introduce lib.mkFlake

This makes the most common use-case a tiny bit less verbose.

README.md

@@ -34,18 +34,15 @@ Otherwise, add the input,
     flake-modules-core.inputs.nixpkgs.follows = "nixpkgs";
 ```
 
-then slide `evalFlakeModule` between your outputs function head and body,
+then slide `mkFlake` between your outputs function head and body,
 
 ```
   outputs = { self, flake-modules-core, ... }:
-    (flake-modules-core.lib.evalFlakeModule
-      { inherit self; }
-      {
+    flake-modules-core.lib.mkFlake { inherit self; } {
       flake = {
         # Put your original flake attributes here.
       }
-      }
-    ).config.flake;
+    };
 ```
 
 Now you can add the remaining module attributes like in the [the template](./template/default/flake.nix).

lib.nix

@@ -38,6 +38,9 @@ let
         modules = [ ./all-modules.nix module ];
       };
 
+    mkFlake = args: module:
+      (flake-modules-core-lib.evalFlakeModule args module).config.flake;
+
     # For extending options in an already declared submodule.
     # Workaround for https://github.com/NixOS/nixpkgs/issues/146882
     mkSubmoduleOptions =

template/default/flake.nix

@@ -8,9 +8,7 @@
   };
 
   outputs = { self, flake-modules-core, ... }:
-    (flake-modules-core.lib.evalFlakeModule
-      { inherit self; }
-      {
+    flake-modules-core.mkFlake { inherit self; } {
       imports = [
         # To import a flake module
         # 1. Add foo to inputs
@@ -33,6 +31,5 @@
         # those are more easily expressed in perSystem.
 
       };
-      }
-    ).config.flake;
+    };
 }