OCM-1888: Add docs for ocm delete account subcommands and arguments

Prevously when using the help in OCM-CLI it did not list all available sub commands.
This was due to how we currently alias urls in the CLI. Now added documentation about using the
urls(path) or provide a resource_id for the resource to be deleted. Another effort has been started
to understand and standardize the help format, which in turn will help in the task OCM-5179.
The template format has been used from https://pkg.go.dev/text/template.

Signed-off-by: Chetan Giradkar <[email protected]>

Author: cgiradkar

cmd/ocm/delete/cmd.go

@@ -40,14 +40,49 @@ var args struct {
 }
 
 var Cmd = &cobra.Command{
-	Use:       "delete [flags] PATH",
+	Use:       "delete [flags] (PATH | RESOURCE_ALIAS RESOURCE_ID)",
 	Short:     "Send a DELETE request",
 	Long:      "Send a DELETE request to the given path.",
 	RunE:      run,
 	ValidArgs: urls.Resources(),
 }
 
+// for template format refer: https://pkg.go.dev/text/template
+var usageTemplate = `
+Usage:{{if .Runnable}}
+  {{.UseLine}}{{end}}{{if .HasAvailableSubCommands}}
+  {{.CommandPath}} [command]{{end}}{{if .HasExample}}
+
+Resource Alias:
+{{.Example}}{{end}}{{if .HasAvailableSubCommands}}{{$cmds := .Commands}}{{if eq (len .Groups) 0}}
+
+Available Commands:{{range $cmds}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
+  {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{else}}{{range $group := .Groups}}
+{{.Title}}{{range $cmds}}{{if (and (eq .GroupID $group.ID) (or .IsAvailableCommand (eq .Name "help")))}}
+{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if not .AllChildCommandsHaveGroup}}
+
+Additional Commands:{{range $cmds}}{{if (and (eq .GroupID "") (or .IsAvailableCommand (eq .Name "help")))}}
+{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
+
+Flags:
+{{.LocalFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasAvailableInheritedFlags}}
+
+Global Flags:
+{{.InheritedFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasHelpSubCommands}}
+
+Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
+{{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
+
+Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
+`
+
+var helpTemplate = `{{with (or .Long .Short)}}{{. | trimTrailingWhitespaces}}
+{{end}}{{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}`
+
 func init() {
+	Cmd.SetUsageTemplate(usageTemplate)
+	Cmd.SetHelpTemplate(helpTemplate)
+	Cmd.Example = "  account\n  addon\n  cluster\n  role_binding\n  sku_rule\n  subscription"
 	fs := Cmd.Flags()
 	arguments.AddParameterFlag(fs, &args.parameter)
 	arguments.AddHeaderFlag(fs, &args.header)
@@ -61,13 +96,13 @@ func init() {
 func run(cmd *cobra.Command, argv []string) error {
 	path, err := urls.Expand(argv)
 	if err != nil {
-		return fmt.Errorf("Could not create URI: %v", err)
+		return fmt.Errorf("could not create URI: %w", err)
 	}
 
 	// Create the client for the OCM API:
 	connection, err := ocm.NewConnection().Build()
 	if err != nil {
-		return fmt.Errorf("Failed to create OCM connection: %v", err)
+		return fmt.Errorf("failed to create OCM connection: %w", err)
 	}
 	defer connection.Close()
 
@@ -84,7 +119,7 @@ func run(cmd *cobra.Command, argv []string) error {
 	// Send the request:
 	response, err := request.Send()
 	if err != nil {
-		return fmt.Errorf("Can't send request: %v", err)
+		return fmt.Errorf("can't send request: %w", err)
 	}
 	status := response.Status()
 	body := response.Bytes()
@@ -94,26 +129,26 @@ func run(cmd *cobra.Command, argv []string) error {
 		err = dump.Pretty(os.Stderr, body)
 	}
 	if err != nil {
-		return fmt.Errorf("Can't print body: %v", err)
+		return fmt.Errorf("can't print body: %w", err)
 	}
 
 	// Load the configuration file:
 	cfg, err := config.Load()
 	if err != nil {
-		return fmt.Errorf("Can't load config file: %v", err)
+		return fmt.Errorf("can't load config file: %w", err)
 	}
 	if cfg == nil {
-		return fmt.Errorf("Not logged in, run the 'login' command")
+		return fmt.Errorf("not logged in, run the 'login' command")
 	}
 
 	// Save the configuration:
 	cfg.AccessToken, cfg.RefreshToken, err = connection.Tokens()
 	if err != nil {
-		return fmt.Errorf("Can't get tokens: %v", err)
+		return fmt.Errorf("can't get tokens: %w", err)
 	}
 	err = config.Save(cfg)
 	if err != nil {
-		return fmt.Errorf("Can't save config file: %v", err)
+		return fmt.Errorf("can't save config file: %w", err)
 	}
 
 	// Bye: