From 39249c5956821e988f7c8782daa6f55a5e8f5e1a Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Mon, 5 Oct 2020 17:36:39 +0200
Subject: [PATCH] flake: Add build and eval functions

---
 flake.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/flake.nix b/flake.nix
index fe4d516..8388e0b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,9 +19,17 @@
       arion = import ./nix/arion.nix { inherit pkgs; };
     });
 
+    # Does not include the eval and build functions like you may expect from Nixpkgs.
     defaultPackage = lib.genAttrs systems (system:
       self.packages.${system}.arion
     );
 
+    lib = {
+      eval = import ./src/nix/eval-composition.nix;
+      build = args@{...}:
+        let composition = self.lib.eval args;
+        in composition.config.out.dockerComposeYaml;
+    };
+
   };
 }