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|
use std::io::{Read, Write};
use std::sync::Arc;
use std::sync::atomic::{AtomicU16, Ordering};
use std::sync::mpsc;
use crossterm::terminal;
use portable_pty::{CommandBuilder, PtySize, native_pty_system};
use crate::capture::CommandCaptureTracker;
use crate::debug::{Osc133DebugHighlighter, RESET};
use crate::pty_proxy::RuntimeOptions;
use crate::screen::{self, Msg};
pub(crate) fn main(options: RuntimeOptions) {
if let Err(e) = run(options) {
let _ = terminal::disable_raw_mode();
eprintln!("atuin pty-proxy: {e:#}");
std::process::exit(1);
}
}
fn run(options: RuntimeOptions) -> eyre::Result<()> {
let (cols, rows) = terminal::size()?;
let pty_system = native_pty_system();
let pair = pty_system
.openpty(PtySize {
rows,
cols,
pixel_width: 0,
pixel_height: 0,
})
.map_err(|e| eyre::eyre!("{e:#}"))?;
let sock_path = screen::socket_path();
let _ = std::fs::remove_file(&sock_path);
let mut cmd = CommandBuilder::new_default_prog();
cmd.cwd(std::env::current_dir()?);
cmd.env("ATUIN_PTY_PROXY_SOCKET", sock_path.as_os_str());
cmd.env("ATUIN_PTY_PROXY_ACTIVE", "1");
let mut child = pair
.slave
.spawn_command(cmd)
.map_err(|e| eyre::eyre!("{e:#}"))?;
drop(pair.slave);
let mut pty_reader = pair
.master
.try_clone_reader()
.map_err(|e| eyre::eyre!("{e:#}"))?;
let mut pty_writer = pair
.master
.take_writer()
.map_err(|e| eyre::eyre!("{e:#}"))?;
let (msg_tx, msg_rx) = mpsc::sync_channel::<Msg>(64);
let current_cols = Arc::new(AtomicU16::new(cols.max(1)));
screen::spawn_parser_thread(rows, cols, msg_rx);
screen::spawn_socket_server(sock_path.clone(), msg_tx.clone());
spawn_resize_handler(pair.master, msg_tx.clone(), current_cols.clone())?;
terminal::enable_raw_mode()?;
let stdout_thread = std::thread::spawn(move || {
let mut stdout = std::io::stdout();
let mut highlighter = options.debug_osc133.then(Osc133DebugHighlighter::new);
let mut capture_tracker = options
.command_capture_sink
.as_ref()
.map(|_| CommandCaptureTracker::new(current_cols));
let mut buf = [0u8; 8192];
loop {
match pty_reader.read(&mut buf) {
Ok(0) | Err(_) => break,
Ok(n) => {
if let (Some(tracker), Some(sink)) = (
capture_tracker.as_mut(),
options.command_capture_sink.as_ref(),
) {
tracker.push(&buf[..n], sink);
}
if let Some(highlighter) = highlighter.as_mut() {
let rendered = highlighter.render(&buf[..n]);
let _ = msg_tx.try_send(Msg::Data(rendered.clone()));
if stdout.write_all(&rendered).is_err() {
break;
}
} else {
let _ = msg_tx.try_send(Msg::Data(buf[..n].to_vec()));
if stdout.write_all(&buf[..n]).is_err() {
break;
}
}
let _ = stdout.flush();
}
}
}
if highlighter.is_some() {
let _ = stdout.write_all(RESET);
let _ = stdout.flush();
}
});
std::thread::spawn(move || {
let mut stdin = std::io::stdin();
let mut buf = [0u8; 8192];
loop {
match stdin.read(&mut buf) {
Ok(0) | Err(_) => break,
Ok(n) => {
if pty_writer.write_all(&buf[..n]).is_err() {
break;
}
}
}
}
});
let status = child.wait()?;
let _ = stdout_thread.join();
let _ = terminal::disable_raw_mode();
let _ = std::fs::remove_file(&sock_path);
std::process::exit(process_exit_code(status.exit_code()));
}
fn spawn_resize_handler(
master: Box<dyn portable_pty::MasterPty + Send>,
resize_tx: mpsc::SyncSender<Msg>,
current_cols: Arc<AtomicU16>,
) -> eyre::Result<()> {
use signal_hook::consts::SIGWINCH;
use signal_hook::iterator::Signals;
let mut signals = Signals::new([SIGWINCH])?;
std::thread::spawn(move || {
for _ in signals.forever() {
if let Ok((cols, rows)) = terminal::size() {
current_cols.store(cols.max(1), Ordering::Relaxed);
let _ = master.resize(PtySize {
rows,
cols,
pixel_width: 0,
pixel_height: 0,
});
let _ = resize_tx.try_send(Msg::Resize { rows, cols });
}
}
});
Ok(())
}
fn process_exit_code(code: u32) -> i32 {
i32::try_from(code).unwrap_or(1)
}
#[cfg(test)]
mod tests {
use super::process_exit_code;
#[test]
fn process_exit_code_preserves_valid_values() {
assert_eq!(process_exit_code(0), 0);
assert_eq!(process_exit_code(127), 127);
assert_eq!(process_exit_code(i32::MAX as u32), i32::MAX);
}
#[test]
fn process_exit_code_defaults_when_out_of_range() {
assert_eq!(process_exit_code(i32::MAX as u32 + 1), 1);
}
}
|
