Makes a file available to a Rust project at build time containing the latest commit's sha and summary as static vars.
Shamelessly adapted from cstorey/git-build-version.
Invoke this tool in your package build step. In Cargo.toml, add it as a build dep:
```toml [package] name = "something-gratuitously-mentioning-rust" build = "build.rs"
[build-dependencies] git-latest-commit = "0.1.0" ```
Then, in build.rs at the top level of your project:
```rs extern crate gitlatestcommit;
const PACKAGETOPDIR : &'static str = ".";
fn main() { gitlatestcommit::write(PACKAGETOPDIR).expect("Exporting git commit info."); } ```
ISC