LICENSE

@@ -1,22 +0,0 @@
-MIT License
-
-Copyright (c) 2023 xeals
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-

flake.nix

@@ -11,24 +11,19 @@
       let
         pkgs = import nixpkgs { inherit system; };
         zig = pkgs.zig_0_11;
+        buildZigPackage = import ./nix/build-zig-package.nix {
+          inherit (pkgs) stdenv;
+          inherit zig;
+        };
       in
       {
         devShells.default = pkgs.mkShellNoCC {
           buildInputs = [ zig pkgs.zls ];
         };
 
-        packages.default = pkgs.stdenv.mkDerivation {
+        packages.default = buildZigPackage {
           name = "aoc23";
           src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
-
-          nativeBuildInputs = [ zig.hook ];
-
-          meta = {
-            description = "Advent of Code 2023";
-            homepage = "https://git.xeal.me/xeals/aoc23";
-            license = nixpkgs.lib.licenses.mit;
-            inherit (zig.meta) platforms;
-          };
         };
       });
 }

nix/build-zig-package.nix

@@ -0,0 +1,57 @@
+{ stdenv
+, zig
+}:
+
+{ buildInputs ? [ ]
+, nativeBuildInputs ? [ ]
+, optimize ? "ReleaseSafe"
+, meta ? { }
+, ...
+}@args:
+
+stdenv.mkDerivation (args // {
+  nativeBuildInputs = nativeBuildInputs ++ [
+    zig
+  ];
+
+  buildInputs = buildInputs;
+
+  strictDeps = true;
+
+  configurePhase = args.configurePhase or ''
+    runHook preConfigure
+    runHook postConfigure
+  '';
+
+  ZIGFLAGS = args.ZIGFLAGS or [
+    "-Doptimize=${optimize}"
+  ];
+
+  # https://github.com/ziglang/zig/issues/6810 requires setting XDG_CACHE_HOME
+  # in all zig build phases. --cache-dir and --global-cache-dir do not prevent
+  # the builder from attempting to create the XDG cache.
+
+  buildPhase = args.buildPhase or ''
+    runHook preBuild
+    XDG_CACHE_HOME=_cache zig build $ZIGFLAGS
+    runHook postBuild
+  '';
+
+  doCheck = args.doCheck or true;
+  checkPhase = args.checkPhase or ''
+    runHook preCheck
+    XDG_CACHE_HOME=_cache zig build test $ZIGFLAGS
+    runHook postCheck
+  '';
+
+  installPhase = args.installPhase or ''
+    runHook preInstall
+    XDG_CACHE_HOME=_cache zig build install --prefix $out $ZIGFLAGS
+    runHook postInstall
+  '';
+
+  meta = {
+    # default to Zig's platforms
+    platforms = zig.meta.platforms;
+  } // meta;
+})