Includes 3 functions for use in version strings in lib.rs/main.rs at compile time via a custom cargo build script.
Note: This currently only works for projects using git building on Linux or msys2. I haven't tested on Mac OS/X, but it will work if the date command exists. I plan to expand the functionality to additional platforms eventually.
```rust pub fn now() -> &'static str { // Output of 'date --rc-3339=ns' }
pub fn short_now() -> &'static str { // Output of 'date --rc-3339=date' }
pub fn sha() -> &'static str { // Output of 'git rev-parse HEAD' }
pub fn short_sha() -> &'static str { // Output of 'git rev-parse --short HEAD' }
pub fn commit_date() -> &'static str { // Output of 'git log --pretty=format:"%ad" -n1 --date=short' }
pub fn target() -> &'static str { // env::var("TARGET") }
pub fn semver() -> &'static str { // output of 'git describe' // this works best if you tag your releases 'vX.X.X' // and create a new tag on master after a release 'vX.X.Y-pre' } ```
toml
[package]
#
build = "build.rs"
#
[build-dependencies]
vergen = "*"
```rust use vergen::vergen;
fn main() { vergen(); } ```
```rust include!(concat!(env!("OUT_DIR"), "/version.rs"));
// The following is an exmaple. You could use now(), sha(), and semver() however you want. fn version() -> String { format!("{} {} {}", now(), sha(), semver()) // 2015-02-11 15:35:30.991638113-05:00 b8acdc17bbf0d9928f08b15cba6d3b659770a624 rh v0.0.1-pre-21-gb8acdc1 } ```