use anyhow::{Context, Error, Result};
use helix_loader::VERSION_AND_GIT_HASH;
use helix_term::application::Application;
use helix_term::args::Args;
use helix_term::config::{Config, ConfigLoadError};
fn setup_logging(verbosity: u64) -> Result<()> {
let mut base_config = fern::Dispatch::new();
base_config = match verbosity {
0 => base_config.level(log::LevelFilter::Warn),
1 => base_config.level(log::LevelFilter::Info),
2 => base_config.level(log::LevelFilter::Debug),
_3_or_more => base_config.level(log::LevelFilter::Trace),
};
// Separate file config so we can include year, month and day in file logs
let file_config = fern::Dispatch::new()
.format(|out, message, record| {
out.finish(format_args!(
"{} {} [{}] {}",
chrono::Local::now().format("%Y-%m-%dT%H:%M:%S%.3f"),
record.target(),
record.level(),
message
))
})
.chain(fern::log_file(helix_loader::log_file())?);
base_config.chain(file_config).apply()?;
Ok(())
}
fn main() -> Result<()> {
let exit_code = main_impl()?;
std::process::exit(exit_code);
}
#[tokio::main]
async fn main_impl() -> Result<i32> {
let args = Args::parse_args().context("could not parse arguments")?;
helix_loader::initialize_config_file(args.config_file.clone());
helix_loader::initialize_log_file(args.log_file.clone());
// Help has a higher priority and should be handled separately.
if args.display_help {
print!(
"\
{} {}
{}
{}
USAGE:
hx [FLAGS] [files]...
ARGS:
<files>... Set the input file to use, position can also be specified via file[:row[:col]]
FLAGS:
-h, --help Print help information
--tutor Load the tutorial
--health [CATEGORY] Check for potential errors in editor setup
CATEGORY can be a language or one of 'clipboard', 'languages',
'all-languages' or 'all'. 'languages' is filtered according to
user config, 'all-languages' and 'all' are not. If not specified,
the default is the same as 'all', but with languages filtering.
-g, --grammar {{fetch|build}} Fetch or builds tree-sitter grammars listed in languages.toml
-c, --config <file> Specify a file to use for configuration
-v Increase logging verbosity each use for up to 3 times
--log <file> Specify a file to use for logging
(default file: {})
-V, --version Print version information
--vsplit Split all given files vertically into different windows
--hsplit Split all given files horizontally into different windows
-w, --working-dir <path> Specify an initial working directory
+[N] Open the first given file at line number N, or the last line, if
N is not specified.
",
env!("CARGO_PKG_NAME"),
VERSION_AND_GIT_HASH,
env!("CARGO_PKG_AUTHORS"),
env!("CARGO_PKG_DESCRIPTION"),
helix_loader::default_log_file().display(),
);
std::process::exit(0);
}
if args.display_version {
println!("helix {}", VERSION_AND_GIT_HASH);
std::process::exit(0);
}
if args.health {
if let Err(err) = helix_term::health::print_health(args.health_arg) {
// Piping to for example `head -10` requires special handling:
// https://stackoverflow.com/a/65760807/7115678
if err.kind() != std::io::ErrorKind::BrokenPipe {
return Err(err.into());
}
}
std::process::exit(0);
}
if args.fetch_grammars {
helix_loader::grammar::fetch_grammars()?;
return Ok(0);
}
if args.build_grammars {
helix_loader::grammar::build_grammars(None)?;
return Ok(0);
}
setup_logging(args.verbosity).context("failed to initialize logging")?;
// NOTE: Set the working directory early so the correct configuration is loaded. Be aware that
// Application::new() depends on this logic so it must be updated if this changes.
if let Some(path) = &args.working_directory {
helix_stdx::env::set_current_working_dir(path)?;
} else if let Some((path, _)) = args.files.first().filter(|p| p.0.is_dir()) {
// If the first file is a directory, it will be the working directory unless -w was specified
helix_stdx::env::set_current_working_dir(path)?;
}
let config = match Config::load_default() {
Ok(config) => config,
Err(ConfigLoadError::Error(err)) if err.kind() == std::io::ErrorKind::NotFound => {
Config::default()
}
Err(ConfigLoadError::Error(err)) => return Err(Error::new(err)),
Err(ConfigLoadError::BadConfig(err)) => {
eprintln!("Bad config: {}", err);
eprintln!("Press <ENTER> to continue with default config");
use std::io::Read;
let _ = std::io::stdin().read(&mut []);
Config::default()
}
};
let lang_loader = helix_core::config::user_lang_loader().unwrap_or_else(|err| {
eprintln!("{}", err);
eprintln!("Press <ENTER> to continue with default language config");
use std::io::Read;
// This waits for an enter press.
let _ = std::io::stdin().read(&mut []);
helix_core::config::default_lang_loader()
});
// TODO: use the thread local executor to spawn the application task separately from the work pool
let mut app = Application::new(args, config, lang_loader).context("unable to start Helix")?;
let mut events = app.event_stream();
let exit_code = app.run(&mut events).await?;
Ok(exit_code)
}