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add build.rs for COMMIT environment variable

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hinto.janai 2023-12-07 21:15:41 -05:00
parent 76549cf519
commit 7fdd1b71eb
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1 changed files with 15 additions and 0 deletions
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15
cuprate/build.rs Normal file
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@ -0,0 +1,15 @@
// This sets the git `COMMIT` environment variable.
fn main() {
println!("cargo:rerun-if-changed=../.git/refs/heads/");
let output = std::process::Command::new("git")
.arg("rev-parse")
.arg("HEAD")
.output()
.unwrap();
let commit = String::from_utf8(output.stdout).unwrap();
assert!(commit.len() >= 40);
println!("cargo:rustc-env=COMMIT={commit}");
}