cluster/catalog/default.nix

@@ -0,0 +1,52 @@
+{ config, lib, ... }:
+
+let
+  inherit (config) cluster flake;
+in
+
+{
+  perSystem = { config, pkgs, ... }: {
+    catalog.cluster = {
+      services = lib.mapAttrs (name: svc: {
+        description = "Cluster service: ${name}";
+        actions = let
+          mkDeployAction = { description, agents }: {
+            inherit description;
+            packages = [
+              config.packages.cachix
+              pkgs.tmux
+            ];
+            command = let
+              cachixDeployJson = pkgs.writeText "cachix-deploy.json" (builtins.toJSON {
+                agents = lib.genAttrs agents (name: builtins.unsafeDiscardStringContext flake.nixosConfigurations.${name}.config.system.build.toplevel);
+              });
+            in ''
+              set -e
+              echo building ${toString (lib.length agents)} configurations in parallel
+              tmux new-session ${lib.concatStringsSep " split-window " (
+                map (host: let
+                  drvPath = builtins.unsafeDiscardStringContext flake.nixosConfigurations.${host}.config.system.build.toplevel.drvPath;
+                in '' 'echo building configuration for ${host}; nix build -L --no-link --store "ssh-ng://${host}" --eval-store auto "${drvPath}^*"'\; '') agents
+              )} select-layout even-vertical
+
+              source ~/.config/cachix/deploy
+              cachix deploy activate ${cachixDeployJson}
+              echo
+            '';
+          };
+        in {
+          deployAll = mkDeployAction {
+            description = "Deploy ALL groups of this service.";
+            agents = lib.unique (lib.concatLists (lib.attrValues svc.nodes));
+          };
+        } // lib.mapAttrs' (group: agents: {
+          name = "deployGroup-${group}";
+          value = mkDeployAction {
+            description = "Deploy the '${group}' group of this service.";
+            inherit agents;
+          };
+        }) svc.nodes;
+      }) cluster.config.services;
+    };
+  };
+}

cluster/part.nix

@@ -1,6 +1,10 @@
 { depot, lib, ... }:
 
 {
+  imports = [
+    ./catalog
+  ];
+
   options.cluster = lib.mkOption {
     type = lib.types.raw;
   };