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|
use fs2::FileExt;
use std::ffi::OsStr;
use std::fs;
use std::io::Error;
use std::path::PathBuf;
use std::process::{Command, Stdio};
use tracing::{debug, info, warn};
pub struct Lock {
lock: Option<fs::File>,
}
impl Lock {
pub fn unlock(&mut self) {
self.lock = None
}
}
pub trait GitClonable {
fn clone_from(&self) -> String;
fn clone_to(&self) -> PathBuf;
fn extra_clone_args(&self) -> Vec<&OsStr>;
fn lock_path(&self) -> PathBuf;
fn lock(&self) -> Result<Lock, Error> {
debug!("Locking {:?}", self.lock_path());
match fs::File::create(self.lock_path()) {
Err(e) => {
warn!("Failed to create lock file {:?}: {}", self.lock_path(), e);
Err(e)
}
Ok(lock) => match lock.lock_exclusive() {
Err(e) => {
warn!(
"Failed to get exclusive lock on file {:?}: {}",
self.lock_path(),
e
);
Err(e)
}
Ok(_) => {
debug!("Got lock on {:?}", self.lock_path());
Ok(Lock { lock: Some(lock) })
}
},
}
}
fn clone_repo(&self) -> Result<(), Error> {
let mut lock = self.lock()?;
if self.clone_to().is_dir() {
debug!("Found dir at {:?}, initial clone is done", self.clone_to());
return Ok(());
}
info!(
"Initial cloning of {} to {:?}",
self.clone_from(),
self.clone_to()
);
let result = Command::new("git")
.arg("clone")
.args(self.extra_clone_args())
.arg(self.clone_from())
.arg(self.clone_to())
.stdout(Stdio::null())
.status()?;
lock.unlock();
if result.success() {
Ok(())
} else {
Err(Error::other(format!(
"Failed to clone from {:?} to {:?}",
self.clone_from(),
self.clone_to()
)))
}
}
fn fetch_repo(&self) -> Result<(), Error> {
let mut lock = self.lock()?;
info!("Fetching from origin in {:?}", self.clone_to());
let result = Command::new("git")
.arg("fetch")
.arg("origin")
.current_dir(self.clone_to())
.stdout(Stdio::null())
.status()?;
lock.unlock();
if result.success() {
Ok(())
} else {
Err(Error::other("Failed to fetch"))
}
}
fn clean(&self) -> Result<(), Error> {
let mut lock = self.lock()?;
debug!("git am --abort");
Command::new("git")
.arg("am")
.arg("--abort")
.current_dir(self.clone_to())
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()?;
debug!("git merge --abort");
Command::new("git")
.arg("merge")
.arg("--abort")
.current_dir(self.clone_to())
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()?;
debug!("git reset --hard");
Command::new("git")
.arg("reset")
.arg("--hard")
.current_dir(self.clone_to())
.stdout(Stdio::null())
.status()?;
debug!("git clean -x -d --force");
Command::new("git")
.arg("clean")
.arg("-x")
.arg("-d")
.arg("--force")
.current_dir(self.clone_to())
.stdout(Stdio::null())
.status()?;
lock.unlock();
Ok(())
}
fn checkout(&self, git_ref: &OsStr) -> Result<(), Error> {
let mut lock = self.lock()?;
debug!("git checkout {:?}", git_ref);
let result = Command::new("git")
.arg("checkout")
// we don't care if its dirty
.arg("--force")
.arg(git_ref)
.current_dir(self.clone_to())
.stdout(Stdio::null())
.status()?;
lock.unlock();
if result.success() {
Ok(())
} else {
Err(Error::other("Failed to checkout"))
}
}
}
|
