Remove plugins packages from external API.

api/internal/target/kusttarget.go

@@ -13,12 +13,12 @@ import (
 	"strings"
 
 	"github.com/pkg/errors"
+	"sigs.k8s.io/kustomize/api/builtins"
 	"sigs.k8s.io/kustomize/api/ifc"
 	"sigs.k8s.io/kustomize/api/internal/accumulator"
 	"sigs.k8s.io/kustomize/api/konfig"
 	"sigs.k8s.io/kustomize/api/plugins/builtinconfig"
 	"sigs.k8s.io/kustomize/api/plugins/builtinhelpers"
-	"sigs.k8s.io/kustomize/api/plugins/builtins"
 	"sigs.k8s.io/kustomize/api/plugins/loader"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/transform"

api/krusty/kustomizer.go

@@ -4,13 +4,13 @@
 package krusty
 
 import (
+	"sigs.k8s.io/kustomize/api/builtins"
 	"sigs.k8s.io/kustomize/api/filesys"
 	"sigs.k8s.io/kustomize/api/internal/target"
 	"sigs.k8s.io/kustomize/api/k8sdeps/kunstruct"
 	"sigs.k8s.io/kustomize/api/k8sdeps/transformer"
 	"sigs.k8s.io/kustomize/api/k8sdeps/validator"
 	fLdr "sigs.k8s.io/kustomize/api/loader"
-	"sigs.k8s.io/kustomize/api/plugins/builtins"
 	pLdr "sigs.k8s.io/kustomize/api/plugins/loader"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/resource"

api/plugins/builtinhelpers/builtins.go

@@ -4,7 +4,7 @@
 package builtinhelpers
 
 import (
-	"sigs.k8s.io/kustomize/api/plugins/builtins"
+	"sigs.k8s.io/kustomize/api/builtins"
 	"sigs.k8s.io/kustomize/api/resmap"
 )
 

api/plugins/builtinhelpers/generateBuiltins.sh

@@ -3,7 +3,7 @@
 # Generate the Go code for the generator and
 # transformer factory functions in
 #
-#   sigs.k8s.io/kustomize/api/plugins/builtins
+#   sigs.k8s.io/kustomize/api/builtins
 #
 # from the raw plugin directories found under
 #

api/plugins/compiler/compiler.go

@@ -4,6 +4,7 @@
 package compiler
 
 import (
+	"bytes"
 	"fmt"
 	"os"
 	"os/exec"
@@ -12,6 +13,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
 	"sigs.k8s.io/kustomize/api/filesys"
 	"sigs.k8s.io/kustomize/api/konfig"
 )
@@ -118,10 +120,12 @@ func (b *Compiler) Compile(g, v, k string) error {
 			"cannot find go compiler %s", goBin)
 	}
 	cmd := exec.Command(goBin, commands...)
+	var stderr bytes.Buffer
+	cmd.Stderr = &stderr
 	cmd.Env = os.Environ()
 	if err := cmd.Run(); err != nil {
-		return fmt.Errorf(
-			"compiler error building %s: %v", srcFile, err)
+		return errors.Wrapf(
+			err, "cannot compile %s:\nSTDERR\n%s\n", srcFile, stderr.String())
 	}
 	return nil
 }