refactor: fix flake checks, make package definitions easier

.gitignore

@@ -8,3 +8,4 @@ node_modules/
 .direnv/
 .envrc
 build/
+result/

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1747327360,
-        "narHash": "sha256-LSmTbiq/nqZR9B2t4MRnWG7cb0KVNU70dB7RT4+wYK4=",
+        "lastModified": 1749285348,
+        "narHash": "sha256-frdhQvPbmDYaScPFiCnfdh3B/Vh81Uuoo0w5TkWmmjU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e06158e58f3adee28b139e9c2bcfcc41f8625b46",
+        "rev": "3e3afe5174c561dee0df6f2c2b2236990146329f",
         "type": "github"
       },
       "original": {

flake.nix

@@ -10,9 +10,62 @@
     nixpkgs,
   }: let
     inherit (nixpkgs) lib;
+
     systems = lib.systems.flakeExposed;
     forAllSystems = lib.genAttrs systems;
     nixpkgsFor = forAllSystems (system: nixpkgs.legacyPackages.${system});
+
+    date = let
+      # YYYYMMDD
+      date' = lib.substring 0 8 self.lastModifiedDate;
+      year = lib.substring 0 4 date';
+      month = lib.substring 4 2 date';
+      day = lib.substring 6 2 date';
+    in
+      if (self ? lastModifiedDate)
+      then lib.concatStringsSep "-" [year month day]
+      else "unknown";
+
+    mkClayPackage = {
+      system,
+      version,
+      src,
+      suffix,
+    }:
+      nixpkgsFor.${system}.stdenv.mkDerivation {
+        pname = "clay";
+        version = "${version}${suffix}";
+        inherit src;
+
+        dontBuild = true;
+
+        postInstall = ''
+          mkdir -p $out/include
+          mkdir -p $out/lib/pkgconfig
+
+          cp clay.h $out/include
+
+          cat <<EOF >$out/lib/pkgconfig/clay.pc
+          prefix=$out
+          includedir=$out/include
+          Name: Clay
+          Description: Clay (short for C Layout) is a high performance 2D UI layout library.
+          Version: ${version}
+          Cflags: -I$out/include
+          EOF
+        '';
+
+        passthru.tests.pkg-config = nixpkgs.lib.testing.testMetaPkgConfig self.packages.${system}.${version};
+
+        meta = with lib; {
+          description = "Clay (short for C Layout) is a high performance 2D UI layout library.";
+          homepage = "https://github.com/nicbarker/clay";
+          license = licenses.zlib;
+          maintainers = with maintainers; [nicbarker];
+          pkgConfigModules = ["clay"];
+          platforms = platforms.all;
+        };
+      };
   in {
     checks = forAllSystems (
       system: let
@@ -26,6 +79,8 @@
               statix
             ];
           } ''
+            cd ${self}
+
             echo "Checking nix formatting"
             alejandra --check .
 
@@ -34,6 +89,8 @@
 
             echo "Checking statix"
             statix check .
+
+            touch $out
           '';
       }
     );
@@ -101,64 +158,31 @@
 
     formatter = forAllSystems (system: nixpkgsFor.${system}.alejandra);
 
-    packages = forAllSystems (
-      system: let
+    packages = forAllSystems (system: let
       pkgs = nixpkgsFor.${system};
-        git_tag
-        date = let
-          # YYYYMMDD
-          date' = lib.substring 0 8 self.lastModifiedDate;
-          year = lib.substring 0 4 date';
-          month = lib.substring 4 2 date';
-          date = lib.substring 6 2 date';
-        in
-          if (self ? "lastModifiedDate")
-          then
-            lib.concatStringsSep "-" [
-              year
-              month
-              date
-            ]
-          else "unknown";
+      inherit (pkgs) fetchFromGitHub;
     in {
-        default = pkgs.stdenv.mkDerivation (finalAttrs {
-          pname = "clay";
-          version = "v0.14-master-${date}";
-          src = ./.;
-
-          dontBuild = true;
-
-          installPhase = ''
-            mkdir -p $out/include
-            mkdir -p $out/lib/pkgconfig
-
-            cp clay.h $out/include
-
-            cat <<EOF >$out/lib/pkgconfig/clay.pc
-            prefix=$out
-            includedir=$out/include
-            Name: Clay
-            Description: Clay (short for C Layout) is a high performance 2D UI layout library.
-            Version: $version
-            Cflags: -I$out/include
-            EOF
-          '';
-
-          passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
-
-          meta = with lib; {
-            description = "Clay (short for C Layout) is a high performance 2D UI layout library.";
-            homepage = "https://github.com/nicbarker/clay";
-            license = licenses.zlib;
-            maintainers = with maintainers; [nicbarker];
-            pkgConfigModules = ["clay"];
-            # FIXME: I'm not sure what platforms this supports.
-            platforms = platforms.all;
+      stable = mkClayPackage {
+        inherit system;
+        version = "0.14";
+        # To update this use nurl https://github.com/nicbarker/clay {tag}
+        src = fetchFromGitHub {
+          owner = "nicbarker";
+          repo = "clay";
+          rev = "v0.14"; # This will need to be updated when a new version is released
+          hash = "sha256-6h1aQXqwzPc4oPuid3RfV7W0WzQFUiddjW7OtkKM0P8="; # This too likely
+        };
+        suffix = "";
       };
-        });
 
-        defaultPackage = self.packages.${system}.default;
-      }
-    );
+      unstable = mkClayPackage {
+        inherit system;
+        version = "0.14";
+        src = ./.;
+        suffix = "-master-${date}";
+      };
+
+      default = self.packages.${system}.stable;
+    });
   };
 }