mirror of
https://github.com/rust-lang/cargo.git
synced 2025-09-25 11:14:46 +00:00
ab76a0bf3b
The config.toml file in rust-lang/rust has the omit-git-hash option, which prevents git information from being embedded into binaries. This works for most tools, as they rely on the git information provided by bootstrap through environment variables. Cargo does its own git detection in its build script though, which didn't adhere to to that option. This changes that by skipping git detection whenever bootstrap signals the option is enabled.
79 lines
2.5 KiB
Rust
79 lines
2.5 KiB
Rust
use flate2::{Compression, GzBuilder};
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use std::ffi::OsStr;
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use std::fs;
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use std::path::Path;
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use std::process::Command;
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fn main() {
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commit_info();
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compress_man();
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// ALLOWED: Accessing environment during build time shouldn't be prohibited.
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#[allow(clippy::disallowed_methods)]
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let target = std::env::var("TARGET").unwrap();
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println!("cargo:rustc-env=RUST_HOST_TARGET={target}");
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}
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fn compress_man() {
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// ALLOWED: Accessing environment during build time shouldn't be prohibited.
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#[allow(clippy::disallowed_methods)]
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let out_path = Path::new(&std::env::var("OUT_DIR").unwrap()).join("man.tgz");
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let dst = fs::File::create(out_path).unwrap();
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let encoder = GzBuilder::new()
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.filename("man.tar")
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.write(dst, Compression::best());
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let mut ar = tar::Builder::new(encoder);
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ar.mode(tar::HeaderMode::Deterministic);
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let mut add_files = |dir, extension| {
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let mut files = fs::read_dir(dir)
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.unwrap()
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.map(|e| e.unwrap().path())
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.collect::<Vec<_>>();
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files.sort();
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for path in files {
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if path.extension() != Some(extension) {
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continue;
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}
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println!("cargo:rerun-if-changed={}", path.display());
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ar.append_path_with_name(&path, path.file_name().unwrap())
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.unwrap();
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}
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};
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add_files(Path::new("src/etc/man"), OsStr::new("1"));
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add_files(Path::new("src/doc/man/generated_txt"), OsStr::new("txt"));
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let encoder = ar.into_inner().unwrap();
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encoder.finish().unwrap();
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}
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fn commit_info() {
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if !Path::new(".git").exists() {
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return;
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}
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// Var set by bootstrap whenever omit-git-hash is enabled in rust-lang/rust's config.toml.
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println!("cargo:rerun-if-env-changed=CFG_OMIT_GIT_HASH");
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#[allow(clippy::disallowed_methods)]
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if std::env::var_os("CFG_OMIT_GIT_HASH").is_some() {
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return;
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}
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let output = match Command::new("git")
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.arg("log")
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.arg("-1")
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.arg("--date=short")
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.arg("--format=%H %h %cd")
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.arg("--abbrev=9")
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.output()
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{
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Ok(output) if output.status.success() => output,
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_ => return,
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};
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let stdout = String::from_utf8(output.stdout).unwrap();
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let mut parts = stdout.split_whitespace();
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let mut next = || parts.next().unwrap();
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println!("cargo:rustc-env=CARGO_COMMIT_HASH={}", next());
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println!("cargo:rustc-env=CARGO_COMMIT_SHORT_HASH={}", next());
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println!("cargo:rustc-env=CARGO_COMMIT_DATE={}", next())
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}
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