check all existing index (#751)

* check all existing index

Signed-off-by: ye.sijun <[email protected]>

* update error message

Signed-off-by: ye.sijun <[email protected]>

* add test case covering usage without default index

Co-authored-by: Ahmet Alp Balkan <[email protected]>

Author: junnplus

cmd/krew/cmd/root.go

@@ -17,6 +17,7 @@ package cmd
 import (
 	"flag"
 	"fmt"
+	"io/ioutil"
 	"math/rand"
 	"os"
 	"strings"
@@ -209,11 +210,24 @@ func cleanupStaleKrewInstallations() error {
 }
 
 func checkIndex(_ *cobra.Command, _ []string) error {
-	if ok, err := gitutil.IsGitCloned(paths.IndexPath(constants.DefaultIndexName)); err != nil {
-		return errors.Wrap(err, "failed to check local index git repository")
-	} else if !ok {
+	entries, err := ioutil.ReadDir(paths.IndexBase())
+	if err != nil {
+		return errors.Wrap(err, "failed to list directory")
+	}
+	if len(entries) == 0 {
 		return errors.New(`krew local plugin index is not initialized (run "kubectl krew update")`)
 	}
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+		indexPath := paths.IndexPath(e.Name())
+		if ok, err := gitutil.IsGitCloned(indexPath); err != nil {
+			return errors.Wrap(err, "failed to check local index git repository")
+		} else if !ok {
+			return errors.Errorf("invalid index %q, non git directory found in index folder", e.Name())
+		}
+	}
 	return nil
 }
 

integration_test/index_test.go

@@ -213,6 +213,17 @@ func TestKrewDefaultIndex_AutoAddedOnUpgrade(t *testing.T) {
 	ensureIndexListHasDefaultIndex(t, string(test.Krew("index", "list").RunOrFailOutput()))
 }
 
+func TestKrewOnlyCustomIndex(t *testing.T) {
+	skipShort(t)
+	test := NewTest(t)
+	out, err := test.Krew("list").Run()
+	if err == nil {
+		t.Fatalf("list should've failed without default index output=%s", string(out))
+	}
+	test.Krew("index", "add", "custom-index", constants.DefaultIndexURI).RunOrFail()
+	test.Krew("list").RunOrFail()
+}
+
 func ensureIndexListHasDefaultIndex(t *testing.T, output string) {
 	t.Helper()
 	if !regexp.MustCompile(`(?m)^default\b`).MatchString(output) {