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denoland-deno/cli/lib/build.rs

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Rust
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// Copyright 2018-2025 the Deno authors. MIT license.
fn main() {
let commit_hash = git_commit_hash();
println!("cargo:rustc-env=GIT_COMMIT_HASH={}", commit_hash);
println!("cargo:rerun-if-env-changed=GIT_COMMIT_HASH");
println!(
"cargo:rustc-env=GIT_COMMIT_HASH_SHORT={}",
&commit_hash[..7]
);
}
fn git_commit_hash() -> String {
if let Ok(output) = std::process::Command::new("git")
.arg("rev-list")
.arg("-1")
.arg("HEAD")
.output()
{
if output.status.success() {
std::str::from_utf8(&output.stdout[..40])
.unwrap()
.to_string()
} else {
// When not in git repository
// (e.g. when the user install by `cargo install deno`)
"UNKNOWN".to_string()
}
} else {
// When there is no git command for some reason
"UNKNOWN".to_string()
}
}