build.rs: tell cargo to only rerun build.rs step if .git/HEAD changes
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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2
build.rs
2
build.rs
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@ -12,10 +12,12 @@ fn git_command(args: &[&str]) -> String {
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}
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}
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fn main() {
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fn main() {
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let repo_path = git_command(&["rev-parse", "--show-toplevel"]);
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let repoid = match env::var("REPOID") {
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let repoid = match env::var("REPOID") {
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Ok(repoid) => repoid,
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Ok(repoid) => repoid,
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Err(_) => git_command(&["rev-parse", "HEAD"]),
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Err(_) => git_command(&["rev-parse", "HEAD"]),
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};
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};
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println!("cargo:rustc-env=REPOID={}", repoid);
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println!("cargo:rustc-env=REPOID={}", repoid);
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println!("cargo:rerun-if-changed={}/.git/HEAD", repo_path);
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}
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}
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