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use std::{env, process};
use chrono::{TimeZone, Utc};
use rustc_version::{version_meta, Channel};
fn main() {
// allow unknown lints in nightly builds
if let Ok(meta) = version_meta() {
if meta.channel == Channel::Nightly {
println!("cargo:rustc-cfg=allow_unknown_lints");
println!("cargo:rustc-cfg=include_nightly_lints");
}
}
// Make the current git hash available to the build
if let Some(rev) = git_revision_hash() {
println!("cargo:rustc-env=GIRT_BUILD_GIT_HASH={rev}");
}
// Use provided SOURCE_DATE_EPOCH to make builds reproducible
let build_date = match env::var("SOURCE_DATE_EPOCH") {
Ok(val) => Utc.timestamp_opt(val.parse::<i64>().unwrap(), 0).unwrap(),
Err(_) => Utc::now(),
};
println!("cargo:rustc-env=GIRT_BUILD_DATE={}", build_date.format("%Y-%m-%d"));
}
fn git_revision_hash() -> Option<String> {
let result = process::Command::new("git")
.args(["rev-parse", "--short=10", "HEAD"])
.output();
result.ok().and_then(|output| {
let v = String::from(String::from_utf8_lossy(&output.stdout).trim());
if v.is_empty() { None } else { Some(v) }
})
}
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