hydra: add nixmsi as builder

flake.nix

@@ -319,14 +319,7 @@
     nixosImages.phone = nixosConfigurations.phone.config.mobile.outputs.disk-image;
     nixosImages.phone-fastboot = nixosConfigurations.phone.config.mobile.outputs.android.android-fastboot-image;
 
-    hydraJobs = let
-      addMeta = x: x // {
-        meta = (x.meta or {}) // {
-          timeout = 60 * 60 * 10;
-          maxSilent = 60 * 60 * 10;
-        };
-      };
-    in builtins.mapAttrs (_: addMeta) {
+    hydraJobs = {
       server.${config.server.system} = nixosConfigurations.server.config.system.build.toplevel;
       workstation.${config.nixmsi.system} = nixosConfigurations.nixmsi.config.system.build.toplevel;
       router.${config.router-emmc.system} = nixosConfigurations.router-emmc-cross.config.system.build.toplevel;

system/hosts/nixmsi.nix

@@ -151,8 +151,13 @@
   programs.ccache.enable = true;
   services.sshd.enable = true;
   boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
+  users.users.hydra-builder = {
+    uid = 1001;
+    isNormalUser = true;
+  };
   nix.settings = {
     netrc-file = "/secrets/netrc";
+    trusted-users = [ "hydra-builder" ];
     substituters = [
       "https://binarycache.pavluk.org"
       "https://cache.nixos.org/"

system/hosts/server/home.nix

@@ -146,6 +146,16 @@ in {
       supportedFeatures = [ "kvm" "local" "nixos-test" "benchmark" "big-parallel" ];
       systems = [ "builtin" "x86_64-linux" "aarch64-linux" ];
     }
+    {
+      hostName = cfg.laptopHostname;
+      maxJobs = 1;
+      speedFactor = 2;
+      protocol = "ssh-ng";
+      systems = [ "x86_64-linux" ];
+      supportedFeatures = [ "kvm" "nixos-test" "benchmark" "big-parallel" ];
+      sshKey = "/secrets/hydra-builder-key";
+      sshUser = "hydra-builder";
+    }
   ];
   # limit CI CPU usage since I'm running everything else off this server too
   systemd.services.nix-daemon.serviceConfig.CPUQuota = "100%";

system/hosts/server/options.nix

@@ -9,6 +9,11 @@
           default = "pavluk.org";
           description = "domain name";
         };
+        laptopHostname = mkOption {
+          type = with types; nullOr str;
+          default = null;
+          description = "laptop hostname";
+        };
         keycloakRealm = mkOption {
           type = types.str;
           default = "master";