56 lines
1.4 KiB
Rust
56 lines
1.4 KiB
Rust
use std::process::Command;
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use std::{env, str};
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const BUILD_METADATA: &str = "SURREAL_BUILD_METADATA";
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fn main() {
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println!("cargo:rerun-if-env-changed={BUILD_METADATA}");
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println!("cargo:rerun-if-changed=lib");
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println!("cargo:rerun-if-changed=src");
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println!("cargo:rerun-if-changed=Cargo.toml");
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println!("cargo:rerun-if-changed=Cargo.lock");
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if let Some(metadata) = build_metadata() {
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println!("cargo:rustc-env={BUILD_METADATA}={metadata}");
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}
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}
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fn build_metadata() -> Option<String> {
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if let Ok(metadata) = env::var(BUILD_METADATA) {
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return Some(metadata);
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}
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let date = git()
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.args(["show", "--no-patch", "--format=%ad", "--date=format:%Y%m%d"])
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.output_string()?;
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let rev = git().args(["rev-parse", "--short", "HEAD"]).output_string()?;
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let repo_clean = git()
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.args(["diff", "--quiet"])
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.output()
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.map(|output| output.status.success())
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.unwrap_or_default();
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let metadata = if repo_clean {
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format!("{date}.{rev}")
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} else {
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format!("{date}.{rev}.dirty")
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};
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Some(metadata)
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}
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fn git() -> Command {
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Command::new("git")
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}
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trait CommandExt {
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fn output_string(&mut self) -> Option<String>;
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}
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impl CommandExt for Command {
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fn output_string(&mut self) -> Option<String> {
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self.output()
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.ok()
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.filter(|output| output.status.success())
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.and_then(|output| {
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str::from_utf8(&output.stdout).ok().map(|output| output.trim().to_string())
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})
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.filter(|output| !output.is_empty())
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}
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}
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