forked from extern/nushell
37 lines
1.0 KiB
Rust
37 lines
1.0 KiB
Rust
use std::path::Path;
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use std::{env, fs, io};
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fn main() -> Result<(), io::Error> {
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let out_dir = env::var_os("OUT_DIR").expect(
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"\
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OUT_DIR environment variable not found. \
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OUT_DIR is guaranteed to to exist in a build script by cargo - see \
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https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-build-scripts\
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");
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let latest_commit_hash = latest_commit_hash(env::current_dir()?).unwrap_or_default();
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let commit_hash_path = Path::new(&out_dir).join("git_commit_hash");
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fs::write(commit_hash_path, latest_commit_hash)?;
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Ok(())
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}
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#[allow(unused_variables)]
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fn latest_commit_hash<P: AsRef<Path>>(dir: P) -> Result<String, Box<dyn std::error::Error>> {
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#[cfg(feature = "git2")]
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{
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use git2::Repository;
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let dir = dir.as_ref();
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Ok(Repository::discover(dir)?
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.head()?
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.peel_to_commit()?
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.id()
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.to_string())
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}
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#[cfg(not(feature = "git2"))]
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{
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Ok(String::new())
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}
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}
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