Make git rev-parse in build.rs optional with graceful fallback (#701)

* Initial plan

* Make git rev-parse optional in build.rs, fall back to empty string

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* Use \"unknown\" as fallback for GIT_HASH; also honour GIT_HASH env var override

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* Fix cargo fmt formatting in build.rs

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---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: anakrish <35780660+anakrish@users.noreply.github.com>
This commit is contained in:
Copilot
2026-04-30 15:43:55 -05:00
committed by GitHub
parent 4c92fb4d92
commit b148d64b2b
2 changed files with 21 additions and 6 deletions

View File

@@ -18,11 +18,26 @@ fn main() -> Result<()> {
// Supply information as compile-time environment variables.
#[cfg(feature = "opa-runtime")]
{
let output = std::process::Command::new("git")
.args(["rev-parse", "HEAD"])
.output()
.expect("`git rev-parse HEAD` failed.");
let git_hash = String::from_utf8(output.stdout).unwrap();
// 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}");
}

View File

@@ -24,7 +24,7 @@ fn opa_runtime(span: &Span, params: &[Ref<Expr>], args: &[Value], _strict: bool)
obj.insert(
Value::String("commit".into()),
Value::String(env!("GIT_HASH").into()),
Value::String(option_env!("GIT_HASH").unwrap_or("").into()),
);
obj.insert(