63 lines
2.1 KiB
Rust
63 lines
2.1 KiB
Rust
use std::borrow::Cow;
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use std::path::Path;
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use std::process::Command;
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const VERSION: &str = include_str!("../VERSION");
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fn main() {
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let git_hash = Command::new("git")
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.args(["rev-parse", "HEAD"])
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.output()
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.ok()
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.filter(|output| output.status.success())
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.and_then(|x| String::from_utf8(x.stdout).ok());
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let version: Cow<_> = match &git_hash {
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Some(git_hash) => format!("{} ({})", VERSION, &git_hash[..8]).into(),
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None => VERSION.into(),
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};
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println!(
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"cargo:rustc-env=BUILD_TARGET={}",
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std::env::var("TARGET").unwrap()
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);
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println!("cargo:rerun-if-changed=../VERSION");
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println!("cargo:rustc-env=VERSION_AND_GIT_HASH={}", version);
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if git_hash.is_none() {
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return;
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}
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// we need to revparse because the git dir could be anywhere if you are
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// using detached worktrees but there is no good way to obtain an OsString
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// from command output so for now we can't accept non-utf8 paths here
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// probably rare enouch where it doesn't matter tough we could use gitoxide
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// here but that would be make it a hard dependency and slow compile times
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let Some(git_dir): Option<String> = Command::new("git")
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.args(["rev-parse", "--git-dir"])
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.output()
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.ok()
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.filter(|output| output.status.success())
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.and_then(|x| String::from_utf8(x.stdout).ok())
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else{ return; };
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// If heads starts pointing at something else (different branch)
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// we need to return
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let head = Path::new(&git_dir).join("HEAD");
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if head.exists() {
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println!("cargo:rerun-if-changed={}", head.display());
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}
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// if the thing head points to (branch) itself changes
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// we need to return
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let Some(head_ref): Option<String> = Command::new("git")
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.args(["symbolic-ref", "HEAD"])
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.output()
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.ok()
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.filter(|output| output.status.success())
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.and_then(|x| String::from_utf8(x.stdout).ok())
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else{ return; };
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let head_ref = Path::new(&git_dir).join(head_ref);
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if head_ref.exists() {
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println!("cargo:rerun-if-changed={}", head_ref.display());
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}
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}
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