Grep with subpackages

cmd/config/internal/commands/grep.go

@@ -5,10 +5,12 @@ package commands
 
 import (
 	"fmt"
+	"io"
 	"strings"
 
 	"github.com/spf13/cobra"
 	"k8s.io/apimachinery/pkg/api/resource"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
 	"sigs.k8s.io/kustomize/kyaml/kio"
 	"sigs.k8s.io/kustomize/kyaml/kio/filters"
@@ -18,13 +20,13 @@ import (
 func GetGrepRunner(name string) *GrepRunner {
 	r := &GrepRunner{}
 	c := &cobra.Command{
-		Use:     "grep QUERY [DIR]...",
+		Use:     "grep QUERY [DIR]",
 		Short:   commands.GrepShort,
 		Long:    commands.GrepLong,
 		Example: commands.GrepExamples,
 		PreRunE: r.preRunE,
 		RunE:    r.runE,
-		Args:    cobra.MinimumNArgs(1),
+		Args:    cobra.MaximumNArgs(2),
 	}
 	fixDocs(name, c)
 	c.Flags().BoolVar(&r.IncludeSubpackages, "include-subpackages", true,
@@ -33,7 +35,8 @@ func GetGrepRunner(name string) *GrepRunner {
 		"annotate resources with their file origins.")
 	c.Flags().BoolVarP(&r.InvertMatch, "invert-match", "", false,
 		"Selected Resources are those not matching any of the specified patterns..")
-
+	c.Flags().BoolVarP(&r.RecurseSubPackages, "recurse-subpackages", "R", true,
+		"also print resources recursively in all the nested subpackages")
 	r.Command = c
 	return r
 }
@@ -48,7 +51,8 @@ type GrepRunner struct {
 	KeepAnnotations    bool
 	Command            *cobra.Command
 	filters.GrepFilter
-	Format bool
+	Format             bool
+	RecurseSubPackages bool
 }
 
 func (r *GrepRunner) preRunE(c *cobra.Command, args []string) error {
@@ -101,25 +105,56 @@ func (r *GrepRunner) preRunE(c *cobra.Command, args []string) error {
 }
 
 func (r *GrepRunner) runE(c *cobra.Command, args []string) error {
-	var filters = []kio.Filter{r.GrepFilter}
-
-	var inputs []kio.Reader
-	for _, a := range args[1:] {
-		inputs = append(inputs, kio.LocalPackageReader{
-			PackagePath:        a,
-			IncludeSubpackages: r.IncludeSubpackages,
-		})
-	}
-	if len(inputs) == 0 {
-		inputs = append(inputs, &kio.ByteReader{Reader: c.InOrStdin()})
+	if len(args) == 1 {
+		input := &kio.ByteReader{Reader: c.InOrStdin()}
+		return handleError(c, kio.Pipeline{
+			Inputs:  []kio.Reader{input},
+			Filters: []kio.Filter{r.GrepFilter},
+			Outputs: []kio.Writer{kio.ByteWriter{
+				Writer:                c.OutOrStdout(),
+				KeepReaderAnnotations: r.KeepAnnotations,
+			}},
+		}.Execute())
 	}
 
-	return handleError(c, kio.Pipeline{
-		Inputs:  inputs,
-		Filters: filters,
+	e := executeCmdOnPkgs{
+		writer:             c.OutOrStdout(),
+		needOpenAPI:        false,
+		recurseSubPackages: r.RecurseSubPackages,
+		cmdRunner:          r,
+		rootPkgPath:        args[1],
+	}
+
+	return e.execute()
+
+}
+
+func (r *GrepRunner) executeCmd(w io.Writer, pkgPath string) error {
+	openAPIFileName, err := ext.OpenAPIFileName()
+	if err != nil {
+		return err
+	}
+
+	input := kio.LocalPackageReader{PackagePath: pkgPath, PackageFileName: openAPIFileName}
+
+	fmt.Fprintf(w, "%q:\n", pkgPath)
+	err = kio.Pipeline{
+		Inputs:  []kio.Reader{input},
+		Filters: []kio.Filter{r.GrepFilter},
 		Outputs: []kio.Writer{kio.ByteWriter{
-			Writer:                c.OutOrStdout(),
+			Writer:                w,
 			KeepReaderAnnotations: r.KeepAnnotations,
 		}},
-	}.Execute())
+	}.Execute()
+
+	if err != nil {
+		// return err if there is only package
+		if !r.RecurseSubPackages {
+			return err
+		} else {
+			// print error message and continue if there are multiple packages to annotate
+			fmt.Fprintf(w, "%s in package %q\n", err.Error(), pkgPath)
+		}
+	}
+	return nil
 }