oxedyne/fe2o3 — fe2o3_austenite/build.rs

1.8 KiB, 1 run

created by r1870400018:59837, which is this file's identity for as long as the history lasts, whatever it is later renamed to

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1	//! Captures the git commit the engine is built from, for `compile::engine_git_hash` and the wasm
2	//! `engineInfo()`. No git, or no repository, yields `unknown` rather than failing the build.
3
4	use std::path::Path;
5	use std::process::Command;
6
7	fn main() {
8	let hash = match git(&["rev-parse", "--short=12", "HEAD"]) {
9	Some(h) if !h.is_empty() => {
10	// Dirty only for this crate's own tree, so an unrelated edit elsewhere in the workspace does
11	// not mark the engine.
12	match git(&["status", "--porcelain", "--", "."]) {
13	Some(s) if !s.is_empty() => format!("{}-dirty", h),
14	_ => h,
15	}
16	},
17	_ => "unknown".to_string(),
18	};
19	println!("cargo:rustc-env=AUSTENITE_GIT_HASH={}", hash);
20
21	// Naming any rerun trigger turns off Cargo's default of rerunning on every package file, so the
22	// crate's sources are named alongside the git state a commit or checkout moves.
23	println!("cargo:rerun-if-changed=build.rs");
24	println!("cargo:rerun-if-changed=Cargo.toml");
25	println!("cargo:rerun-if-changed=src");
26	if let Some(dir) = git(&["rev-parse", "--git-dir"]) {
27	println!("cargo:rerun-if-changed={}", Path::new(&dir).join("HEAD").display());
28	println!("cargo:rerun-if-changed={}", Path::new(&dir).join("index").display());
29	}
30	if let Some(dir) = git(&["rev-parse", "--git-common-dir"]) {
31	println!("cargo:rerun-if-changed={}", Path::new(&dir).join("packed-refs").display());
32	if let Some(head_ref) = git(&["symbolic-ref", "-q", "HEAD"]) {
33	println!("cargo:rerun-if-changed={}", Path::new(&dir).join(head_ref).display());
34	}
35	}
36	}
37
38	/// The trimmed standard output of a successful git command, or `None`.
39	fn git(args: &[&str]) -> Option<String> {
40	match Command::new("git").args(args).output() {
41	Ok(out) if out.status.success() => match String::from_utf8(out.stdout) {
42	Ok(s) => Some(s.trim().to_string()),
43	Err(_) => None,
44	},
45	_ => None,
46	}
47	}