Merge pull request #4988 from sebastiantoh/ignore-errors

fix(parser): Allow help and version command

clap_builder/src/builder/command.rs

@@ -3810,7 +3810,7 @@ impl Command {
         // do the real parsing
         let mut parser = Parser::new(self);
         if let Err(error) = parser.get_matches_with(&mut matcher, raw_args, args_cursor) {
-            if self.is_set(AppSettings::IgnoreErrors) {
+            if self.is_set(AppSettings::IgnoreErrors) && error.use_stderr() {
                 debug!("Command::_do_parse: ignoring error: {error}");
             } else {
                 return Err(error);

tests/builder/ignore_errors.rs

@@ -1,5 +1,7 @@
 use clap::{arg, Arg, ArgAction, Command};
 
+use super::utils;
+
 #[test]
 fn single_short_arg_without_value() {
     let cmd = Command::new("cmd").ignore_errors(true).arg(arg!(
@@ -124,3 +126,24 @@ fn subcommand() {
         Some("some other val")
     );
 }
+
+#[test]
+fn help_command() {
+    static HELP: &str = "\
+Usage: test
+
+Options:
+  -h, --help  Print help
+";
+
+    let cmd = Command::new("test").ignore_errors(true);
+
+    utils::assert_output(cmd, "test --help", HELP, false);
+}
+
+#[test]
+fn version_command() {
+    let cmd = Command::new("test").ignore_errors(true).version("0.1");
+
+    utils::assert_output(cmd, "test --version", "test 0.1\n", false);
+}