feat(helm): adding --name to update single repo

Signed-off-by: Deepak Sattiraju <desattir@microsoft.com>

Lint
Signed-off-by: ds-ms <desattir@microsoft.com>

make docs
Signed-off-by: ds-ms <desattir@microsoft.com>

make docs
Signed-off-by: ds-ms <desattir@microsoft.com>
Signed-off-by: Deepak Sattiraju <desattir@microsoft.com>

using args instead of --name
Signed-off-by: ds-ms <desattir@microsoft.com>

Adding [repo_name] to use
Signed-off-by: ds-ms <desattir@microsoft.com>

Adding test
Signed-off-by: ds-ms <desattir@microsoft.com>

Adding positive test case
Signed-off-by: ds-ms <desattir@microsoft.com>

lint
Signed-off-by: ds-ms <desattir@microsoft.com>

Renaming
Signed-off-by: ds-ms <desattir@microsoft.com>

Updating repo_name to REPO_NAME

feat(helm): adding --name to update single repo
Signed-off-by: Deepak Sattiraju <desattir@microsoft.com>

Lint
Signed-off-by: ds-ms <desattir@microsoft.com>

make docs
Signed-off-by: ds-ms <desattir@microsoft.com>

make docs
Signed-off-by: ds-ms <desattir@microsoft.com>
Signed-off-by: Deepak Sattiraju <desattir@microsoft.com>

using args instead of --name
Signed-off-by: ds-ms <desattir@microsoft.com>

Adding [repo_name] to use
Signed-off-by: ds-ms <desattir@microsoft.com>

Adding test
Signed-off-by: ds-ms <desattir@microsoft.com>

Adding positive test case
Signed-off-by: ds-ms <desattir@microsoft.com>

lint
Signed-off-by: ds-ms <desattir@microsoft.com>

Renaming
Signed-off-by: ds-ms <desattir@microsoft.com>

Updating repo_name to REPO_NAME

cmd/helm/repo_update.go

@@ -36,15 +36,24 @@ Information is cached locally, where it is used by commands like 'helm search'.
 
 'helm update' is the deprecated form of 'helm repo update'. It will be removed in
 future releases.
+
+You can specify the name of a repository you want to update.
+
+	$ helm repo update <repo_name>
+
+To update all the repositories, use 'helm repo update'.
+
 `
 
 var errNoRepositories = errors.New("no repositories found. You must add one before updating")
+var errNoRepositoriesMatchingRepoName = errors.New("no repositories found matching the provided name. Verify if the repo exists")
 
 type repoUpdateCmd struct {
 	update func([]*repo.ChartRepository, io.Writer, helmpath.Home, bool) error
 	home   helmpath.Home
 	out    io.Writer
 	strict bool
+	name   string
 }
 
 func newRepoUpdateCmd(out io.Writer) *cobra.Command {
@@ -53,12 +62,15 @@ func newRepoUpdateCmd(out io.Writer) *cobra.Command {
 		update: updateCharts,
 	}
 	cmd := &cobra.Command{
-		Use:     "update",
+		Use:     "update [REPO_NAME]",
 		Aliases: []string{"up"},
 		Short:   "Update information of available charts locally from chart repositories",
 		Long:    updateDesc,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			u.home = settings.Home
+			if len(args) != 0 {
+				u.name = args[0]
+			}
 			return u.run()
 		},
 	}
@@ -84,8 +96,22 @@ func (u *repoUpdateCmd) run() error {
 		if err != nil {
 			return err
 		}
-		repos = append(repos, r)
+		if len(u.name) != 0 {
+			if cfg.Name == u.name {
+				repos = append(repos, r)
+				break
+			} else {
+				continue
+			}
+		} else {
+			repos = append(repos, r)
+		}
 	}
+
+	if len(repos) == 0 {
+		return errNoRepositoriesMatchingRepoName
+	}
+
 	return u.update(repos, u.out, u.home, u.strict)
 }
 

cmd/helm/repo_update_test.go

@@ -132,3 +132,78 @@ func TestUpdateCmdStrictFlag(t *testing.T) {
 		t.Errorf("Expected 'Unable to get an update', got %q", got)
 	}
 }
+
+func TestUpdateCmdWithSingleRepoNameWhichDoesntExist(t *testing.T) {
+	thome, err := tempHelmHome(t)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cleanup := resetEnv()
+	defer func() {
+		os.RemoveAll(thome.String())
+		cleanup()
+	}()
+
+	settings.Home = thome
+
+	out := bytes.NewBuffer(nil)
+	cmd := newRepoUpdateCmd(out)
+
+	if err = cmd.RunE(cmd, []string{"randomRepo"}); err == nil {
+		t.Fatal("expected error due to wrong repo name")
+	}
+
+	if got := fmt.Sprintf("%v", err); !strings.Contains(got, "no repositories found matching the provided name. Verify if the repo exists") {
+		t.Errorf("Expected 'no repositories found matching the provided name. Verify if the repo exists', got %q", got)
+	}
+}
+
+func TestUpdateRepo(t *testing.T) {
+	ts, thome, err := repotest.NewTempServer("testdata/testserver/*.*")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	hh := helmpath.Home(thome)
+	cleanup := resetEnv()
+	defer func() {
+		ts.Stop()
+		os.RemoveAll(thome.String())
+		cleanup()
+	}()
+	if err := ensureTestHome(hh, t); err != nil {
+		t.Fatal(err)
+	}
+
+	settings.Home = thome
+
+	if err := addRepository("repo1", ts.URL(), "", "", hh, "", "", "", true); err != nil {
+		t.Error(err)
+	}
+
+	if err := addRepository("repo2", ts.URL(), "", "", hh, "", "", "", true); err != nil {
+		t.Error(err)
+	}
+
+	out := bytes.NewBuffer(nil)
+	cmd := newRepoUpdateCmd(out)
+
+	if err = cmd.RunE(cmd, []string{"repo1"}); err != nil {
+		t.Fatal("expected to update repo1 correctly")
+	}
+
+	got := out.String()
+
+	if !strings.Contains(got, "Successfully got an update from the \"repo1\"") {
+		t.Errorf("Expected to successfully update \"repo1\" repository, got %q", got)
+	}
+
+	if strings.Contains(got, "Successfully got an update from the \"repo2\"") {
+		t.Errorf("Shouldn't have updated \"repo2\" repository, got %q", got)
+	}
+
+	if !strings.Contains(got, "Update Complete.") {
+		t.Error("Update was not successful")
+	}
+}

docs/helm/helm_repo_update.md

@@ -11,9 +11,16 @@ Information is cached locally, where it is used by commands like 'helm search'.
 'helm update' is the deprecated form of 'helm repo update'. It will be removed in
 future releases.
 
+You can specify the name of a repository you want to update.
+
+	$ helm repo update <repo_name>
+
+To update all the repositories, use 'helm repo update'.
+
+
 
 ```
-helm repo update [flags]
+helm repo update [REPO_NAME] [flags]
 ```
 
 ### Options
@@ -39,4 +46,4 @@ helm repo update [flags]
 
 * [helm repo](helm_repo.md)	 - Add, list, remove, update, and index chart repositories
 
-###### Auto generated by spf13/cobra on 16-May-2019
+###### Auto generated by spf13/cobra on 7-Jun-2019