Prevent cyclical Kustomize calls

While Kustomize already has cycle detection and we don't enable our
Policy Generator plugin in the internal Kustomize instance so it won't
work anyway, I figured this message would be clearer than a
"PolicyGenerator plugin isn't available" message.

Signed-off-by: Dale Haiducek <[email protected]>

Author: dhaiducek

cmd/main.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path"
 
 	"github.com/spf13/pflag"
 	"open-cluster-management.io/ocm-kustomize-generator-plugins/internal"
@@ -67,7 +66,7 @@ func processGeneratorConfig(filePath string) []byte {
 		errorAndExit("failed to read file '%s': %s", filePath, err)
 	}
 
-	err = p.Config(fileData, path.Dir(cwd))
+	err = p.Config(fileData, cwd)
 	if err != nil {
 		errorAndExit("error processing the PolicyGenerator file '%s': %s", filePath, err)
 	}

internal/utils.go

@@ -438,6 +438,13 @@ func verifyManifestPath(baseDirectory string, manifestPath string) error {
 		)
 	}
 
+	if relPath == "." {
+		return fmt.Errorf(
+			"the manifest path %s may not refer to the same directory as the kustomization.yaml file",
+			manifestPath,
+		)
+	}
+
 	parDir := ".." + string(filepath.Separator)
 	if strings.HasPrefix(relPath, parDir) || relPath == ".." {
 		return fmt.Errorf(

internal/utils_test.go

@@ -1264,6 +1264,20 @@ func TestVerifyManifestPath(t *testing.T) {
 				baseDirectory,
 			),
 		},
+		{
+			workingDir,
+			fmt.Sprintf(
+				"the manifest path %s may not refer to the same directory as the kustomization.yaml file",
+				workingDir,
+			),
+		},
+		{
+			".",
+			fmt.Sprintf(
+				"the manifest path %s may not refer to the same directory as the kustomization.yaml file",
+				".",
+			),
+		},
 		{
 			otherManifestPath,
 			fmt.Sprintf(