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Merge pull request #868 from Michael-F-Bryan/git-version
Embed the git commit in fj-app's version number
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,81 @@ | ||
use std::{ | ||
path::PathBuf, | ||
process::{Command, Output, Stdio}, | ||
}; | ||
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fn main() { | ||
println!("cargo:rustc-env=FJ_VERSION_STRING={}", version_string()); | ||
} | ||
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fn version_string() -> String { | ||
let pkg_version = std::env::var("CARGO_PKG_VERSION").unwrap(); | ||
let commit = git_description(); | ||
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let official_release = | ||
std::env::var("FJ_OFFICIAL_RELEASE").as_deref() == Ok("1"); | ||
println!("cargo:rerun-if-env-changed=FJ_OFFICIAL_RELEASE"); | ||
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match (commit, official_release) { | ||
(Some(commit), true) => format!("{pkg_version} ({commit})"), | ||
(Some(commit), false) => { | ||
format!("{pkg_version} ({commit}, unreleased)") | ||
} | ||
(None, true) => pkg_version, | ||
(None, false) => format!("{pkg_version} (unreleased)"), | ||
} | ||
} | ||
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/// Try to get the current git commit. | ||
/// | ||
/// This may fail if `git` isn't installed (unlikely) or if the `.git/` folder | ||
/// isn't accessible (more likely than you think). This typically happens when | ||
/// we're building just the `fj-app` crate in a Docker container or when | ||
/// someone is installing from crates.io via `cargo install`. | ||
fn git_description() -> Option<String> { | ||
let crate_dir = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap()); | ||
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let mut cmd = Command::new("git"); | ||
cmd.args(["describe", "--always", "--dirty=-modified"]) | ||
.stdout(Stdio::piped()) | ||
.stderr(Stdio::piped()) | ||
.current_dir(&crate_dir); | ||
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let Output { | ||
status, | ||
stdout, | ||
stderr, | ||
} = cmd.output().ok()?; | ||
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let stdout = String::from_utf8_lossy(&stdout); | ||
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if !status.success() { | ||
// Not sure if anyone will ever see this, but it could be helpful for | ||
// troubleshooting. | ||
eprintln!("Command failed: {cmd:?}"); | ||
let stderr = String::from_utf8_lossy(&stderr); | ||
eprintln!("---- Stdout ----"); | ||
eprintln!("{stdout}"); | ||
eprintln!("---- Stderr ----"); | ||
eprintln!("{stderr}"); | ||
return None; | ||
} | ||
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// Make sure we re-run whenever the current commit changes | ||
let project_root = crate_dir.ancestors().nth(2).unwrap(); | ||
let head_file = project_root.join(".git").join("HEAD"); | ||
println!("cargo:rerun-if-changed={}", head_file.display()); | ||
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if let Ok(contents) = std::fs::read_to_string(&head_file) { | ||
// Most of the time the HEAD file will be `ref: refs/heads/$branch`, but | ||
// when it's a detached head we'll only get the commit hash and can skip | ||
// the rerun-if-changed logic. | ||
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if let Some((_, branch)) = contents.split_once(' ') { | ||
let commit_hash_file = | ||
project_root.join(".git").join(branch.trim()); | ||
println!("cargo:rerun-if-changed={}", commit_hash_file.display()); | ||
} | ||
} | ||
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Some(stdout.trim().to_string()) | ||
} |
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