From 44e63a3d6c021e587b1d6b29cf40e57dac7df187 Mon Sep 17 00:00:00 2001
From: Steveplays <djspaargaren@outlook.com>
Date: Thu, 9 Jul 2026 17:04:33 +0200
Subject: [PATCH] Add Git information to cargo-gpu's `--version` CLI subcommand

Added the commit hash and date to the `--version` CLI subcommand.
---
 crates/cargo-gpu/build.rs   | 35 ++++++++++++++++++++++++++++-------
 crates/cargo-gpu/src/lib.rs |  2 +-
 2 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/crates/cargo-gpu/build.rs b/crates/cargo-gpu/build.rs
index 31a33575ce..0ae6551940 100644
--- a/crates/cargo-gpu/build.rs
+++ b/crates/cargo-gpu/build.rs
@@ -1,12 +1,33 @@
 //! cargo-gpu build script.
 
+use std::ffi::OsStr;
+
 fn main() {
-    let git_hash = std::process::Command::new("git")
-        .args(["rev-parse", "HEAD"])
-        .output()
-        .map_or_else(
-            |_| "unknown".to_owned(),
-            |output| String::from_utf8(output.stdout).unwrap_or_else(|_| "unknown".to_owned()),
-        );
+    let git_directory = invoke_git(["rev-parse", "--git-dir"]);
+    println!("cargo:rerun-if-changed={git_directory}/HEAD");
+
+    let git_hash = invoke_git(["rev-parse", "HEAD"]);
     println!("cargo:rustc-env=GIT_HASH={git_hash}");
+
+    let git_date = invoke_git([
+        "show",
+        "-s",
+        "--format=%cd",
+        "--date=format:%Y-%m-%d",
+        "HEAD",
+    ]);
+    println!("cargo:rustc-env=GIT_DATE={git_date}");
+}
+
+fn invoke_git<I, S>(args: I) -> String
+where
+    I: IntoIterator<Item = S>,
+    S: AsRef<OsStr>,
+{
+    std::process::Command::new("git")
+        .args(args)
+        .output()
+        .ok()
+        .and_then(|output| String::from_utf8(output.stdout).ok())
+        .unwrap_or_else(|| "unknown".to_owned())
 }
diff --git a/crates/cargo-gpu/src/lib.rs b/crates/cargo-gpu/src/lib.rs
index eadde1c8d8..a8759c0415 100644
--- a/crates/cargo-gpu/src/lib.rs
+++ b/crates/cargo-gpu/src/lib.rs
@@ -153,7 +153,7 @@ impl Command {
 
 /// the Cli struct representing the main cli
 #[derive(clap::Parser)]
-#[clap(author, version, about, subcommand_required = true)]
+#[clap(author, version, long_version = concat!(env!("CARGO_PKG_VERSION"), " (", env!("GIT_HASH"), "; ", env!("GIT_DATE"), ")"), about, subcommand_required = true)]
 #[non_exhaustive]
 pub struct Cli {
     /// The command to run.