Make hydra shut up

m/weasel/hydra.nix

@@ -1,7 +1,34 @@
-{ config, ... }:
+{ config, pkgs, lib, ... }:
 {
   services.hydra = {
     enable = true;
+
+    # Wrap hydra so it puts quiet flag every time... This is dumb and annoying,
+    # but i can't override the systemd ExecStart without running into infinite
+    # recursion.
+    package = pkgs.symlinkJoin {
+      name = "hydra-quiet";
+      paths = [ pkgs.hydra ];
+      postBuild = ''
+        for prog in hydra-queue-runner hydra-evaluator ; do
+          prev=$(realpath $out/bin/$prog)
+          rm $out/bin/$prog
+          cat >$out/bin/$prog <<EOF
+        #!/bin/sh
+        args=()
+        for arg in "\$@"; do
+          if [ "\$arg" != "-v" ]; then
+            args+=("\$arg")
+          fi
+        done
+        exec $prev --quiet "\''${args[@]}"
+        EOF
+
+          chmod +x $out/bin/$prog
+        done
+      '';
+    };
+
     hydraURL = "http://localhost:3001"; # externally visible URL
     notificationSender = "hydra@jungle.bsc.es"; # e-mail of Hydra service
     port = 3001;
@@ -12,6 +39,8 @@
     listenHost = "0.0.0.0"; # Force IPv4
   };
 
+  systemd.services.hydra-send-stats.enable = lib.mkForce false;
+
   networking.firewall.allowedTCPPorts = [ config.services.hydra.port ];
 
   nix.settings.extra-allowed-uris = [