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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
use anyhow::Result;
use std::path::Path;
fn main() -> Result<()> {
// Copy hooks to appropriate location so that git will run them.
// In git worktrees, .git is a symlink and the following commands fail.
if Path::new(".git").is_dir() {
if !Path::new("./.git/hooks").exists() {
std::fs::create_dir_all("./.git/hooks")?;
}
std::fs::copy("./scripts/pre-commit", "./.git/hooks/pre-commit")?;
std::fs::copy("./scripts/pre-push", "./.git/hooks/pre-push")?;
}
// Supply information as compile-time environment variables.
#[cfg(feature = "opa-runtime")]
{
// Allow build systems (e.g. vcpkg, CI) to inject the commit hash directly
// via a GIT_HASH environment variable. If not set, attempt to read it from
// git. Fall back to "unknown" when git is unavailable or there is no .git
// directory (e.g. builds from source tarballs).
let git_hash = std::env::var("GIT_HASH").ok().unwrap_or_else(|| {
std::process::Command::new("git")
.args(["rev-parse", "HEAD"])
.output()
.ok()
.and_then(|o| {
if o.status.success() {
Some(o.stdout)
} else {
None
}
})
.and_then(|bytes| String::from_utf8(bytes).ok())
.map(|s| s.trim().to_string())
.unwrap_or_else(|| "unknown".to_string())
});
println!("cargo:rustc-env=GIT_HASH={git_hash}");
}
// Rerun only if build.rs changes.
println!("cargo:rerun-if-changed=build.rs");
Ok(())
}