tv source: make nixpkgs ref easily overridable

1 files changed, 21 insertions, 16 deletions

diff --git a/tv/source.nix b/tv/source.nix
index 7306cd954..4ede976d3 100644
--- a/tv/source.nix
+++ b/tv/source.nix
@@ -1,22 +1,27 @@
 with import <stockholm/lib>;
-host@{ name, secure ? false }: let
+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";
-    secrets.file = getAttr builder {
-      buildbot = toString <stockholm/tv/dummy_secrets>;
-      tv = "/home/tv/secrets/${name}";
-    };
-    stockholm.file = toString <stockholm>;
-    secrets-common.file = "/home/tv/secrets/common";
-    nixpkgs.git = {
-      url = https://github.com/NixOS/nixpkgs;
-      ref = "1b57bf274ae5c76e91b2b264d8aa8bfcecb72102"; # nixos-17.03
-    };
-  } // optionalAttrs secure {
-    secrets-master.file = "/home/tv/secrets/master";
-  }
+  evalSource (toString _file) [
+    {
+      nixos-config.symlink = "stockholm/tv/1systems/${name}/config.nix";
+      nixpkgs.git = {
+        # nixos-17.03
+        ref = mkDefault "1b57bf274ae5c76e91b2b264d8aa8bfcecb72102";
+        url = https://github.com/NixOS/nixpkgs;
+      };
+      secrets.file = getAttr builder {
+        buildbot = toString <stockholm/tv/dummy_secrets>;
+        tv = "/home/tv/secrets/${name}";
+      };
+      secrets-common.file = "/home/tv/secrets/common";
+      stockholm.file = toString <stockholm>;
+    }
+    (mkIf secure {
+      secrets-master.file = "/home/tv/secrets/master";
+    })
+    override
+  ]