Cargo.lock

@@ -1309,6 +1309,7 @@ dependencies = [
  "opentelemetry",
  "rand",
  "rmp-serde",
+ "rustc_version",
  "serde",
  "serde_json",
  "sha2 0.10.6",

Cargo.nix

@@ -32,7 +32,7 @@ args@{
   ignoreLockHash,
 }:
 let
-  nixifiedLockHash = "12ff12e9210c87ac93e2f2bdb7007b6232e7efcfa302c272bf0caee6e78abd10";
+  nixifiedLockHash = "d36a8590fdf6eeb128a5a852d55945b595d5830291ad0aca95a21dcc1fab8681";
   workspaceSrc = if args.workspaceSrc == null then ./. else args.workspaceSrc;
   currentLockHash = builtins.hashFile "sha256" (workspaceSrc + /Cargo.lock);
   lockHashIgnored = if ignoreLockHash
@@ -1861,6 +1861,9 @@ in
     devDependencies = {
       mktemp = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".mktemp."0.5.0" { inherit profileName; }).out;
     };
+    buildDependencies = {
+      rustc_version = (buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".rustc_version."0.4.0" { profileName = "__noProfile"; }).out;
+    };
   });
   
   "unknown".garage_web."0.8.1" = overridableMkRustCrate (profileName: rec {

src/api/admin/cluster.rs

@@ -20,6 +20,7 @@ pub async fn handle_get_cluster_status(garage: &Arc<Garage>) -> Result<Response<
 		node: hex::encode(garage.system.id),
 		garage_version: garage_util::version::garage_version(),
 		garage_features: garage_util::version::garage_features(),
+		rust_version: garage_util::version::rust_version(),
 		db_engine: garage.db.engine(),
 		known_nodes: garage
 			.system
@@ -106,6 +107,7 @@ struct GetClusterStatusResponse {
 	node: String,
 	garage_version: &'static str,
 	garage_features: Option<&'static [&'static str]>,
+	rust_version: &'static str,
 	db_engine: String,
 	known_nodes: HashMap<String, KnownNodeResp>,
 	layout: GetClusterLayoutResponse,

src/garage/admin.rs

@@ -820,11 +820,12 @@ impl AdminRpcHandler {
 		let mut ret = String::new();
 		writeln!(
 			&mut ret,
-			"\nGarage version: {} [features: {}]",
+			"\nGarage version: {} [features: {}]\nRust compiler version: {}",
 			garage_util::version::garage_version(),
 			garage_util::version::garage_features()
 				.map(|list| list.join(", "))
 				.unwrap_or_else(|| "(unknown)".into()),
+			garage_util::version::rust_version(),
 		)
 		.unwrap();
 

src/rpc/system_metrics.rs

@@ -31,10 +31,10 @@ impl SystemMetrics {
 				.u64_value_observer("garage_build_info", move |observer| {
 					observer.observe(
 						1,
-						&[KeyValue::new(
-							"version",
-							garage_util::version::garage_version(),
-						)],
+						&[
+							KeyValue::new("rustversion", garage_util::version::rust_version()),
+							KeyValue::new("version", garage_util::version::garage_version()),
+						],
 					)
 				})
 				.with_description("Garage build info")

src/util/Cargo.toml

@@ -47,6 +47,9 @@ hyper = "0.14"
 
 opentelemetry = { version = "0.17", features = [ "rt-tokio", "metrics", "trace" ] }
 
+[build-dependencies]
+rustc_version = "0.4.0"
+
 [dev-dependencies]
 mktemp = "0.5"
 

src/util/build.rs

@@ -0,0 +1,8 @@
+use rustc_version::version;
+
+fn main() {
+	// Acquire the version of Rust used to compile, this is added as a label to
+	// the garage_build_info metric.
+	let v = version().unwrap();
+	println!("cargo:rustc-env=RUSTC_VERSION={v}");
+}

src/util/version.rs

@@ -26,3 +26,7 @@ pub fn init_version(version: &'static str) {
 pub fn init_features(features: &'static [&'static str]) {
 	FEATURES.store(Some(Arc::new(features)));
 }
+
+pub fn rust_version() -> &'static str {
+	env!("RUSTC_VERSION")
+}