Mercurial > hg
view rust/rhg/src/error.rs @ 46593:5ce2aa7c2ad5
rhg: Move `Repo` object creation into `main()`
… rather than in each sub-command that needs a local repository.
This will allow accessing e.g. `.hg/blackbox.log` before dispatching
to sub-commands.
Differential Revision: https://phab.mercurial-scm.org/D10004
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Mon, 15 Feb 2021 20:13:09 +0100 |
parents | 21d3b40b4c0e |
children | 33f2d56acc73 |
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use crate::ui::utf8_to_local; use crate::ui::UiError; use crate::NoRepoInCwdError; use format_bytes::format_bytes; use hg::config::{ConfigError, ConfigParseError}; use hg::errors::HgError; use hg::repo::RepoError; use hg::revlog::revlog::RevlogError; use hg::utils::files::get_bytes_from_path; use std::convert::From; /// The kind of command error #[derive(Debug)] pub enum CommandError { /// Exit with an error message and "standard" failure exit code. Abort { message: Vec<u8> }, /// A mercurial capability as not been implemented. /// /// 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. Unimplemented, } impl CommandError { 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(), } } } /// For now we don’t differenciate between invalid CLI args and valid for `hg` /// but not supported yet by `rhg`. impl From<clap::Error> for CommandError { fn from(_: clap::Error) -> Self { CommandError::Unimplemented } } impl From<HgError> for CommandError { fn from(error: HgError) -> Self { match error { HgError::UnsupportedFeature(_) => CommandError::Unimplemented, _ => CommandError::abort(error.to_string()), } } } impl From<UiError> for CommandError { 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("") } } impl From<RepoError> for CommandError { fn from(error: RepoError) -> Self { match error { RepoError::NotFound { at } => CommandError::Abort { message: format_bytes!( b"repository {} not found", get_bytes_from_path(at) ), }, RepoError::ConfigParseError(error) => error.into(), RepoError::Other(error) => error.into(), } } } impl<'a> From<&'a NoRepoInCwdError> for CommandError { fn from(error: &'a NoRepoInCwdError) -> Self { let NoRepoInCwdError { cwd } = error; CommandError::Abort { message: format_bytes!( b"no repository found in '{}' (.hg not found)!", get_bytes_from_path(cwd) ), } } } impl From<ConfigError> for CommandError { fn from(error: ConfigError) -> Self { match error { ConfigError::Parse(error) => error.into(), ConfigError::Other(error) => error.into(), } } } impl From<ConfigParseError> for CommandError { fn from(error: ConfigParseError) -> Self { let ConfigParseError { origin, line, bytes, } = error; let line_message = if let Some(line_number) = line { format_bytes!(b" at line {}", line_number.to_string().into_bytes()) } else { Vec::new() }; CommandError::Abort { message: format_bytes!( b"config parse error in {}{}: '{}'", origin, line_message, bytes ), } } } impl From<(RevlogError, &str)> for CommandError { fn from((err, rev): (RevlogError, &str)) -> CommandError { match err { RevlogError::InvalidRevision => CommandError::abort(format!( "invalid revision identifier {}", rev )), RevlogError::AmbiguousPrefix => CommandError::abort(format!( "ambiguous revision identifier {}", rev )), RevlogError::Other(error) => error.into(), } } }