Files
xboct-deploy/src/git.rs
T

115 lines
3.1 KiB
Rust

use std::path::Path;
use std::process::Command;
use anyhow::{Context, Result, bail};
pub fn current_branch(workdir: &Path) -> Result<Option<String>> {
let out = match Command::new("git")
.current_dir(workdir)
.args(["rev-parse", "--abbrev-ref", "HEAD"])
.output()
{
Ok(out) => out,
Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
bail!("`git` not found in PATH — install git to use the 'branch' check")
}
Err(err) => return Err(err).context("failed to spawn `git`"),
};
if !out.status.success() {
let stderr = String::from_utf8_lossy(&out.stderr);
let fail = stderr.trim();
if fail.contains("not a git repository")
|| fail.contains("not inside any git repository")
|| fail.contains("does not appear to be a git repository")
{
return Ok(None);
}
bail!("`git rev-parse` failed: {}", fail);
}
let name = String::from_utf8(out.stdout)
.context("git returned non-UTF-8 output")?
.trim()
.to_string();
if name.is_empty() {
return Ok(None);
}
Ok(Some(name))
}
#[cfg(test)]
mod tests {
use super::*;
use std::fs;
use std::path::PathBuf;
fn tmpdir(tag: &str) -> PathBuf {
let dir =
std::env::temp_dir().join(format!("xboct-deploy-git-{}-{tag}", std::process::id()));
let _ = fs::remove_dir_all(&dir);
fs::create_dir_all(&dir).unwrap();
dir
}
fn git(dir: &Path, args: &[&str]) {
let status = Command::new("git")
.current_dir(dir)
.args(args)
.status()
.unwrap();
assert!(status.success(), "git {args:?} failed in {}", dir.display());
}
fn git_repo(tag: &str) -> PathBuf {
let dir = tmpdir(tag);
git(&dir, &["init", "-b", "test"]);
fs::write(dir.join("f.txt"), "hi").unwrap();
git(&dir, &["add", "."]);
git(
&dir,
&[
"-c",
"user.email=t@t",
"-c",
"user.name=t",
"commit",
"-m",
"init",
],
);
dir
}
#[test]
fn returns_branch_in_repo() {
let dir = git_repo("branch");
assert_eq!(current_branch(&dir).unwrap().as_deref(), Some("test"));
let _ = fs::remove_dir_all(dir);
}
#[test]
fn returns_head_when_detached() {
let dir = git_repo("detached");
git(&dir, &["switch", "--detach"]);
assert_eq!(current_branch(&dir).unwrap().as_deref(), Some("HEAD"));
let _ = fs::remove_dir_all(dir);
}
#[test]
fn returns_none_outside_repo() {
let dir = tmpdir("norepo");
assert_eq!(current_branch(&dir).unwrap(), None);
let _ = fs::remove_dir_all(dir);
}
#[test]
fn works_from_subdirectory() {
let dir = git_repo("subdir");
let sub = dir.join("inner");
fs::create_dir_all(&sub).unwrap();
assert_eq!(current_branch(&sub).unwrap().as_deref(), Some("test"));
let _ = fs::remove_dir_all(dir);
}
}