|
|
extern crate log;
|
|
|
use crate::ui::Ui;
|
|
|
use clap::App;
|
|
|
use clap::AppSettings;
|
|
|
use clap::Arg;
|
|
|
use clap::ArgMatches;
|
|
|
use format_bytes::format_bytes;
|
|
|
use hg::config::Config;
|
|
|
use hg::repo::{Repo, RepoError};
|
|
|
use hg::utils::files::{get_bytes_from_os_str, get_path_from_bytes};
|
|
|
use hg::utils::SliceExt;
|
|
|
use std::ffi::OsString;
|
|
|
use std::path::PathBuf;
|
|
|
|
|
|
mod blackbox;
|
|
|
mod error;
|
|
|
mod exitcode;
|
|
|
mod ui;
|
|
|
use error::CommandError;
|
|
|
|
|
|
fn main_with_result(
|
|
|
process_start_time: &blackbox::ProcessStartTime,
|
|
|
ui: &ui::Ui,
|
|
|
repo: Result<&Repo, &NoRepoInCwdError>,
|
|
|
config: &Config,
|
|
|
) -> Result<(), CommandError> {
|
|
|
let app = App::new("rhg")
|
|
|
.global_setting(AppSettings::AllowInvalidUtf8)
|
|
|
.setting(AppSettings::SubcommandRequired)
|
|
|
.setting(AppSettings::VersionlessSubcommands)
|
|
|
.arg(
|
|
|
Arg::with_name("repository")
|
|
|
.help("repository root directory")
|
|
|
.short("-R")
|
|
|
.long("--repository")
|
|
|
.value_name("REPO")
|
|
|
.takes_value(true)
|
|
|
// Both ok: `hg -R ./foo log` or `hg log -R ./foo`
|
|
|
.global(true),
|
|
|
)
|
|
|
.arg(
|
|
|
Arg::with_name("config")
|
|
|
.help("set/override config option (use 'section.name=value')")
|
|
|
.long("--config")
|
|
|
.value_name("CONFIG")
|
|
|
.takes_value(true)
|
|
|
.global(true)
|
|
|
// Ok: `--config section.key1=val --config section.key2=val2`
|
|
|
.multiple(true)
|
|
|
// Not ok: `--config section.key1=val section.key2=val2`
|
|
|
.number_of_values(1),
|
|
|
)
|
|
|
.version("0.0.1");
|
|
|
let app = add_subcommand_args(app);
|
|
|
|
|
|
let matches = app.clone().get_matches_safe()?;
|
|
|
|
|
|
let (subcommand_name, subcommand_matches) = matches.subcommand();
|
|
|
let run = subcommand_run_fn(subcommand_name)
|
|
|
.expect("unknown subcommand name from clap despite AppSettings::SubcommandRequired");
|
|
|
let subcommand_args = subcommand_matches
|
|
|
.expect("no subcommand arguments from clap despite AppSettings::SubcommandRequired");
|
|
|
|
|
|
let invocation = CliInvocation {
|
|
|
ui,
|
|
|
subcommand_args,
|
|
|
config,
|
|
|
repo,
|
|
|
};
|
|
|
let blackbox = blackbox::Blackbox::new(&invocation, process_start_time)?;
|
|
|
blackbox.log_command_start();
|
|
|
let result = run(&invocation);
|
|
|
blackbox.log_command_end(exit_code(&result));
|
|
|
result
|
|
|
}
|
|
|
|
|
|
fn main() {
|
|
|
// Run this first, before we find out if the blackbox extension is even
|
|
|
// enabled, in order to include everything in-between in the duration
|
|
|
// measurements. Reading config files can be slow if they’re on NFS.
|
|
|
let process_start_time = blackbox::ProcessStartTime::now();
|
|
|
|
|
|
env_logger::init();
|
|
|
let ui = ui::Ui::new();
|
|
|
|
|
|
let early_args = EarlyArgs::parse(std::env::args_os());
|
|
|
let non_repo_config =
|
|
|
Config::load(early_args.config).unwrap_or_else(|error| {
|
|
|
// Normally this is decided based on config, but we don’t have that
|
|
|
// available. As of this writing config loading never returns an
|
|
|
// "unsupported" error but that is not enforced by the type system.
|
|
|
let on_unsupported = OnUnsupported::Abort;
|
|
|
|
|
|
exit(&ui, on_unsupported, Err(error.into()))
|
|
|
});
|
|
|
|
|
|
let repo_path = early_args.repo.as_deref().map(get_path_from_bytes);
|
|
|
let repo_result = match Repo::find(&non_repo_config, repo_path) {
|
|
|
Ok(repo) => Ok(repo),
|
|
|
Err(RepoError::NotFound { at }) if repo_path.is_none() => {
|
|
|
// Not finding a repo is not fatal yet, if `-R` was not given
|
|
|
Err(NoRepoInCwdError { cwd: at })
|
|
|
}
|
|
|
Err(error) => exit(
|
|
|
&ui,
|
|
|
OnUnsupported::from_config(&non_repo_config),
|
|
|
Err(error.into()),
|
|
|
),
|
|
|
};
|
|
|
|
|
|
let config = if let Ok(repo) = &repo_result {
|
|
|
repo.config()
|
|
|
} else {
|
|
|
&non_repo_config
|
|
|
};
|
|
|
|
|
|
let result = main_with_result(
|
|
|
&process_start_time,
|
|
|
&ui,
|
|
|
repo_result.as_ref(),
|
|
|
config,
|
|
|
);
|
|
|
exit(&ui, OnUnsupported::from_config(config), result)
|
|
|
}
|
|
|
|
|
|
fn exit_code(result: &Result<(), CommandError>) -> i32 {
|
|
|
match result {
|
|
|
Ok(()) => exitcode::OK,
|
|
|
Err(CommandError::Abort { .. }) => exitcode::ABORT,
|
|
|
|
|
|
// Exit with a specific code and no error message to let a potential
|
|
|
// wrapper script fallback to Python-based Mercurial.
|
|
|
Err(CommandError::UnsupportedFeature { .. }) => {
|
|
|
exitcode::UNIMPLEMENTED
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
fn exit(
|
|
|
ui: &Ui,
|
|
|
on_unsupported: OnUnsupported,
|
|
|
result: Result<(), CommandError>,
|
|
|
) -> ! {
|
|
|
match &result {
|
|
|
Ok(_) => {}
|
|
|
Err(CommandError::Abort { message }) => {
|
|
|
if !message.is_empty() {
|
|
|
// Ignore errors when writing to stderr, we’re already exiting
|
|
|
// with failure code so there’s not much more we can do.
|
|
|
let _ =
|
|
|
ui.write_stderr(&format_bytes!(b"abort: {}\n", message));
|
|
|
}
|
|
|
}
|
|
|
Err(CommandError::UnsupportedFeature { message }) => {
|
|
|
match on_unsupported {
|
|
|
OnUnsupported::Abort => {
|
|
|
let _ = ui.write_stderr(&format_bytes!(
|
|
|
b"unsupported feature: {}\n",
|
|
|
message
|
|
|
));
|
|
|
}
|
|
|
OnUnsupported::AbortSilent => {}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
std::process::exit(exit_code(&result))
|
|
|
}
|
|
|
|
|
|
macro_rules! subcommands {
|
|
|
($( $command: ident )+) => {
|
|
|
mod commands {
|
|
|
$(
|
|
|
pub mod $command;
|
|
|
)+
|
|
|
}
|
|
|
|
|
|
fn add_subcommand_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
|
|
|
app
|
|
|
$(
|
|
|
.subcommand(commands::$command::args())
|
|
|
)+
|
|
|
}
|
|
|
|
|
|
pub type RunFn = fn(&CliInvocation) -> Result<(), CommandError>;
|
|
|
|
|
|
fn subcommand_run_fn(name: &str) -> Option<RunFn> {
|
|
|
match name {
|
|
|
$(
|
|
|
stringify!($command) => Some(commands::$command::run),
|
|
|
)+
|
|
|
_ => None,
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
subcommands! {
|
|
|
cat
|
|
|
debugdata
|
|
|
debugrequirements
|
|
|
files
|
|
|
root
|
|
|
config
|
|
|
}
|
|
|
pub struct CliInvocation<'a> {
|
|
|
ui: &'a Ui,
|
|
|
subcommand_args: &'a ArgMatches<'a>,
|
|
|
config: &'a Config,
|
|
|
/// References inside `Result` is a bit peculiar but allow
|
|
|
/// `invocation.repo?` to work out with `&CliInvocation` since this
|
|
|
/// `Result` type is `Copy`.
|
|
|
repo: Result<&'a Repo, &'a NoRepoInCwdError>,
|
|
|
}
|
|
|
|
|
|
struct NoRepoInCwdError {
|
|
|
cwd: PathBuf,
|
|
|
}
|
|
|
|
|
|
/// CLI arguments to be parsed "early" in order to be able to read
|
|
|
/// configuration before using Clap. Ideally we would also use Clap for this,
|
|
|
/// see <https://github.com/clap-rs/clap/discussions/2366>.
|
|
|
///
|
|
|
/// These arguments are still declared when we do use Clap later, so that Clap
|
|
|
/// does not return an error for their presence.
|
|
|
struct EarlyArgs {
|
|
|
/// Values of all `--config` arguments. (Possibly none)
|
|
|
config: Vec<Vec<u8>>,
|
|
|
/// Value of the `-R` or `--repository` argument, if any.
|
|
|
repo: Option<Vec<u8>>,
|
|
|
}
|
|
|
|
|
|
impl EarlyArgs {
|
|
|
fn parse(args: impl IntoIterator<Item = OsString>) -> Self {
|
|
|
let mut args = args.into_iter().map(get_bytes_from_os_str);
|
|
|
let mut config = Vec::new();
|
|
|
let mut repo = None;
|
|
|
// Use `while let` instead of `for` so that we can also call
|
|
|
// `args.next()` inside the loop.
|
|
|
while let Some(arg) = args.next() {
|
|
|
if arg == b"--config" {
|
|
|
if let Some(value) = args.next() {
|
|
|
config.push(value)
|
|
|
}
|
|
|
} else if let Some(value) = arg.drop_prefix(b"--config=") {
|
|
|
config.push(value.to_owned())
|
|
|
}
|
|
|
|
|
|
if arg == b"--repository" || arg == b"-R" {
|
|
|
if let Some(value) = args.next() {
|
|
|
repo = Some(value)
|
|
|
}
|
|
|
} else if let Some(value) = arg.drop_prefix(b"--repository=") {
|
|
|
repo = Some(value.to_owned())
|
|
|
} else if let Some(value) = arg.drop_prefix(b"-R") {
|
|
|
repo = Some(value.to_owned())
|
|
|
}
|
|
|
}
|
|
|
Self { config, repo }
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// What to do when encountering some unsupported feature.
|
|
|
///
|
|
|
/// See `HgError::UnsupportedFeature` and `CommandError::UnsupportedFeature`.
|
|
|
enum OnUnsupported {
|
|
|
/// Print an error message describing what feature is not supported,
|
|
|
/// and exit with code 252.
|
|
|
Abort,
|
|
|
/// Silently exit with code 252.
|
|
|
AbortSilent,
|
|
|
}
|
|
|
|
|
|
impl OnUnsupported {
|
|
|
fn from_config(config: &Config) -> Self {
|
|
|
let default = OnUnsupported::Abort;
|
|
|
match config.get(b"rhg", b"on-unsupported") {
|
|
|
Some(b"abort") => OnUnsupported::Abort,
|
|
|
Some(b"abort-silent") => OnUnsupported::AbortSilent,
|
|
|
None => default,
|
|
|
Some(_) => {
|
|
|
// TODO: warn about unknown config value
|
|
|
default
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|