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use crate::args::Args;
use log::{error, info, warn};
use notify::{recommended_watcher, Event, EventKind, RecursiveMode, Watcher};
use std::{
fs::metadata,
io::{BufRead, BufReader},
path::Path,
process::{Child, Stdio},
result::Result,
sync::mpsc::channel,
time::Duration,
};
pub async fn watch_dir(args: Args) -> notify::Result<()> {
let (tx, rx) = channel();
let mut watcher = recommended_watcher(move |res: Result<Event, notify::Error>| {
tx.send(res).unwrap();
})
.unwrap();
watcher
.watch(args.dir.as_ref(), RecursiveMode::Recursive)
.unwrap();
info!("Waching directory: {:?}", args.dir);
info!("Please make any changes to starting");
let mut running_binary: Option<Child> = None;
loop {
match rx.recv_timeout(Duration::from_secs(5)) {
Ok(Ok(event)) => {
if let EventKind::Modify(modify_kind) = event.kind {
if matches!(modify_kind, notify::event::ModifyKind::Data(_)) {
let paths = event
.paths
.iter()
.filter(|path| !is_ignored(path, &args.ignore))
.collect::<Vec<_>>();
if !paths.is_empty() {
info!("File content changed: {:?}", paths);
if let Some(ref mut child) = running_binary {
match child.kill() {
Ok(_) => info!("Killed the running binary"),
Err(e) => error!("Failed to kill binary: {:?}", e),
}
}
if let Some(bin_path) = &args.bin_path {
if remove_old_binary(bin_path) {
if !binary_exists(bin_path) {
match run_command(args.command.clone()).await {
Ok(child) => {
let stdout = child.stdout.unwrap();
let stderr = child.stderr.unwrap();
let stdout_reader = BufReader::new(stdout);
let stderr_reader = BufReader::new(stderr);
for line in stdout_reader.lines() {
println!("{}", line.unwrap());
}
for line in stderr_reader.lines() {
eprintln!("{}", line.unwrap());
}
}
Err(e) => {
error!("Failed to run command: {}", e)
}
}
}
running_binary =
match restart_binary(bin_path, args.bin_arg.clone()) {
Ok(child) => Some(child),
Err(e) => {
error!("Failed to restart binary: {:?}", e);
None
}
}
}
} else {
match run_command(args.command.clone()).await {
Ok(child) => {
let stdout = child.stdout.unwrap();
let stderr = child.stderr.unwrap();
let stdout_reader = BufReader::new(stdout);
let stderr_reader = BufReader::new(stderr);
for line in stdout_reader.lines() {
println!("{}", line.unwrap());
}
for line in stderr_reader.lines() {
eprintln!("{}", line.unwrap());
}
}
Err(e) => {
error!("Failed to run command: {}", e)
}
}
}
}
}
}
}
Ok(Err(e)) => {
error!("Watch error: {:?}", e);
}
Err(std::sync::mpsc::RecvTimeoutError::Timeout) => {
continue;
}
Err(std::sync::mpsc::RecvTimeoutError::Disconnected) => {
break;
}
}
}
Ok(())
}
async fn run_command(cmd: String) -> Result<Child, Box<dyn std::error::Error>> {
let output = tokio::task::spawn_blocking(move || {
std::process::Command::new("sh")
.arg("-c")
.arg(cmd)
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.spawn()
.unwrap()
})
.await?;
Ok(output)
}
fn is_ignored<P: AsRef<Path>>(path: P, ignored_patterns: &[String]) -> bool {
let path_str = path.as_ref().to_str().unwrap_or("");
for pattern in ignored_patterns {
if path_str.ends_with(pattern) {
return true;
}
}
false
}
fn remove_old_binary(binary_path: &str) -> bool {
match metadata(binary_path) {
Ok(_) => {
warn!("Remove old binary: {}", binary_path);
match std::fs::remove_file(binary_path) {
Ok(_) => {
warn!("Old binary removed");
true
}
Err(e) => {
error!("Failed to remove binary: {:?}", e);
false
}
}
}
Err(_) => {
info!("No binary found to remove.");
true
}
}
}
fn binary_exists(binary_path: &str) -> bool {
metadata(binary_path).is_ok()
}
fn restart_binary(
binary_path: &str,
cmd_arg: Option<Vec<String>>,
) -> Result<Child, std::io::Error> {
info!("Restarting binary: {}", binary_path);
match cmd_arg {
Some(args) => match std::process::Command::new(binary_path).args(args).spawn() {
Ok(child) => {
info!("Binary started: {}", child.id());
Ok(child)
}
Err(e) => {
error!("Failed to restart: {:?}", e);
Err(e)
}
},
_ => match std::process::Command::new(binary_path).spawn() {
Ok(child) => {
info!("Binary started: {}", child.id());
Ok(child)
}
Err(e) => {
error!("Failed to restart: {:?}", e);
Err(e)
}
},
}
}