modules/build-machines: Add remote builders and enable on tomato

2 files changed, 33 insertions, 0 deletions

diff --git a/modules/build-machines.nix b/modules/build-machines.nix
new file mode 100644
index 0000000..12409db
--- /dev/null
+++ b/modules/build-machines.nix
@@ -0,0 +1,32 @@
+{lib, config, ...}:
+
+let
+  machines = {
+    pinto = {
+      maxJobs = 2;
+      protocol = "ssh-ng";
+      supportedFeatures = ["big-parallel" "kvm"];
+    };
+  };
+  enabled = config.this.buildMachines;
+
+  inherit (lib.attrsets) filterAttrs;
+in
+{
+  options = {
+    this.buildMachines = lib.mkOption {
+      type = with lib.types; listOf str;
+      default = [];
+    };
+  };
+
+  config = {
+    nix.buildMachines = builtins.map
+      (m: machines."${m}" // { hostName = m; })
+      enabled;
+    nix.distributedBuilds = (enabled == []);
+    nix.extraOptions = lib.mkIf (enabled != []) ''
+      builders-use-substitutes = true
+    '';
+  };
+}
diff --git a/modules/default.nix b/modules/default.nix
index 36c6f66..06f0fb3 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -14,6 +14,7 @@
     ./hosts.nix
     ./bluetooth.nix
     ./unfree.nix
+    ./build-machines.nix
     ./overlays
   ];