nushell/crates/nu-cli/build.rs
2020-10-21 05:35:43 +13:00

37 lines
1.0 KiB
Rust

use std::path::Path;
use std::{env, fs, io};
fn main() -> Result<(), io::Error> {
let out_dir = env::var_os("OUT_DIR").expect(
"\
OUT_DIR environment variable not found. \
OUT_DIR is guaranteed to exist in a build script by cargo - see \
https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-build-scripts\
");
let latest_commit_hash = latest_commit_hash(env::current_dir()?).unwrap_or_default();
let commit_hash_path = Path::new(&out_dir).join("git_commit_hash");
fs::write(commit_hash_path, latest_commit_hash)?;
Ok(())
}
#[allow(unused_variables)]
fn latest_commit_hash<P: AsRef<Path>>(dir: P) -> Result<String, Box<dyn std::error::Error>> {
#[cfg(feature = "git2")]
{
use git2::Repository;
let dir = dir.as_ref();
Ok(Repository::discover(dir)?
.head()?
.peel_to_commit()?
.id()
.to_string())
}
#[cfg(not(feature = "git2"))]
{
Ok(String::new())
}
}