ma: move systems to subdir, init source

makefu/source.nix

@@ -0,0 +1,29 @@
+with import <stockholm/lib>;
+host@{ name, secure ? false, override ? {} }: let
+  builder = if getEnv "dummy_secrets" == "true"
+              then "buildbot"
+              else "tv";
+  _file = <stockholm> + "/tv/1systems/${name}/source.nix";
+in
+  evalSource (toString _file) [
+    {
+      nixos-config.symlink = "stockholm/tv/1systems/${name}/config.nix";
+      nixpkgs.git = {
+        # nixos-17.03
+        ref = mkDefault "94941cb0455bfc50b1bf63186cfad7136d629f78";
+        url = https://github.com/NixOS/nixpkgs;
+      };
+      secrets.file = getAttr builder {
+        buildbot = toString <stockholm/tv/dummy_secrets>;
+        tv = "/home/tv/secrets/${name}";
+      };
+      stockholm.file = toString <stockholm>;
+    }
+    (mkIf (builder == "tv") {
+      secrets-common.file = "/home/tv/secrets/common";
+    })
+    (mkIf (builder == "tv" && secure) {
+      secrets-master.file = "/home/tv/secrets/master";
+    })
+    override
+  ]