Add a default.nix for referencing machines.

At the moment this is also the release Nix expression we're going to use
for Hydra. Right now, the machine expressions don't evaluate because
they're lacking hardware information. But apart from that we should get
out full system builds afterwards.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/default.nix b/default.nix
new file mode 100644
index 00000000..9504284b
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,17 @@
+with import <nixpkgs/lib>;
+
+let
+  genFromNixFiles = path: let
+    isNixFile = name: type: hasSuffix ".nix" name && type == "regular";
+    importNixFile = name: const {
+      name = removeSuffix ".nix" name;
+      value = import (builtins.toPath "${path}/${name}");
+    };
+  in mapAttrs' importNixFile (filterAttrs isNixFile (builtins.readDir path));
+
+in {
+  machines = mapAttrs (_: cfg: (import <nixpkgs/nixos/lib/eval-config.nix> {
+    system = "x86_64-linux";
+    modules = [ cfg ];
+  }).config.system.build.toplevel) (genFromNixFiles ./machines);
+}