Mercurial > hg-stable
changeset 45451:a6a000ab135b
rhg: print error message when argument parsing fails
Differential Revision: https://phab.mercurial-scm.org/D8956
| author | Antoine Cezar <antoine.cezar@octobus.net> |
|---|---|
| date | Mon, 17 Aug 2020 16:55:43 +0200 |
| parents | fbc373b7cbc3 |
| children | 3d9f1dfc52c2 |
| files | rust/rhg/src/main.rs rust/rhg/src/ui.rs tests/test-rhg.t |
| diffstat | 3 files changed, 13 insertions(+), 1 deletions(-) [+] |
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--- a/rust/rhg/src/main.rs Thu Aug 13 16:36:42 2020 +0200 +++ b/rust/rhg/src/main.rs Mon Aug 17 16:55:43 2020 +0200 @@ -21,7 +21,8 @@ SubCommand::with_name("files").about(commands::files::HELP_TEXT), ); - let matches = app.clone().get_matches_safe().unwrap_or_else(|_| { + let matches = app.clone().get_matches_safe().unwrap_or_else(|err| { + let _ = ui::Ui::new().writeln_stderr_str(&err.message); std::process::exit(exitcode::UNIMPLEMENTED_COMMAND) });
--- a/rust/rhg/src/ui.rs Thu Aug 13 16:36:42 2020 +0200 +++ b/rust/rhg/src/ui.rs Mon Aug 17 16:55:43 2020 +0200 @@ -47,6 +47,11 @@ stderr.flush().or_else(handle_stderr_error) } + + /// Write string line to stderr + pub fn writeln_stderr_str(&self, s: &str) -> Result<(), UiError> { + self.write_stderr(&format!("{}\n", s).as_bytes()) + } } /// A buffered stdout writer for faster batch printing operations.
--- a/tests/test-rhg.t Thu Aug 13 16:36:42 2020 +0200 +++ b/tests/test-rhg.t Mon Aug 17 16:55:43 2020 +0200 @@ -12,6 +12,12 @@ Unimplemented command $ rhg unimplemented-command + error: Found argument 'unimplemented-command' which wasn't expected, or isn't valid in this context + + USAGE: + rhg <SUBCOMMAND> + + For more information try --help [252] Finding root