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use std::env;
use git::Handle as GitHandle;
fn main() {
// Overwrites the package `version` to include metadata, and package `name` to be 'hermes'
// (the binary name), instead of 'ibc-relayer-cli' (which is the crate name), so that abscissa
// outputs consistent usage and help messages.
// https://github.com/informalsystems/hermes/issues/590
// Note: This can potentially break the normal cargo (or crates.io) workflow.
println!("cargo:rustc-env=CARGO_PKG_NAME=hermes");
println!("cargo:rustc-env=CARGO_PKG_VERSION={}", version());
}
// returns a valid semver string optionally suffixed with the current git branch and last commit
// hash. e.g. 0.4.0 or 0.4.0+cli-git-hash-eb0e94fc-dirty
fn version() -> String {
let mut vers = env::var("CARGO_PKG_VERSION").unwrap();
if !is_ci_release() {
if let Some(git) = GitHandle::new() {
println!("cargo:rustc-rerun-if-changed=.git/HEAD");
vers.push('+');
vers.push_str(&git.last_commit_hash());
if git.is_dirty() {
vers.push_str("-dirty");
}
vers = vers.replace('\n', "");
}
}
vers
}
fn is_ci_release() -> bool {
matches!(env::var("GITHUB_JOB"), Ok(job) if job == "create-release")
}
mod git {
use core::marker::PhantomData;
use std::ffi::OsStr;
use std::process::{Command, Output};
// A wrapper over a git shell command that is only constructable if git is available & the
// current directory is a git repository
pub struct Handle(PhantomData<Command>);
impl Handle {
pub fn new() -> Option<Self> {
if Self::is_git_repo() {
Some(Handle(PhantomData))
} else {
None
}
}
// Returns the short hash of the last git commit
pub fn last_commit_hash(&self) -> String {
let commit = Self::command(["rev-parse", "--short", "HEAD"]);
String::from_utf8_lossy(&commit.stdout).into_owned()
}
// Checks if the git repo is dirty
pub fn is_dirty(&self) -> bool {
!Self::command(["diff-index", "--quiet", "HEAD", "--"])
.status
.success()
}
#[inline]
fn command(args: impl IntoIterator<Item = impl AsRef<OsStr>>) -> Output {
Command::new("git").args(args).output().unwrap()
}
// returns true iff git is installed and current directory is a git repo
fn is_git_repo() -> bool {
Command::new("git")
.args(["rev-parse", "--git-dir"])
.output()
.is_ok_and(|o| o.status.success())
}
}
}