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Fetch Git commit hash from HEROKU_SLUG_COMMIT if Git info not available #95

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merged 1 commit into from
Mar 5, 2024
Merged

Fetch Git commit hash from HEROKU_SLUG_COMMIT if Git info not available #95

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18 changes: 15 additions & 3 deletions build.rs
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Original file line number Diff line number Diff line change
@@ -1,13 +1,17 @@
use anyhow::{bail, Context};
use std::env;
use std::env::{var, VarError};
use std::io::ErrorKind;
use std::process::{Command, Stdio};

fn main() -> anyhow::Result<()> {
println!("cargo:rerun-if-changed=.git/HEAD");
println!("cargo:rerun-if-changed=.git/refs");
let pkg_version = getenv("CARGO_PKG_VERSION")?;
match get_commit_hash()? {
let mut commit = get_commit_hash()?;
if commit.is_none() {
commit = get_heroku_slug_commit()?;
}
match commit {
Some(commit) => {
println!("cargo:rustc-env=GIT_COMMIT={commit}");
println!("cargo:rustc-env=VERSION_WITH_GIT={pkg_version} (commit: {commit})");
Expand Down Expand Up @@ -58,6 +62,14 @@ fn get_commit_hash() -> anyhow::Result<Option<String>> {
}
}

fn get_heroku_slug_commit() -> anyhow::Result<Option<String>> {
match var("HEROKU_SLUG_COMMIT") {
Ok(slug) => Ok(Some(slug.chars().take(7).collect())),
Err(VarError::NotPresent) => Ok(None),
Err(VarError::NotUnicode(_)) => bail!("HEROKU_SLUG_COMMIT is not UTF-8"),
}
}

fn getenv(name: &str) -> anyhow::Result<String> {
env::var(name).with_context(|| format!("{name} envvar not set"))
var(name).with_context(|| format!("{name} envvar not set"))
}
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