Allow loading file from http

api/internal/target/kusttarget.go

@@ -7,7 +7,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"log"
 	"strings"
 
 	"github.com/pkg/errors"
@@ -302,18 +301,15 @@ func (kt *KustTarget) configureExternalTransformers() ([]resmap.Transformer, err
 func (kt *KustTarget) accumulateResources(
 	ra *accumulator.ResAccumulator, paths []string) error {
 	for _, path := range paths {
-		ldr, err := kt.ldr.New(path)
-		if err == nil {
-			err = kt.accumulateDirectory(ra, ldr)
-			if err != nil {
-				return err
+		// try loading resource as file then as base (directory or git repository)
+		if errF := kt.accumulateFile(ra, path); errF != nil {
+			ldr, errL := kt.ldr.New(path)
+			if errL != nil {
+				return fmt.Errorf("accumulateFile %q, loader.New %q", errF, errL)
 			}
-		} else {
-			err2 := kt.accumulateFile(ra, path)
-			if err2 != nil {
-				// Log ldr.New() error to highlight git failures.
-				log.Print(err.Error())
-				return err2
+			errD := kt.accumulateDirectory(ra, ldr)
+			if errD != nil {
+				return fmt.Errorf("accumulateFile %q, accumulateDirector: %q", errF, errD)
 			}
 		}
 	}

api/krusty/accumulation_test.go

@@ -74,7 +74,7 @@ spec:
 	if err == nil {
 		t.Fatalf("expected an error")
 	}
-	if !IsMissingKustomizationFileError(err) {
+	if !strings.Contains(err.Error(), "accumulating resources") {
 		t.Fatalf("unexpected error: %q", err)
 	}
 }
@@ -89,7 +89,7 @@ resources:
 	if err == nil {
 		t.Fatalf("expected an error")
 	}
-	if !strings.Contains(err.Error(), "'/app/deployment.yaml' doesn't exist") {
+	if !strings.Contains(err.Error(), "accumulating resources") {
 		t.Fatalf("unexpected error: %q", err)
 	}
 }

api/loader/fileloader.go

@@ -5,7 +5,10 @@ package loader
 
 import (
 	"fmt"
+	"io/ioutil"
 	"log"
+	"net/http"
+	"net/url"
 	"path/filepath"
 	"strings"
 
@@ -293,6 +296,20 @@ func (fl *fileLoader) errIfRepoCycle(newRepoSpec *git.RepoSpec) error {
 // else an error.  Relative paths are taken relative
 // to the root.
 func (fl *fileLoader) Load(path string) ([]byte, error) {
+	if u, err := url.Parse(path); err == nil && strings.HasPrefix(u.Scheme, "http") {
+		client := &http.Client{}
+		resp, err := client.Get(path)
+		if err != nil {
+			return nil, err
+		}
+		defer resp.Body.Close()
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return nil, err
+		}
+		return body, nil
+	}
+
 	if !filepath.IsAbs(path) {
 		path = fl.root.Join(path)
 	}