| // Copyright 2017 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| 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(); |
| } |
| |
| // Try to get hash and date of the last commit on a best effort basis. If anything goes wrong |
| // (git not installed or if this is not a git repository) just return an empty string. |
| 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()) |
| } |