vergen

Version

Basic Usage

The following code is optionally generated in the Cargo OUT_DIR in version.rs. ```rust pub fn now() -> &'static str { // RFC3339 formatted string representing now (UTC) }

pub fn short_now() -> &'static str { // Short string representing now (UTC) }

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' } ```

Cargo.toml

toml [package] # build = "build.rs" # [build-dependencies] vergen = "~0.1.0"

build.rs

```rust use vergen::vergen;

fn main() { // Turn on all flags to start. let mut flags = OutputFns::all(); // Toggle output fns you don't want generated. flags.toggle(NOW); // Generate the version.rs file in the Cargo OUTDIR. assert!(vergen(flags).isok()); } ```

lib.rs/main.rs

```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 } ```