fix(help): Do not propagate global args to help

clap_complete/tests/snapshots/basic.bash

@@ -39,7 +39,7 @@ _my-app() {
             return 0
             ;;
         my__app__help)
-            opts="-c test help"
+            opts="test help"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -53,7 +53,7 @@ _my-app() {
             return 0
             ;;
         my__app__help__help)
-            opts="-c"
+            opts=""
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -67,7 +67,7 @@ _my-app() {
             return 0
             ;;
         my__app__help__test)
-            opts="-c"
+            opts=""
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0

clap_complete/tests/snapshots/basic.elvish

@@ -32,15 +32,12 @@ set edit:completion:arg-completer[my-app] = {|@words|
             cand --help 'Print help information'
         }
         &'my-app;help'= {
-            cand -c 'c'
             cand test 'Subcommand'
             cand help 'Print this message or the help of the given subcommand(s)'
         }
         &'my-app;help;test'= {
-            cand -c 'c'
         }
         &'my-app;help;help'= {
-            cand -c 'c'
         }
     ]
     $completions[$command]

clap_complete/tests/snapshots/basic.fish

@@ -6,8 +6,5 @@ complete -c my-app -n "__fish_use_subcommand" -f -a "help" -d 'Print this messag
 complete -c my-app -n "__fish_seen_subcommand_from test" -s d
 complete -c my-app -n "__fish_seen_subcommand_from test" -s c
 complete -c my-app -n "__fish_seen_subcommand_from test" -s h -l help -d 'Print help information'
-complete -c my-app -n "__fish_seen_subcommand_from help; and not __fish_seen_subcommand_from test; and not __fish_seen_subcommand_from help" -s c
 complete -c my-app -n "__fish_seen_subcommand_from help; and not __fish_seen_subcommand_from test; and not __fish_seen_subcommand_from help" -f -a "test" -d 'Subcommand'
 complete -c my-app -n "__fish_seen_subcommand_from help; and not __fish_seen_subcommand_from test; and not __fish_seen_subcommand_from help" -f -a "help" -d 'Print this message or the help of the given subcommand(s)'
-complete -c my-app -n "__fish_seen_subcommand_from help; and __fish_seen_subcommand_from test" -s c
-complete -c my-app -n "__fish_seen_subcommand_from help; and __fish_seen_subcommand_from help" -s c

clap_complete/tests/snapshots/basic.ps1

@@ -37,17 +37,14 @@ Register-ArgumentCompleter -Native -CommandName 'my-app' -ScriptBlock {
             break
         }
         'my-app;help' {
-            [CompletionResult]::new('-c', 'c', [CompletionResultType]::ParameterName, 'c')
             [CompletionResult]::new('test', 'test', [CompletionResultType]::ParameterValue, 'Subcommand')
             [CompletionResult]::new('help', 'help', [CompletionResultType]::ParameterValue, 'Print this message or the help of the given subcommand(s)')
             break
         }
         'my-app;help;test' {
-            [CompletionResult]::new('-c', 'c', [CompletionResultType]::ParameterName, 'c')
             break
         }
         'my-app;help;help' {
-            [CompletionResult]::new('-c', 'c', [CompletionResultType]::ParameterName, 'c')
             break
         }
     })

clap_complete/tests/snapshots/basic.zsh

@@ -38,7 +38,6 @@ _arguments "${_arguments_options[@]}" /
 ;;
 (help)
 _arguments "${_arguments_options[@]}" /
-'*-c[]' /
 ":: :_my-app__help_commands" /
 "*::: :->help" /
 && ret=0
@@ -51,12 +50,10 @@ _arguments "${_arguments_options[@]}" /
         case $line[1] in
             (test)
 _arguments "${_arguments_options[@]}" /
-'*-c[]' /
 && ret=0
 ;;
 (help)
 _arguments "${_arguments_options[@]}" /
-'*-c[]' /
 && ret=0
 ;;
         esac

clap_complete_fig/tests/snapshots/basic.fig.js

@@ -26,25 +26,10 @@ const completion: Fig.Spec = {
         {
           name: "test",
           description: "Subcommand",
-          options: [
-            {
-              name: "-c",
-            },
-          ],
         },
         {
           name: "help",
           description: "Print this message or the help of the given subcommand(s)",
-          options: [
-            {
-              name: "-c",
-            },
-          ],
-        },
-      ],
-      options: [
-        {
-          name: "-c",
         },
       ],
     },

src/builder/command.rs

@@ -4070,7 +4070,17 @@ impl Command {
     pub(crate) fn _propagate_global_args(&mut self) {
         debug!("Command::_propagate_global_args:{}", self.name);
 
+        let autogenerated_help_subcommand = !self.is_disable_help_subcommand_set();
+
         for sc in &mut self.subcommands {
+            if sc.get_name() == "help" && autogenerated_help_subcommand {
+                // Avoid propagating args to the autogenerated help subtrees used in completion.
+                // This prevents args from showing up during help completions like
+                // `myapp help subcmd <TAB>`, which should only suggest subcommands and not args,
+                // while still allowing args to show up properly on the generated help message.
+                continue;
+            }
+
             for a in self.args.args().filter(|a| a.is_global_set()) {
                 if sc.find(&a.id).is_some() {
                     debug!(

tests/builder/help.rs

@@ -2097,6 +2097,111 @@ Arguments:
     );
 }
 
+#[test]
+fn global_args_should_show_on_toplevel_help_message() {
+    static HELP: &str = "myapp\x20
+
+Usage:
+    myapp [OPTIONS] [SUBCOMMAND]
+
+Subcommands:
+    subcmd\x20\x20\x20\x20
+    help      Print this message or the help of the given subcommand(s)
+
+Options:
+    -g, --some-global <someglobal>\x20\x20\x20\x20
+    -h, --help                        Print help information
+";
+
+    let cmd = Command::new("myapp")
+        .arg(
+            Arg::new("someglobal")
+                .short('g')
+                .long("some-global")
+                .global(true),
+        )
+        .subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
+
+    utils::assert_output(cmd, "myapp help", HELP, false);
+}
+
+#[test]
+fn global_args_should_not_show_on_help_message_for_help_help() {
+    static HELP_HELP: &str = "myapp-help\x20
+Print this message or the help of the given subcommand(s)
+
+Usage:
+    myapp help [SUBCOMMAND]...
+
+Arguments:
+    [SUBCOMMAND]...    The subcommand whose help message to display
+";
+
+    let cmd = Command::new("myapp")
+        .arg(
+            Arg::new("someglobal")
+                .short('g')
+                .long("some-global")
+                .global(true),
+        )
+        .subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
+
+    utils::assert_output(cmd, "myapp help help", HELP_HELP, false);
+}
+
+#[test]
+fn global_args_should_show_on_help_message_for_subcommand() {
+    static HELP_SUBCMD: &str = "myapp-subcmd\x20
+
+Usage:
+    myapp subcmd [OPTIONS] [SUBCOMMAND]
+
+Subcommands:
+    multi\x20\x20\x20\x20
+    help     Print this message or the help of the given subcommand(s)
+
+Options:
+    -g, --some-global <someglobal>\x20\x20\x20\x20
+    -h, --help                        Print help information
+";
+
+    let cmd = Command::new("myapp")
+        .arg(
+            Arg::new("someglobal")
+                .short('g')
+                .long("some-global")
+                .global(true),
+        )
+        .subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
+
+    utils::assert_output(cmd, "myapp help subcmd", HELP_SUBCMD, false);
+}
+
+#[test]
+fn global_args_should_show_on_help_message_for_nested_subcommand() {
+    static HELP_SUB_SUBCMD: &str = "myapp-subcmd-multi 1.0
+
+Usage:
+    myapp subcmd multi [OPTIONS]
+
+Options:
+    -g, --some-global <someglobal>\x20\x20\x20\x20
+    -h, --help                        Print help information
+    -V, --version                     Print version information
+";
+
+    let cmd = Command::new("myapp")
+        .arg(
+            Arg::new("someglobal")
+                .short('g')
+                .long("some-global")
+                .global(true),
+        )
+        .subcommand(Command::new("subcmd").subcommand(Command::new("multi").version("1.0")));
+
+    utils::assert_output(cmd, "myapp help subcmd multi", HELP_SUB_SUBCMD, false);
+}
+
 #[test]
 fn option_usage_order() {
     static OPTION_USAGE_ORDER: &str = "order