo]; ok {
+		return v, nil
+	}
+
 	resp, err := gcl.GetReposData(url)
 	if err != nil {
 		return "", fmt.Errorf(
@@ -470,6 +587,8 @@ type githubResponse struct {
 	// This is the number of files that match the query.
 	TotalCount uint64 `json:"total_count,omitempty"`
 
+	IncompleteResults bool `json:"incomplete_results,omitempty"`
+
 	// Github representation of a file.
 	Items []GhFileSpec `json:"items,omitempty"`
 }
@@ -512,6 +631,17 @@ func parseGithubLinkFormat(links string) (string, string) {
 	return next, last
 }
 
+func (gcl GhClient) parseGithubResponseWithRetry(getRequest string) GhResponseInfo {
+	resp := gcl.parseGithubResponse(getRequest)
+	retries := 0
+	for resp.Parsed.IncompleteResults {
+		resp = gcl.parseGithubResponse(getRequest)
+		retries++
+	}
+	log.Printf("The result of query(%s) is complete after %d retries", getRequest, retries)
+	return resp
+}
+
 func (gcl GhClient) parseGithubResponse(getRequest string) GhResponseInfo {
 	resp, err := gcl.SearchGithubAPI(getRequest)
 	requestInfo := GhResponseInfo{
@@ -589,7 +719,7 @@ func (gcl GhClient) Do(query string) (*http.Response, error) {
 
 	// gcl.client.Do: a non-2xx status code doesn't cause an error.
 	// See https://golang.org/pkg/net/http/#Client.Do for more info.
-	resp, err :=  gcl.client.Do(req)
+	resp, err := gcl.client.Do(req)
 	if resp != nil && resp.StatusCode != http.StatusOK {
 		err = fmt.Errorf("GhClient.Do(%s) failed with response code: %d",
 			query, resp.StatusCode)

api/internal/crawl/crawler/github/queries.go

@@ -117,7 +117,7 @@ type RequestConfig struct {
 // understand why the request object is useful.
 func (rc RequestConfig) CodeSearchRequestWith(query Query) request {
 	vals := url.Values{
-		"sort": []string{"indexed"},
+		"sort":  []string{"indexed"},
 		"order": []string{"desc"},
 	}
 	req := rc.makeRequest("search/code", query, vals)
@@ -166,7 +166,7 @@ type request struct {
 	query Query
 }
 
-// CopyWith copies the requests and adds the extra query parameters. Usefull
+// CopyWith copies the requests and adds the extra query parameters. It is useful
 // for dynamically adding sizes to a filename only query without modifying it.
 func (r request) CopyWith(queryParams ...queryField) request {
 	cpy := r

api/internal/crawl/crawler/github/split_search_ranges.go

@@ -93,13 +93,15 @@ package github
 //   apiCallsPerResult * 10(pages) * 100(resultsPerPage) * totalResults / 1000
 //   = apiCallsPerResult * totalResults.
 //
-// So it could very well take apiCallsPerResult * 50 times longer to acutally
+// So it could very well take apiCallsPerResult * 50 times longer to actually
 // fetch the results (assuming the quotas for the API calls are the same as the
 // search API), than it does to perform these range searches.
 
 import (
 	"fmt"
 	"math/bits"
+	"strconv"
+	"strings"
 )
 
 // Files cannot be more than 2^19 bytes, according to
@@ -112,7 +114,7 @@ const (
 // Interface instead of struct for testing purposes.
 // Not expecting to have multiple implementations.
 type cachedSearch interface {
-	CountResults(uint64) (uint64, error)
+	CountResults(uint64, uint64) (uint64, error)
 	RequestString(filesize rangeFormatter) string
 }
 
@@ -139,7 +141,7 @@ type cachedSearch interface {
 //    problematic). The current cache implementation looks at the
 //    predecessor entry to find out if the current value is monotonic.
 //    This is where the bit trick is used, since each step in the binary
-//    search is adding or ommiting to add a decreasing power of 2 to the query
+//    search is adding or omitting to add a decreasing power of 2 to the query
 //    value, we can remove the least significant set bit to find the
 //    predecessor in constant time. Ultimately since the search is rate
 //    limited, we could also easily afford to compute this in linear time
@@ -161,16 +163,16 @@ func newCache(client GhClient, query Query) githubCachedSearch {
 	}
 }
 
-func (c githubCachedSearch) CountResults(upperBound uint64) (uint64, error) {
+func (c githubCachedSearch) CountResults(lowerBound, upperBound uint64) (uint64, error) {
 	count, cached := c.cache[upperBound]
 	if cached {
 		return count, nil
 	}
 
-	sizeRange := RangeWithin{0, upperBound}
+	sizeRange := RangeWithin{lowerBound, upperBound}
 	rangeRequest := c.RequestString(sizeRange)
 
-	result := c.gcl.parseGithubResponse(rangeRequest)
+	result := c.gcl.parseGithubResponseWithRetry(rangeRequest)
 	if result.Error != nil {
 		return count, result.Error
 	}
@@ -204,7 +206,7 @@ func (c githubCachedSearch) CountResults(upperBound uint64) (uint64, error) {
 			"Retrying query... current lower bound: %d, got: %d\n",
 			c.cache[prev], result.Parsed.TotalCount)
 
-		result = c.gcl.parseGithubResponse(rangeRequest)
+		result = c.gcl.parseGithubResponseWithRetry(rangeRequest)
 		if result.Error != nil {
 			return count, result.Error
 		}
@@ -219,8 +221,8 @@ func (c githubCachedSearch) CountResults(upperBound uint64) (uint64, error) {
 	}
 
 	count = result.Parsed.TotalCount
-	logger.Printf("Caching new query %s, with count %d\n",
-		sizeRange.RangeString(), count)
+	logger.Printf("Caching new query %s, with count %d (incomplete_results: %v)\n",
+		sizeRange.RangeString(), count, result.Parsed.IncompleteResults)
 	c.cache[upperBound] = count
 	return count, nil
 }
@@ -238,8 +240,8 @@ func (c githubCachedSearch) RequestString(filesize rangeFormatter) string {
 // This would mean that the search as it is could not find all files. If queries
 // are sorted by last indexed, and retrieved on regular intervals, it should be
 // sufficient to get most if not all documents.
-func FindRangesForRepoSearch(cache cachedSearch) ([]string, error) {
-	totalFiles, err := cache.CountResults(githubMaxFileSize)
+func FindRangesForRepoSearch(cache cachedSearch, lowerBound, upperBound uint64) ([]string, error) {
+	totalFiles, err := cache.CountResults(lowerBound, upperBound)
 	if err != nil {
 		return nil, err
 	}
@@ -247,7 +249,7 @@ func FindRangesForRepoSearch(cache cachedSearch) ([]string, error) {
 
 	if githubMaxResultsPerQuery >= totalFiles {
 		return []string{
-			cache.RequestString(RangeWithin{0, githubMaxFileSize}),
+			cache.RequestString(RangeWithin{lowerBound, upperBound}),
 		}, nil
 	}
 
@@ -275,6 +277,7 @@ func FindRangesForRepoSearch(cache cachedSearch) ([]string, error) {
 	// range.
 	filesAccessible := uint64(0)
 	sizes := make([]uint64, 0)
+	sizes = append(sizes, lowerBound)
 	for filesAccessible < totalFiles {
 		target := filesAccessible + githubMaxResultsPerQuery
 		if target >= totalFiles {
@@ -284,22 +287,22 @@ func FindRangesForRepoSearch(cache cachedSearch) ([]string, error) {
 		logger.Printf("%d accessible files, next target = %d\n",
 			filesAccessible, target)
 
-		cur, err := lowerBoundFileCount(cache, target)
+		size, err := FindFileSize(cache, target, lowerBound, upperBound)
 		if err != nil {
 			return nil, err
 		}
 
 		// If there are more than 1000 files in the next bucket, we must
 		// advance anyway and lose out on some files :(.
-		if l := len(sizes); l > 0 && sizes[l-1] == cur {
-			cur++
+		if l := len(sizes); l > 0 && sizes[l-1] == size {
+			size++
 		}
 
-		nextAccessible, err := cache.CountResults(cur)
+		nextAccessible, err := cache.CountResults(lowerBound, size)
 		if err != nil {
 			return nil, fmt.Errorf(
 				"cache should be populated at %d already, got %v",
-				cur, err)
+				size, err)
 		}
 		if nextAccessible < filesAccessible {
 			return nil, fmt.Errorf(
@@ -309,31 +312,31 @@ func FindRangesForRepoSearch(cache cachedSearch) ([]string, error) {
 
 		filesAccessible = nextAccessible
 		if nextAccessible < totalFiles {
-			sizes = append(sizes, cur)
+			sizes = append(sizes, size)
 		}
 	}
-
+	sizes = append(sizes, upperBound)
 	return formatFilesizeRanges(cache, sizes), nil
 }
 
-// lowerBoundFileCount finds the filesize range from [0, return value] that has
+// FindFileSize finds the filesize range from [lowerBound, return value] that has
 // the largest file count that is smaller than or equal to
 // githubMaxResultsPerQuery. It is important to note that this returned value
 // could already be in a previous range if the next file size has more than 1000
 // results. It is left to the caller to handle this bit of logic and guarantee
 // forward progession in this case.
-func lowerBoundFileCount(
-	cache cachedSearch, targetFileCount uint64) (uint64, error) {
+func FindFileSize(
+	cache cachedSearch, targetFileCount, lowerBound, upperBound uint64) (uint64, error) {
 
 	// Binary search for file sizes that make up the next <=1000 element
 	// chunk.
-	cur := uint64(0)
-	increase := githubMaxFileSize / 2
+	cur := lowerBound
+	increase := (upperBound - lowerBound) / 2
 
 	for increase > 0 {
 		mid := cur + increase
 
-		count, err := cache.CountResults(mid)
+		count, err := cache.CountResults(lowerBound, mid)
 		if err != nil {
 			return count, err
 		}
@@ -353,26 +356,24 @@ func lowerBoundFileCount(
 }
 
 func formatFilesizeRanges(cache cachedSearch, sizes []uint64) []string {
-	ranges := make([]string, 0, len(sizes)+1)
-
-	if len(sizes) > 0 {
-		ranges = append(ranges, cache.RequestString(
-			RangeLessThan{sizes[0] + 1},
-		))
+	n := len(sizes)
+	if n < 2 {
+		return []string{}
 	}
 
-	for i := 0; i < len(sizes)-1; i += 1 {
-		ranges = append(ranges, cache.RequestString(
-			RangeWithin{sizes[i] + 1, sizes[i+1]},
-		))
-
-		if i != len(sizes)-2 {
-			continue
-		}
-		ranges = append(ranges, cache.RequestString(
-			RangeGreaterThan{sizes[i+1]},
-		))
+	ranges := make([]string, 0, n-1)
+	ranges = append(ranges, cache.RequestString(RangeWithin{sizes[0], sizes[1]}))
+	for i := 1; i < n-1; i++ {
+		ranges = append(ranges, cache.RequestString(RangeWithin{sizes[i] + 1, sizes[i+1]}))
 	}
-
 	return ranges
 }
+
+func RangeSizes(s string) RangeWithin {
+	start := strings.Index(s, "+size:") + len("+size:")
+	end := strings.Index(s, "&")
+	ranges := strings.Split(s[start:end], "..")
+	lowerBound, _ := strconv.ParseUint(ranges[0], 10, 64)
+	upperBound, _ := strconv.ParseUint(ranges[1], 10, 64)
+	return RangeWithin{lowerBound, upperBound}
+}

api/internal/crawl/crawler/github/split_search_ranges_test.go

@@ -2,6 +2,7 @@ package github
 
 import (
 	"fmt"
+	"log"
 	"reflect"
 	"testing"
 )
@@ -10,8 +11,8 @@ type testCachedSearch struct {
 	cache map[uint64]uint64
 }
 
-func (c testCachedSearch) CountResults(upperBound uint64) (uint64, error) {
-	fmt.Printf("CountResults(%05x)\n", upperBound)
+func (c testCachedSearch) CountResults(lowerBound, upperBound uint64) (uint64, error) {
+	log.Printf("CountResults(%05x)\n", upperBound)
 	count, ok := c.cache[upperBound]
 	if !ok {
 		return count, fmt.Errorf("cache not set at %x", upperBound)
@@ -72,19 +73,29 @@ func TestRangeSplitting(t *testing.T) {
 		},
 	}
 
-	requests, err := FindRangesForRepoSearch(cache)
+	requests, err := FindRangesForRepoSearch(cache, 0, 524288)
 	if err != nil {
 		t.Errorf("Error while finding ranges: %v", err)
 	}
 	expected := []string{
-		"<107",      // cache.RequestString(RangeLessThan{0x6b}),
-		"107..128",  // cache.RequestString(RangeWithin{0x6b, 0x80}),
-		"129..256",  // cache.RequestString(RangeWithin{0x81, 0x100}),
-		"257..4095", // cache.RequestString(RangeWithin{0x101, 0xfff}),
-		">4095",     // cache.RequestString(RangeGreaterThan{0xfff}),
+		"0..106",       // cache.RequestString(RangeWithin{0x00, 0x6a}),
+		"107..128",     // cache.RequestString(RangeWithin{0x6b, 0x80}),
+		"129..256",     // cache.RequestString(RangeWithin{0x81, 0x100}),
+		"257..4095",    // cache.RequestString(RangeWithin{0x101, 0xfff}),
+		"4096..524288", // cache.RequestString(RangeWithin{0x1000, 0x80000}),
 	}
 
 	if !reflect.DeepEqual(requests, expected) {
 		t.Errorf("Expected requests (%v) to equal (%v)", requests, expected)
 	}
 }
+
+func TestRangeSizes(t *testing.T) {
+	s := "https://api.github.com/search/code?q=filename:kustomization.yaml+filename:kustomization.yml" +
+		"+filename:kustomization+size:2365..10000&order=desc&per_page=100&sort=indexed"
+	returnedResult := RangeSizes(s)
+	expectedResult := RangeWithin{uint64(2365), uint64(10000)}
+	if !reflect.DeepEqual(returnedResult, expectedResult) {
+		t.Errorf("RangeSizes expected (%v), got (%v)",expectedResult, returnedResult)
+	}
+}

api/internal/crawl/doc/doc.go

@@ -2,6 +2,8 @@ package doc
 
 import (
 	"fmt"
+	"log"
+	"path/filepath"
 	"sort"
 	"strings"
 
@@ -44,21 +46,36 @@ type KustomizationDocument struct {
 
 type set map[string]struct{}
 
+func (doc *KustomizationDocument) Copy() *KustomizationDocument {
+	return &KustomizationDocument{
+		Document:    *(doc.Document.Copy()),
+		Kinds:       doc.Kinds,
+		Identifiers: doc.Identifiers,
+		Values:      doc.Values,
+	}
+}
+
 func (doc *KustomizationDocument) String() string {
 	return fmt.Sprintf("%s %s %s %v %v %v len(identifiers):%v  len(values):%v",
 		doc.RepositoryURL, doc.FilePath, doc.DefaultBranch, doc.CreationTime,
 		doc.IsSame, doc.Kinds, len(doc.Identifiers), len(doc.Values))
 }
 
-// Implements the CrawlerDocument interface.
-func (doc *KustomizationDocument) GetResources() ([]*Document, error) {
-	isResource := true
-	for _, suffix := range konfig.RecognizedKustomizationFileNames() {
-		if strings.HasSuffix(doc.FilePath, "/"+suffix) {
-			isResource = false
+// IsKustomizationFile determines whether a file path is a kustomization file
+func IsKustomizationFile(path string) bool {
+	basename := filepath.Base(path)
+	for _, name := range konfig.RecognizedKustomizationFileNames() {
+		if basename == name {
+			return true
 		}
 	}
-	if isResource {
+	return false
+}
+
+// Implements the CrawlerDocument interface.
+func (doc *KustomizationDocument) GetResources(
+	includeResources, includeTransformers, includeGenerators bool) ([]*Document, error) {
+	if !IsKustomizationFile(doc.FilePath) {
 		return []*Document{}, nil
 	}
 
@@ -76,20 +93,44 @@ func (doc *KustomizationDocument) GetResources() ([]*Document, error) {
 	}
 	k.FixKustomizationPostUnmarshalling()
 
-	res := make([]*Document, 0, len(k.Resources))
-	for _, r := range k.Resources {
+	res := make([]*Document, 0)
+
+	if includeResources {
+		resourceDocs := doc.CollectDocuments(k.Resources, "resource")
+		res = append(res, resourceDocs...)
+	}
+
+	if includeGenerators {
+		generatorDocs := doc.CollectDocuments(k.Generators, "generator")
+		res = append(res, generatorDocs...)
+	}
+
+	if includeTransformers {
+		transformerDocs := doc.CollectDocuments(k.Transformers, "transformer")
+		res = append(res, transformerDocs...)
+	}
+
+	return res, nil
+}
+
+// CollectDocuments construct a Document for each path in paths, and return
+// a slice of Document pointers.
+func (doc *KustomizationDocument) CollectDocuments(
+	paths []string, fileType string) []*Document {
+	docs := make([]*Document, 0, len(paths))
+	for _, r := range paths {
 		if strings.TrimSpace(r) == "" {
 			continue
 		}
 		next, err := doc.Document.FromRelativePath(r)
 		if err != nil {
-			fmt.Printf("GetResources error: %v\n", err)
+			log.Printf("CollectDocuments error: %v\n", err)
 			continue
 		}
-		res = append(res, &next)
+		next.FileType = fileType
+		docs = append(docs, &next)
 	}
-
-	return res, nil
+	return docs
 }
 
 func (doc *KustomizationDocument) readBytes() ([]map[string]interface{}, error) {

api/internal/crawl/doc/doc_test.go

@@ -189,11 +189,13 @@ metadata:
 	}
 }
 
+type TestStructForGetResources struct {
+	doc       KustomizationDocument
+	resources []*Document
+}
+
 func TestGetResources(t *testing.T) {
-	tests := []struct {
-		doc       KustomizationDocument
-		resources []*Document
-	}{
+	tests := []TestStructForGetResources{
 		{
 			doc: KustomizationDocument{
 				Document: Document{
@@ -213,19 +215,27 @@ resources:
 				{
 					RepositoryURL: "sigs.k8s.io/kustomize",
 					FilePath:      "some/path/to/base",
+					FileType:      "resource",
+					User:          "sigs.k8s.io",
 				},
 				{
 					RepositoryURL: "sigs.k8s.io/kustomize",
 					FilePath:      "some/path/to/otherbase",
+					FileType:      "resource",
+					User:          "sigs.k8s.io",
 				},
 				{
 					RepositoryURL: "sigs.k8s.io/kustomize",
 					FilePath:      "some/path/to/kdir/file.yaml",
+					FileType:      "resource",
+					User:          "sigs.k8s.io",
 				},
 				{
 					RepositoryURL: "https://github.com/kubernetes-sigs/kustomize",
 					FilePath:      "examples/helloWorld",
 					DefaultBranch: "v3.1.0",
+					FileType:      "resource",
+					User:          "kubernetes-sigs",
 				},
 			},
 		},
@@ -248,9 +258,12 @@ resources:
 			resources: []*Document{},
 		},
 	}
+	runTest(t, tests, true, false, false)
+}
 
+func runTest(t *testing.T, tests []TestStructForGetResources, includeResources, includeTransformers, includeGenerators bool) {
 	for _, test := range tests {
-		res, err := test.doc.GetResources()
+		res, err := test.doc.GetResources(includeResources, includeTransformers, includeGenerators)
 		if err != nil {
 			t.Errorf("Unexpected error: %v\n", err)
 			continue
@@ -284,3 +297,83 @@ resources:
 		}
 	}
 }
+
+func TestGetResourcesAndGenerators(t *testing.T) {
+	tests := []TestStructForGetResources{
+		{
+			doc: KustomizationDocument{
+				Document: Document{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/kustomization.yaml",
+					DocumentData: `
+resources:
+- file.yaml
+
+generators:
+- gen.yaml
+
+transformers:
+- tr.yaml
+`},
+			},
+			resources: []*Document{
+				{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/gen.yaml",
+					FileType:      "generator",
+					User:          "sigs.k8s.io",
+				},
+				{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/file.yaml",
+					FileType:      "resource",
+					User:          "sigs.k8s.io",
+				},
+			},
+		},
+	}
+	runTest(t, tests, true, false, true)
+}
+
+func TestGetResourcesAndGeneratorsAndTransformers(t *testing.T) {
+	tests := []TestStructForGetResources{
+		{
+			doc: KustomizationDocument{
+				Document: Document{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/kustomization.yaml",
+					DocumentData: `
+resources:
+- file.yaml
+
+generators:
+- gen.yaml
+
+transformers:
+- tr.yaml
+`},
+			},
+			resources: []*Document{
+				{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/tr.yaml",
+					FileType:      "transformer",
+					User:          "sigs.k8s.io",
+				},
+				{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/gen.yaml",
+					FileType:      "generator",
+					User:          "sigs.k8s.io",
+				},
+				{
+					RepositoryURL: "sigs.k8s.io/kustomize",
+					FilePath:      "some/path/to/kdir/file.yaml",
+					FileType:      "resource",
+					User:          "sigs.k8s.io",
+				},
+			},
+		},
+	}
+	runTest(t, tests, true, true, true)
+}

api/internal/crawl/doc/docname.go

@@ -11,12 +11,18 @@ import (
 )
 
 type Document struct {
-	RepositoryURL string     `json:"repositoryUrl,omitempty"`
+	RepositoryURL string `json:"repositoryUrl,omitempty"`
+	// User makes it easy to aggregate data in the user level instead
+	// of the repository level
+	User          string     `json:"user,omitempty"`
 	FilePath      string     `json:"filePath,omitempty"`
 	DefaultBranch string     `json:"defaultBranch,omitempty"`
 	DocumentData  string     `json:"document,omitempty"`
 	CreationTime  *time.Time `json:"creationTime,omitempty"`
 	IsSame        bool       `json:"-"`
+	// FileType can be one of the following:
+	// "generator", "transformer", "resource", "".
+	FileType string `json:"fileType,omitempty"`
 }
 
 // Implements the CrawlerDocument interface.
@@ -27,14 +33,21 @@ func (doc *Document) GetDocument() *Document {
 func (doc *Document) Copy() *Document {
 	return &Document{
 		RepositoryURL: doc.RepositoryURL,
+		User:          doc.User,
 		FilePath:      doc.FilePath,
 		DefaultBranch: doc.DefaultBranch,
 		DocumentData:  doc.DocumentData,
 		CreationTime:  doc.CreationTime,
 		IsSame:        doc.IsSame,
+		FileType:      doc.FileType,
 	}
 }
 
+func (doc *Document) Path() string {
+	return fmt.Sprintf("repoURL: %s filePath: %s branch: %s",
+		doc.RepositoryURL, doc.FilePath, doc.DefaultBranch)
+}
+
 // Implements the CrawlerDocument interface.
 func (doc *Document) WasCached() bool {
 	return doc.IsSame
@@ -47,6 +60,7 @@ func (doc *Document) FromRelativePath(newFile string) (Document, error) {
 			RepositoryURL: repoSpec.Host + path.Clean(repoSpec.OrgRepo),
 			FilePath:      path.Clean(repoSpec.Path),
 			DefaultBranch: repoSpec.Ref,
+			User:          UserName(repoSpec.Host + path.Clean(repoSpec.OrgRepo)),
 		}, nil
 	}
 	// else document is probably relative path.
@@ -54,6 +68,7 @@ func (doc *Document) FromRelativePath(newFile string) (Document, error) {
 	ret := Document{
 		RepositoryURL: doc.RepositoryURL,
 		DefaultBranch: doc.DefaultBranch,
+		User:          UserName(doc.RepositoryURL),
 	}
 	ogDir, _ := path.Split(doc.FilePath)
 
@@ -78,13 +93,7 @@ func (doc *Document) ID() string {
 }
 
 func (doc *Document) RepositoryFullName() string {
-	url := strings.TrimRight(doc.RepositoryURL, "/")
-
-	gitPrefix := "git@github.com:"
-	if strings.HasPrefix(url, gitPrefix) {
-		url = url[len(gitPrefix):]
-	}
-
+	url := TrimUrl(doc.RepositoryURL)
 	sections := strings.Split(url, "/")
 	l := len(sections)
 	if l < 2 {
@@ -92,3 +101,24 @@ func (doc *Document) RepositoryFullName() string {
 	}
 	return path.Join(sections[l-2], sections[l-1])
 }
+
+// TrimUrl removes all the trailing slashes and the "git@github.com:" prefix (if exists).
+func TrimUrl(s string) string {
+	url := strings.TrimRight(s, "/")
+
+	gitPrefix := "git@github.com:"
+	if strings.HasPrefix(url, gitPrefix) {
+		url = url[len(gitPrefix):]
+	}
+	return url
+}
+
+func UserName(repositoryURL string) string {
+	url := TrimUrl(repositoryURL)
+	sections := strings.Split(url, "/")
+	l := len(sections)
+	if l < 2 {
+		return url
+	}
+	return sections[l-2]
+}

api/internal/crawl/doc/docname_test.go

@@ -28,6 +28,7 @@ func TestFromRelativePath(t *testing.T) {
 						RepositoryURL: "example.com/repo",
 						FilePath:      "path/to/other/file/resource.yaml",
 						DefaultBranch: "master",
+						User:          "example.com",
 					},
 				},
 				{
@@ -36,6 +37,7 @@ func TestFromRelativePath(t *testing.T) {
 						RepositoryURL: "example.com/repo",
 						FilePath:      "path/to/other/file/patch.yaml",
 						DefaultBranch: "master",
+						User:          "example.com",
 					},
 				},
 				{
@@ -44,6 +46,7 @@ func TestFromRelativePath(t *testing.T) {
 						RepositoryURL: "example.com/repo",
 						FilePath:      "path/to/file/service.yaml",
 						DefaultBranch: "master",
+						User:          "example.com",
 					},
 				},
 			},
@@ -65,7 +68,7 @@ func TestFromRelativePath(t *testing.T) {
 
 func TestDocument_RepositoryFullName(t *testing.T) {
 	testCases := []struct {
-		doc Document
+		doc                        Document
 		expectedRepositoryFullName string
 	}{
 		{
@@ -108,4 +111,40 @@ func TestDocument_RepositoryFullName(t *testing.T) {
 				returnedRepositoryFullName)
 		}
 	}
-}
+}
+
+func TestDocument_UserName(t *testing.T) {
+	testCases := []struct {
+		repositoryURL    string
+		expectedUserName string
+	}{
+		{
+			repositoryURL:    "https://github.com/user/repo",
+			expectedUserName: "user",
+		},
+		{
+			repositoryURL:    "https://github.com//user/repo////",
+			expectedUserName: "user",
+		},
+		{
+			repositoryURL:    "repo/",
+			expectedUserName: "repo",
+		},
+		{
+			repositoryURL:    "",
+			expectedUserName: "",
+		},
+		{
+			repositoryURL:    "git@github.com:user/repo",
+			expectedUserName: "user",
+		},
+	}
+
+	for _, tc := range testCases {
+		returnedUserName := UserName(tc.repositoryURL)
+		if returnedUserName != tc.expectedUserName {
+			t.Errorf("UserName expected %s, got %s",
+				tc.expectedUserName, returnedUserName)
+		}
+	}
+}

api/internal/crawl/doc/unique_doc.go

@@ -0,0 +1,36 @@
+package doc
+
+import (
+	"sigs.k8s.io/kustomize/api/internal/crawl/utils"
+)
+
+// UniqueDocuments make sure a Document with a given ID appears only once
+type UniqueDocuments struct {
+	docs   []*Document
+	docIDs utils.SeenMap
+}
+
+func NewUniqueDocuments() UniqueDocuments {
+	return UniqueDocuments{
+		docs:   []*Document{},
+		docIDs: utils.NewSeenMap(),
+	}
+}
+
+func (uds *UniqueDocuments) Add(d *Document) {
+	if uds.docIDs.Seen(d.ID()) {
+		return
+	}
+	uds.docs = append(uds.docs, d)
+	uds.docIDs.Set(d.ID(), "")
+}
+
+func (uds *UniqueDocuments) AddDocuments(docs []*Document) {
+	for _, d := range docs {
+		uds.Add(d)
+	}
+}
+
+func (uds *UniqueDocuments) Documents() []*Document {
+	return uds.docs
+}

api/internal/crawl/index/elasticsearch.go

@@ -20,12 +20,18 @@ const IndexConfig = `
 				"repositoryUrl": {
 					"type": "keyword"
 				},
+				"user": {
+					"type": "keyword"
+				},
 				"filePath": {
 					"type": "keyword"
 				},
 				"defaultBranch": {
 					"type": "keyword"
 				},
+				"fileType": {
+					"type": "keyword"
+				},
 				"document": {
 					"type": "text"
 				},
@@ -87,7 +93,7 @@ func (idx *index) responseErrorOrNil(info string, res *esapi.Response,
 
 	defer res.Body.Close()
 	if res.IsError() {
-		return fmt.Errorf("%s: %s", messageStart, res.String())
+		return fmt.Errorf("%s: %s [%d]", messageStart, res.String(), res.StatusCode)
 	}
 
 	if reader != nil {

api/internal/crawl/index/kustomize.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"log"
 	"strings"
 	"time"
 
@@ -17,6 +18,7 @@ const (
 )
 
 type Mode int
+
 const (
 	InsertOrUpdate = iota
 	Delete
@@ -97,14 +99,14 @@ type KustomizeIndex struct {
 }
 
 // Create index reference to the index containing the kustomize documents.
-func NewKustomizeIndex(ctx context.Context) (*KustomizeIndex, error) {
-	idx, err := newIndex(ctx, "kustomize")
+func NewKustomizeIndex(ctx context.Context, indexName string) (*KustomizeIndex, error) {
+	idx, err := newIndex(ctx, indexName)
 	if err != nil {
 		return nil, err
 	}
 
 	indicesExistsOp := idx.client.Indices.Exists
-	resp, err := indicesExistsOp([]string{"kustomize"},
+	resp, err := indicesExistsOp([]string{indexName},
 		indicesExistsOp.WithContext(idx.ctx),
 		indicesExistsOp.WithPretty())
 	if err != nil {
@@ -112,9 +114,9 @@ func NewKustomizeIndex(ctx context.Context) (*KustomizeIndex, error) {
 	}
 
 	if resp.StatusCode == 200 {
-		fmt.Printf("The kustomize index already exists\n")
+		log.Printf("The %s index already exists", indexName)
 	} else {
-		fmt.Printf("Creating the kustomize index\n")
+		log.Printf("Creating the %s index\n", indexName)
 		if err := idx.CreateIndex([]byte(IndexConfig)); err != nil {
 			return nil, err
 		}
@@ -252,7 +254,7 @@ func (it *KustomizeIterator) Next() bool {
 	}
 
 	if it.err == nil {
-		fmt.Printf("updating scroll: %s\n", *it.scrollImpl.ScrollID)
+		log.Printf("updating scroll: %s\n", *it.scrollImpl.ScrollID)
 		it.err = it.update(*it.scrollImpl.ScrollID, reader)
 	}
 
@@ -268,7 +270,7 @@ func (it *KustomizeIterator) Value() KustomizeResult {
 	return it.scrollImpl
 }
 
-// Check if any errors have occured.
+// Check if any errors have occurred.
 func (it *KustomizeIterator) Err() error {
 	return it.err
 }
@@ -341,7 +343,7 @@ func (ki *KustomizeIndex) Search(query string,
 	if err != nil {
 		return nil, fmt.Errorf("failed to format query %s", query)
 	}
-	fmt.Printf("formated query: %s\n", data)
+	log.Printf("formated query: %s\n", data)
 
 	var kr ElasticKustomizeResult
 	err = ki.index.Search(data, opts.SearchOptions, func(results io.Reader) error {

api/internal/crawl/search_cmds/creationTime.md

@@ -1,6 +1,6 @@
 Find out the largest value of the `creationTime` field:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "aggs" : {
         "max_creationTime" : { "max" : { "field" : "creationTime" } }
@@ -11,7 +11,7 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 
 Find out the smallest value of the `creationTime` field:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "aggs" : {
         "min_creationTime" : { "min" : { "field" : "creationTime" } }
@@ -22,12 +22,12 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 
 Find out the smallest value of the `creationTime` field of all the kustomization files:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
       "filter": [
-        { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+        { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
       ]
     }
   },
@@ -40,13 +40,58 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 
 Find out the smallest value of the `creationTime` field of all kustomize resource files:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
       "must_not": {
-        "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }
-      }
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }, 
+      "filter": [
+        { "regexp": { "fileType": "resource"  }}
+      ]
+    }
+  },
+  "aggs" : {
+    "min_creationTime" : { "min" : { "field" : "creationTime" } }
+  }
+}
+'
+```
+
+Find out the smallest value of the `creationTime` field of all kustomize generator files:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }, 
+      "filter": [
+        { "regexp": { "fileType": "generator"  }}
+      ]
+    }
+  },
+  "aggs" : {
+    "min_creationTime" : { "min" : { "field" : "creationTime" } }
+  }
+}
+'
+```
+
+Find out the smallest value of the `creationTime` field of all kustomize transformer files:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }, 
+      "filter": [
+        { "regexp": { "fileType": "transformer"  }}
+      ]
     }
   },
   "aggs" : {
@@ -58,7 +103,7 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 
 Query all the documents whose `creationTime` <= `2016-07-29T17:38:26.000Z`:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "range": {
@@ -73,7 +118,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Query all the documents whose `creationTime` falls within the specific range:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "range": {
@@ -87,14 +132,38 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 '
 ```
 
+Query all the kustomization files whose `creationTime` falls within the specific range:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "size": 20,
+  "query": {
+    "bool": {
+      "filter": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }
+      },
+      "must": {
+        "range": {
+          "creationTime": {
+            "gte": "2017-09-24T15:49:57.000Z",
+            "lte": "2017-09-24T15:49:57.000Z"
+          }
+        }
+      }
+    }
+  }
+}
+'
+```
+
 Aggregate how many new kustomization files were added into Github each month:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
             "filter": [
-                { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
             ]
         }
     },
@@ -112,12 +181,67 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Conte
 
 Aggregate how many new kustomize resource files were added into Github each month:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
             "must_not": [
-                { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+            ],
+            "filter": [
+                { "regexp": { "fileType": "resource" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "newFiles_over_time" : {
+            "date_histogram" : {
+                "field" : "creationTime",
+                "interval" : "month"
+            }
+        }
+    }
+}
+'
+```
+
+Aggregate how many new kustomize generator files were added into Github each month:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+            ],
+            "filter": [
+                { "regexp": { "fileType": "generator" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "newFiles_over_time" : {
+            "date_histogram" : {
+                "field" : "creationTime",
+                "interval" : "month"
+            }
+        }
+    }
+}
+'
+```
+
+Aggregate how many new kustomize transformer files were added into Github each month:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+            ],
+            "filter": [
+                { "regexp": { "fileType": "transformer" }}
             ]
         }
     },
@@ -135,12 +259,12 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Conte
 
 Aggregate how many new kustomization files were added into Github each year:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
             "filter": [
-                { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
             ]
         }
     },
@@ -158,13 +282,16 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Conte
 
 Aggregate how many new kustomize resource files were added into Github each year:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
             "must_not": [
-                { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
-            ]
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+            ],
+            "filter": [
+                { "regexp": { "fileType": "resource" }}
+            ]            
         }
     },
     "aggs" : {
@@ -177,4 +304,108 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Conte
     }
 }
 '
+```
+
+Aggregate how many new kustomize generator files were added into Github each year:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+            ],
+            "filter": [
+                { "regexp": { "fileType": "generator" }}
+            ]            
+        }
+    },
+    "aggs" : {
+        "newFiles_over_time" : {
+            "date_histogram" : {
+                "field" : "creationTime",
+                "interval" : "year"
+            }
+        }
+    }
+}
+'
+```
+
+Aggregate how many new kustomize transformer files were added into Github each year:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+            ],
+            "filter": [
+                { "regexp": { "fileType": "transformer" }}
+            ]            
+        }
+    },
+    "aggs" : {
+        "newFiles_over_time" : {
+            "date_histogram" : {
+                "field" : "creationTime",
+                "interval" : "year"
+            }
+        }
+    }
+}
+'
+```
+
+Find the generator files created within the given time range:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "generator" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      },
+      "must": {
+        "range": {
+          "creationTime": {
+           "gte": "2019-04-26T16:40:02.000Z",
+           "lte": "2019-04-26T16:40:02.000Z"
+          }
+        }
+      }
+    }
+  }
+}
+'
+```
+
+Find the transformer files created within the given time range:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "transformer" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      },
+      "must": {
+        "range": {
+          "creationTime": {
+           "gte": "2019-04-26T16:40:02.000Z",
+           "lte": "2019-04-26T16:40:02.000Z"
+          }
+        }
+      }
+    }
+  }
+}
+'
 ```

api/internal/crawl/search_cmds/defaultBranch.md

@@ -1,6 +1,6 @@
 Count distinct values of the `defaultBranch` field:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "aggs" : {
         "defaultBranch_count" : {
@@ -17,7 +17,7 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 List all the github branches where kustomization files and kustomize resource files live, 
 and how many kustomization files and kustomize resource files live in each branch:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
     "aggs" : {
         "defaultBranch" : {

api/internal/crawl/search_cmds/fieldExistence.md

@@ -1,7 +1,7 @@
 Count the documents whose `document` field is empty (The reason why the `document` field
 of a document is empty is because of empty documents):
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
    "size": 10000,
     "query": {
@@ -19,7 +19,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Find all the documents having the `creationTime` field set:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "exists": {
@@ -32,7 +32,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Find all the documents whose `creationTime` field is not set:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
    "size": 10000,
     "query": {

api/internal/crawl/search_cmds/fileType.md

@@ -0,0 +1,301 @@
+Find all the documents having the `fileType` field set:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "exists": {
+            "field": "fileType"
+        }
+    }
+}
+'
+```
+
+Find all the documents whose `fileType` field is not set:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+   "size": 10000,
+    "query": {
+        "bool": {
+            "must_not": {
+                "exists": {
+                    "field": "fileType"
+                }
+            }
+        }
+    }
+}
+'
+```
+
+Search for all the documents whose `fileType` field is `resource`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "resource" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search for all the kustomization files whose `fileType` field is `resource`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}, 
+       { "regexp": { "fileType": "resource" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search for all the kustomize resource files:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "resource" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }
+    }
+  }
+}
+'
+```
+
+Search all the kustomization files including a `generators` field:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "size": 10000,
+  "query": {
+    "bool": {
+      "must": {
+        "match" : {
+          "identifiers" : {
+            "query" : "generators"
+          }
+        }
+      },
+      "filter": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }
+    }
+  }
+}
+'
+```
+
+Search for all the documents whose `fileType` field is `generator`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "generator" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search for all the kustomization files whose `fileType` field is `generator`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}, 
+       { "regexp": { "fileType": "generator" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search for all the kustomize generator files:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "generator" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }
+    }
+  }
+}
+'
+```
+
+Search all the kustomization files including a `transformers` field:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "size": 10000,
+  "query": {
+    "bool": {
+      "must": {
+        "match" : {
+          "identifiers" : {
+            "query" : "transformers"
+          }
+        }
+      },
+      "filter": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }
+    }
+  }
+}
+'
+```
+
+Search for all the documents whose `fileType` field is `transformer`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "transformer" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search for all the kustomization files whose `fileType` field is `transformer`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}, 
+       { "regexp": { "fileType": "transformer" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search for all the kustomize transformer files:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "transformer" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      }
+    }
+  }
+}
+'
+```
+
+Count distinct values of the `fileType` field:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "aggs" : {
+        "fileType_count" : {
+            "cardinality" : {
+                "field" : "fileType",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+List all the values of the `fileType` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "aggs" : {
+        "fileType" : {
+            "terms" : {
+              "field" : "fileType"
+            }
+        }
+    }
+}
+'
+```
+
+
+For all the kustomization files in the index, list all the values of the
+`fileType` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+             "filter": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+             ]
+        }
+    },
+    "aggs" : {
+        "fileType" : {
+            "terms" : {
+              "field" : "fileType"
+            }
+        }
+    }
+}
+'
+```
+
+For all the non-kustomization files in the index, list all the values of the
+`fileType` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            }
+        }
+    },
+    "aggs" : {
+        "fileType" : {
+            "terms" : {
+              "field" : "fileType"
+            }
+        }
+    }
+}
+'
+```

api/internal/crawl/search_cmds/generator.md

@@ -0,0 +1,29 @@
+Find all the generator files whose `kinds` field includes `ChartRenderer`, and
+only output certain fields of each document:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "size": 200,
+  "_source": {
+    "includes": ["kinds", "repositoryUrl", "defaultBranch", "filePath"]
+  },
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "generator" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      },
+      "must": {
+        "match" : {
+          "kinds" : {
+            "query" : "ChartRenderer"
+          }
+        }
+      }
+    }
+  }
+}
+'
+```

api/internal/crawl/search_cmds/id.md

@@ -0,0 +1,12 @@
+Find the document with the given `_id`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "terms": {
+      "_id": [ "b3a03f3327841617db696e2d6abc30e1a1bd653f1a2bbce05637f7dcae1a43f7" ] 
+    }
+  }
+}
+'
+```

api/internal/crawl/search_cmds/keyword_search.md

@@ -1,7 +1,7 @@
 Count the documents in the index whose `repositoryUrl` field starts with
 `https://github.com/`:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
@@ -17,7 +17,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 Count the documents in the index whose `repositoryUrl` field does not start with
 `https://github.com/`:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
@@ -33,7 +33,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 Search all the documents matching the given `repositoryUrl` and `filePath`, and return 
 a version for each search hit:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "size": 10000,
   "version": true,
@@ -52,12 +52,28 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 Search all the documents whose filePath ends with one of these following three filenames:
 `kustomization.yaml`, `kustomization.yml`, `kustomization`:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
       "filter": [
-       { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+       { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Search all the documents whose filePath does not end with any of these following
+three filenames: `kustomization.yaml`, `kustomization.yml`, `kustomization`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "must_not": [
+       { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
       ]
     }
   }

api/internal/crawl/search_cmds/misc.md

@@ -10,10 +10,23 @@ curl "${ElasticSearchURL}:9200/_cat/indices?v"
 
 Get the mapping of the index:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_mapping?pretty"
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_mapping?pretty"
 ```
 
 Delete the kustomize index from the ElasticSearch cluster (**Use this command with caution**):
 ```
-curl -X DELETE "${ElasticSearchURL}:9200/kustomize?pretty"
+curl -X DELETE "${ElasticSearchURL}:9200/${INDEXNAME}?pretty"
+```
+
+Add a new field into an existing index.
+```
+curl -X PUT "${ElasticSearchURL}:9200/${INDEXNAME}/_mapping/_doc?pretty" -H 'Content-Type: application/json' -d'
+{
+  "properties": {
+    "fileType": {
+      "type": "keyword"
+    }
+  }
+}
+'
 ```

api/internal/crawl/search_cmds/repositoryUrl.md

@@ -1,6 +1,6 @@
 Count distinct values of the `repositoryUrl` field:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "aggs" : {
         "repositoryUrl_count" : {
@@ -16,12 +16,12 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 
 Count how many Github repositories include kustomization files:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
              "filter": [
-                { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
              ]
         }
     },
@@ -37,16 +37,143 @@ curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Cont
 '
 ```
 
-Count how many Github repositories include kustomize resource files:
+Count distinct values of the `repositoryUrl` field for all the kustomize resource files in the index:
 ```
-curl -X POST "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
             "must_not": {
-                "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "resource" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "repositoryUrl_count" : {
+            "cardinality" : {
+                "field" : "repositoryUrl",
+                "precision_threshold": 40000
             }
         }
+    }
+}
+'
+```
+
+Count distinct values of the `repositoryUrl` field for all the kustomize generator files in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "generator" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "repositoryUrl_count" : {
+            "cardinality" : {
+                "field" : "repositoryUrl",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `repositoryUrl` field for all the kustomize transformer files in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "transformer" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "repositoryUrl_count" : {
+            "cardinality" : {
+                "field" : "repositoryUrl",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `repositoryUrl` field for all the kustomize resource dirs in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "resource" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
+    },
+    "aggs" : {
+        "repositoryUrl_count" : {
+            "cardinality" : {
+                "field" : "repositoryUrl",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `repositoryUrl` field for all the kustomize generator dirs in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "generator" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
+    },
+    "aggs" : {
+        "repositoryUrl_count" : {
+            "cardinality" : {
+                "field" : "repositoryUrl",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `repositoryUrl` field for all the kustomize transformer dirs in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "transformer" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
     },
     "aggs" : {
         "repositoryUrl_count" : {
@@ -64,7 +191,7 @@ List all the github repositories including kustomization files and kustomize res
 and how many kustomization files and kustomize resource files each github repository includes
 (the github repository including the most kustomization files is listed first):
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "aggs" : {
         "repositoryUrl" : {
@@ -80,12 +207,12 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Conte
 
 List the top 20 Github repositories including the most amount of kustomization files:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
              "filter": [
-                { "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }}
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }}
              ]
         }
     },
@@ -103,13 +230,16 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Conte
 
 List the top 20 Github repositories including the most amount of kustomize resource files:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
 {
     "query": {
         "bool": {
             "must_not": {
-                "regexp": { "filePath": ".*/kustomization((.yaml)?|(.yml)?)/*" }
-            }
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*" }
+            },
+            "filter": [
+                { "regexp": { "fileType": "resource" }}
+            ]
         }
     },
     "aggs" : {

api/internal/crawl/search_cmds/snapshot.md

@@ -0,0 +1,29 @@
+Retrieve information about all registered snapshot repositories:
+```
+curl -X GET "${ElasticSearchURL}:9200/_snapshot?pretty"
+```
+
+Retrieve information about a given snapshot repository, `kustomize-backup`:
+```
+curl -X GET "${ElasticSearchURL}:9200/_snapshot/kustomize-backup?pretty"
+```
+
+Verify a snapshot repository, `kustomize-backup`, manually:
+```
+curl -X POST "${ElasticSearchURL}:9200/_snapshot/kustomize-backup/_verify?pretty"
+```
+
+List all the snapshots in a given snapshot repository:
+```
+curl -X GET "${ElasticSearchURL}:9200/_cat/snapshots/kustomize-backup?v&s=id&pretty"
+```
+
+Retrieve a summary information about a given snapshot:
+```
+curl -X GET "${ElasticSearchURL}:9200/_snapshot/kustomize-backup/kustomize-snapshot?pretty"
+```
+
+Retrieve a detailed information about a given snapshot:
+```
+curl -X GET "${ElasticSearchURL}:9200/_snapshot/kustomize-backup/kustomize-snapshot/_status?pretty"
+```

api/internal/crawl/search_cmds/text_search.md

@@ -1,6 +1,6 @@
 Search for all the kustomize resource files including a Deployment object:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "match" : {
@@ -16,7 +16,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 Search for all the kustomize resource files including a Deployment object, but only
 including the `kinds` field in the result:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "_source": {
     "includes": ["kinds"]
@@ -35,7 +35,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 Search for all the kustomize resource files including both a Deployment object and 
 a Service object:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "match" : {
@@ -52,7 +52,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 Count the number of documents including Deployment and the number of documents 
 including Service:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "size": 0,
   "aggs" : {
@@ -71,7 +71,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Search for all the kustomization files involving CRDs:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "size": 10000,
   "query": {
@@ -87,7 +87,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Search for all the kustomization files defining configMapGenerator:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "size": 10000,
   "query": {
@@ -103,7 +103,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Search for all the documents having a `kind` field:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
@@ -118,7 +118,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Search for all the kuostmization files having a `kind` field:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "bool": {
@@ -134,7 +134,7 @@ curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type
 
 Search for all the kustomization files defining the `generatorOptions:disableNameSuffixHash` feature:
 ```
-curl -X GET "${ElasticSearchURL}:9200/kustomize/_search?pretty" -H 'Content-Type: application/json' -d'
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
 {
   "query": {
     "match" : {

api/internal/crawl/search_cmds/transformer.md

@@ -0,0 +1,29 @@
+Find all the trasnformer files whose `kinds` field includes `HelmValues`, and
+only output certain fields of each document:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "size": 200,
+  "_source": {
+    "includes": ["kinds", "repositoryUrl", "defaultBranch", "filePath"]
+  },
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "fileType": "transformer" }}
+      ],
+      "must_not": {
+        "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+      },
+      "must": {
+        "match" : {
+          "kinds" : {
+            "query" : "HelmValues"
+          }
+        }
+      }
+    }
+  }
+}
+'
+```

api/internal/crawl/search_cmds/user.md

@@ -0,0 +1,380 @@
+Find all the documents having the `user` field set:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "exists": {
+            "field": "user"
+        }
+    }
+}
+'
+```
+
+Find all the documents whose `user` field is not set:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+   "size": 10000,
+    "query": {
+        "bool": {
+            "must_not": {
+                "exists": {
+                    "field": "user"
+                }
+            }
+        }
+    }
+}
+'
+```
+
+Search for all the documents whose `user` field is `kubernetes-sigs`:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?pretty" -H 'Content-Type: application/json' -d'
+{
+  "query": {
+    "bool": {
+      "filter": [
+       { "regexp": { "user": "kubernetes-sigs" }}
+      ]
+    }
+  }
+}
+'
+```
+
+Count distinct values of the `user` field:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+List all the values of the `user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "aggs" : {
+        "user" : {
+            "terms" : {
+                "field" : "user",
+                "size" : 20
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `user` field for all the kustomization files in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+             "filter": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+             ]
+        }
+    },
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+For all the kustomization files in the index, list all the values of the
+`user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+             "filter": [
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+             ]
+        }
+    },
+    "aggs" : {
+        "user" : {
+            "terms" : {
+                "field" : "user",
+                "size": 20
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `user` field for all the kustomize resource files in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "resource" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+For all the kustomize resource files in the index, list all the values of the
+`user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "resource" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user" : {
+            "terms" : {
+                "field" : "user",
+                "size": 20
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `user` field for all the kustomize generator files in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "generator" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+For all the kustomize generator files in the index, list all the values of the
+`user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "generator" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user" : {
+            "terms" : {
+              "field" : "user",
+              "size": 20  
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `user` field for all the kustomize transformer files in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "transformer" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+For all the kustomize transformer files in the index, list all the values of the
+`user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "must_not": {
+                "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }
+            },
+            "filter": [
+                { "regexp": { "fileType": "transformer" }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user" : {
+            "terms" : {
+                "field" : "user",
+                "size": 20
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `user` field for all the kustomize generator dirs in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "generator" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+For all the kustomize generator dirs in the index, list all the values of the
+`user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "generator" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user" : {
+            "terms" : {
+              "field" : "user",
+              "size": 20  
+            }
+        }
+    }
+}
+'
+```
+
+Count distinct values of the `user` field for all the kustomize transformer dirs in the index:
+```
+curl -X POST "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "transformer" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user_count" : {
+            "cardinality" : {
+                "field" : "user",
+                "precision_threshold": 40000
+            }
+        }
+    }
+}
+'
+```
+
+For all the kustomize transformer dirs in the index, list all the values of the
+`user` field and the frequency of each value:
+```
+curl -X GET "${ElasticSearchURL}:9200/${INDEXNAME}/_search?size=0&pretty" -H 'Content-Type: application/json' -d'
+{
+    "query": {
+        "bool": {
+            "filter": [
+                { "regexp": { "fileType": "transformer" }},
+                { "regexp": { "filePath": "(.*/)?kustomization((.yaml)?|(.yml)?)(/)*"  }}
+            ]
+        }
+    },
+    "aggs" : {
+        "user" : {
+            "terms" : {
+              "field" : "user"
+            }
+        }
+    }
+}
+'
+```

api/internal/crawl/utils/utils.go

@@ -0,0 +1,21 @@
+package utils
+
+type SeenMap map[string]string
+
+func (seen SeenMap) Seen(item string) bool {
+	_, ok := seen[item]
+	return ok
+}
+
+func (seen SeenMap) Set(k, v string) {
+	seen[k] = v
+}
+
+// The caller should make sure that key is in the map.
+func (seen SeenMap) Value(k string) string {
+	return seen[k]
+}
+
+func NewSeenMap() SeenMap {
+	return make(map[string]string)
+}

api/internal/git/cloner.go

@@ -27,90 +27,28 @@ func ClonerUsingGitExec(repoSpec *RepoSpec) error {
 	if err != nil {
 		return err
 	}
+
+	if repoSpec.Ref == "" {
+		repoSpec.Ref = "master"
+	}
 	cmd := exec.Command(
 		gitProgram,
-		"init",
+		"clone",
+		"--depth=1",
+		repoSpec.CloneSpec(),
+		"-b",
+		repoSpec.Ref,
 		repoSpec.Dir.String())
 	var out bytes.Buffer
 	cmd.Stdout = &out
 	cmd.Stderr = &out
 	err = cmd.Run()
 	if err != nil {
-		log.Printf("Error initializing empty git repo: %s", out.String())
+		log.Printf("Error cloning git repo: %s", out.String())
 		return errors.Wrapf(
 			err,
-			"trouble initializing empty git repo in %s",
-			repoSpec.Dir.String())
-	}
-
-	cmd = exec.Command(
-		gitProgram,
-		"remote",
-		"add",
-		"origin",
-		repoSpec.CloneSpec())
-	cmd.Stdout = &out
-	cmd.Stderr = &out
-	cmd.Dir = repoSpec.Dir.String()
-	err = cmd.Run()
-	if err != nil {
-		log.Printf("Error setting git remote: %s", out.String())
-		return errors.Wrapf(
-			err,
-			"trouble adding remote %s",
-			repoSpec.CloneSpec())
-	}
-	if repoSpec.Ref == "" {
-		repoSpec.Ref = "master"
-	}
-	cmd = exec.Command(
-		gitProgram,
-		"fetch",
-		"--depth=1",
-		"origin",
-		repoSpec.Ref)
-	cmd.Stdout = &out
-	cmd.Stderr = &out
-	cmd.Dir = repoSpec.Dir.String()
-	err = cmd.Run()
-	if err != nil {
-		cmd = exec.Command(
-			gitProgram,
-			"pull",
-			"origin",
-			"master")
-		var out bytes.Buffer
-		cmd.Stdout = &out
-		cmd.Dir = repoSpec.Dir.String()
-		err := cmd.Run()
-		if err != nil {
-			return errors.Wrapf(err, "trouble pulling %s", repoSpec.OrgRepo)
-		}
-		if repoSpec.Ref == "" {
-			repoSpec.Ref = "master"
-		}
-		cmd = exec.Command(gitProgram, "checkout", repoSpec.Ref)
-		cmd.Dir = repoSpec.Dir.String()
-		err = cmd.Run()
-		if err != nil {
-			return errors.Wrapf(
-				err, "trouble checking out href %s", repoSpec.Ref)
-		}
-	}
-
-	cmd = exec.Command(
-		gitProgram,
-		"reset",
-		"--hard",
-		"FETCH_HEAD")
-	cmd.Stdout = &out
-	cmd.Stderr = &out
-	cmd.Dir = repoSpec.Dir.String()
-	err = cmd.Run()
-	if err != nil {
-		log.Printf("Error performing git reset: %s", out.String())
-		return errors.Wrapf(
-			err, "trouble hard resetting empty repository to %s", repoSpec.Ref)
+			"trouble cloning git repo %v in %s",
+			repoSpec.CloneSpec(), repoSpec.Dir.String())
 	}
 
 	cmd = exec.Command(
@@ -120,10 +58,11 @@ func ClonerUsingGitExec(repoSpec *RepoSpec) error {
 		"--init",
 		"--recursive")
 	cmd.Stdout = &out
+	cmd.Stderr = &out
 	cmd.Dir = repoSpec.Dir.String()
 	err = cmd.Run()
 	if err != nil {
-		return errors.Wrapf(err, "trouble fetching submodules for %s", repoSpec.Ref)
+		return errors.Wrapf(err, "trouble fetching submodules for %s", repoSpec.CloneSpec())
 	}
 
 	return nil

api/internal/tools/tools.go

@@ -4,7 +4,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 // This file exists to automatically trigger installs
-// of the given tools, and is the offical 'unofficial'
+// of the given tools, and is the official 'unofficial'
 // way to declare a dependence on a Go binary until
 // some better technique comes along.
 

api/krusty/baseandoverlaymedium_test.go

@@ -153,7 +153,8 @@ FRUIT=banana
 LEGUME=chickpea
 `)
 	th.WriteF("/app/overlay/configmap/dummy.txt",
-		`Lorem ipsum dolor sit amet, consectetur  
+		`Lorem ipsum dolor sit amet, consectetur
+ 		 
 adipiscing elit, sed do eiusmod tempor		
 incididunt ut labore et dolore magna aliqua.   
 `)
@@ -294,6 +295,7 @@ apiVersion: v1
 data:
   nonsense: |
     Lorem ipsum dolor sit amet, consectetur
+
     adipiscing elit, sed do eiusmod tempor
     incididunt ut labore et dolore magna aliqua.
 kind: ConfigMap
@@ -304,6 +306,6 @@ metadata:
     app: mungebot
     org: kubernetes
     repo: test-infra
-  name: test-infra-app-config-4mt28b5bg2
+  name: test-infra-app-config-hh272bg5d4
 `)
 }

api/kv/kv.go

@@ -93,7 +93,7 @@ func (kvl *loader) keyValuesFromFileSources(sources []string) ([]types.Pair, err
 
 // trimTrailingSpacesInLines takes string with multiple lines and trims the trailing white spaces and tabs from each line.
 func trimTrailingSpacesInLines(str string) string {
-	re := regexp.MustCompile(`\s*\n`)
+	re := regexp.MustCompile(`[ \t]*\n`)
 	return re.ReplaceAllString(str, "\n")
 }
 

api/kv/kv_test.go

@@ -97,8 +97,8 @@ func TestKeyValuesFromFileSources(t *testing.T) {
 }
 
 func TestTrimTrailingSpacesInLines(t *testing.T) {
-	input := "\"fooKey\": \"fooValue\"   \t\n\t\"barKey\": \"barValue\""
-	expected := "\"fooKey\": \"fooValue\"\n\t\"barKey\": \"barValue\""
+	input := "\"fooKey\": \"fooValue\"   \t\n \t\t  \n\t\"barKey\": \"barValue\""
+	expected := "\"fooKey\": \"fooValue\"\n\n\t\"barKey\": \"barValue\""
 	res := trimTrailingSpacesInLines(input)
 	if !reflect.DeepEqual(res, expected) {
 		t.Errorf("Trim trailing spaces in lines should succeed, got: %s exptected: %s", res, expected)

cmd/config/.golangci.yml

@@ -23,7 +23,7 @@ linters:
     - gofmt
     - goimports
 #    - golint
-    - gosec
+#    - gosec
     - gosimple
     - govet
     - ineffassign

cmd/config/configcobra/cmds.go

@@ -43,6 +43,29 @@ Advanced Documentation Topics:
 `,
 }
 
+// Export commands publicly for composition
+var (
+	Annotate     = commands.AnnotateCommand
+	Cat          = commands.CatCommand
+	Count        = commands.CountCommand
+	CreateSetter = commands.CreateSetterCommand
+	Fmt          = commands.FmtCommand
+	Grep         = commands.GrepCommand
+	ListSetters  = commands.ListSettersCommand
+	Merge        = commands.MergeCommand
+	Merge3       = commands.Merge3Command
+	RunFn        = commands.RunFnCommand
+	Set          = commands.SetCommand
+	Sink         = commands.SinkCommand
+	Source       = commands.SourceCommand
+	Tree         = commands.TreeCommand
+	Wrap         = commands.WrapCommand
+	XArgs        = commands.XArgsCommand
+
+	StackOnError = &commands.StackOnError
+	ExitOnError  = &commands.ExitOnError
+)
+
 // NewConfigCommand returns a new *cobra.Command for the config command group.  This may
 // be embedded into other go binaries as a way of packaging the "config" command as part
 // of another binary.
@@ -69,6 +92,7 @@ func NewConfigCommand(name string) *cobra.Command {
 
 	name = strings.TrimSpace(name + " config")
 	commands.ExitOnError = true
+	root.AddCommand(commands.AnnotateCommand(name))
 	root.AddCommand(commands.GrepCommand(name))
 	root.AddCommand(commands.TreeCommand(name))
 	root.AddCommand(commands.CatCommand(name))
@@ -77,6 +101,9 @@ func NewConfigCommand(name string) *cobra.Command {
 	root.AddCommand(commands.Merge3Command(name))
 	root.AddCommand(commands.CountCommand(name))
 	root.AddCommand(commands.RunFnCommand(name))
+	root.AddCommand(commands.XArgsCommand())
+	root.AddCommand(commands.WrapCommand())
+
 	root.AddCommand(commands.SetCommand(name))
 	root.AddCommand(commands.ListSettersCommand(name))
 	root.AddCommand(commands.CreateSetterCommand(name))

cmd/config/docs/api-conventions/config-io.md

@@ -29,7 +29,7 @@ metadata:
 ### `config.kubernetes.io/index`
 
 Records the index of a Resource in file. In a multi-object YAML file, Resources are separated
-by three dashes (`---`), and the index represents the positon of the Resource starting from zero.
+by three dashes (`---`), and the index represents the position of the Resource starting from zero.
 
 This annotation **SHOULD** be set when reading Resources from files.
 It **SHOULD** be unset when writing Resources to files.

cmd/config/docs/api-conventions/functions-impl.md

@@ -129,7 +129,7 @@ spec:
 
 ### Output
 
-The function is invoked using by runing `kustomize config run dir/`.
+The function is invoked using byrunning `kustomize config run dir/`.
 
 `dir/my-instance_deployment.yaml` contains the Deployment:
 

cmd/config/docs/commands/annotate.md

@@ -0,0 +1,18 @@
+## annotate
+
+[Alpha] Set an annotation on Resources.
+
+### Synopsis
+
+[Alpha]  Set an annotation on Resources.
+
+  DIR:
+    Path to local directory.
+
+### Examples
+
+    kustomize config annotate my-dir/ --kv foo=bar
+
+    kustomize config annotate my-dir/ --kv foo=bar --kv a=b
+
+    kustomize config annotate my-dir/ --kv foo=bar --kind Deployment --name foo

cmd/config/docs/commands/sink.md

@@ -6,10 +6,10 @@
 
 [Alpha] Implement a Sink by writing input to a local directory.
 
-    kustomize config sink DIR
+    kustomize config sink [DIR]
 
   DIR:
-    Path to local directory.
+    Path to local directory.  If unspecified, sink will write to stdout as if it were a single file.
 
 `sink` writes its input to a directory
 

cmd/config/docs/commands/source.md

@@ -6,10 +6,11 @@
 
 [Alpha] Implement a Source by reading a local directory.
 
-    kustomize config source DIR
+    kustomize config source DIR...
 
   DIR:
-    Path to local directory.
+    One or more paths to local directories.  Contents from directories will be concatenated.
+    If no directories are provided, source will read from stdin as if it were a single file.
 
 `source` emits configuration to act as input to a function
 

cmd/config/go.mod

@@ -10,7 +10,5 @@ require (
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.4.0
 	k8s.io/apimachinery v0.17.0
-	sigs.k8s.io/kustomize/kyaml v0.0.0
+	sigs.k8s.io/kustomize/kyaml v0.0.11
 )
-
-replace sigs.k8s.io/kustomize/kyaml v0.0.0 => ../../kyaml

cmd/config/go.sum

@@ -164,5 +164,7 @@ k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
+sigs.k8s.io/kustomize/kyaml v0.0.11 h1:2ZzpHdFgBt056/Aqo3G5/ZujYN5Ihc9TUWICI+0AbJo=
+sigs.k8s.io/kustomize/kyaml v0.0.11/go.mod h1:tDOfJjL6slQVBLHJ76XfXAFgAOEdfm04AW2HehYOp8k=
 sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=

cmd/config/internal/commands/annotate.go

@@ -0,0 +1,103 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package commands
+
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
+	"sigs.k8s.io/kustomize/kyaml/errors"
+	"sigs.k8s.io/kustomize/kyaml/kio"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+// NewAnnotateRunner returns a command runner.
+func NewAnnotateRunner(parent string) *AnnotateRunner {
+	r := &AnnotateRunner{}
+	c := &cobra.Command{
+		Use:     "annotate [DIR]",
+		Args:    cobra.MaximumNArgs(1),
+		Short:   commands.AnnotateShort,
+		Long:    commands.AnnotateLong,
+		Example: commands.AnnotateExamples,
+		RunE:    r.runE,
+	}
+	fixDocs(parent, c)
+	r.Command = c
+	c.Flags().StringVar(&r.Kind, "kind", "", "Resource kind to annotate")
+	c.Flags().StringVar(&r.ApiVersion, "apiVersion", "", "Resource apiVersion to annotate")
+	c.Flags().StringVar(&r.Name, "name", "", "Resource name to annotate")
+	c.Flags().StringVar(&r.Namespace, "namespace", "", "Resource namespace to annotate")
+	c.Flags().StringSliceVar(&r.Values, "kv", []string{}, "annotation as KEY=VALUE")
+	return r
+}
+
+func AnnotateCommand(parent string) *cobra.Command {
+	return NewAnnotateRunner(parent).Command
+}
+
+type AnnotateRunner struct {
+	Command    *cobra.Command
+	Values     []string
+	Kind       string
+	Name       string
+	ApiVersion string
+	Namespace  string
+	Path       string
+}
+
+func (r *AnnotateRunner) runE(c *cobra.Command, args []string) error {
+	var input []kio.Reader
+	var output []kio.Writer
+	if len(args) == 0 {
+		rw := &kio.ByteReadWriter{Reader: c.InOrStdin(), Writer: c.OutOrStdout()}
+		input = []kio.Reader{rw}
+		output = []kio.Writer{rw}
+	} else {
+		rw := &kio.LocalPackageReadWriter{PackagePath: args[0], NoDeleteFiles: true}
+		input = []kio.Reader{rw}
+		output = []kio.Writer{rw}
+	}
+	return handleError(c, kio.Pipeline{
+		Inputs:  input,
+		Filters: []kio.Filter{r},
+		Outputs: output,
+	}.Execute())
+}
+
+func (r *AnnotateRunner) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
+	for i := range nodes {
+		n := nodes[i]
+		m, err := n.GetMeta()
+		if err != nil {
+			return nil, err
+		}
+		if r.Kind != "" && r.Kind != m.Kind {
+			continue
+		}
+		if r.ApiVersion != "" && r.ApiVersion != m.APIVersion {
+			continue
+		}
+		if r.Namespace != "" && r.Namespace != m.Namespace {
+			continue
+		}
+		if r.Name != "" && r.Name != m.Name {
+			continue
+		}
+
+		for i := range r.Values {
+			// split key, value pairs
+			kv := strings.SplitN(r.Values[i], "=", 2)
+			if len(kv) != 2 {
+				return nil, errors.Errorf("must specify --kv as KEY=VALUE: %s", r.Values[i])
+			}
+			if err := n.PipeE(yaml.SetAnnotation(kv[0], kv[1])); err != nil {
+				return nil, err
+			}
+		}
+
+	}
+	return nodes, nil
+}

cmd/config/internal/commands/annotate_test.go

@@ -0,0 +1,488 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package commands
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/kyaml/kio"
+)
+
+func TestAnnotateCommand(t *testing.T) {
+	var tests = []struct {
+		name     string
+		args     []string
+		expected string
+	}{
+		{
+			name:     "single value",
+			args:     []string{"--kv", "a=b"},
+			expected: expectedSingleValue,
+		},
+		{
+			name:     "multi value",
+			args:     []string{"--kv", "a=b", "--kv", "c=d"},
+			expected: expectedMultiValue,
+		},
+		{
+			name:     "filter kind",
+			args:     []string{"--kv", "a=b", "--kind", "Service"},
+			expected: expectedFilterKindService,
+		},
+		{
+			name:     "filter apiVersion",
+			args:     []string{"--kv", "a=b", "--apiVersion", "v1"},
+			expected: expectedFilterApiVersionV1,
+		},
+		{
+			name:     "filter name",
+			args:     []string{"--kv", "a=b", "--name", "bar"},
+			expected: expectedFilterNameBar,
+		},
+		{
+			name:     "filter namespace",
+			args:     []string{"--kv", "a=b", "--namespace", "bar"},
+			expected: expectedFilterNamespaceBar,
+		},
+	}
+	for i := range tests {
+		tt := tests[i]
+		t.Run(tt.name, func(t *testing.T) {
+			d := initTestDir(t)
+			defer os.RemoveAll(d)
+
+			a := NewAnnotateRunner("")
+			a.Command.SetArgs(append([]string{d}, tt.args...))
+			a.Command.SilenceUsage = true
+			a.Command.SilenceErrors = true
+
+			err := a.Command.Execute()
+			if !assert.NoError(t, err) {
+				t.FailNow()
+			}
+
+			actual := &bytes.Buffer{}
+			err = kio.Pipeline{
+				Inputs:  []kio.Reader{kio.LocalPackageReader{PackagePath: d}},
+				Outputs: []kio.Writer{kio.ByteWriter{Writer: actual, KeepReaderAnnotations: true}},
+			}.Execute()
+			if !assert.NoError(t, err) {
+				t.FailNow()
+			}
+			if !assert.Equal(t,
+				strings.TrimSpace(tt.expected),
+				strings.TrimSpace(actual.String())) {
+				t.FailNow()
+			}
+		})
+	}
+}
+
+func initTestDir(t *testing.T) string {
+	d, err := ioutil.TempDir("", "kustomize-annotate-test")
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+	err = ioutil.WriteFile(filepath.Join(d, "f1.yaml"), []byte(f1Input), 0600)
+	if !assert.NoError(t, err) {
+		defer os.RemoveAll(d)
+		t.FailNow()
+	}
+	err = ioutil.WriteFile(filepath.Join(d, "f2.yaml"), []byte(f2Input), 0600)
+	if !assert.NoError(t, err) {
+		defer os.RemoveAll(d)
+		t.FailNow()
+	}
+	return d
+}
+
+var (
+	f1Input = `
+kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+spec:
+  selector:
+    app: nginx
+`
+
+	f2Input = `
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+  namespace: foo
+spec:
+  replicas: 3
+`
+
+	expectedSingleValue = `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+    a: 'b'
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+    a: 'b'
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    a: 'b'
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+    a: 'b'
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: foo
+spec:
+  replicas: 3
+`
+
+	expectedMultiValue = `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+    a: 'b'
+    c: 'd'
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+    a: 'b'
+    c: 'd'
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    a: 'b'
+    c: 'd'
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+    a: 'b'
+    c: 'd'
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: foo
+spec:
+  replicas: 3
+`
+
+	expectedFilterKindService = `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+    a: 'b'
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: foo
+spec:
+  replicas: 3
+`
+
+	expectedFilterApiVersionV1 = `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    a: 'b'
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: foo
+spec:
+  replicas: 3
+`
+
+	expectedFilterNameBar = `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+    a: 'b'
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: foo
+spec:
+  replicas: 3
+`
+
+	expectedFilterNamespaceBar = `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f1.yaml'
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  configFn:
+    container:
+      image: gcr.io/example/reconciler:v1
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    a: 'b'
+    config.kubernetes.io/index: '0'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: bar
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+    config.kubernetes.io/index: '1'
+    config.kubernetes.io/path: 'f2.yaml'
+  namespace: foo
+spec:
+  replicas: 3
+`
+)

cmd/config/internal/commands/cmdcreatesetter.go

@@ -38,7 +38,6 @@ func NewCreateSetterRunner(parent string) *CreateSetterRunner {
 		"create a partial setter for only part of the field value.")
 	fixDocs(parent, set)
 	set.MarkFlagRequired("type")
-	set.MarkFlagRequired("field")
 	r.Command = set
 	return r
 }

cmd/config/internal/commands/fmt.go

@@ -31,6 +31,8 @@ formatting substitution verbs {'%n': 'metadata.name', '%s': 'metadata.namespace'
 		`if true, keep index and filename annotations set on Resources.`)
 	c.Flags().BoolVar(&r.Override, "override", false,
 		`if true, override existing filepath annotations.`)
+	c.Flags().BoolVar(&r.UseSchema, "use-schema", false,
+		`if true, uses openapi resource schema to format resources.`)
 	r.Command = c
 	return r
 }
@@ -46,6 +48,7 @@ type FmtRunner struct {
 	SetFilenames    bool
 	KeepAnnotations bool
 	Override        bool
+	UseSchema       bool
 }
 
 func (r *FmtRunner) preRunE(c *cobra.Command, args []string) error {
@@ -56,7 +59,9 @@ func (r *FmtRunner) preRunE(c *cobra.Command, args []string) error {
 }
 
 func (r *FmtRunner) runE(c *cobra.Command, args []string) error {
-	f := []kio.Filter{filters.FormatFilter{}}
+	f := []kio.Filter{filters.FormatFilter{
+		UseSchema: r.UseSchema,
+	}}
 
 	// format with file names
 	if r.SetFilenames {

cmd/config/internal/commands/merge3.go

@@ -25,6 +25,8 @@ func GetMerge3Runner(name string) *Merge3Runner {
 		"Path to updated package")
 	c.Flags().StringVar(&r.toDir, "to", "",
 		"Path to destination package")
+	c.Flags().BoolVar(&r.path, "path-merge-key", false,
+		"Use the path as part of the merge key when merging resources")
 
 	r.Command = c
 	return r
@@ -40,6 +42,7 @@ type Merge3Runner struct {
 	ancestor string
 	fromDir  string
 	toDir    string
+	path     bool
 }
 
 func (r *Merge3Runner) runE(c *cobra.Command, args []string) error {
@@ -47,6 +50,7 @@ func (r *Merge3Runner) runE(c *cobra.Command, args []string) error {
 		OriginalPath: r.ancestor,
 		UpdatedPath:  r.fromDir,
 		DestPath:     r.toDir,
+		MergeOnPath:  r.path,
 	}.Merge()
 	if err != nil {
 		return err

cmd/config/internal/commands/run-fns.go

@@ -4,22 +4,27 @@
 package commands
 
 import (
+	"fmt"
+	"io"
+	"strings"
+
 	"github.com/spf13/cobra"
 	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
+	"sigs.k8s.io/kustomize/kyaml/errors"
 	"sigs.k8s.io/kustomize/kyaml/runfn"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
 
 // GetCatRunner returns a RunFnRunner.
 func GetRunFnRunner(name string) *RunFnRunner {
 	r := &RunFnRunner{}
 	c := &cobra.Command{
-		Use:     "run DIR",
-		Aliases: []string{"run-fns"},
+		Use:     "run [DIR]",
 		Short:   commands.RunFnsShort,
 		Long:    commands.RunFnsLong,
 		Example: commands.RunFnsExamples,
 		RunE:    r.runE,
-		Args:    cobra.ExactArgs(1),
+		PreRunE: r.preRunE,
 	}
 	fixDocs(name, c)
 	c.Flags().BoolVar(&r.IncludeSubpackages, "include-subpackages", true,
@@ -27,11 +32,14 @@ func GetRunFnRunner(name string) *RunFnRunner {
 	r.Command = c
 	r.Command.Flags().BoolVar(
 		&r.DryRun, "dry-run", false, "print results to stdout")
+	r.Command.Flags().BoolVar(
+		&r.GlobalScope, "global-scope", false, "set global scope for functions.")
 	r.Command.Flags().StringSliceVar(
 		&r.FnPaths, "fn-path", []string{},
-		"directories containing functions without configuration")
-	r.Command.AddCommand(XArgsCommand())
-	r.Command.AddCommand(WrapCommand())
+		"read functions from these directories instead of the configuration directory.")
+	r.Command.Flags().StringVar(
+		&r.Image, "image", "",
+		"run this image as a function instead of discovering them.")
 	return r
 }
 
@@ -44,13 +52,144 @@ type RunFnRunner struct {
 	IncludeSubpackages bool
 	Command            *cobra.Command
 	DryRun             bool
+	GlobalScope        bool
 	FnPaths            []string
+	Image              string
+	RunFns             runfn.RunFns
 }
 
 func (r *RunFnRunner) runE(c *cobra.Command, args []string) error {
-	rec := runfn.RunFns{Path: args[0], FunctionPaths: r.FnPaths}
-	if r.DryRun {
-		rec.Output = c.OutOrStdout()
-	}
-	return handleError(c, rec.Execute())
+	return handleError(c, r.RunFns.Execute())
+}
+
+// getFunctions parses the commandline flags and arguments into explicit
+// Functions to run.
+func (r *RunFnRunner) getFunctions(c *cobra.Command, args, dataItems []string) (
+	[]*yaml.RNode, error) {
+	// if image isn't specified, then Functions is empty
+	if r.Image == "" {
+		return nil, nil
+	}
+
+	// create the function spec to set as an annotation
+	fn, err := yaml.Parse(`container: {}`)
+	if err != nil {
+		return nil, err
+	}
+	// TODO: add support network, volumes, etc based on flag values
+	err = fn.PipeE(
+		yaml.Lookup("container"),
+		yaml.SetField("image", yaml.NewScalarRNode(r.Image)))
+	if err != nil {
+		return nil, err
+	}
+
+	// create the function config
+	rc, err := yaml.Parse(`
+metadata:
+  name: function-input
+data: {}
+`)
+	if err != nil {
+		return nil, err
+	}
+
+	// set the function annotation on the function config so it
+	// is parsed by RunFns
+	value, err := fn.String()
+	if err != nil {
+		return nil, err
+	}
+	err = rc.PipeE(
+		yaml.LookupCreate(yaml.MappingNode, "metadata", "annotations"),
+		yaml.SetField("config.kubernetes.io/function", yaml.NewScalarRNode(value)))
+	if err != nil {
+		return nil, err
+	}
+
+	// default the function config kind to ConfigMap, this may be overridden
+	var kind = "ConfigMap"
+	var version = "v1"
+
+	// populate the function config with data.  this is a convention for functions
+	// to be more commandline friendly
+	if len(dataItems) > 0 {
+		dataField, err := rc.Pipe(yaml.Lookup("data"))
+		if err != nil {
+			return nil, err
+		}
+		for i, s := range dataItems {
+			kv := strings.SplitN(s, "=", 2)
+			if i == 0 && len(kv) == 1 {
+				// first argument may be the kind
+				kind = s
+				continue
+			}
+			if len(kv) != 2 {
+				return nil, fmt.Errorf("args must have keys and values separated by =")
+			}
+			err := dataField.PipeE(yaml.SetField(kv[0], yaml.NewScalarRNode(kv[1])))
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	err = rc.PipeE(yaml.SetField("kind", yaml.NewScalarRNode(kind)))
+	if err != nil {
+		return nil, err
+	}
+	err = rc.PipeE(yaml.SetField("apiVersion", yaml.NewScalarRNode(version)))
+	if err != nil {
+		return nil, err
+	}
+	return []*yaml.RNode{rc}, nil
+}
+
+func (r *RunFnRunner) preRunE(c *cobra.Command, args []string) error {
+	if c.ArgsLenAtDash() >= 0 && r.Image == "" {
+		return errors.Errorf("must specify --image")
+	}
+
+	var dataItems []string
+	if c.ArgsLenAtDash() >= 0 {
+		dataItems = args[c.ArgsLenAtDash():]
+		args = args[:c.ArgsLenAtDash()]
+	}
+	if len(args) > 1 {
+		return errors.Errorf("0 or 1 arguments supported, function arguments go after '--'")
+	}
+
+	fns, err := r.getFunctions(c, args, dataItems)
+	if err != nil {
+		return err
+	}
+
+	// set the output to stdout if in dry-run mode or no arguments are specified
+	var output io.Writer
+	var input io.Reader
+	if len(args) == 0 {
+		output = c.OutOrStdout()
+		input = c.InOrStdin()
+	} else if r.DryRun {
+		output = c.OutOrStdout()
+	}
+
+	// set the path if specified as an argument
+	var path string
+	if len(args) == 1 {
+		// argument is the directory
+		path = args[0]
+	}
+
+	r.RunFns = runfn.RunFns{
+		FunctionPaths: r.FnPaths,
+		GlobalScope:   r.GlobalScope,
+		Functions:     fns,
+		Output:        output,
+		Input:         input,
+		Path:          path,
+	}
+
+	// don't consider args for the function
+	return nil
 }

cmd/config/internal/commands/run_test.go

@@ -0,0 +1,232 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package commands
+
+import (
+	"io"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/assert"
+)
+
+// TestRunFnCommand_preRunE verifies that preRunE correctly parses the commandline
+// flags and arguments into the RunFns structure to be executed.
+func TestRunFnCommand_preRunE(t *testing.T) {
+	tests := []struct {
+		name          string
+		args          []string
+		expected      string
+		err           string
+		path          string
+		input         io.Reader
+		output        io.Writer
+		functionPaths []string
+	}{
+		{
+			name: "config map",
+			args: []string{"run", "dir", "--image", "foo:bar", "--", "a=b", "c=d", "e=f"},
+			path: "dir",
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {a: b, c: d, e: f}
+kind: ConfigMap
+apiVersion: v1
+`,
+		},
+		{
+			name:   "config map stdin / stdout",
+			args:   []string{"run", "--image", "foo:bar", "--", "a=b", "c=d", "e=f"},
+			input:  os.Stdin,
+			output: os.Stdout,
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {a: b, c: d, e: f}
+kind: ConfigMap
+apiVersion: v1
+`,
+		},
+		{
+			name:   "config map dry-run",
+			args:   []string{"run", "dir", "--image", "foo:bar", "--dry-run", "--", "a=b", "c=d", "e=f"},
+			output: os.Stdout,
+			path:   "dir",
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {a: b, c: d, e: f}
+kind: ConfigMap
+apiVersion: v1
+`,
+		},
+		{
+			name: "config map no args",
+			args: []string{"run", "dir", "--image", "foo:bar"},
+			path: "dir",
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {}
+kind: ConfigMap
+apiVersion: v1
+`,
+		},
+		{
+			name: "custom kind",
+			args: []string{"run", "dir", "--image", "foo:bar", "--", "Foo", "g=h"},
+			path: "dir",
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {g: h}
+kind: Foo
+apiVersion: v1
+`,
+		},
+		{
+			name: "custom kind '=' in data",
+			args: []string{"run", "dir", "--image", "foo:bar", "--", "Foo", "g=h", "i=j=k"},
+			path: "dir",
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {g: h, i: j=k}
+kind: Foo
+apiVersion: v1
+`,
+		},
+		{
+			name:          "function paths",
+			args:          []string{"run", "dir", "--fn-path", "path1", "--fn-path", "path2"},
+			path:          "dir",
+			functionPaths: []string{"path1", "path2"},
+		},
+		{
+			name: "custom kind with function paths",
+			args: []string{
+				"run", "dir", "--fn-path", "path", "--image", "foo:bar", "--", "Foo", "g=h", "i=j=k"},
+			path:          "dir",
+			functionPaths: []string{"path"},
+			expected: `
+metadata:
+  name: function-input
+  annotations:
+    config.kubernetes.io/function: |
+      container: {image: 'foo:bar'}
+data: {g: h, i: j=k}
+kind: Foo
+apiVersion: v1
+`,
+		},
+		{
+			name: "config map multi args",
+			args: []string{"run", "dir", "dir2", "--image", "foo:bar", "--", "a=b", "c=d", "e=f"},
+			err:  "0 or 1 arguments supported",
+		},
+		{
+			name: "config map not image",
+			args: []string{"run", "dir", "--", "a=b", "c=d", "e=f"},
+			err:  "must specify --image",
+		},
+		{
+			name: "config map bad data",
+			args: []string{"run", "dir", "--image", "foo:bar", "--", "a=b", "c", "e=f"},
+			err:  "must have keys and values separated by",
+		},
+	}
+
+	for i := range tests {
+		tt := tests[i]
+		t.Run(tt.name, func(t *testing.T) {
+			r := GetRunFnRunner("kustomize")
+			// Don't run the actual command
+			r.Command.Run = nil
+			r.Command.RunE = func(cmd *cobra.Command, args []string) error { return nil }
+			r.Command.SilenceErrors = true
+			r.Command.SilenceUsage = true
+
+			// hack due to https://github.com/spf13/cobra/issues/42
+			root := &cobra.Command{Use: "root"}
+			root.AddCommand(r.Command)
+			root.SetArgs(tt.args)
+
+			// error case
+			err := r.Command.Execute()
+			if tt.err != "" {
+				if !assert.Error(t, err) {
+					t.FailNow()
+				}
+				if !assert.Contains(t, err.Error(), tt.err) {
+					t.FailNow()
+				}
+				// don't check anything else in error case
+				return
+			}
+
+			// non-error case
+			if !assert.NoError(t, err) {
+				t.FailNow()
+			}
+
+			// check if Input was set
+			if !assert.Equal(t, tt.input, r.RunFns.Input) {
+				t.FailNow()
+			}
+
+			// check if Output was set
+			if !assert.Equal(t, tt.output, r.RunFns.Output) {
+				t.FailNow()
+			}
+
+			// check if Path was set
+			if !assert.Equal(t, tt.path, r.RunFns.Path) {
+				t.FailNow()
+			}
+
+			// check if FunctionPaths were set
+			if tt.functionPaths == nil {
+				// make Equal work against flag default
+				tt.functionPaths = []string{}
+			}
+			if !assert.Equal(t, tt.functionPaths, r.RunFns.FunctionPaths) {
+				t.FailNow()
+			}
+
+			// check if Functions were set
+			if tt.expected != "" {
+				if !assert.Len(t, r.RunFns.Functions, 1) {
+					t.FailNow()
+				}
+				actual := strings.TrimSpace(r.RunFns.Functions[0].MustString())
+				if !assert.Equal(t, strings.TrimSpace(tt.expected), actual) {
+					t.FailNow()
+				}
+			}
+
+		})
+	}
+
+}

cmd/config/internal/commands/sink.go

@@ -7,6 +7,7 @@ import (
 	"github.com/spf13/cobra"
 	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
 	"sigs.k8s.io/kustomize/kyaml/kio"
+	"sigs.k8s.io/kustomize/kyaml/kio/kioutil"
 )
 
 // GetSinkRunner returns a command for Sink.
@@ -18,7 +19,7 @@ func GetSinkRunner(name string) *SinkRunner {
 		Long:    commands.SinkLong,
 		Example: commands.SinkExamples,
 		RunE:    r.runE,
-		Args:    cobra.ExactArgs(1),
+		Args:    cobra.MaximumNArgs(1),
 	}
 	fixDocs(name, c)
 	r.Command = c
@@ -35,14 +36,18 @@ type SinkRunner struct {
 }
 
 func (r *SinkRunner) runE(c *cobra.Command, args []string) error {
+	var outputs []kio.Writer
+	if len(args) == 1 {
+		outputs = []kio.Writer{&kio.LocalPackageWriter{PackagePath: args[0]}}
+	} else {
+		outputs = []kio.Writer{&kio.ByteWriter{
+			Writer:           c.OutOrStdout(),
+			ClearAnnotations: []string{kioutil.PathAnnotation}},
+		}
+	}
+
 	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: c.InOrStdin()}},
-		Outputs: []kio.Writer{
-			&kio.LocalPackageWriter{
-				PackagePath:      args[0],
-				ClearAnnotations: []string{"config.kubernetes.io/path"},
-			},
-		},
-	}.Execute()
+		Inputs:  []kio.Reader{&kio.ByteReader{Reader: c.InOrStdin()}},
+		Outputs: outputs}.Execute()
 	return handleError(c, err)
 }

cmd/config/internal/commands/sink_test.go

@@ -21,8 +21,6 @@ func TestSinkCommand(t *testing.T) {
 	}
 	defer os.RemoveAll(d)
 
-	// fmt the files
-	b := &bytes.Buffer{}
 	r := commands.GetSinkRunner("")
 	r.Command.SetIn(bytes.NewBufferString(`apiVersion: config.kubernetes.io/v1alpha1
 kind: ResourceList
@@ -75,7 +73,6 @@ items:
     replicas: 3
 `))
 	r.Command.SetArgs([]string{d})
-	r.Command.SetOut(b)
 	if !assert.NoError(t, r.Command.Execute()) {
 		t.FailNow()
 	}
@@ -138,3 +135,117 @@ spec:
 		t.FailNow()
 	}
 }
+
+func TestSinkCommand_Stdout(t *testing.T) {
+	d, err := ioutil.TempDir("", "kustomize-source-test")
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+	defer os.RemoveAll(d)
+
+	// fmt the files
+	out := &bytes.Buffer{}
+	r := commands.GetSinkRunner("")
+	r.Command.SetIn(bytes.NewBufferString(`apiVersion: config.kubernetes.io/v1alpha1
+kind: ResourceList
+items:
+- kind: Deployment
+  metadata:
+    labels:
+      app: nginx2
+    name: foo
+    annotations:
+      app: nginx2
+      config.kubernetes.io/index: '0'
+      config.kubernetes.io/path: 'f1.yaml'
+  spec:
+    replicas: 1
+- kind: Service
+  metadata:
+    name: foo
+    annotations:
+      app: nginx
+      config.kubernetes.io/index: '1'
+      config.kubernetes.io/path: 'f1.yaml'
+  spec:
+    selector:
+      app: nginx
+- apiVersion: v1
+  kind: Abstraction
+  metadata:
+    name: foo
+    annotations:
+      config.kubernetes.io/function: |
+        container:
+          image: gcr.io/example/reconciler:v1
+      config.kubernetes.io/local-config: "true"
+      config.kubernetes.io/index: '0'
+      config.kubernetes.io/path: 'f2.yaml'
+  spec:
+    replicas: 3
+- apiVersion: apps/v1
+  kind: Deployment
+  metadata:
+    labels:
+      app: nginx
+    name: bar
+    annotations:
+      app: nginx
+      config.kubernetes.io/index: '1'
+      config.kubernetes.io/path: 'f2.yaml'
+  spec:
+    replicas: 3
+`))
+
+	r.Command.SetOut(out)
+	r.Command.SetArgs([]string{})
+	if !assert.NoError(t, r.Command.Execute()) {
+		t.FailNow()
+	}
+
+	expected := `kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+spec:
+  selector:
+    app: nginx
+---
+apiVersion: v1
+kind: Abstraction
+metadata:
+  name: foo
+  annotations:
+    config.kubernetes.io/function: |
+      container:
+        image: gcr.io/example/reconciler:v1
+    config.kubernetes.io/local-config: "true"
+spec:
+  replicas: 3
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: nginx
+  name: bar
+  annotations:
+    app: nginx
+spec:
+  replicas: 3
+`
+	if !assert.Equal(t, expected, out.String()) {
+		t.FailNow()
+	}
+}

cmd/config/internal/commands/source.go

@@ -21,7 +21,6 @@ func GetSourceRunner(name string) *SourceRunner {
 		Long:    commands.SourceLong,
 		Example: commands.SourceExamples,
 		RunE:    r.runE,
-		Args:    cobra.ExactArgs(1),
 	}
 	fixDocs(name, c)
 	c.Flags().StringVar(&r.WrapKind, "wrap-kind", kio.ResourceListKind,
@@ -70,8 +69,14 @@ func (r *SourceRunner) runE(c *cobra.Command, args []string) error {
 		FunctionConfig:        functionConfig,
 	})
 
-	err := kio.Pipeline{
-		Inputs:  []kio.Reader{kio.LocalPackageReader{PackagePath: args[0]}},
-		Outputs: outputs}.Execute()
+	var inputs []kio.Reader
+	for _, a := range args {
+		inputs = append(inputs, kio.LocalPackageReader{PackagePath: a})
+	}
+	if len(inputs) == 0 {
+		inputs = []kio.Reader{&kio.ByteReader{Reader: c.InOrStdin()}}
+	}
+
+	err := kio.Pipeline{Inputs: inputs, Outputs: outputs}.Execute()
 	return handleError(c, err)
 }

cmd/config/internal/commands/source_test.go

@@ -134,3 +134,67 @@ items:
 		return
 	}
 }
+
+func TestSourceCommand_Stdin(t *testing.T) {
+	d, err := ioutil.TempDir("", "kustomize-source-test")
+	if !assert.NoError(t, err) {
+		return
+	}
+	defer os.RemoveAll(d)
+
+	in := bytes.NewBufferString(`
+kind: Deployment
+metadata:
+  labels:
+    app: nginx2
+  name: foo
+  annotations:
+    app: nginx2
+spec:
+  replicas: 1
+---
+kind: Service
+metadata:
+  name: foo
+  annotations:
+    app: nginx
+spec:
+  selector:
+    app: nginx
+`)
+
+	out := &bytes.Buffer{}
+	r := commands.GetSourceRunner("")
+	r.Command.SetArgs([]string{})
+	r.Command.SetIn(in)
+	r.Command.SetOut(out)
+	if !assert.NoError(t, r.Command.Execute()) {
+		return
+	}
+
+	if !assert.Equal(t, `apiVersion: config.kubernetes.io/v1alpha1
+kind: ResourceList
+items:
+- kind: Deployment
+  metadata:
+    labels:
+      app: nginx2
+    name: foo
+    annotations:
+      app: nginx2
+      config.kubernetes.io/index: '0'
+  spec:
+    replicas: 1
+- kind: Service
+  metadata:
+    name: foo
+    annotations:
+      app: nginx
+      config.kubernetes.io/index: '1'
+  spec:
+    selector:
+      app: nginx
+`, out.String()) {
+		return
+	}
+}

cmd/config/internal/generateddocs/api/docs.go

@@ -33,7 +33,7 @@ Example:
 ### ` + "`" + `config.kubernetes.io/index` + "`" + `
 
 Records the index of a Resource in file. In a multi-object YAML file, Resources are separated
-by three dashes (` + "`" + `---` + "`" + `), and the index represents the positon of the Resource starting from zero.
+by three dashes (` + "`" + `---` + "`" + `), and the index represents the position of the Resource starting from zero.
 
 This annotation **SHOULD** be set when reading Resources from files.
 It **SHOULD** be unset when writing Resources to files.
@@ -187,7 +187,7 @@ are passed to the Function through the ` + "`" + `ResourceList.functionConfig` +
 
 ### Output
 
-The function is invoked using by runing ` + "`" + `kustomize config run dir/` + "`" + `.
+The function is invoked using byrunning ` + "`" + `kustomize config run dir/` + "`" + `.
 
 ` + "`" + `dir/my-instance_deployment.yaml` + "`" + ` contains the Deployment:
 

cmd/config/internal/generateddocs/commands/docs.go

@@ -4,6 +4,20 @@
 // Code generated by "mdtogo"; DO NOT EDIT.
 package commands
 
+var AnnotateShort = `[Alpha] Set an annotation on Resources.`
+var AnnotateLong = `
+[Alpha]  Set an annotation on Resources.
+
+  DIR:
+    Path to local directory.
+`
+var AnnotateExamples = `
+    kustomize config annotate my-dir/ --kv foo=bar
+
+    kustomize config annotate my-dir/ --kv foo=bar --kv a=b
+
+    kustomize config annotate my-dir/ --kv foo=bar --kind Deployment --name foo`
+
 var CatShort = `[Alpha] Print Resource Config from a local directory.`
 var CatLong = `
 [Alpha]  Print Resource Config from a local directory.
@@ -336,10 +350,10 @@ var SinkShort = `[Alpha] Implement a Sink by writing input to a local directory.
 var SinkLong = `
 [Alpha] Implement a Sink by writing input to a local directory.
 
-    kustomize config sink DIR
+    kustomize config sink [DIR]
 
   DIR:
-    Path to local directory.
+    Path to local directory.  If unspecified, sink will write to stdout as if it were a single file.
 
 ` + "`" + `sink` + "`" + ` writes its input to a directory
 `
@@ -350,10 +364,11 @@ var SourceShort = `[Alpha] Implement a Source by reading a local directory.`
 var SourceLong = `
 [Alpha] Implement a Source by reading a local directory.
 
-    kustomize config source DIR
+    kustomize config source DIR...
 
   DIR:
-    Path to local directory.
+    One or more paths to local directories.  Contents from directories will be concatenated.
+    If no directories are provided, source will read from stdin as if it were a single file.
 
 ` + "`" + `source` + "`" + ` emits configuration to act as input to a function
 `

cmd/kubectl/go.mod

@@ -3,13 +3,21 @@ module sigs.k8s.io/kustomize/cmd/kubectl
 go 1.13
 
 require (
+	github.com/go-errors/errors v1.0.1
 	github.com/spf13/cobra v0.0.5
+	github.com/stretchr/testify v1.4.0
+	k8s.io/api v0.17.0
 	k8s.io/apimachinery v0.17.0
 	k8s.io/cli-runtime v0.17.0
 	k8s.io/client-go v0.17.0
 	k8s.io/component-base v0.17.0 // indirect
 	k8s.io/kubectl v0.0.0-20191219154910-1528d4eea6dd
-	sigs.k8s.io/kustomize/kyaml v0.0.0
+	sigs.k8s.io/controller-runtime v0.4.0
+	sigs.k8s.io/kustomize/kstatus v0.0.1
+	sigs.k8s.io/kustomize/kyaml v0.0.2
 )
 
-replace sigs.k8s.io/kustomize/kyaml v0.0.0 => ../../kyaml
+replace (
+	sigs.k8s.io/kustomize/kstatus v0.0.1 => ../../kstatus
+	sigs.k8s.io/kustomize/kyaml v0.0.0 => ../../kyaml
+)

cmd/kubectl/go.sum

@@ -23,6 +23,7 @@ github.com/MakeNowJust/heredoc v0.0.0-20170808103936-bb23615498cd h1:sjQovDkwrZp
 github.com/MakeNowJust/heredoc v0.0.0-20170808103936-bb23615498cd/go.mod h1:64YHyfSL2R96J44Nlwm39UHepQbyR5q10x7iYa1ks2E=
 github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
+github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
 github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
@@ -31,15 +32,23 @@ github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdko
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
+github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/blang/semver v3.5.0+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/chai2010/gettext-go v0.0.0-20160711120539-c6fed771bfd5 h1:7aWHqerlJ41y6FOsEUvknqgXnGmJyJSbjhAWq5pO4F8=
 github.com/chai2010/gettext-go v0.0.0-20160711120539-c6fed771bfd5/go.mod h1:/iP1qXHoty45bqomnu2LM+VVyAEdWN+vtSHGlQgyxbw=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/coreos/bbolt v1.3.1-coreos.6/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.15+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-oidc v2.1.0+incompatible/go.mod h1:CgnwVTmzoESiwO9qyAFEMiHoZ1nMCKZlZ9V6mm3/LKc=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -51,8 +60,10 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZm
 github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.7.3-0.20190327010347-be7ac8be2ae0 h1:w3NnFcKR5241cfmQU5ZZAsf0xcpId6mWOupTvJlUX2U=
 github.com/docker/docker v0.7.3-0.20190327010347-be7ac8be2ae0/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96 h1:cenwrSVm+Z7QLSV/BsnenAOcDXdX4cMv4wP0B/5QbPg=
 github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZgvJUkLughtfhJv5dyTYa91l1fOUCrgjqmcifM=
+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
 github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e h1:p1yVGRW3nmb85p1Sh1ZJSDm4A4iKLS5QNbvUHMgGu/M=
 github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
 github.com/emicklei/go-restful v0.0.0-20170410110728-ff4f55a20633/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs=
@@ -60,6 +71,8 @@ github.com/emicklei/go-restful v2.9.5+incompatible h1:spTtZBk5DYEvbxMVutUuTyh1Ao
 github.com/emicklei/go-restful v2.9.5+incompatible/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs=
 github.com/evanphx/json-patch v4.2.0+incompatible h1:fUDGZCv/7iAN7u0puUVhvKCcsR6vRfwrJatElLBEf0I=
 github.com/evanphx/json-patch v4.2.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
+github.com/evanphx/json-patch v4.5.0+incompatible h1:ouOWdg56aJriqS0huScTkVXPC5IcNrDCXZ6OoTAWu7M=
+github.com/evanphx/json-patch v4.5.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/exponent-io/jsonpath v0.0.0-20151013193312-d6023ce2651d h1:105gxyaGwCFad8crR9dcMQWvV9Hvulu6hwUh4tWPJnM=
 github.com/exponent-io/jsonpath v0.0.0-20151013193312-d6023ce2651d/go.mod h1:ZZMPRZwes7CROmyNKgQzC3XPs6L/G2EJLHddWejkmf4=
 github.com/fatih/camelcase v1.0.0/go.mod h1:yN2Sb0lFhZJUdVvtELVWefmrXpuZESvPmqwoZc+/fpc=
@@ -68,40 +81,76 @@ github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMo
 github.com/ghodss/yaml v0.0.0-20150909031657-73d445a93680/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/globalsign/mgo v0.0.0-20180905125535-1ca0a4f7cbcb/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
+github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
+github.com/go-errors/errors v1.0.1 h1:LUHzmkK3GUKUrL/1gfBUxAHzcev3apQlezX/+O7ma6w=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logr/logr v0.1.0 h1:M1Tv3VzNlEHg6uyACnRdtrploV2P7wZqH8BoQMtz0cg=
 github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
+github.com/go-logr/zapr v0.1.0 h1:h+WVe9j6HAA01niTJPA/kKH0i7e0rLZBCwauQFcRE54=
+github.com/go-logr/zapr v0.1.0/go.mod h1:tabnROwaDl0UNxkVeFRbY8bwB37GwRv0P8lg6aAiEnk=
+github.com/go-openapi/analysis v0.0.0-20180825180245-b006789cd277/go.mod h1:k70tL6pCuVxPJOHXQ+wIac1FUrvNkHolPie/cLEU6hI=
+github.com/go-openapi/analysis v0.17.0/go.mod h1:IowGgpVeD0vNm45So8nr+IcQ3pxVtpRoBWb8PVZO0ik=
+github.com/go-openapi/analysis v0.18.0/go.mod h1:IowGgpVeD0vNm45So8nr+IcQ3pxVtpRoBWb8PVZO0ik=
+github.com/go-openapi/analysis v0.19.2/go.mod h1:3P1osvZa9jKjb8ed2TPng3f0i/UY9snX6gxi44djMjk=
+github.com/go-openapi/errors v0.17.0/go.mod h1:LcZQpmvG4wyF5j4IhA73wkLFQg+QJXOQHVjmcZxhka0=
+github.com/go-openapi/errors v0.18.0/go.mod h1:LcZQpmvG4wyF5j4IhA73wkLFQg+QJXOQHVjmcZxhka0=
+github.com/go-openapi/errors v0.19.2/go.mod h1:qX0BLWsyaKfvhluLejVpVNwNRdXZhEbTA4kxxpKBC94=
 github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0=
+github.com/go-openapi/jsonpointer v0.17.0/go.mod h1:cOnomiV+CVVwFLk0A/MExoFMjwdsUdVpsRhURCKh+3M=
+github.com/go-openapi/jsonpointer v0.18.0/go.mod h1:cOnomiV+CVVwFLk0A/MExoFMjwdsUdVpsRhURCKh+3M=
 github.com/go-openapi/jsonpointer v0.19.2 h1:A9+F4Dc/MCNB5jibxf6rRvOvR/iFgQdyNx9eIhnGqq0=
 github.com/go-openapi/jsonpointer v0.19.2/go.mod h1:3akKfEdA7DF1sugOqz1dVQHBcuDBPKZGEoHC/NkiQRg=
 github.com/go-openapi/jsonpointer v0.19.3 h1:gihV7YNZK1iK6Tgwwsxo2rJbD1GTbdm72325Bq8FI3w=
 github.com/go-openapi/jsonpointer v0.19.3/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
 github.com/go-openapi/jsonreference v0.0.0-20160704190145-13c6e3589ad9/go.mod h1:W3Z9FmVs9qj+KR4zFKmDPGiLdk1D9Rlm7cyMvf57TTg=
+github.com/go-openapi/jsonreference v0.17.0/go.mod h1:g4xxGn04lDIRh0GJb5QlpE3HfopLOL6uZrK/VgnsK9I=
+github.com/go-openapi/jsonreference v0.18.0/go.mod h1:g4xxGn04lDIRh0GJb5QlpE3HfopLOL6uZrK/VgnsK9I=
 github.com/go-openapi/jsonreference v0.19.2 h1:o20suLFB4Ri0tuzpWtyHlh7E7HnkqTNLq6aR6WVNS1w=
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@@ -117,20 +166,30 @@ github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ
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@@ -139,12 +198,15 @@ github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
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@@ -165,6 +227,8 @@ github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de/go.mod h1:zAbeS9
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@@ -203,20 +272,24 @@ github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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@@ -237,19 +310,35 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
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@@ -257,18 +346,24 @@ golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMx
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@@ -281,7 +376,9 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -290,14 +387,18 @@ golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -305,17 +406,24 @@ golang.org/x/time v0.0.0-20181108054448-85acf8d2951c h1:fqgJT0MGcGpPgpWU7VRdRjuA
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+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190920225731-5eefd052ad72/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 h1:9zdDQZ7Thm29KFXgAX/+yaf3eVbP7djjWp/dXAppNCc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gomodules.xyz/jsonpatch/v2 v2.0.1/go.mod h1:IhYNNY4jnS53ZnfE4PAmpKtDpTCj1JFXc+3mwe7XcUU=
 gonum.org/v1/gonum v0.0.0-20190331200053-3d26580ed485/go.mod h1:2ltnJ7xHfj0zHS40VVPYEAAMTa3ZGguvHGBSJeRWqE0=
 gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw=
 gonum.org/v1/netlib v0.0.0-20190331212654-76723241ea4e/go.mod h1:kS+toOQn6AQKjmKJ7gzohV1XkqsFehRA2FbsbkopSuQ=
@@ -327,7 +435,9 @@ google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
@@ -336,10 +446,14 @@ gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogR
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/inf.v0 v0.9.0/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
+gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
+gopkg.in/square/go-jose.v2 v2.2.2/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.0.0/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
@@ -349,21 +463,30 @@ gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+k8s.io/api v0.0.0-20190918155943-95b840bb6a1f/go.mod h1:uWuOHnjmNrtQomJrvEBg0c0HRNyQ+8KTEERVsK0PW48=
 k8s.io/api v0.0.0-20191214185829-ca1d04f8b0d3/go.mod h1:itOjKREfmUTvcjantxOsyYU5mbFsU7qUnyUuRfF5+5M=
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+k8s.io/apiextensions-apiserver v0.0.0-20190918161926-8f644eb6e783 h1:V6ndwCPoao1yZ52agqOKaUAl7DYWVGiXjV7ePA2i610=
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+k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90/go.mod h1:J69/JveO6XESwVgG53q3Uz5OSfgsv4uxpScmmyYOOlk=
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+k8s.io/code-generator v0.0.0-20190912054826-cd179ad6a269/go.mod h1:V5BD6M4CyaN5m+VthcclXWsVcT1Hu+glwa1bi3MIsyE=
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+k8s.io/component-base v0.0.0-20190918160511-547f6c5d7090/go.mod h1:933PBGtQFJky3TEwYx4aEPZ4IxqhWh3R6DCmzqIn1hA=
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@@ -371,13 +494,16 @@ k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8
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 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
+k8s.io/klog v0.4.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
+k8s.io/kube-openapi v0.0.0-20190816220812-743ec37842bf/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
 k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a h1:UcxjrRMyNx/i/y8G7kPvLyy7rfbeuf1PYyBf973pgyU=
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 k8s.io/kubectl v0.0.0-20191219154910-1528d4eea6dd/go.mod h1:9ehGcuUGjXVZh0qbYSB0vvofQw2JQe6c6cO0k4wu/Oo=
 k8s.io/metrics v0.0.0-20191214191643-6b1944c9f765/go.mod h1:5V7rewilItwK0cz4nomU0b3XCcees2Ka5EBYWS1HBeM=
+k8s.io/utils v0.0.0-20190801114015-581e00157fb1/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
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 k8s.io/utils v0.0.0-20191114184206-e782cd3c129f/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
 modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw=
@@ -385,9 +511,16 @@ modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
 modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
 modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
 modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
+sigs.k8s.io/controller-runtime v0.4.0 h1:wATM6/m+3w8lj8FXNaO6Fs/rq/vqoOjO1Q116Z9NPsg=
+sigs.k8s.io/controller-runtime v0.4.0/go.mod h1:ApC79lpY3PHW9xj/w9pj+lYkLgwAAUZwfXkME1Lajns=
 sigs.k8s.io/kustomize v2.0.3+incompatible h1:JUufWFNlI44MdtnjUqVnvh29rR37PQFzPbLXqhyOyX0=
 sigs.k8s.io/kustomize v2.0.3+incompatible/go.mod h1:MkjgH3RdOWrievjo6c9T245dYlB5QeXV4WCbnt/PEpU=
+sigs.k8s.io/kustomize/kyaml v0.0.2 h1:Rl/wMrnpZzZjsVeFIIOAb92Kz/UfLrTUEXjiHW6oS0o=
+sigs.k8s.io/kustomize/kyaml v0.0.2/go.mod h1:rywm/rcR5LmCBghz9956tE45OdUPChFoXVVs+WmhMTI=
 sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
+sigs.k8s.io/structured-merge-diff v0.0.0-20190817042607-6149e4549fca/go.mod h1:IIgPezJWb76P0hotTxzDbWsMYB8APh18qZnxkomBpxA=
+sigs.k8s.io/testing_frameworks v0.1.2 h1:vK0+tvjF0BZ/RYFeZ1E6BYBwHJJXhjuZ3TdsEKH+UQM=
+sigs.k8s.io/testing_frameworks v0.1.2/go.mod h1:ToQrwSC3s8Xf/lADdZp3Mktcql9CG0UAmdJG9th5i0w=
 sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
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cmd/kubectl/kubectlcobra/applier.go

@@ -0,0 +1,205 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubectlcobra
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-errors/errors"
+	"github.com/spf13/cobra"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	"k8s.io/cli-runtime/pkg/resource"
+	"k8s.io/kubectl/pkg/cmd/apply"
+	"k8s.io/kubectl/pkg/cmd/util"
+	"k8s.io/kubectl/pkg/scheme"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/kustomize/kstatus/wait"
+)
+
+// newApplier returns a new Applier. It will set up the applyOptions and
+// statusOptions which are responsible for capturing any command line flags.
+// It currently requires IOStreams, but this is a legacy from when
+// the ApplyOptions were responsible for printing progress. This is now
+// handled by a separate printer with the KubectlPrinterAdapter bridging
+// between the two.
+func newApplier(factory util.Factory, ioStreams genericclioptions.IOStreams) *Applier {
+	return &Applier{
+		applyOptions:  apply.NewApplyOptions(ioStreams),
+		statusOptions: NewStatusOptions(),
+		factory:       factory,
+		ioStreams:     ioStreams,
+	}
+}
+
+// resolver defines the interface the applier needs to observe status for resources.
+type resolver interface {
+	WaitForStatusOfObjects(ctx context.Context, objects []wait.KubernetesObject) <-chan wait.Event
+}
+
+// Applier performs the step of applying a set of resources into a cluster,
+// conditionally waits for all of them to be fully reconciled and finally
+// performs prune to clean up any resources that has been deleted.
+type Applier struct {
+	factory   util.Factory
+	ioStreams genericclioptions.IOStreams
+
+	applyOptions  *apply.ApplyOptions
+	statusOptions *StatusOptions
+	resolver      resolver
+}
+
+// Initialize sets up the Applier for actually doing an apply against
+// a cluster. This involves validating command line inputs and configuring
+// clients for communicating with the cluster.
+func (a *Applier) Initialize(cmd *cobra.Command) error {
+	a.applyOptions.PreProcessorFn = PrependGroupingObject(a.applyOptions)
+	err := a.applyOptions.Complete(a.factory, cmd)
+	if err != nil {
+		return errors.WrapPrefix(err, "error setting up ApplyOptions", 1)
+	}
+	// Default PostProcessor is configured in "Complete" function,
+	// so the prune must happen after "Complete".
+	a.applyOptions.PostProcessorFn = prune(a.factory, a.applyOptions)
+
+	resolver, err := a.newResolver(a.statusOptions.period)
+	if err != nil {
+		return errors.WrapPrefix(err, "error creating resolver", 1)
+	}
+	a.resolver = resolver
+	return nil
+}
+
+// SetFlags configures the command line flags needed for apply and
+// status. This is a temporary solution as we should separate the configuration
+// of cobra flags from the Applier.
+func (a *Applier) SetFlags(cmd *cobra.Command) {
+	a.applyOptions.DeleteFlags.AddFlags(cmd)
+	a.applyOptions.RecordFlags.AddFlags(cmd)
+	a.applyOptions.PrintFlags.AddFlags(cmd)
+	a.statusOptions.AddFlags(cmd)
+	a.applyOptions.Overwrite = true
+}
+
+// newResolver sets up a new Resolver for computing status. The configuration
+// needed for the resolver is taken from the Factory.
+func (a *Applier) newResolver(pollInterval time.Duration) (*wait.Resolver, error) {
+	config, err := a.factory.ToRESTConfig()
+	if err != nil {
+		return nil, errors.WrapPrefix(err, "error getting RESTConfig", 1)
+	}
+
+	mapper, err := a.factory.ToRESTMapper()
+	if err != nil {
+		return nil, errors.WrapPrefix(err, "error getting RESTMapper", 1)
+	}
+
+	c, err := client.New(config, client.Options{Scheme: scheme.Scheme, Mapper: mapper})
+	if err != nil {
+		return nil, errors.WrapPrefix(err, "error creating client", 1)
+	}
+
+	return wait.NewResolver(c, mapper, pollInterval), nil
+}
+
+// Run performs the Apply step. This happens asynchronously with updates
+// on progress and any errors are reported back on the event channel.
+// Cancelling the operation or setting timeout on how long to wait
+// for it complete can be done with the passed in context.
+// Note: There sn't currently any way to interrupt the operation
+// before all the given resources have been applied to the cluster. Any
+// cancellation or timeout will only affect how long we wait for the
+// resources to become current.
+func (a *Applier) Run(ctx context.Context) <-chan Event {
+	ch := make(chan Event)
+
+	go func() {
+		defer close(ch)
+		adapter := &KubectlPrinterAdapter{
+			ch: ch,
+		}
+		// The adapter is used to intercept what is meant to be printing
+		// in the ApplyOptions, and instead turn those into events.
+		a.applyOptions.ToPrinter = adapter.toPrinterFunc()
+		// This provides us with a slice of all the objects that will be
+		// applied to the cluster.
+		infos, _ := a.applyOptions.GetObjects()
+		err := a.applyOptions.Run()
+		if err != nil {
+			// If we see an error here we just report it on the channel and then
+			// give up. Eventually we might be able to determine which errors
+			// are fatal and which might allow us to continue.
+			ch <- Event{
+				EventType: ErrorEventType,
+				ErrorEvent: ErrorEvent{
+					Err: errors.WrapPrefix(err, "error applying resources", 1),
+				},
+			}
+			return
+		}
+
+		if a.statusOptions.wait {
+			statusChannel := a.resolver.WaitForStatusOfObjects(ctx, infosToObjects(infos))
+			// As long as the statusChannel remains open, we take every statusEvent,
+			// wrap it in an Event and send it on the channel.
+			for statusEvent := range statusChannel {
+				ch <- Event{
+					EventType:   StatusEventType,
+					StatusEvent: statusEvent,
+				}
+			}
+		}
+
+	}()
+	return ch
+}
+
+func infosToObjects(infos []*resource.Info) []wait.KubernetesObject {
+	var objects []wait.KubernetesObject
+	for _, info := range infos {
+		u := info.Object.(*unstructured.Unstructured)
+		objects = append(objects, u)
+	}
+	return objects
+}
+
+// EventType determines the type of events that are available.
+type EventType string
+
+const (
+	ErrorEventType  EventType = "error"
+	ApplyEventType  EventType = "apply"
+	StatusEventType EventType = "status"
+)
+
+// Event is the type of the objects that will be returned through
+// the channel that is returned from a call to Run. It contains
+// information about progress and errors encountered during
+// the process of doing apply, waiting for status and doing a prune.
+type Event struct {
+	// EventType is the type of event.
+	EventType EventType
+
+	// ErrorEvent contains information about any errors encountered.
+	ErrorEvent ErrorEvent
+
+	// ApplyEvent contains information about progress pertaining to
+	// applying a resource to the cluster.
+	ApplyEvent ApplyEvent
+
+	// StatusEvents contains information about the status of one of
+	// the applied resources.
+	StatusEvent wait.Event
+}
+
+type ErrorEvent struct {
+	Err error
+}
+
+type ApplyEvent struct {
+	Operation string
+	Object    runtime.Object
+}

cmd/kubectl/kubectlcobra/applier_test.go

@@ -0,0 +1,48 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubectlcobra
+
+import (
+	"context"
+	"github.com/stretchr/testify/assert"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	cmdtesting "k8s.io/kubectl/pkg/cmd/testing"
+	"testing"
+)
+
+// The applier is currently hard to test, as the dependencies on the ApplyOptions and
+// the resolver are hard to stub out. As we work to better separate the different
+// responsibilities of the apply functionality, we should also make it easier to test.
+// This provides some basic tests for now.
+
+func TestApplierWithUnknownFile(t *testing.T) {
+	tf := cmdtesting.NewTestFactory()
+	defer tf.Cleanup()
+	iostreams, _, _, _ := genericclioptions.NewTestIOStreams()
+	cmd := NewCmdApply("base", tf, iostreams)
+
+	applier := newApplier(tf, iostreams)
+	filenames := []string{"file.yaml"}
+	applier.applyOptions.DeleteFlags.FileNameFlags.Filenames = &filenames
+
+	err := applier.Initialize(cmd)
+	assert.NoError(t, err)
+
+	ch := applier.Run(context.TODO())
+
+	var events []Event
+	for msg := range ch {
+		events = append(events, msg)
+	}
+
+	if !assert.Equal(t, 1, len(events)) {
+		return
+	}
+
+	event := events[0]
+	if !assert.Equal(t, ErrorEventType, event.EventType) {
+		return
+	}
+	assert.Contains(t, event.ErrorEvent.Err.Error(), "does not exist")
+}

cmd/kubectl/kubectlcobra/basic_printer.go

@@ -0,0 +1,62 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubectlcobra
+
+import (
+	"fmt"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+	"sigs.k8s.io/kustomize/kstatus/wait"
+)
+
+// BasicPrinter is a simple implementation that just prints the events
+// from the channel in the default format for kubectl.
+// We need to support different printers for different output formats.
+type BasicPrinter struct {
+	ioStreams genericclioptions.IOStreams
+}
+
+// Print outputs the events from the provided channel in a simple
+// format on StdOut. As we support other printer implementations
+// this should probably be an interface.
+// This function will block until the channel is closed.
+func (b *BasicPrinter) Print(ch <-chan Event) {
+	for event := range ch {
+		switch event.EventType {
+		case ErrorEventType:
+			cmdutil.CheckErr(event.ErrorEvent.Err)
+		case ApplyEventType:
+			obj := event.ApplyEvent.Object
+			gvk := obj.GetObjectKind().GroupVersionKind()
+			name := "<unknown>"
+			if acc, err := meta.Accessor(obj); err == nil {
+				if n := acc.GetName(); len(n) > 0 {
+					name = n
+				}
+			}
+			fmt.Fprintf(b.ioStreams.Out, "%s %s\n", resourceIdToString(gvk.GroupKind(), name), event.ApplyEvent.Operation)
+		case StatusEventType:
+			statusEvent := event.StatusEvent
+			switch statusEvent.Type {
+			case wait.ResourceUpdate:
+				id := statusEvent.EventResource.ResourceIdentifier
+				gk := id.GroupKind
+				fmt.Fprintf(b.ioStreams.Out, "%s is %s: %s\n", resourceIdToString(gk, id.Name), statusEvent.EventResource.Status.String(), statusEvent.EventResource.Message)
+			case wait.Completed:
+				fmt.Fprint(b.ioStreams.Out, "all resources has reached the Current status\n")
+			case wait.Aborted:
+				fmt.Fprintf(b.ioStreams.Out, "resources failed to the reached Current status\n")
+			}
+		}
+	}
+}
+
+// resourceIdToString returns the string representation of a GroupKind and a resource name.
+func resourceIdToString(gk schema.GroupKind, name string) string {
+	return fmt.Sprintf("%s/%s", strings.ToLower(gk.String()), name)
+}

cmd/kubectl/kubectlcobra/commands.go

@@ -5,7 +5,9 @@
 package kubectlcobra
 
 import (
+	"context"
 	"flag"
+	"fmt"
 	"os"
 	"strings"
 
@@ -78,7 +80,10 @@ func updateHelp(names []string, c *cobra.Command) {
 
 // NewCmdApply creates the `apply` command
 func NewCmdApply(baseName string, f util.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
-	o := apply.NewApplyOptions(ioStreams)
+	applier := newApplier(f, ioStreams)
+	printer := &BasicPrinter{
+		ioStreams: ioStreams,
+	}
 
 	cmd := &cobra.Command{
 		Use:                   "apply (-f FILENAME | -k DIRECTORY)",
@@ -90,25 +95,67 @@ func NewCmdApply(baseName string, f util.Factory, ioStreams genericclioptions.IO
 		Run: func(cmd *cobra.Command, args []string) {
 			if len(args) > 0 {
 				// check is kustomize, if so update
-				o.DeleteFlags.FileNameFlags.Kustomize = &args[0]
+				applier.applyOptions.DeleteFlags.FileNameFlags.Kustomize = &args[0]
 			}
 
-			cmdutil.CheckErr(o.Complete(f, cmd))
-			cmdutil.CheckErr(o.Run())
+			cmdutil.CheckErr(applier.Initialize(cmd))
+
+			// Create a context with the provided timout from the cobra parameter.
+			ctx, cancel := context.WithTimeout(context.Background(), applier.statusOptions.timeout)
+			defer cancel()
+			// Run the applier. It will return a channel where we can receive updates
+			// to keep track of progress and any issues.
+			ch := applier.Run(ctx)
+
+			// The printer will print updates from the channel. It will block
+			// until the channel is closed.
+			printer.Print(ch)
 		},
 	}
 
-	// bind flag structs
-	o.DeleteFlags.AddFlags(cmd)
-	o.RecordFlags.AddFlags(cmd)
-	o.PrintFlags.AddFlags(cmd)
-
-	o.Overwrite = true
+	applier.SetFlags(cmd)
 
 	cmdutil.AddValidateFlags(cmd)
-	cmd.Flags().BoolVar(&o.ServerDryRun, "server-dry-run", o.ServerDryRun, "If true, request will be sent to server with dry-run flag, which means the modifications won't be persisted. This is an alpha feature and flag.")
+	cmd.Flags().BoolVar(&applier.applyOptions.ServerDryRun, "server-dry-run", applier.applyOptions.ServerDryRun, "If true, request will be sent to server with dry-run flag, which means the modifications won't be persisted. This is an alpha feature and flag.")
 	cmd.Flags().Bool("dry-run", false, "If true, only print the object that would be sent, without sending it. Warning: --dry-run cannot accurately output the result of merging the local manifest and the server-side data. Use --server-dry-run to get the merged result instead.")
 	cmdutil.AddServerSideApplyFlags(cmd)
 
 	return cmd
 }
+
+// PrependGroupingObject orders the objects to apply so the "grouping"
+// object stores the inventory, and it is first to be applied.
+func PrependGroupingObject(o *apply.ApplyOptions) func() error {
+	return func() error {
+		if o == nil {
+			return fmt.Errorf("ApplyOptions are nil")
+		}
+		infos, err := o.GetObjects()
+		if err != nil {
+			return err
+		}
+		_, exists := findGroupingObject(infos)
+		if exists {
+			if err := addInventoryToGroupingObj(infos); err != nil {
+				return err
+			}
+			if !sortGroupingObject(infos) {
+				return err
+			}
+		}
+		return nil
+	}
+}
+
+// Prune deletes previously applied objects that have been
+// omitted in the current apply. The previously applied objects
+// are reached through ConfigMap grouping objects.
+func prune(f util.Factory, o *apply.ApplyOptions) func() error {
+	return func() error {
+		po, err := NewPruneOptions(f, o)
+		if err != nil {
+			return err
+		}
+		return po.Prune()
+	}
+}

cmd/kubectl/kubectlcobra/commands_test.go

@@ -0,0 +1,58 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// package kubectlcobra contains cobra commands from kubectl
+package kubectlcobra
+
+import (
+	"testing"
+
+	"k8s.io/cli-runtime/pkg/resource"
+	"k8s.io/kubectl/pkg/cmd/apply"
+)
+
+func TestPrependGroupingObject(t *testing.T) {
+	tests := []struct {
+		infos []*resource.Info
+	}{
+		{
+			infos: []*resource.Info{copyGroupingInfo()},
+		},
+		{
+			infos: []*resource.Info{pod1Info, pod3Info, copyGroupingInfo()},
+		},
+		{
+			infos: []*resource.Info{pod1Info, pod2Info, copyGroupingInfo(), pod3Info},
+		},
+	}
+
+	for _, test := range tests {
+		applyOptions := createApplyOptions(test.infos)
+		f := PrependGroupingObject(applyOptions)
+		err := f()
+		if err != nil {
+			t.Errorf("Error running pre-processor callback: %s", err)
+		}
+		infos, _ := applyOptions.GetObjects()
+		if len(test.infos) != len(infos) {
+			t.Fatalf("Wrong number of objects after prepending grouping object")
+		}
+		groupingInfo := infos[0]
+		if !isGroupingObject(groupingInfo.Object) {
+			t.Fatalf("First object is not the grouping object")
+		}
+		inventory, _ := retrieveInventoryFromGroupingObj(infos)
+		if len(inventory) != (len(infos) - 1) {
+			t.Errorf("Wrong number of inventory items stored in grouping object")
+		}
+	}
+
+}
+
+// createApplyOptions is a helper function to assemble the ApplyOptions
+// with the passed objects (infos).
+func createApplyOptions(infos []*resource.Info) *apply.ApplyOptions {
+	applyOptions := &apply.ApplyOptions{}
+	applyOptions.SetObjects(infos)
+	return applyOptions
+}

cmd/kubectl/kubectlcobra/grouping.go

@@ -6,6 +6,10 @@ package kubectlcobra
 
 import (
 	"fmt"
+	"hash/fnv"
+	"sort"
+	"strconv"
+	"strings"
 
 	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
@@ -13,7 +17,30 @@ import (
 	"k8s.io/cli-runtime/pkg/resource"
 )
 
-const GroupingLabel = "kustomize.k8s.io/group-id"
+const (
+	GroupingLabel = "kustomize.config.k8s.io/inventory-id"
+	GroupingHash  = "kustomize.config.k8s.io/inventory-hash"
+)
+
+// retrieveGroupingLabel returns the string value of the GroupingLabel
+// for the passed object. Returns error if the passed object is nil or
+// is not a grouping object.
+func retrieveGroupingLabel(obj runtime.Object) (string, error) {
+	var groupingLabel string
+	if obj == nil {
+		return "", fmt.Errorf("Grouping object is nil.\n")
+	}
+	accessor, err := meta.Accessor(obj)
+	if err != nil {
+		return "", err
+	}
+	labels := accessor.GetLabels()
+	groupingLabel, exists := labels[GroupingLabel]
+	if !exists {
+		return "", fmt.Errorf("Grouping label does not exist for grouping object: %s\n", GroupingLabel)
+	}
+	return strings.TrimSpace(groupingLabel), nil
+}
 
 // isGroupingObject returns true if the passed object has the
 // grouping label.
@@ -22,13 +49,9 @@ func isGroupingObject(obj runtime.Object) bool {
 	if obj == nil {
 		return false
 	}
-	accessor, err := meta.Accessor(obj)
-	if err == nil {
-		labels := accessor.GetLabels()
-		_, exists := labels[GroupingLabel]
-		if exists {
-			return true
-		}
+	groupingLabel, err := retrieveGroupingLabel(obj)
+	if err == nil && len(groupingLabel) > 0 {
+		return true
 	}
 	return false
 }
@@ -69,7 +92,8 @@ func sortGroupingObject(infos []*resource.Info) bool {
 func addInventoryToGroupingObj(infos []*resource.Info) error {
 
 	// Iterate through the objects (infos), creating an Inventory struct
-	// as metadata for the object, or if it's the grouping object, store it.
+	// as metadata for each object, or if it's the grouping object, store it.
+	var groupingInfo *resource.Info
 	var groupingObj *unstructured.Unstructured
 	inventoryMap := map[string]string{}
 	for _, info := range infos {
@@ -84,6 +108,7 @@ func addInventoryToGroupingObj(infos []*resource.Info) error {
 			if !ok {
 				return fmt.Errorf("Grouping object is not an Unstructured: %#v", groupingObj)
 			}
+			groupingInfo = info
 		} else {
 			if obj == nil {
 				return fmt.Errorf("Creating inventory; object is nil")
@@ -102,11 +127,35 @@ func addInventoryToGroupingObj(infos []*resource.Info) error {
 	if groupingObj == nil {
 		return fmt.Errorf("Grouping object not found")
 	}
-	err := unstructured.SetNestedStringMap(groupingObj.UnstructuredContent(), inventoryMap, "data")
-	if err != nil {
-		return err
-	}
 
+	if len(inventoryMap) > 0 {
+		// Adds the inventory map to the ConfigMap "data" section.
+		err := unstructured.SetNestedStringMap(groupingObj.UnstructuredContent(),
+			inventoryMap, "data")
+		if err != nil {
+			return err
+		}
+		// Adds the hash of the inventory strings as an annotation to the
+		// grouping object. Inventory strings must be sorted to make hash
+		// deterministic.
+		inventoryList := mapKeysToSlice(inventoryMap)
+		sort.Strings(inventoryList)
+		invHash, err := calcInventoryHash(inventoryList)
+		if err != nil {
+			return err
+		}
+		// Add the hash as a suffix to the grouping object's name.
+		invHashStr := strconv.FormatUint(uint64(invHash), 16)
+		if err := addSuffixToName(groupingInfo, invHashStr); err != nil {
+			return err
+		}
+		annotations := groupingObj.GetAnnotations()
+		if annotations == nil {
+			annotations = map[string]string{}
+		}
+		annotations[GroupingHash] = invHashStr
+		groupingObj.SetAnnotations(annotations)
+	}
 	return nil
 }
 
@@ -143,3 +192,77 @@ func retrieveInventoryFromGroupingObj(infos []*resource.Info) ([]*Inventory, err
 	}
 	return inventory, nil
 }
+
+// calcInventoryHash returns an unsigned int32 representing the hash
+// of the inventory strings. If there is an error writing bytes to
+// the hash, then the error is returned; nil is returned otherwise.
+// Used to quickly identify the set of resources in the grouping object.
+func calcInventoryHash(inv []string) (uint32, error) {
+	h := fnv.New32a()
+	for _, is := range inv {
+		_, err := h.Write([]byte(is))
+		if err != nil {
+			return uint32(0), err
+		}
+	}
+	return h.Sum32(), nil
+}
+
+// retrieveInventoryHash takes a grouping object (encapsulated by
+// a resource.Info), and returns the string representing the hash
+// of the grouping inventory; returns empty string if the grouping
+// object is not in Unstructured format, or if the hash annotation
+// does not exist.
+func retrieveInventoryHash(groupingInfo *resource.Info) string {
+	var invHash = ""
+	groupingObj, ok := groupingInfo.Object.(*unstructured.Unstructured)
+	if ok {
+		annotations := groupingObj.GetAnnotations()
+		if annotations != nil {
+			invHash = annotations[GroupingHash]
+		}
+	}
+	return invHash
+}
+
+// mapKeysToSlice returns the map keys as a slice of strings.
+func mapKeysToSlice(m map[string]string) []string {
+	s := make([]string, len(m))
+	i := 0
+	for k := range m {
+		s[i] = k
+		i++
+	}
+	return s
+}
+
+// addSuffixToName adds the passed suffix (usually a hash) as a suffix
+// to the name of the passed object stored in the Info struct. Returns
+// an error if the object is not "*unstructured.Unstructured" or if the
+// name stored in the object differs from the name in the Info struct.
+func addSuffixToName(info *resource.Info, suffix string) error {
+
+	if info == nil {
+		return fmt.Errorf("Nil resource.Info")
+	}
+	suffix = strings.TrimSpace(suffix)
+	if len(suffix) == 0 {
+		return fmt.Errorf("Passed empty suffix")
+	}
+
+	accessor, _ := meta.Accessor(info.Object)
+	name := accessor.GetName()
+	if name != info.Name {
+		return fmt.Errorf("Grouping object (%s) and resource.Info (%s) have different names\n", name, info.Name)
+	}
+	// Error if name alread has suffix.
+	suffix = "-" + suffix
+	if strings.HasSuffix(name, suffix) {
+		return fmt.Errorf("Name already has suffix: %s\n", name)
+	}
+	name += suffix
+	accessor.SetName(name)
+	info.Name = name
+
+	return nil
+}

cmd/kubectl/kubectlcobra/grouping_test.go

@@ -5,8 +5,11 @@
 package kubectlcobra
 
 import (
+	"fmt"
 	"testing"
 
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
@@ -19,6 +22,8 @@ var pod1Name = "pod-1"
 var pod2Name = "pod-2"
 var pod3Name = "pod-3"
 
+var testGroupingLabel = "test-app-label"
+
 var groupingObj = unstructured.Unstructured{
 	Object: map[string]interface{}{
 		"apiVersion": "v1",
@@ -27,18 +32,12 @@ var groupingObj = unstructured.Unstructured{
 			"name":      groupingObjName,
 			"namespace": testNamespace,
 			"labels": map[string]interface{}{
-				GroupingLabel: "true",
+				GroupingLabel: testGroupingLabel,
 			},
 		},
 	},
 }
 
-var groupingInfo = &resource.Info{
-	Namespace: testNamespace,
-	Name:      groupingObjName,
-	Object:    &groupingObj,
-}
-
 var pod1 = unstructured.Unstructured{
 	Object: map[string]interface{}{
 		"apiVersion": "v1",
@@ -90,6 +89,89 @@ var pod3Info = &resource.Info{
 	Object:    &pod3,
 }
 
+var nonUnstructuredGroupingObj = &corev1.ConfigMap{
+	ObjectMeta: metav1.ObjectMeta{
+		Namespace: testNamespace,
+		Name:      groupingObjName,
+		Labels: map[string]string{
+			GroupingLabel: "true",
+		},
+	},
+}
+
+var nonUnstructuredGroupingInfo = &resource.Info{
+	Namespace: testNamespace,
+	Name:      groupingObjName,
+	Object:    nonUnstructuredGroupingObj,
+}
+
+var nilInfo = &resource.Info{
+	Namespace: testNamespace,
+	Name:      groupingObjName,
+	Object:    nil,
+}
+
+var groupingObjLabelWithSpace = unstructured.Unstructured{
+	Object: map[string]interface{}{
+		"apiVersion": "v1",
+		"kind":       "ConfigMap",
+		"metadata": map[string]interface{}{
+			"name":      groupingObjName,
+			"namespace": testNamespace,
+			"labels": map[string]interface{}{
+				GroupingLabel: "\tgrouping-label ",
+			},
+		},
+	},
+}
+
+func TestRetrieveGroupingLabel(t *testing.T) {
+	tests := []struct {
+		obj           runtime.Object
+		groupingLabel string
+		isError       bool
+	}{
+		// Nil grouping object throws error.
+		{
+			obj:           nil,
+			groupingLabel: "",
+			isError:       true,
+		},
+		// Pod is not a grouping object.
+		{
+			obj:           &pod2,
+			groupingLabel: "",
+			isError:       true,
+		},
+		// Retrieves label without preceding/trailing whitespace.
+		{
+			obj:           &groupingObjLabelWithSpace,
+			groupingLabel: "grouping-label",
+			isError:       false,
+		},
+		{
+			obj:           &groupingObj,
+			groupingLabel: testGroupingLabel,
+			isError:       false,
+		},
+	}
+
+	for _, test := range tests {
+		actual, err := retrieveGroupingLabel(test.obj)
+		if test.isError && err == nil {
+			t.Errorf("Did not receive expected error.\n")
+		}
+		if !test.isError {
+			if err != nil {
+				t.Fatalf("Received unexpected error: %s\n", err)
+			}
+			if test.groupingLabel != actual {
+				t.Errorf("Expected grouping label (%s), got (%s)\n", test.groupingLabel, actual)
+			}
+		}
+	}
+}
+
 func TestIsGroupingObject(t *testing.T) {
 	tests := []struct {
 		obj        runtime.Object
@@ -137,7 +219,7 @@ func TestFindGroupingObject(t *testing.T) {
 			name:   "",
 		},
 		{
-			infos:  []*resource.Info{groupingInfo},
+			infos:  []*resource.Info{copyGroupingInfo()},
 			exists: true,
 			name:   groupingObjName,
 		},
@@ -152,7 +234,7 @@ func TestFindGroupingObject(t *testing.T) {
 			name:   "",
 		},
 		{
-			infos:  []*resource.Info{pod1Info, pod2Info, groupingInfo, pod3Info},
+			infos:  []*resource.Info{pod1Info, pod2Info, copyGroupingInfo(), pod3Info},
 			exists: true,
 			name:   groupingObjName,
 		},
@@ -182,7 +264,7 @@ func TestSortGroupingObject(t *testing.T) {
 			sorted: false,
 		},
 		{
-			infos:  []*resource.Info{groupingInfo},
+			infos:  []*resource.Info{copyGroupingInfo()},
 			sorted: true,
 		},
 		{
@@ -194,23 +276,23 @@ func TestSortGroupingObject(t *testing.T) {
 			sorted: false,
 		},
 		{
-			infos:  []*resource.Info{groupingInfo, pod1Info},
+			infos:  []*resource.Info{copyGroupingInfo(), pod1Info},
 			sorted: true,
 		},
 		{
-			infos:  []*resource.Info{pod1Info, groupingInfo},
+			infos:  []*resource.Info{pod1Info, copyGroupingInfo()},
 			sorted: true,
 		},
 		{
-			infos:  []*resource.Info{pod1Info, pod2Info, groupingInfo, pod3Info},
+			infos:  []*resource.Info{pod1Info, pod2Info, copyGroupingInfo(), pod3Info},
 			sorted: true,
 		},
 		{
-			infos:  []*resource.Info{pod1Info, pod2Info, pod3Info, groupingInfo},
+			infos:  []*resource.Info{pod1Info, pod2Info, pod3Info, copyGroupingInfo()},
 			sorted: true,
 		},
 		{
-			infos:  []*resource.Info{groupingInfo, pod1Info, pod2Info, pod3Info},
+			infos:  []*resource.Info{copyGroupingInfo(), pod1Info, pod2Info, pod3Info},
 			sorted: true,
 		},
 	}
@@ -250,24 +332,33 @@ func TestAddRetrieveInventoryToFromGroupingObject(t *testing.T) {
 		},
 		// Grouping object without other objects is OK.
 		{
-			infos:    []*resource.Info{groupingInfo},
+			infos:   []*resource.Info{copyGroupingInfo(), nilInfo},
+			isError: true,
+		},
+		{
+			infos:   []*resource.Info{nonUnstructuredGroupingInfo},
+			isError: true,
+		},
+		{
+			infos:    []*resource.Info{copyGroupingInfo()},
 			expected: []*Inventory{},
 			isError:  false,
 		},
 		// More than one grouping object is an error.
 		{
-			infos:    []*resource.Info{groupingInfo, groupingInfo},
+			infos:    []*resource.Info{copyGroupingInfo(), copyGroupingInfo()},
 			expected: []*Inventory{},
 			isError:  true,
 		},
 		// More than one grouping object is an error.
 		{
-			infos:    []*resource.Info{groupingInfo, pod1Info, groupingInfo},
+			infos:    []*resource.Info{copyGroupingInfo(), pod1Info, copyGroupingInfo()},
 			expected: []*Inventory{},
 			isError:  true,
 		},
+		// Basic test case: one grouping object, one pod.
 		{
-			infos: []*resource.Info{groupingInfo, pod1Info},
+			infos: []*resource.Info{copyGroupingInfo(), pod1Info},
 			expected: []*Inventory{
 				&Inventory{
 					Namespace: testNamespace,
@@ -281,7 +372,7 @@ func TestAddRetrieveInventoryToFromGroupingObject(t *testing.T) {
 			isError: false,
 		},
 		{
-			infos: []*resource.Info{pod1Info, groupingInfo},
+			infos: []*resource.Info{pod1Info, copyGroupingInfo()},
 			expected: []*Inventory{
 				&Inventory{
 					Namespace: testNamespace,
@@ -295,7 +386,7 @@ func TestAddRetrieveInventoryToFromGroupingObject(t *testing.T) {
 			isError: false,
 		},
 		{
-			infos: []*resource.Info{pod1Info, pod2Info, groupingInfo, pod3Info},
+			infos: []*resource.Info{pod1Info, pod2Info, copyGroupingInfo(), pod3Info},
 			expected: []*Inventory{
 				&Inventory{
 					Namespace: testNamespace,
@@ -325,7 +416,7 @@ func TestAddRetrieveInventoryToFromGroupingObject(t *testing.T) {
 			isError: false,
 		},
 		{
-			infos: []*resource.Info{pod1Info, pod2Info, pod3Info, groupingInfo},
+			infos: []*resource.Info{pod1Info, pod2Info, pod3Info, copyGroupingInfo()},
 			expected: []*Inventory{
 				&Inventory{
 					Namespace: testNamespace,
@@ -355,7 +446,7 @@ func TestAddRetrieveInventoryToFromGroupingObject(t *testing.T) {
 			isError: false,
 		},
 		{
-			infos: []*resource.Info{groupingInfo, pod1Info, pod2Info, pod3Info},
+			infos: []*resource.Info{copyGroupingInfo(), pod1Info, pod2Info, pod3Info},
 			expected: []*Inventory{
 				&Inventory{
 					Namespace: testNamespace,
@@ -393,28 +484,117 @@ func TestAddRetrieveInventoryToFromGroupingObject(t *testing.T) {
 		}
 		if !test.isError {
 			if err != nil {
-				t.Errorf("Received error when expecting none (%s)\n", err)
-			} else {
-				retrieved, err := retrieveInventoryFromGroupingObj(test.infos)
-				if err != nil {
-					t.Errorf("Error retrieving inventory: %s\n", err)
-				}
-				if len(test.expected) != len(retrieved) {
-					t.Errorf("Expected inventory for %d resources, actual %d",
-						len(test.expected), len(retrieved))
-				}
-				for _, expected := range test.expected {
-					found := false
-					for _, actual := range retrieved {
-						if expected.Equals(actual) {
-							found = true
-						}
-					}
-					if !found {
-						t.Errorf("Expected inventory (%s) not found", expected)
+				t.Fatalf("Received error when expecting none (%s)\n", err)
+			}
+			retrieved, err := retrieveInventoryFromGroupingObj(test.infos)
+			if err != nil {
+				t.Fatalf("Error retrieving inventory: %s\n", err)
+			}
+			if len(test.expected) != len(retrieved) {
+				t.Errorf("Expected inventory for %d resources, actual %d",
+					len(test.expected), len(retrieved))
+			}
+			for _, expected := range test.expected {
+				found := false
+				for _, actual := range retrieved {
+					if expected.Equals(actual) {
+						found = true
+						continue
 					}
 				}
+				if !found {
+					t.Errorf("Expected inventory (%s) not found", expected)
+				}
+			}
+			// If the grouping object has an inventory, check the
+			// grouping object has an inventory hash.
+			groupingInfo, exists := findGroupingObject(test.infos)
+			if exists && len(test.expected) > 0 {
+				invHash := retrieveInventoryHash(groupingInfo)
+				if len(invHash) == 0 {
+					t.Errorf("Grouping object missing inventory hash")
+				}
 			}
 		}
 	}
 }
+
+func TestAddSuffixToName(t *testing.T) {
+	tests := []struct {
+		info     *resource.Info
+		suffix   string
+		expected string
+		isError  bool
+	}{
+		// Nil info should return error.
+		{
+			info:     nil,
+			suffix:   "",
+			expected: "",
+			isError:  true,
+		},
+		// Empty suffix should return error.
+		{
+			info:     copyGroupingInfo(),
+			suffix:   "",
+			expected: "",
+			isError:  true,
+		},
+		// Empty suffix should return error.
+		{
+			info:     copyGroupingInfo(),
+			suffix:   " \t",
+			expected: "",
+			isError:  true,
+		},
+		{
+			info:     copyGroupingInfo(),
+			suffix:   "hashsuffix",
+			expected: groupingObjName + "-hashsuffix",
+			isError:  false,
+		},
+	}
+
+	for _, test := range tests {
+		//t.Errorf("%#v [%s]", test.info, test.suffix)
+		err := addSuffixToName(test.info, test.suffix)
+		if test.isError {
+			if err == nil {
+				t.Errorf("Should have produced an error, but returned none.")
+			}
+		}
+		if !test.isError {
+			if err != nil {
+				t.Fatalf("Received error when expecting none (%s)\n", err)
+			}
+			actualName, err := getObjectName(test.info.Object)
+			if err != nil {
+				t.Fatalf("Error getting object name: %s", err)
+			}
+			if actualName != test.info.Name {
+				t.Errorf("Object name (%s) does not match info name (%s)\n", actualName, test.info.Name)
+			}
+			if test.expected != actualName {
+				t.Errorf("Expected name (%s), got (%s)\n", test.expected, actualName)
+			}
+		}
+	}
+}
+
+func getObjectName(obj runtime.Object) (string, error) {
+	u, ok := obj.(*unstructured.Unstructured)
+	if !ok {
+		return "", fmt.Errorf("Grouping object is not Unstructured format")
+	}
+	return u.GetName(), nil
+}
+
+func copyGroupingInfo() *resource.Info {
+	groupingObjCopy := groupingObj.DeepCopy()
+	var groupingInfo = &resource.Info{
+		Namespace: testNamespace,
+		Name:      groupingObjName,
+		Object:    groupingObjCopy,
+	}
+	return groupingInfo
+}

cmd/kubectl/kubectlcobra/inventory.go

@@ -6,6 +6,7 @@ package kubectlcobra
 
 import (
 	"fmt"
+	"sort"
 	"strings"
 
 	"k8s.io/apimachinery/pkg/runtime/schema"
@@ -70,6 +71,9 @@ func parseInventory(inv string) (*Inventory, error) {
 // Equals returns true if the Inventory structs are identical;
 // false otherwise.
 func (i *Inventory) Equals(other *Inventory) bool {
+	if other == nil {
+		return false
+	}
 	return i.String() == other.String()
 }
 
@@ -81,3 +85,109 @@ func (i *Inventory) String() string {
 		i.GroupKind.Group, fieldSeparator,
 		i.GroupKind.Kind)
 }
+
+// InventorySet encapsulates a grouping of unique Inventory
+// structs. Organizes the Inventory structs with a map,
+// which ensures there are no duplicates. Allows set
+// operations such as merging sets and subtracting sets.
+type InventorySet struct {
+	set map[string]*Inventory
+}
+
+// NewInventorySet returns a pointer to an InventorySet
+// struct grouping the passed Inventory items.
+func NewInventorySet(items []*Inventory) *InventorySet {
+	invSet := InventorySet{set: map[string]*Inventory{}}
+	invSet.AddItems(items)
+	return &invSet
+}
+
+// GetItems returns the set of pointers to Inventory
+// structs.
+func (is *InventorySet) GetItems() []*Inventory {
+	items := []*Inventory{}
+	for _, item := range is.set {
+		items = append(items, item)
+	}
+	return items
+}
+
+// AddItems adds Inventory structs to the set which
+// are not already in the set.
+func (is *InventorySet) AddItems(items []*Inventory) {
+	for _, item := range items {
+		if item != nil {
+			is.set[item.String()] = item
+		}
+	}
+}
+
+// DeleteItem removes an Inventory struct from the
+// set if it exists in the set. Returns true if the
+// Inventory item was deleted, false if it did not exist
+// in the set.
+func (is *InventorySet) DeleteItem(item *Inventory) bool {
+	if item == nil {
+		return false
+	}
+	if _, ok := is.set[item.String()]; ok {
+		delete(is.set, item.String())
+		return true
+	}
+	return false
+}
+
+// Merge combines the unique set of Inventory items from the
+// current set with the passed "other" set, returning a new
+// set or error. Returns an error if the passed set to merge
+// is nil.
+func (is *InventorySet) Merge(other *InventorySet) (*InventorySet, error) {
+	if other == nil {
+		return nil, fmt.Errorf("InventorySet to merge is nil.")
+	}
+	// Copy the current InventorySet into result
+	result := NewInventorySet(is.GetItems())
+	result.AddItems(other.GetItems())
+	return result, nil
+}
+
+// Subtract removes the Inventory items in the "other" set from the
+// current set, returning a new set. This does not modify the current
+// set. Returns an error if the passed set to subtract is nil.
+func (is *InventorySet) Subtract(other *InventorySet) (*InventorySet, error) {
+	if other == nil {
+		return nil, fmt.Errorf("InventorySet to subtract is nil.")
+	}
+	// Copy the current InventorySet into result
+	result := NewInventorySet(is.GetItems())
+	// Remove each item in "other" which exists in "result"
+	for _, item := range other.GetItems() {
+		result.DeleteItem(item)
+	}
+	return result, nil
+}
+
+// Equals returns true if the "other" inventory set is the same
+// as this current inventory set. Relies on the fact that the
+// inventory items are sorted for the String() function.
+func (is *InventorySet) Equals(other *InventorySet) bool {
+	if other == nil {
+		return false
+	}
+	return is.String() == other.String()
+}
+
+// String returns a string describing set of Inventory structs.
+func (is *InventorySet) String() string {
+	strs := []string{}
+	for _, item := range is.GetItems() {
+		strs = append(strs, item.String())
+	}
+	sort.Strings(strs)
+	return strings.Join(strs, ", ")
+}
+
+// Size returns the number of Inventory structs in the set.
+func (is *InventorySet) Size() int {
+	return len(is.set)
+}

cmd/kubectl/kubectlcobra/inventory_test.go

@@ -80,6 +80,18 @@ func TestInventoryEqual(t *testing.T) {
 		inventory2 *Inventory
 		isEqual    bool
 	}{
+		// "Other" inventory is nil, then not equal.
+		{
+			inventory1: &Inventory{
+				Name: "test-inv",
+				GroupKind: schema.GroupKind{
+					Group: "apps",
+					Kind:  "Deployment",
+				},
+			},
+			inventory2: nil,
+			isEqual:    false,
+		},
 		// Two equal inventories without a namespace
 		{
 			inventory1: &Inventory{
@@ -216,3 +228,331 @@ func TestParseInventory(t *testing.T) {
 		}
 	}
 }
+
+var inventory1 = Inventory{
+	Namespace: "test-namespace",
+	Name:      "test-inv-1",
+	GroupKind: schema.GroupKind{
+		Group: "apps",
+		Kind:  "Deployment",
+	},
+}
+
+var inventory2 = Inventory{
+	Namespace: "test-namespace",
+	Name:      "test-inv-2",
+	GroupKind: schema.GroupKind{
+		Group: "",
+		Kind:  "Pod",
+	},
+}
+
+var inventory3 = Inventory{
+	Namespace: "test-namespace",
+	Name:      "test-inv-3",
+	GroupKind: schema.GroupKind{
+		Group: "",
+		Kind:  "Service",
+	},
+}
+
+var inventory4 = Inventory{
+	Namespace: "test-namespace",
+	Name:      "test-inv-4",
+	GroupKind: schema.GroupKind{
+		Group: "apps",
+		Kind:  "DaemonSet",
+	},
+}
+
+func TestNewInventorySet(t *testing.T) {
+	tests := []struct {
+		items        []*Inventory
+		expectedStr  string
+		expectedSize int
+	}{
+		{
+			items:        []*Inventory{},
+			expectedStr:  "",
+			expectedSize: 0,
+		},
+		{
+			items:        []*Inventory{&inventory1},
+			expectedStr:  "test-namespace_test-inv-1_apps_Deployment",
+			expectedSize: 1,
+		},
+		{
+			items:        []*Inventory{&inventory1, &inventory2},
+			expectedStr:  "test-namespace_test-inv-1_apps_Deployment, test-namespace_test-inv-2__Pod",
+			expectedSize: 2,
+		},
+	}
+
+	for _, test := range tests {
+		invSet := NewInventorySet(test.items)
+		actualStr := invSet.String()
+		actualSize := invSet.Size()
+		if test.expectedStr != actualStr {
+			t.Errorf("Expected InventorySet (%s), got (%s)\n", test.expectedStr, actualStr)
+		}
+		if test.expectedSize != actualSize {
+			t.Errorf("Expected InventorySet size (%d), got (%d)\n", test.expectedSize, actualSize)
+		}
+		actualItems := invSet.GetItems()
+		if len(test.items) != len(actualItems) {
+			t.Errorf("Expected num inventory items (%d), got (%d)\n", len(test.items), len(actualItems))
+		}
+	}
+}
+
+func TestInventorySetAddItems(t *testing.T) {
+	tests := []struct {
+		initialItems  []*Inventory
+		addItems      []*Inventory
+		expectedItems []*Inventory
+	}{
+		// Adding no items to empty inventory set.
+		{
+			initialItems:  []*Inventory{},
+			addItems:      []*Inventory{},
+			expectedItems: []*Inventory{},
+		},
+		// Adding item to empty inventory set.
+		{
+			initialItems:  []*Inventory{},
+			addItems:      []*Inventory{&inventory1},
+			expectedItems: []*Inventory{&inventory1},
+		},
+		// Adding no items does not change the inventory set
+		{
+			initialItems:  []*Inventory{&inventory1},
+			addItems:      []*Inventory{},
+			expectedItems: []*Inventory{&inventory1},
+		},
+		// Adding an item which alread exists does not increase size.
+		{
+			initialItems:  []*Inventory{&inventory1, &inventory2},
+			addItems:      []*Inventory{&inventory1},
+			expectedItems: []*Inventory{&inventory1, &inventory2},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1, &inventory2},
+			addItems:      []*Inventory{&inventory3, &inventory4},
+			expectedItems: []*Inventory{&inventory1, &inventory2, &inventory3, &inventory4},
+		},
+	}
+
+	for _, test := range tests {
+		invSet := NewInventorySet(test.initialItems)
+		invSet.AddItems(test.addItems)
+		if len(test.expectedItems) != invSet.Size() {
+			t.Errorf("Expected num inventory items (%d), got (%d)\n", len(test.expectedItems), invSet.Size())
+		}
+	}
+}
+
+func TestInventorySetDeleteItem(t *testing.T) {
+	tests := []struct {
+		initialItems  []*Inventory
+		deleteItem    *Inventory
+		expected      bool
+		expectedItems []*Inventory
+	}{
+		{
+			initialItems:  []*Inventory{},
+			deleteItem:    nil,
+			expected:      false,
+			expectedItems: []*Inventory{},
+		},
+		{
+			initialItems:  []*Inventory{},
+			deleteItem:    &inventory1,
+			expected:      false,
+			expectedItems: []*Inventory{},
+		},
+		{
+			initialItems:  []*Inventory{&inventory2},
+			deleteItem:    &inventory1,
+			expected:      false,
+			expectedItems: []*Inventory{&inventory2},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1},
+			deleteItem:    &inventory1,
+			expected:      true,
+			expectedItems: []*Inventory{},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1, &inventory2},
+			deleteItem:    &inventory1,
+			expected:      true,
+			expectedItems: []*Inventory{&inventory2},
+		},
+	}
+
+	for _, test := range tests {
+		invSet := NewInventorySet(test.initialItems)
+		actual := invSet.DeleteItem(test.deleteItem)
+		if test.expected != actual {
+			t.Errorf("Expected return value (%t), got (%t)\n", test.expected, actual)
+		}
+		if len(test.expectedItems) != invSet.Size() {
+			t.Errorf("Expected num inventory items (%d), got (%d)\n", len(test.expectedItems), invSet.Size())
+		}
+	}
+}
+
+func TestInventorySetMerge(t *testing.T) {
+	tests := []struct {
+		set1   []*Inventory
+		set2   []*Inventory
+		merged []*Inventory
+	}{
+		{
+			set1:   []*Inventory{},
+			set2:   []*Inventory{},
+			merged: []*Inventory{},
+		},
+		{
+			set1:   []*Inventory{},
+			set2:   []*Inventory{&inventory1},
+			merged: []*Inventory{&inventory1},
+		},
+		{
+			set1:   []*Inventory{&inventory1},
+			set2:   []*Inventory{},
+			merged: []*Inventory{&inventory1},
+		},
+		{
+			set1:   []*Inventory{&inventory1, &inventory2},
+			set2:   []*Inventory{&inventory1},
+			merged: []*Inventory{&inventory1, &inventory2},
+		},
+		{
+			set1:   []*Inventory{&inventory1, &inventory2},
+			set2:   []*Inventory{&inventory1, &inventory2},
+			merged: []*Inventory{&inventory1, &inventory2},
+		},
+		{
+			set1:   []*Inventory{&inventory1, &inventory2},
+			set2:   []*Inventory{&inventory3, &inventory4},
+			merged: []*Inventory{&inventory1, &inventory2, &inventory3, &inventory4},
+		},
+	}
+
+	for _, test := range tests {
+		invSet1 := NewInventorySet(test.set1)
+		invSet2 := NewInventorySet(test.set2)
+		expected := NewInventorySet(test.merged)
+		merged, _ := invSet1.Merge(invSet2)
+		if expected.Size() != merged.Size() {
+			t.Errorf("Expected merged inventory set size (%d), got (%d)\n", expected.Size(), merged.Size())
+		}
+	}
+}
+
+func TestInventorySetSubtract(t *testing.T) {
+	tests := []struct {
+		initialItems  []*Inventory
+		subtractItems []*Inventory
+		expected      []*Inventory
+	}{
+		{
+			initialItems:  []*Inventory{},
+			subtractItems: []*Inventory{},
+			expected:      []*Inventory{},
+		},
+		{
+			initialItems:  []*Inventory{},
+			subtractItems: []*Inventory{&inventory1},
+			expected:      []*Inventory{},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1},
+			subtractItems: []*Inventory{},
+			expected:      []*Inventory{&inventory1},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1, &inventory2},
+			subtractItems: []*Inventory{&inventory1},
+			expected:      []*Inventory{&inventory2},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1, &inventory2},
+			subtractItems: []*Inventory{&inventory1, &inventory2},
+			expected:      []*Inventory{},
+		},
+		{
+			initialItems:  []*Inventory{&inventory1, &inventory2},
+			subtractItems: []*Inventory{&inventory3, &inventory4},
+			expected:      []*Inventory{&inventory1, &inventory2},
+		},
+	}
+
+	for _, test := range tests {
+		invInitialItems := NewInventorySet(test.initialItems)
+		invSubtractItems := NewInventorySet(test.subtractItems)
+		expected := NewInventorySet(test.expected)
+		actual, _ := invInitialItems.Subtract(invSubtractItems)
+		if expected.Size() != actual.Size() {
+			t.Errorf("Expected subtracted inventory set size (%d), got (%d)\n", expected.Size(), actual.Size())
+		}
+	}
+}
+
+func TestInventorySetEquals(t *testing.T) {
+	tests := []struct {
+		set1    []*Inventory
+		set2    []*Inventory
+		isEqual bool
+	}{
+		{
+			set1:    []*Inventory{},
+			set2:    []*Inventory{&inventory1},
+			isEqual: false,
+		},
+		{
+			set1:    []*Inventory{&inventory1},
+			set2:    []*Inventory{},
+			isEqual: false,
+		},
+		{
+			set1:    []*Inventory{&inventory1, &inventory2},
+			set2:    []*Inventory{&inventory1},
+			isEqual: false,
+		},
+		{
+			set1:    []*Inventory{&inventory1, &inventory2},
+			set2:    []*Inventory{&inventory3, &inventory4},
+			isEqual: false,
+		},
+		// Empty sets are equal.
+		{
+			set1:    []*Inventory{},
+			set2:    []*Inventory{},
+			isEqual: true,
+		},
+		{
+			set1:    []*Inventory{&inventory1},
+			set2:    []*Inventory{&inventory1},
+			isEqual: true,
+		},
+		// Ordering of the inventory items does not matter for equality.
+		{
+			set1:    []*Inventory{&inventory1, &inventory2},
+			set2:    []*Inventory{&inventory2, &inventory1},
+			isEqual: true,
+		},
+	}
+
+	for _, test := range tests {
+		invSet1 := NewInventorySet(test.set1)
+		invSet2 := NewInventorySet(test.set2)
+		if !invSet1.Equals(invSet2) && test.isEqual {
+			t.Errorf("Expected equal inventory sets; got unequal (%s)/(%s)\n", invSet1, invSet2)
+		}
+		if invSet1.Equals(invSet2) && !test.isEqual {
+			t.Errorf("Expected inequal inventory sets; got equal (%s)/(%s)\n", invSet1, invSet2)
+		}
+	}
+}

cmd/kubectl/kubectlcobra/printer_adapter.go

@@ -0,0 +1,53 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubectlcobra
+
+import (
+	"io"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/cli-runtime/pkg/printers"
+)
+
+// KubectlPrinterAdapter is a workaround for capturing progress from
+// ApplyOptions. ApplyOptions were originally meant to print progress
+// directly using a configurable printer. The KubectlPrinterAdapter
+// plugs into ApplyOptions as a ToPrinter function, but instead of
+// printing the info, it emits it as an event on the provided channel.
+type KubectlPrinterAdapter struct {
+	ch chan<- Event
+}
+
+// resourcePrinterImpl implements the ResourcePrinter interface. But
+// instead of printing, it emits information on the provided channel.
+type resourcePrinterImpl struct {
+	operation string
+	ch        chan<- Event
+}
+
+// PrintObj takes the provided object and operation and emits
+// it on the channel.
+func (r *resourcePrinterImpl) PrintObj(obj runtime.Object, _ io.Writer) error {
+	r.ch <- Event{
+		EventType: ApplyEventType,
+		ApplyEvent: ApplyEvent{
+			Operation: r.operation,
+			Object:    obj,
+		},
+	}
+	return nil
+}
+
+type toPrinterFunc func(string) (printers.ResourcePrinter, error)
+
+// toPrinterFunc returns a function of type toPrinterFunc. This
+// is the type required by the ApplyOptions.
+func (p *KubectlPrinterAdapter) toPrinterFunc() toPrinterFunc {
+	return func(operation string) (printers.ResourcePrinter, error) {
+		return &resourcePrinterImpl{
+			ch:        p.ch,
+			operation: operation,
+		}, nil
+	}
+}

cmd/kubectl/kubectlcobra/printer_adapter_test.go

@@ -0,0 +1,49 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubectlcobra
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	appsv1 "k8s.io/api/apps/v1"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func TestKubectlPrinterAdapter(t *testing.T) {
+	ch := make(chan Event)
+	buffer := bytes.Buffer{}
+	operation := "operation"
+
+	adapter := KubectlPrinterAdapter{
+		ch: ch,
+	}
+
+	toPrinterFunc := adapter.toPrinterFunc()
+	resourcePrinter, err := toPrinterFunc(operation)
+	assert.NoError(t, err)
+
+	deployment := appsv1.Deployment{
+		TypeMeta: v1.TypeMeta{
+			APIVersion: "apps/v1",
+			Kind:       "Deployment",
+		},
+		ObjectMeta: v1.ObjectMeta{
+			Name:      "name",
+			Namespace: "namespace",
+		},
+	}
+
+	// Need to run this in a separate gorutine since go channels
+	// are blocking.
+	go func() {
+		err = resourcePrinter.PrintObj(&deployment, &buffer)
+	}()
+	msg := <-ch
+
+	assert.NoError(t, err)
+	assert.Equal(t, operation, msg.ApplyEvent.Operation)
+	assert.Equal(t, &deployment, msg.ApplyEvent.Object)
+}

cmd/kubectl/kubectlcobra/prune.go

@@ -0,0 +1,258 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// package kubectlcobra contains cobra commands from kubectl
+package kubectlcobra
+
+import (
+	"fmt"
+	"io"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/api/meta"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/cli-runtime/pkg/printers"
+	"k8s.io/cli-runtime/pkg/resource"
+	"k8s.io/client-go/dynamic"
+	"k8s.io/kubectl/pkg/cmd/apply"
+	"k8s.io/kubectl/pkg/cmd/util"
+	"k8s.io/kubectl/pkg/validation"
+)
+
+// PruneOptions encapsulates the necessary information to
+// implement the prune functionality.
+type PruneOptions struct {
+	client    dynamic.Interface
+	builder   *resource.Builder
+	mapper    meta.RESTMapper
+	namespace string
+	// The currently applied objects (as Infos), including the
+	// current grouping object. These objects are used to
+	// calculate the prune set after retreiving the previous
+	// grouping objects.
+	currentGroupingObject *resource.Info
+	// The set of retrieved grouping objects (as Infos) selected
+	// by the grouping label. This set should also include the
+	// current grouping object. Stored here to make testing
+	// easier by manually setting the retrieved grouping infos.
+	pastGroupingObjects      []*resource.Info
+	retrievedGroupingObjects bool
+
+	toPrinter func(string) (printers.ResourcePrinter, error)
+	out       io.Writer
+
+	validator validation.Schema
+
+	// TODO: DeleteOptions--cascade?
+}
+
+// NewPruneOptions returns a struct (PruneOptions) encapsulating the necessary
+// information to run the prune. Returns an error if an error occurs
+// gathering this information.
+// TODO: Add dry-run options.
+func NewPruneOptions(f util.Factory, ao *apply.ApplyOptions) (*PruneOptions, error) {
+
+	po := &PruneOptions{}
+	var err error
+	// Fields copied from ApplyOptions.
+	po.namespace = ao.Namespace
+	po.toPrinter = ao.ToPrinter
+	po.out = ao.Out
+	// Client/Builder fields from the Factory.
+	po.client, err = f.DynamicClient()
+	if err != nil {
+		return nil, err
+	}
+	po.builder = f.NewBuilder()
+	po.mapper, err = f.ToRESTMapper()
+	if err != nil {
+		return nil, err
+	}
+	po.validator, err = f.Validator(false)
+	if err != nil {
+		return nil, err
+	}
+	// Retrieve/store the grouping object for current apply.
+	currentObjects, err := ao.GetObjects()
+	if err != nil {
+		return nil, err
+	}
+	currentGroupingObject, found := findGroupingObject(currentObjects)
+	if !found {
+		return nil, fmt.Errorf("Current grouping object not found during prune.")
+	}
+	po.currentGroupingObject = currentGroupingObject
+	// Initialize past grouping objects as empty.
+	po.pastGroupingObjects = []*resource.Info{}
+	po.retrievedGroupingObjects = false
+
+	return po, nil
+}
+
+// getPreviousGroupingObjects returns the set of grouping objects
+// that have the same label as the current grouping object. Removes
+// the current grouping object from this set. Returns an error
+// if there is a problem retrieving the grouping objects.
+func (po *PruneOptions) getPreviousGroupingObjects() ([]*resource.Info, error) {
+
+	// Ensures the "pastGroupingObjects" is set.
+	if !po.retrievedGroupingObjects {
+		if err := po.retrievePreviousGroupingObjects(); err != nil {
+			return nil, err
+		}
+	}
+
+	// Remove the current grouping info from the previous grouping infos.
+	currentInventory, err := infoToInventory(po.currentGroupingObject)
+	if err != nil {
+		return nil, err
+	}
+	pastGroupInfos := []*resource.Info{}
+	for _, pastInfo := range po.pastGroupingObjects {
+		pastInventory, err := infoToInventory(pastInfo)
+		if err != nil {
+			return nil, err
+		}
+		if !currentInventory.Equals(pastInventory) {
+			pastGroupInfos = append(pastGroupInfos, pastInfo)
+		}
+	}
+	return pastGroupInfos, nil
+}
+
+// retrievePreviousGroupingObjects requests the previous grouping objects
+// using the grouping label from the current grouping object. Sets
+// the field "pastGroupingObjects". Returns an error if the grouping
+// label doesn't exist for the current currentGroupingObject does not
+// exist or if the call to retrieve the past grouping objects fails.
+func (po *PruneOptions) retrievePreviousGroupingObjects() error {
+	// Get the grouping label for this grouping object, and create
+	// a label selector from it.
+	if po.currentGroupingObject == nil || po.currentGroupingObject.Object == nil {
+		return fmt.Errorf("Missing current grouping object.\n")
+	}
+	groupingLabel, err := retrieveGroupingLabel(po.currentGroupingObject.Object)
+	if err != nil {
+		return err
+	}
+	labelSelector := fmt.Sprintf("%s=%s", GroupingLabel, groupingLabel)
+	retrievedGroupingInfos, err := po.builder.
+		Unstructured().
+		// TODO: Check if this validator is necessary.
+		Schema(po.validator).
+		ContinueOnError().
+		NamespaceParam(po.namespace).DefaultNamespace().
+		ResourceTypes("configmap").
+		LabelSelectorParam(labelSelector).
+		Flatten().
+		Do().
+		Infos()
+	if err != nil {
+		return err
+	}
+	po.pastGroupingObjects = retrievedGroupingInfos
+	po.retrievedGroupingObjects = true
+	return nil
+}
+
+// infoToInventory transforms the object represented by the passed "info"
+// into its Inventory representation. Returns error if the passed Info
+// is nil, or the Object in the Info is empty.
+func infoToInventory(info *resource.Info) (*Inventory, error) {
+	if info == nil || info.Object == nil {
+		return nil, fmt.Errorf("Empty resource.Info can not calculate as inventory.\n")
+	}
+	obj := info.Object
+	gk := obj.GetObjectKind().GroupVersionKind().GroupKind()
+	return createInventory(info.Namespace, info.Name, gk)
+}
+
+// unionPastInventory takes a set of grouping objects (infos), returning the
+// union of the objects referenced by these grouping objects as an
+// InventorySet. Returns an error if any of the passed objects are not
+// grouping objects, or if unable to retrieve the inventory from any
+// grouping object.
+func unionPastInventory(infos []*resource.Info) (*InventorySet, error) {
+	inventorySet := NewInventorySet([]*Inventory{})
+	for _, info := range infos {
+		inv, err := retrieveInventoryFromGroupingObj([]*resource.Info{info})
+		if err != nil {
+			return nil, err
+		}
+		inventorySet.AddItems(inv)
+	}
+	return inventorySet, nil
+}
+
+// calcPruneSet returns the InventorySet representing the objects to
+// delete (prune). pastGroupInfos are the set of past applied grouping
+// objects, storing the inventory of the objects applied at the same time.
+// Calculates the prune set as:
+//
+//   prune set = (prev1 U prev2 U ... U prevN) - (curr1, curr2, ..., currN)
+//
+// Returns an error if we are unable to retrieve the set of previously
+// applied objects, or if we are unable to get the currently applied objects
+// from the current grouping object.
+func (po *PruneOptions) calcPruneSet(pastGroupingInfos []*resource.Info) (*InventorySet, error) {
+	pastInventory, err := unionPastInventory(pastGroupingInfos)
+	if err != nil {
+		return nil, err
+	}
+	// Current grouping object as inventory set.
+	c := []*resource.Info{po.currentGroupingObject}
+	currentInv, err := retrieveInventoryFromGroupingObj(c)
+	if err != nil {
+		return nil, err
+	}
+	return pastInventory.Subtract(NewInventorySet(currentInv))
+}
+
+// Prune deletes the set of resources which were previously applied
+// (retrieved from previous grouping objects) but omitted in
+// the current apply. Prune also delete all previous grouping
+// objects. Returns an error if there was a problem.
+func (po *PruneOptions) Prune() error {
+
+	// Retrieve previous grouping objects, and calculate the
+	// union of the previous applies as an inventory set.
+	pastGroupingInfos, err := po.getPreviousGroupingObjects()
+	if err != nil {
+		return err
+	}
+	pruneSet, err := po.calcPruneSet(pastGroupingInfos)
+	if err != nil {
+		return err
+	}
+
+	// Delete the prune objects.
+	for _, inv := range pruneSet.GetItems() {
+		mapping, err := po.mapper.RESTMapping(inv.GroupKind)
+		if err != nil {
+			return err
+		}
+		err = po.client.Resource(mapping.Resource).Namespace(inv.Namespace).Delete(inv.Name, &metav1.DeleteOptions{})
+		if err != nil {
+			return err
+		}
+		fmt.Fprintf(po.out, "%s/%s deleted\n", strings.ToLower(inv.GroupKind.Kind), inv.Name)
+	}
+	// Delete previous grouping objects.
+	for _, pastGroupInfo := range pastGroupingInfos {
+		err = po.client.Resource(pastGroupInfo.Mapping.Resource).
+			Namespace(pastGroupInfo.Namespace).
+			Delete(pastGroupInfo.Name, &metav1.DeleteOptions{})
+		if err != nil {
+			return err
+		}
+		printer, err := po.toPrinter("deleted")
+		if err != nil {
+			return err
+		}
+		if err = printer.PrintObj(pastGroupInfo.Object, po.out); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

cmd/kubectl/kubectlcobra/prune_test.go

@@ -0,0 +1,244 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// package kubectlcobra contains cobra commands from kubectl
+package kubectlcobra
+
+import (
+	"testing"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/cli-runtime/pkg/resource"
+)
+
+var pod1Inv = &Inventory{
+	Namespace: testNamespace,
+	Name:      pod1Name,
+	GroupKind: schema.GroupKind{
+		Group: "",
+		Kind:  "Pod",
+	},
+}
+
+var pod2Inv = &Inventory{
+	Namespace: testNamespace,
+	Name:      pod2Name,
+	GroupKind: schema.GroupKind{
+		Group: "",
+		Kind:  "Pod",
+	},
+}
+
+var pod3Inv = &Inventory{
+	Namespace: testNamespace,
+	Name:      pod3Name,
+	GroupKind: schema.GroupKind{
+		Group: "",
+		Kind:  "Pod",
+	},
+}
+
+var groupingInv = &Inventory{
+	Namespace: testNamespace,
+	Name:      groupingObjName,
+	GroupKind: schema.GroupKind{
+		Group: "",
+		Kind:  "ConfigMap",
+	},
+}
+
+func TestInfoToInventory(t *testing.T) {
+	tests := map[string]struct {
+		info     *resource.Info
+		expected *Inventory
+		isError  bool
+	}{
+		"Nil info is an error": {
+			info:     nil,
+			expected: nil,
+			isError:  true,
+		},
+		"Nil info object is an error": {
+			info:     nilInfo,
+			expected: nil,
+			isError:  true,
+		},
+		"Pod 1 object becomes Pod 1 inventory": {
+			info:     pod1Info,
+			expected: pod1Inv,
+			isError:  false,
+		},
+		"Grouping object becomes grouping inventory": {
+			info:     copyGroupingInfo(),
+			expected: groupingInv,
+			isError:  false,
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			actual, err := infoToInventory(test.info)
+			if test.isError && err == nil {
+				t.Errorf("Did not receive expected error.\n")
+			}
+			if !test.isError {
+				if err != nil {
+					t.Errorf("Receieved unexpected error: %s\n", err)
+				}
+				if !test.expected.Equals(actual) {
+					t.Errorf("Expected inventory (%s), got (%s)\n", test.expected, actual)
+				}
+			}
+		})
+	}
+}
+
+// Returns a grouping object with the inventory set from
+// the passed "children".
+func createGroupingInfo(name string, children ...(*resource.Info)) *resource.Info {
+	groupingObjCopy := groupingObj.DeepCopy()
+	var groupingInfo = &resource.Info{
+		Namespace: testNamespace,
+		Name:      groupingObjName,
+		Object:    groupingObjCopy,
+	}
+	infos := []*resource.Info{groupingInfo}
+	infos = append(infos, children...)
+	_ = addInventoryToGroupingObj(infos)
+	return groupingInfo
+}
+
+func TestUnionPastInventory(t *testing.T) {
+	tests := map[string]struct {
+		groupingInfos []*resource.Info
+		expected      []*Inventory
+	}{
+		"Empty grouping objects = empty inventory set": {
+			groupingInfos: []*resource.Info{},
+			expected:      []*Inventory{},
+		},
+		"No children in grouping object, equals no inventory": {
+			groupingInfos: []*resource.Info{createGroupingInfo("test-1")},
+			expected:      []*Inventory{},
+		},
+		"Grouping object with Pod1 returns inventory with Pod1": {
+			groupingInfos: []*resource.Info{createGroupingInfo("test-1", pod1Info)},
+			expected:      []*Inventory{pod1Inv},
+		},
+		"Grouping object with three pods returns inventory with three pods": {
+			groupingInfos: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info, pod2Info, pod3Info),
+			},
+			expected: []*Inventory{pod1Inv, pod2Inv, pod3Inv},
+		},
+		"Two grouping objects with different pods returns inventory with both pods": {
+			groupingInfos: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info),
+				createGroupingInfo("test-2", pod2Info),
+			},
+			expected: []*Inventory{pod1Inv, pod2Inv},
+		},
+		"Two grouping objects with overlapping pods returns set of pods": {
+			groupingInfos: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info, pod2Info),
+				createGroupingInfo("test-2", pod2Info, pod3Info),
+			},
+			expected: []*Inventory{pod1Inv, pod2Inv, pod3Inv},
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			actual, err := unionPastInventory(test.groupingInfos)
+			expected := NewInventorySet(test.expected)
+			if err != nil {
+				t.Errorf("Unexpected error received: %s\n", err)
+			}
+			if !expected.Equals(actual) {
+				t.Errorf("Expected inventory (%s), got (%s)\n", expected, actual)
+			}
+		})
+	}
+}
+
+func TestCalcPruneSet(t *testing.T) {
+	tests := map[string]struct {
+		past     []*resource.Info
+		current  *resource.Info
+		expected []*Inventory
+		isError  bool
+	}{
+		"Object not unstructured--error": {
+			past:     []*resource.Info{nonUnstructuredGroupingInfo},
+			current:  &resource.Info{},
+			expected: []*Inventory{},
+			isError:  true,
+		},
+		"No past group objects--no prune set": {
+
+			past:     []*resource.Info{},
+			current:  createGroupingInfo("test-1"),
+			expected: []*Inventory{},
+			isError:  false,
+		},
+		"Empty past grouping object--no prune set": {
+			past:     []*resource.Info{createGroupingInfo("test-1")},
+			current:  createGroupingInfo("test-1"),
+			expected: []*Inventory{},
+			isError:  false,
+		},
+		"Pod1 - Pod1 = empty set": {
+			past: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info),
+			},
+			current:  createGroupingInfo("test-1", pod1Info),
+			expected: []*Inventory{},
+			isError:  false,
+		},
+		"(Pod1, Pod2) - Pod1 = Pod2": {
+			past: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info, pod2Info),
+			},
+			current:  createGroupingInfo("test-1", pod1Info),
+			expected: []*Inventory{pod2Inv},
+			isError:  false,
+		},
+		"(Pod1, Pod2) - Pod2 = Pod1": {
+			past: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info, pod2Info),
+			},
+			current:  createGroupingInfo("test-1", pod2Info),
+			expected: []*Inventory{pod1Inv},
+			isError:  false,
+		},
+		"(Pod1, Pod2, Pod3) - Pod2 = Pod1, Pod3": {
+			past: []*resource.Info{
+				createGroupingInfo("test-1", pod1Info, pod2Info),
+				createGroupingInfo("test-1", pod2Info, pod3Info),
+			},
+			current:  createGroupingInfo("test-1", pod2Info),
+			expected: []*Inventory{pod1Inv, pod3Inv},
+			isError:  false,
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			po := &PruneOptions{}
+			po.currentGroupingObject = test.current
+			actual, err := po.calcPruneSet(test.past)
+			expected := NewInventorySet(test.expected)
+			if test.isError && err == nil {
+				t.Errorf("Did not receive expected error.\n")
+			}
+			if !test.isError {
+				if err != nil {
+					t.Errorf("Unexpected error received: %s\n", err)
+				}
+				if !expected.Equals(actual) {
+					t.Errorf("Expected prune set (%s), got (%s)\n", expected, actual)
+				}
+			}
+		})
+	}
+}

cmd/kubectl/kubectlcobra/status.go

@@ -0,0 +1,30 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubectlcobra
+
+import (
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+func NewStatusOptions() *StatusOptions {
+	return &StatusOptions{
+		wait:    false,
+		period:  2 * time.Second,
+		timeout: time.Minute,
+	}
+}
+
+type StatusOptions struct {
+	wait    bool
+	period  time.Duration
+	timeout time.Duration
+}
+
+func (s *StatusOptions) AddFlags(c *cobra.Command) {
+	c.Flags().BoolVar(&s.wait, "status", s.wait, "Wait for all applied resources to reach the Current status.")
+	c.Flags().DurationVar(&s.period, "status-period", s.period, "Polling period for resource statuses.")
+	c.Flags().DurationVar(&s.timeout, "status-timeout", s.timeout, "Timeout threshold for waiting for all resources to reach the Current status.")
+}

cmd/resource/LICENSE_TEMPLATE

@@ -1,2 +0,0 @@
-Copyright {{.Year}} {{.Holder}}
-SPDX-License-Identifier: Apache-2.0

cmd/resource/Makefile

@@ -1,39 +0,0 @@
-# Copyright 2019 The Kubernetes Authors.
-# SPDX-License-Identifier: Apache-2.0
-
-.PHONY: generate license fix vet fmt test build tidy
-
-GOBIN := $(shell go env GOPATH)/bin
-
-build:
-	go build -v -o $(GOBIN)/resource .
-
-all: generate build license fix vet fmt test lint tidy
-
-fix:
-	go fix ./...
-
-fmt:
-	go fmt ./...
-
-generate:
-	(which $(GOBIN)/mdtogo || go get sigs.k8s.io/kustomize/cmd/mdtogo)
-	GOBIN=$(GOBIN) go generate ./...
-
-license:
-	(which $(GOBIN)/addlicense || go get github.com/google/addlicense)
-	$(GOBIN)/addlicense  -y 2019 -c "The Kubernetes Authors." -f LICENSE_TEMPLATE .
-
-tidy:
-	go mod tidy
-
-lint:
-	(which $(GOBIN)/golangci-lint || go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.19.1)
-	$(GOBIN)/golangci-lint run ./...
-
-test:
-	go test -cover ./...
-
-vet:
-	go vet ./...
-

cmd/resource/fixgomod.sh

@@ -1,20 +0,0 @@
-#!/bin/bash
-# Copyright 2019 The Kubernetes Authors.
-# SPDX-License-Identifier: Apache-2.0
-
-set -e
-
-: "${kyaml_major?Need to source VERSIONS}"
-: "${kyaml_minor?Need to source VERSIONS}"
-: "${kyaml_patch?Need to source VERSIONS}"
-
-: "${kstatus_major?Need to source VERSIONS}"
-: "${kstatus_minor?Need to source VERSIONS}"
-: "${kstatus_patch?Need to source VERSIONS}"
-
-
-go mod edit -dropreplace=sigs.k8s.io/kustomize/kyaml@v0.0.0
-go mod edit -require=sigs.k8s.io/kustomize/kyaml@v$kyaml_major.$kyaml_minor.$kyaml_patch
-
-go mod edit -dropreplace=sigs.k8s.io/kustomize/kstatus@v0.0.0
-go mod edit -require=sigs.k8s.io/kustomize/kstatus@v$kstatus_major.$kstatus_minor.$kstatus_patch

cmd/resource/go.mod

@@ -1,22 +0,0 @@
-module sigs.k8s.io/kustomize/cmd/resource
-
-go 1.12
-
-require (
-	github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d
-	github.com/pkg/errors v0.8.1
-	github.com/spf13/cobra v0.0.5
-	github.com/stretchr/testify v1.4.0
-	golang.org/x/net v0.0.0-20191004110552-13f9640d40b9 // indirect
-	k8s.io/api v0.0.0-20190918155943-95b840bb6a1f
-	k8s.io/apimachinery v0.0.0-20190913080033-27d36303b655
-	k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90
-	sigs.k8s.io/controller-runtime v0.4.0
-	sigs.k8s.io/kustomize/kstatus v0.0.0
-	sigs.k8s.io/kustomize/kyaml v0.0.0
-)
-
-replace (
-	sigs.k8s.io/kustomize/kstatus v0.0.0 => ../../kstatus
-	sigs.k8s.io/kustomize/kyaml v0.0.0 => ../../kyaml
-)

cmd/resource/go.sum

@@ -1,435 +0,0 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0 h1:ROfEUZz+Gh5pa62DJWXSaonyu3StP6EA6lPEXPI6mCo=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
-github.com/Azure/go-autorest/autorest v0.9.0 h1:MRvx8gncNaXJqOoLmhNjUAKh33JJF8LyxPhomEtOsjs=
-github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
-github.com/Azure/go-autorest/autorest/adal v0.5.0 h1:q2gDruN08/guU9vAjuPWff0+QIrpH6ediguzdAzXAUU=
-github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
-github.com/Azure/go-autorest/autorest/date v0.1.0 h1:YGrhWfrgtFs84+h0o46rJrlmsZtyZRg470CqAXTZaGM=
-github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
-github.com/Azure/go-autorest/autorest/mocks v0.2.0 h1:Ww5g4zThfD/6cLb4z6xxgeyDa7QDkizMkJKe0ysZXp0=
-github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
-github.com/Azure/go-autorest/logger v0.1.0 h1:ruG4BSDXONFRrZZJ2GUXDiUyVpayPmb1GnWeHDdaNKY=
-github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
-github.com/Azure/go-autorest/tracing v0.5.0 h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=
-github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
-github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
-github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
-github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
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-github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d/go.mod h1:asat636LX7Bqt5lYEZ27JNDcqxfjdBQuJ/MM4CN/Lzo=
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-github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
-github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
-github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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-modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
-modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
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-sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=

cmd/resource/main.go

@@ -1,29 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package main
-
-import (
-	"os"
-
-	"github.com/spf13/cobra"
-
-	"sigs.k8s.io/kustomize/cmd/resource/status"
-
-	// This is here rather than in the libraries because of
-	// https://github.com/kubernetes-sigs/kustomize/issues/2060
-	_ "k8s.io/client-go/plugin/pkg/client/auth"
-)
-
-var root = &cobra.Command{
-	Use:   "resource",
-	Short: "resource reference command",
-}
-
-func main() {
-	root.AddCommand(status.StatusCommand())
-
-	if err := root.Execute(); err != nil {
-		os.Exit(1)
-	}
-}

cmd/resource/status/cmd/util.go

@@ -1,62 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package cmd
-
-import (
-	"k8s.io/apimachinery/pkg/runtime"
-	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
-	ctrl "sigs.k8s.io/controller-runtime"
-	"sigs.k8s.io/controller-runtime/pkg/client"
-	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
-	"sigs.k8s.io/kustomize/kstatus/wait"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-var (
-	scheme = runtime.NewScheme()
-)
-
-func init() {
-	_ = clientgoscheme.AddToScheme(scheme)
-}
-
-type createClientFunc func() (client.Reader, error)
-
-// createClient returns a client for talking to a Kubernetes cluster. The client
-// is from controller-runtime.
-func createClient() (client.Reader, error) {
-	config := ctrl.GetConfigOrDie()
-	mapper, err := apiutil.NewDiscoveryRESTMapper(config)
-	if err != nil {
-		return nil, err
-	}
-	return client.New(config, client.Options{Scheme: scheme, Mapper: mapper})
-}
-
-func newClientFunc(c client.Reader) func() (client.Reader, error) {
-	return func() (client.Reader, error) {
-		return c, nil
-	}
-}
-
-// CaptureIdentifiersFilter implements the Filter interface in the kio package. It
-// captures the identifiers for all resources passed through the pipeline.
-type CaptureIdentifiersFilter struct {
-	Identifiers []wait.ResourceIdentifier
-}
-
-var _ kio.Filter = &CaptureIdentifiersFilter{}
-
-func (f *CaptureIdentifiersFilter) Filter(slice []*yaml.RNode) ([]*yaml.RNode, error) {
-	for i := range slice {
-		meta, err := slice[i].GetMeta()
-		if err != nil {
-			return nil, err
-		}
-		id := meta.GetIdentifier()
-		f.Identifiers = append(f.Identifiers, &id)
-	}
-	return slice, nil
-}

cmd/resource/status/status.go

@@ -1,24 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-//go:generate $GOBIN/mdtogo docs/commands generateddocs/commands --license=none
-
-package status
-
-import (
-	"github.com/spf13/cobra"
-	"sigs.k8s.io/kustomize/cmd/resource/status/cmd"
-)
-
-func StatusCommand() *cobra.Command {
-	var status = &cobra.Command{
-		Use:   "status",
-		Short: "[Alpha] Commands for working with resource status.",
-	}
-
-	status.AddCommand(cmd.FetchCommand())
-	status.AddCommand(cmd.WaitCommand())
-	status.AddCommand(cmd.EventsCommand())
-
-	return status
-}

docs/authoring.md

@@ -34,4 +34,4 @@ With an existing kustomization file the `kustomize edit` command
 * add
 * set
 * remove
-* fix
+* fix

docs/fields.md

@@ -44,7 +44,7 @@ What transformations (customizations) should be applied?
 | Field  | Type  | Explanation |
 |---|---|---|
 | [commonLabels](#commonlabels) | string | Adds labels and some corresponding label selectors to all resources. |
-| [commonAnnotations](#commonannotations) | string | Adds annotions (non-identifying metadata) to add all resources. |
+| [commonAnnotations](#commonannotations) | string | Adds annotations (non-identifying metadata) to add all resources. |
 | [images](#images) | list | Images modify the name, tags and/or digest for images without creating patches. |
 | [inventory](#inventory) | struct | Specify an object who's annotations will contain a build result summary. |
 | [namespace](#namespace)   | string | Adds namespace to all resources |

docs/howItWorks.md

@@ -0,0 +1,51 @@
+# How does `kustomize build` work
+
+Call stack when running `kustomize build`, with links to code.
+
+## Run build
+
+* [RunBuild](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/kustomize/internal/commands/build/build.go#L121)
+  * [MakeKustomizer](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/krusty/kustomizer.go#L32)
+  * [Run](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/krusty/kustomizer.go#L47): performs a kustomization. It uses its internal filesystem reference to read the file at the given path argument, interpret it as a kustomization.yaml file, perform the kustomization it represents, and return the resulting resources.
+    * Create factories
+      * [tranformer.NewFactoryImpl](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/k8sdeps/transformer/factory.go#L17)
+      * [resmap.NewFactory](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/resmap/factory.go#L21)
+        * [resource.NewFactory](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/resource/factory.go#L23)
+          * [kustruct.NewKunstructuredFactoryImpl](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/k8sdeps/kunstruct/factory.go#L28)
+      * [loader.NewLoader](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/loader/loader.go#L19)
+      * [validator.NewKustValidator](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/k8sdeps/validator/validators.go#L23)
+    * [NewKustTarget](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L38)
+    * [Load](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L54)
+    * [MakeCustomizeResMap](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L109): details in next section
+  * [emitResources](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/kustomize/internal/commands/build/build.go#L143)
+
+## Make resource map
+
+* [makeCustomizeResMap](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L117)
+  * [AccumulateTarget](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L196): returns a new ResAccumulator, holding customized resources and the data/rules used to do so. The name back references and vars are not yet fixed.
+    * [accummulateResources](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L302): fills the given resourceAccumulator with resources read from the given list of paths.
+    * Merge config from builtin and CRDs
+    * [runGenerators](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L239)
+      * [configureBuiltinGenerators](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget_configplugin.go#L28)
+        * ConfigMapGenerator
+        * SecretGenerator
+      * [configureExternalGenerators]()
+      * Iterate all generators
+    * [runTransfomers](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L274)
+      * [configureBuiltinTransformers](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget_configplugin.go#L44)
+        *	PatchStrategicMergeTransformer
+        * PatchTransformer
+        * NamespaceTransformer
+        * PrefixSuffixTransformer
+        * LabelTransformer
+        * AnnotationsTransformer
+        * PatchJson6902Transformer
+        * ReplicaCountTransformer
+        * ImageTagTransformer
+      * [configureExternalTransformers](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L291)
+    * [MergeVars](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/accumulator/resaccumulator.go#L64)
+  * The following steps must be done last, not as part of the recursion implicit in AccumulateTarget.
+    * [addHashesToNames](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L153)
+    * [FixBackReferences](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/accumulator/resaccumulator.go#L160): Given that names have changed (prefixs/suffixes added), fix all the back references to those names.
+    * [ResolveVars](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/accumulator/resaccumulator.go#L141)
+    * [computeInventory](https://github.com/kubernetes-sigs/kustomize/blob/c7d78970fb86782dbdded3a93944b774f826071f/api/internal/target/kusttarget.go#L163)

examples/alphaTestExamples/MultipleDeployments.md

@@ -0,0 +1,152 @@
+[kind]: https://github.com/kubernetes-sigs/kind
+
+# Demo: Multiple Deployments
+
+This demo helps you to multiple services on same kubenetes cluster using kustomize.
+
+Steps:
+1. Create the resources files for wordpress service.
+2. Create the resources files for mysql service.
+3. Spin-up kubernetes cluster on local using [kind].
+4. Deploy the wordpress app using kustomize and verify the status.
+5. Deploy the mysql app using kustomize on same "kind" cluster and verify the status.
+6. Add and remove a resource to mysql service and verify prune.
+
+First define a place to work:
+
+<!-- @makeWorkplace @testE2EAgainstLatestRelease -->
+```
+DEMO_HOME=$(mktemp -d)
+```
+
+Alternatively, use
+
+> ```
+> DEMO_HOME=~/hello
+> ```
+
+## Establish the base
+
+<!-- @createBase @testE2EAgainstLatestRelease -->
+```
+BASE=$DEMO_HOME/base
+mkdir -p $BASE
+OUTPUT=$DEMO_HOME/output
+mkdir -p $OUTPUT
+
+mkdir $BASE/wordpress
+mkdir $BASE/mysql
+
+curl -s -o "$BASE/wordpress/#1.yaml" "https://raw.githubusercontent.com\
+/kubernetes-sigs/kustomize\
+/master/examples/wordpress/wordpress\
+/{deployment,kustomization,service}.yaml"
+
+curl -s -o "$BASE/mysql/#1.yaml" "https://raw.githubusercontent.com\
+/kubernetes-sigs/kustomize\
+/master/examples/wordpress/mysql\
+/{secret,deployment,kustomization,service}.yaml"
+```
+
+Create a `grouping.yaml` resource. By this, you are defining the grouping of the current directory, `mysql`. Kustomize uses the unique label in this file to track any future state changes made to this directory. Make sure the label key is `kustomize.config.k8s.io/inventory-id` and give any unique label value and DO NOT change it in future.
+<!-- @createGroupingYaml @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/mysql/grouping.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: inventory-map
+  labels:
+    kustomize.config.k8s.io/inventory-id: mysql-app
+EOF
+```
+
+Delete any existing kind cluster and create a new one. By default the name of the cluster is "kind"
+<!-- @deleteAndCreateKindCluster @testE2EAgainstLatestRelease -->
+```
+kind delete cluster
+kind create cluster
+```
+
+Let's run the wordpress and mysql services.
+<!-- @RunWordpressAndMysql @testE2EAgainstLatestRelease -->
+```
+export KUSTOMIZE_ENABLE_ALPHA_COMMANDS=true
+
+kustomize resources apply $BASE/mysql --status;
+
+status=$(mktemp);
+kustomize status fetch $BASE/mysql > $OUTPUT/status
+
+test 1 == \
+  $(grep "mysql" $OUTPUT/status | grep "Deployment is available. Replicas: 1" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "mysql-pass" $OUTPUT/status | grep "Resource is always ready" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "mysql" $OUTPUT/status | grep "Service is ready" | wc -l); \
+  echo $?
+
+kustomize resources apply $BASE/wordpress --status;
+
+status=$(mktemp);
+kustomize status fetch $BASE/wordpress > $OUTPUT/status
+
+test 1 == \
+  $(grep "wordpress" $OUTPUT/status | grep "Deployment is available. Replicas: 1" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "wordpress" $OUTPUT/status | grep "Service is ready" | wc -l); \
+  echo $?
+```
+
+Let's replace the secret resource from mysql service and verify prune and addition of resource.
+<!-- @ReplaceResourceInMysql @testE2EAgainstLatestRelease -->
+
+```
+cat <<EOF >$BASE/mysql/secret2.yaml
+apiVersion: v1
+kind: Secret
+metadata:
+  name: mysql-pass2
+type: Opaque
+data:
+  # Default password is "admin".
+  password: YWRtaW5=
+EOF
+
+rm $BASE/mysql/secret.yaml
+
+sed -i.bak 's/secret/secret2/' \
+    $BASE/mysql/kustomization.yaml
+
+sed -i.bak 's/mysql-pass/mysql-pass2/' \
+    $BASE/mysql/deployment.yaml
+
+kustomize resources apply $BASE/mysql --status;
+
+status=$(mktemp);
+kustomize status fetch $BASE/mysql > $OUTPUT/status
+
+test 1 == \
+  $(grep "mysql" $OUTPUT/status | grep "Deployment is available. Replicas: 1" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "mysql-pass2" $OUTPUT/status | grep "Resource is always ready" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "mysql" $OUTPUT/status | grep "Service is ready" | wc -l); \
+  echo $?
+```
+
+Clean-up the cluster 
+<!-- @deleteKindCluster @testE2EAgainstLatestRelease -->
+```
+kind delete cluster
+```

examples/alphaTestExamples/helloapp.md

@@ -0,0 +1,240 @@
+[hello]: https://github.com/monopole/hello
+[kind]: https://github.com/kubernetes-sigs/kind
+[helloWorld]: https://github.com/kubernetes-sigs/kustomize/tree/master/examples/helloWorld
+
+# Demo: hello app
+
+This demo helps you to deploy an example hello app end-to-end using kustomize.
+
+Steps:
+1. Create the resources files.
+2. Kustomize them.
+3. Spin-up kubernetes cluster on local using [kind].
+4. Deploy the app using kustomize and verify the status.
+
+First define a place to work:
+
+<!-- @makeWorkplace @testE2EAgainstLatestRelease-->
+```
+DEMO_HOME=$(mktemp -d)
+```
+
+Alternatively, use
+
+> ```
+> DEMO_HOME=~/hello
+> ```
+
+## Establish the base
+
+Let's run the [hello] service.
+
+<!-- @createBase @testE2EAgainstLatestRelease-->
+```
+BASE=$DEMO_HOME/base
+mkdir -p $BASE
+OUTPUT=$DEMO_HOME/output
+mkdir -p $OUTPUT
+```
+
+Now lets add a simple config map resource to the `base`
+
+<!-- @createConfigMapYaml @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/configMap.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map
+data:
+  altGreeting: "Good Morning!"
+  enableRisky: "false"
+EOF
+```
+
+Create `deployment.yaml` with any image and with desired number of replicas
+
+<!-- @createDeploymentYaml @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: the-deployment
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        deployment: hello
+    spec:
+      containers:
+      - name: the-container
+        image: monopole/hello:1
+        command: ["/hello",
+                  "--port=8080",
+                  "--enableRiskyFeature=\$(ENABLE_RISKY)"]
+        ports:
+        - containerPort: 8080
+        env:
+        - name: ALT_GREETING
+          valueFrom:
+            configMapKeyRef:
+              name: the-map
+              key: altGreeting
+        - name: ENABLE_RISKY
+          valueFrom:
+            configMapKeyRef:
+              name: the-map
+              key: enableRisky
+EOF
+```
+
+Create `service.yaml` pointing to the deployment created above
+
+<!-- @createServiceYaml @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/service.yaml
+kind: Service
+apiVersion: v1
+metadata:
+  name: the-service
+spec:
+  selector:
+    deployment: hello
+  type: LoadBalancer
+  ports:
+  - protocol: TCP
+    port: 8666
+    targetPort: 8080
+EOF
+```
+
+Create a `grouping.yaml` resource. By this, you are defining the grouping of the current directory, `base`. Kustomize uses the unique label in this file to track any future state changes made to this directory. Make sure the label key is `kustomize.config.k8s.io/inventory-id` and give any unique label value and DO NOT change it in future.
+
+<!-- @createGroupingYaml @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/grouping.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: inventory-map
+  labels:
+    kustomize.config.k8s.io/inventory-id: hello-app
+EOF
+```
+
+Now, create `kustomization.yaml` add all your resources.
+
+<!-- @createKustomizationYaml @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/kustomization.yaml
+commonLabels:
+  app: hello
+
+resources:
+- deployment.yaml
+- service.yaml
+- configMap.yaml
+- grouping.yaml
+EOF
+```
+
+### The Base Kustomization
+
+The `base` directory has a kustomization file:
+
+<!-- @showKustomization @testE2EAgainstLatestRelease -->
+```
+more $BASE/kustomization.yaml
+```
+
+### Customize the base
+
+A simple customization step could be to change the _app
+label_ applied to all resources:
+
+<!-- @addLabel @testE2EAgainstLatestRelease -->
+```
+sed -i.bak 's/app: hello/app: my-hello/' \
+    $BASE/kustomization.yaml
+```
+
+The following requires installation of [kind].
+
+Delete any existing kind cluster and create a new one. By default the name of the cluster is "kind"
+<!-- @deleteAndCreateKindCluster @testE2EAgainstLatestRelease -->
+```
+kind delete cluster
+kind create cluster
+```
+
+Use the kustomize binary in MYGOBIN to apply a deployment, fetch the status and verify the status.
+<!-- @runHelloApp @testE2EAgainstLatestRelease -->
+```
+export KUSTOMIZE_ENABLE_ALPHA_COMMANDS=true
+
+kustomize resources apply $BASE --status;
+
+kustomize status fetch $BASE > $OUTPUT/status
+
+test 1 == \
+  $(grep "the-deployment" $OUTPUT/status | grep "Deployment is available. Replicas: 3" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "the-map" $OUTPUT/status | grep "Resource is always ready" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "the-service" $OUTPUT/status | grep "Service is ready" | wc -l); \
+  echo $?
+```
+
+Now let's replace the configMap with configMap2 apply the config, fetch and verify the status. This should delete the-map from deployment and add the-map2.
+<!-- @replaceConfigMapInHello @testE2EAgainstLatestRelease -->
+```
+cat <<EOF >$BASE/configMap2.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map2
+data:
+  altGreeting: "Good Evening!"
+  enableRisky: "false"
+EOF
+
+rm $BASE/configMap.yaml
+
+sed -i.bak 's/configMap/configMap2/' \
+    $BASE/kustomization.yaml
+
+sed -i.bak 's/the-map/the-map2/' \
+    $BASE/deployment.yaml
+
+kustomize resources apply $BASE --status;
+
+status=$(mktemp);
+kustomize status fetch $BASE > $OUTPUT/status
+
+test 1 == \
+  $(grep "the-deployment" $OUTPUT/status | grep "Deployment is available. Replicas: 3" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "the-map2" $OUTPUT/status | grep "Resource is always ready" | wc -l); \
+  echo $?
+
+test 1 == \
+  $(grep "the-service" $OUTPUT/status | grep "Service is ready" | wc -l); \
+  echo $?
+```
+
+Clean-up the cluster 
+<!-- @deleteKindCluster @testE2EAgainstLatestRelease -->
+```
+kind delete cluster
+```
+
+### Next Exercise
+Create overlays as described in the [helloWorld] section and verify the results.

examples/zh/README.md

@@ -48,14 +48,14 @@ go get sigs.k8s.io/kustomize/v3/cmd/kustomize
 
  * [hello world](helloWorld.md) - 部署多个不同配置的 Hello World 服务。
 
- * [LDAP](../ldap/README.md) - 部署多个配置不同的 LDAP 服务。
+ * [LDAP](ldap.md) - 部署多个配置不同的 LDAP 服务。
 
- * [springboot](../springboot/README.md) - 从头开始创建一个 Spring Boot 项目的生产配置。
+ * [springboot](springboot.md) - 从头开始创建一个 Spring Boot 项目的生产配置。
 
- * [mySql](../mySql/README.md) - 从头开始创建一个 MySQL 的生产配置。
+ * [mySql](mysql.md) - 从头开始创建一个 MySQL 的生产配置。
 
- * [breakfast](../breakfast.md) - 给 Alice 和 Bob 定制一顿早餐 :)
+ * [breakfast](breakfast.md) - 给 Alice 和 Bob 定制一顿早餐 :)
 
- * [multibases](../multibases/README.md) - 使用相同的 base 生成三个 variants（dev，staging，production）。
+ * [multibases](multibases.md) - 使用相同的 base 生成三个 variants（dev，staging，production）。
 
 >声明：部分文档可能稍微滞后于英文版本，同步工作持续进行中

examples/zh/breakfast.md

@@ -0,0 +1,118 @@
+[kubernetes API 对象样式]: https://kubernetes.io/docs/concepts/overview/working-with-objects/kubernetes-objects/#required-fields
+[variant]: ../../docs/glossary.md#variant
+
+# 示例：早餐配置
+
+定义一个工作空间：
+
+<!-- @makeWorkplace @testAgainstLatestRelease -->
+```
+DEMO_HOME=$(mktemp -d)
+```
+
+创建目录用于存放早餐的 base 配置：
+
+<!-- @baseDir @testAgainstLatestRelease -->
+```
+mkdir -p $DEMO_HOME/breakfast/base
+```
+
+创建一个 `kustomization` 来定义早餐所需的食物。包含咖啡和薄煎饼：
+
+<!-- @baseKustomization @testAgainstLatestRelease -->
+```
+cat <<EOF >$DEMO_HOME/breakfast/base/kustomization.yaml
+resources:
+- coffee.yaml
+- pancakes.yaml
+EOF
+```
+
+这里有一个 _coffee_ 类型。定义`kind`和 `metdata/name` 字段以符合 [kubernetes API 对象样式]，不需要其他文件或定义：
+
+<!-- @coffee @testAgainstLatestRelease -->
+```
+cat <<EOF >$DEMO_HOME/breakfast/base/coffee.yaml
+kind: Coffee
+metadata:
+  name: morningCup
+temperature: lukewarm
+data:
+  greeting: "Good Morning!"
+EOF
+```
+
+`name` 字段仅将这种咖啡实例与其他实例（如果有的话）区分开
+
+同样，定义 _pancakes_：
+<!-- @pancakes @testAgainstLatestRelease -->
+```
+cat <<EOF >$DEMO_HOME/breakfast/base/pancakes.yaml
+kind: Pancakes
+metadata:
+  name: comfort
+stacksize: 3
+topping: none
+EOF
+```
+
+为喜欢热咖啡的 Alice 定制她的早餐：
+
+<!-- @aliceOverlay @testAgainstLatestRelease -->
+```
+mkdir -p $DEMO_HOME/breakfast/overlays/alice
+
+cat <<EOF >$DEMO_HOME/breakfast/overlays/alice/kustomization.yaml
+commonLabels:
+  who: alice
+resources:
+- ../../base
+patchesStrategicMerge:
+- temperature.yaml
+EOF
+
+cat <<EOF >$DEMO_HOME/breakfast/overlays/alice/temperature.yaml
+kind: Coffee
+metadata:
+  name: morningCup
+temperature: hot!
+EOF
+```
+
+同样的，Bob 想要 _5_ 块薄煎饼和草莓：
+
+<!-- @bobOverlay @testAgainstLatestRelease -->
+```
+mkdir -p $DEMO_HOME/breakfast/overlays/bob
+
+cat <<EOF >$DEMO_HOME/breakfast/overlays/bob/kustomization.yaml
+commonLabels:
+  who: bob
+resources:
+- ../../base
+patchesStrategicMerge:
+- topping.yaml
+EOF
+
+cat <<EOF >$DEMO_HOME/breakfast/overlays/bob/topping.yaml
+kind: Pancakes
+metadata:
+  name: comfort
+stacksize: 5
+topping: strawberries
+EOF
+```
+
+现在，可以为 Alice 的早餐生成配置了：
+
+<!-- @generateAlice @testAgainstLatestRelease -->
+```
+kustomize build $DEMO_HOME/breakfast/overlays/alice
+```
+
+同样的，也为 Bob  的早餐生成配置：
+
+<!-- @generateBob @testAgainstLatestRelease -->
+```
+kustomize build $DEMO_HOME/breakfast/overlays/bob
+```