use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
use std::process::Command;
fn main() {
let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out_dir.join("commit-info.txt"))
.unwrap()
.write_all(commit_info().as_bytes())
.unwrap();
}
fn commit_info() -> String {
match (commit_hash(), commit_date()) {
(Some(hash), Some(date)) => format!(" ({} {})", hash.trim_right(), date),
_ => String::new(),
}
}
fn commit_hash() -> Option<String> {
Command::new("git")
.args(&["rev-parse", "--short", "HEAD"])
.output()
.ok()
.and_then(|r| String::from_utf8(r.stdout).ok())
}
fn commit_date() -> Option<String> {
Command::new("git")
.args(&["log", "-1", "--date=short", "--pretty=format:%cd"])
.output()
.ok()
.and_then(|r| String::from_utf8(r.stdout).ok())
}