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Tweak git status *again*

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Turns out that in order to go from clean to dirty you need to
watch *everything*. Caching is hard, man.
This commit is contained in:
John Doty 2024-08-09 14:04:06 -07:00
parent c6aa657b4c
commit e32f27494a
1 changed files with 27 additions and 17 deletions
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44
build.rs
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@ -84,23 +84,6 @@ fn emit_git_dirty() {
let output =
std::str::from_utf8(&output.stdout).expect("git did not output utf8");
// If there *was* any output, parse it and tell cargo to re-run if any of
// these files changed. (Maybe they get reverted! Then the repo status
// will change.)
let mut split = output.split('\x00');
while let Some(field) = split.next() {
if field.is_empty() {
continue;
}
let prefix = &field[0..3];
println!("cargo::rerun-if-changed={}", &field[3..]);
let b = prefix.as_bytes();
if b[0] == b'R' || b[1] == b'R' || b[0] == b'C' || b[1] == b'C' {
if let Some(additional) = split.next() {
println!("cargo::rerun-if-changed={additional}");
}
}
}
// Emit the repository status.
let dirty = if output.trim().is_empty() {
""
@ -108,6 +91,33 @@ fn emit_git_dirty() {
" *dirty*"
};
println!("cargo::rustc-env=REPO_DIRTY={dirty}");
// NOW: The output here has to do with *all* of the files in the git
// respository. (Because if nothing was modified, but then *becomes*
// modified, we need to rerun the script to notice the dirty bit.)
// `git-ls-files` is the way to do that.
let output = std::process::Command::new("git")
.arg("ls-files")
.arg("-z")
.arg("--cached")
.arg("--deleted")
.arg("--modified")
.arg("--others")
.arg("--exclude-standard")
.output()
.expect("could not spawn `git` to get repository status");
if !output.status.success() {
let stderr = std::str::from_utf8(&output.stderr)
.expect("git failed and stderr was not utf-8");
eprintln!("`git ls-files` failed, stderr: {stderr}");
panic!("`git ls-files` failed");
}
let output =
std::str::from_utf8(&output.stdout).expect("git did not output utf8");
for fname in output.split_terminator("\0") {
println!("cargo::rerun-if-changed={fname}");
}
}
fn main() {