From 14492044394a875475b2159d51234ac1e35531bf Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Wed, 7 Sep 2022 18:02:13 +0200
Subject: [PATCH] Add warnings when features are not included in build

---
 src/db/lib.rs        | 3 +++
 src/garage/server.rs | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/src/db/lib.rs b/src/db/lib.rs
index 5304c195a..d96586be4 100644
--- a/src/db/lib.rs
+++ b/src/db/lib.rs
@@ -2,6 +2,9 @@
 #[cfg(feature = "sqlite")]
 extern crate tracing;
 
+#[cfg(not(any(feature = "lmdb", feature = "sled", feature = "sqlite")))]
+compile_error!("Must activate the Cargo feature for at least one DB engine: lmdb, sled or sqlite.");
+
 #[cfg(feature = "lmdb")]
 pub mod lmdb_adapter;
 #[cfg(feature = "sled")]
diff --git a/src/garage/server.rs b/src/garage/server.rs
index fb6d22792..3c96ff222 100644
--- a/src/garage/server.rs
+++ b/src/garage/server.rs
@@ -114,6 +114,11 @@ pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
 		));
 	}
 
+	#[cfg(not(feature = "metrics"))]
+	if config.admin_api.metrics_token.is_some() {
+		warn!("This Garage version is built without the metrics feature");
+	}
+
 	// Stuff runs
 
 	// When a cancel signal is sent, stuff stops