use hg::errors::{HgError, IoErrorContext};

#[derive(Debug)]

    /// Exit with an error message and "standard" failure exit code.

    Abort { message: Vec<u8> },

    ///

    /// There is no error message printed in this case.

    /// Instead, we exit with a specic status code and a wrapper script may

    /// fallback to Python-based Mercurial.

    pub fn abort(message: impl AsRef<str>) -> Self {

        CommandError::Abort {

            // TODO: bytes-based (instead of Unicode-based) formatting

            // of error messages to handle non-UTF-8 filenames etc:

            // https://www.mercurial-scm.org/wiki/EncodingStrategy#Mixing_output

            message: utf8_to_local(message.as_ref()).into(),

}

impl From<HgError> for CommandError {

    fn from(error: HgError) -> Self {

        match error {

            HgError::UnsupportedFeature(_) => CommandError::Unimplemented,

            _ => CommandError::abort(error.to_string()),

    fn from(_error: UiError) -> Self {

        // If we already failed writing to stdout or stderr,

        // writing an error message to stderr about it would be likely to fail

        // too.

        CommandError::abort("")

            FindRootError::RootNotFound(path) => CommandError::abort(format!(

                "no repository found in '{}' (.hg not found)!",

                path.display()

            )),

            FindRootError::GetCurrentDirError(error) => HgError::IoError {

                error,

                context: IoErrorContext::CurrentDir,

            .into(),

            RevlogError::InvalidRevision => CommandError::abort(format!(

                "invalid revision identifier {}",

                rev

            RevlogError::AmbiguousPrefix => CommandError::abort(format!(

                "ambiguous revision identifier {}",

                rev

            RevlogError::Other(error) => error.into(),