Merge latest and fix tests

app.go

@@ -273,12 +273,12 @@ func (a *App) RunContext(ctx context.Context, arguments []string) (err error) {
 	cCtx.shellComplete = shellComplete
 
 	a.rootCommand = &Command{
-		HelpName:       a.HelpName,
-		Subcommands:    a.Commands,
-		flagCategories: a.flagCategories,
-		Flags:          a.Flags,
-		Name:           a.Name,
-		//Action:                 a.Action,   // dont set this now
+		HelpName:               a.HelpName,
+		Subcommands:            a.Commands,
+		flagCategories:         a.flagCategories,
+		Flags:                  a.Flags,
+		Name:                   a.Name,
+		Action:                 a.Action,
 		UseShortOptionHandling: a.UseShortOptionHandling,
 		Before:                 a.Before,
 		After:                  a.After,

command.go

@@ -109,19 +109,14 @@ func (cmd *Command) Command(name string) *Command {
 }
 
 func (c *Command) setup(ctx *Context) {
-	helpCmd := helpCommand
-	if len(c.Subcommands) > 0 {
-		helpCmd = helpSubcommand
-	}
-
-	if c.Command(helpCmd.Name) == nil && !c.HideHelp {
+	if c.Command(helpCommand.Name) == nil && !c.HideHelp {
 		if !c.HideHelpCommand {
-			c.Subcommands = append(c.Subcommands, helpCmd)
+			c.Subcommands = append(c.Subcommands, helpCommand)
 		}
 	}
 
 	if c.helpAction == nil {
-		c.helpAction = helpCmd.Action
+		c.helpAction = helpCommand.Action
 	}
 
 	if !c.HideHelp && HelpFlag != nil {
@@ -183,7 +178,7 @@ func (c *Command) Run(cCtx *Context, arguments []string) (err error) {
 			if c.isRoot {
 				_ = ShowAppHelp(cCtx)
 			} else {
-				_ = ShowCommandHelp(cCtx, c.Name)
+				_ = ShowCommandHelp(cCtx.parentContext, c.Name)
 			}
 		}
 		return err

command_test.go

@@ -40,6 +40,7 @@ func TestCommandFlagParsing(t *testing.T) {
 			Description:     "testing",
 			Action:          func(_ *Context) error { return nil },
 			SkipFlagParsing: c.skipFlagParsing,
+			isRoot:          true,
 		}
 
 		err := command.Run(cCtx, c.testArgs)

help.go

@@ -68,6 +68,15 @@ var helpCommand = &Command{
 		}
 
 		// Case 3, 5
+		if (len(cCtx.Command.Subcommands) == 1 && !cCtx.Command.HideHelp) ||
+			(len(cCtx.Command.Subcommands) == 0 && cCtx.Command.HideHelp) {
+			templ := cCtx.Command.CustomHelpTemplate
+			if templ == "" {
+				templ = CommandHelpTemplate
+			}
+			HelpPrinter(cCtx.App.Writer, templ, cCtx.Command)
+			return nil
+		}
 		return ShowSubcommandHelp(cCtx)
 	},
 }
@@ -230,8 +239,9 @@ func ShowCommandHelpAndExit(c *Context, command string, code int) {
 
 // ShowCommandHelp prints help for the given command
 func ShowCommandHelp(ctx *Context, command string) error {
+
 	commands := ctx.App.Commands
-	if ctx.Command != nil {
+	if ctx.Command.Subcommands != nil {
 		commands = ctx.Command.Subcommands
 	}
 	for _, c := range commands {