Fix:(issue_2244) Dont check req flags for help and completion commands

command_run.go

@@ -141,8 +141,8 @@ func (cmd *Command) run(ctx context.Context, osArgs []string) (_ context.Context
 	var rargs Args = &stringSliceArgs{v: osArgs}
 	var args Args = &stringSliceArgs{rargs.Tail()}
 
-	if cmd.isCompletionCommand {
-		tracef("completion command detected, skipping pre-parse (cmd=%[1]q)", cmd.Name)
+	if cmd.isCompletionCommand || cmd.Name == helpName {
+		tracef("special command detected, skipping pre-parse (cmd=%[1]q)", cmd.Name)
 		cmd.parsedArgs = args
 		return ctx, cmd.Action(ctx, cmd)
 	}

completion_test.go

@@ -21,7 +21,7 @@ func TestCompletionEnable(t *testing.T) {
 	cmd := &Command{
 		EnableShellCompletion: true,
 		Flags: []Flag{
-			&BoolFlag{
+			&StringFlag{
 				Name:     "goo",
 				Required: true,
 			},

help_test.go

@@ -108,7 +108,7 @@ func TestShowSubcommandHelpAndExit(t *testing.T) {
 	require.Equal(t, 42, lastExitCode)
 }
 
-func Test_Help_RequiredFlagsNoDefault(t *testing.T) {
+func Test_HelpFlag_RequiredFlagsNoDefault(t *testing.T) {
 	output := new(bytes.Buffer)
 
 	cmd := &Command{
@@ -136,6 +136,34 @@ GLOBAL OPTIONS:
 		"expected output to include usage text")
 }
 
+func Test_HelpCommand_RequiredFlagsNoDefault(t *testing.T) {
+	output := new(bytes.Buffer)
+
+	cmd := &Command{
+		Flags: []Flag{
+			&Int64Flag{Name: "foo", Aliases: []string{"f"}, Required: true},
+		},
+		Arguments: AnyArguments,
+		Writer:    output,
+	}
+
+	_ = cmd.Run(buildTestContext(t), []string{"test", "help"})
+
+	expected := `NAME:
+   test - A new cli application
+
+USAGE:
+   test [global options] [arguments...]
+
+GLOBAL OPTIONS:
+   --foo int, -f int  
+   --help, -h         show help
+`
+
+	assert.Contains(t, output.String(), expected,
+		"expected output to include usage text")
+}
+
 func Test_Help_Custom_Flags(t *testing.T) {
 	oldFlag := HelpFlag
 	defer func() {