From de8ccbdc89a9a344a5821b252f66fb3cb1c9ec39 Mon Sep 17 00:00:00 2001
From: toastal <toastal@posteo.net>
Date: Wed, 15 May 2024 23:10:16 +0700
Subject: [PATCH 1/2] flake: remove flake-utils dependency

---
 flake.lock | 34 ----------------------------------
 flake.nix  | 39 ++++++++++++++++++++-------------------
 2 files changed, 20 insertions(+), 53 deletions(-)

diff --git a/flake.lock b/flake.lock
index b15f9485..eb6da9a3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -16,24 +16,6 @@
         "type": "github"
       }
     },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "gitignore": {
       "inputs": {
         "nixpkgs": [
@@ -89,26 +71,10 @@
     "root": {
       "inputs": {
         "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
         "gitignore": "gitignore",
         "nixpkgs": "nixpkgs",
         "nixpkgs-stable": "nixpkgs-stable"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index c937ea24..220277dc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,6 @@
 
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
   inputs.nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-23.11";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
   inputs.flake-compat = {
     url = "github:edolstra/flake-compat";
     flake = false;
@@ -13,7 +12,7 @@
     inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = { self, nixpkgs, flake-utils, gitignore, nixpkgs-stable, ... }:
+  outputs = { self, nixpkgs, gitignore, nixpkgs-stable, ... }:
     let
       lib = nixpkgs.lib;
       defaultSystems = [
@@ -22,6 +21,12 @@
         "x86_64-darwin"
         "x86_64-linux"
       ];
+      depsFor = lib.genAttrs defaultSystems (system: {
+        pkgs = nixpkgs.legacyPackages.${system};
+        exposed = import ./nix { inherit nixpkgs system; gitignore-nix-src = gitignore; isFlakes = true; };
+        exposed-stable = import ./nix { nixpkgs = nixpkgs-stable; inherit system; gitignore-nix-src = gitignore; isFlakes = true; };
+      });
+      forAllSystems = fn: lib.genAttrs defaultSystems (system: fn depsFor.${system});
     in
     {
       flakeModule = ./flake-module.nix;
@@ -32,27 +37,23 @@
           A template with flake-parts and nixpkgs-fmt.
         '';
       };
-    }
-    // flake-utils.lib.eachSystem defaultSystems (system:
-      let
-        exposed = import ./nix { inherit nixpkgs system; gitignore-nix-src = gitignore; isFlakes = true; };
-        exposed-stable = import ./nix { nixpkgs = nixpkgs-stable; inherit system; gitignore-nix-src = gitignore; isFlakes = true; };
-      in
-      {
-        packages = exposed.packages // {
-          default = exposed.packages.pre-commit;
-        };
 
-        devShells.default = nixpkgs.legacyPackages.${system}.mkShell {
+      packages = forAllSystems ({ exposed, ... }: exposed.packages // {
+        default = exposed.packages.pre-commit;
+      });
+
+      devShells = forAllSystems ({ pkgs, exposed, ... }: {
+        default = pkgs.mkShellNoCC {
           inherit (exposed.checks.pre-commit-check) shellHook;
         };
+      });
 
-        checks = lib.filterAttrs (k: v: v != null)
+      checks = forAllSystems ({ exposed, exposed-stable, ... }:
+        lib.filterAttrs (k: v: v != null)
           (exposed.checks
-          // (lib.mapAttrs' (name: value: lib.nameValuePair "stable-${name}" value)
-            exposed-stable.checks));
+            // (lib.mapAttrs' (name: value: lib.nameValuePair "stable-${name}" value)
+            exposed-stable.checks)));
 
-        lib = { inherit (exposed) run; };
-      }
-    );
+      lib = forAllSystems ({ exposed, ... }: { inherit (exposed) run; });
+    };
 }

From 8803a39afa8b3bfc88b7e3646a07450b57f4e27a Mon Sep 17 00:00:00 2001
From: toastal <toastal@posteo.net>
Date: Wed, 15 May 2024 23:11:29 +0700
Subject: [PATCH 2/2] readme: remove flake-utils reference

---
 README.md | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/README.md b/README.md
index e4b66200..8c48c5c9 100644
--- a/README.md
+++ b/README.md
@@ -29,25 +29,30 @@ Given the following `flake.nix` example:
   description = "An example project.";
 
   inputs.pre-commit-hooks.url = "github:cachix/pre-commit-hooks.nix";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
-
-  outputs = { self, nixpkgs, pre-commit-hooks, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
-      {
-        checks = {
-          pre-commit-check = pre-commit-hooks.lib.${system}.run {
-            src = ./.;
-            hooks = {
-              nixpkgs-fmt.enable = true;
-            };
+
+  outputs = { self, nixpkgs, ... }@inputs:
+    let
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    in
+    {
+      checks = forAllSystems (system: {
+        pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
+          src = ./.;
+          hooks = {
+            nixpkgs-fmt.enable = true;
           };
         };
-        devShell = nixpkgs.legacyPackages.${system}.mkShell {
+      });
+
+      devShells = forAllSystems (system: {
+        default = nixpkgs.legacyPackages.${system}.mkShell {
           inherit (self.checks.${system}.pre-commit-check) shellHook;
           buildInputs = self.checks.${system}.pre-commit-check.enabledPackages;
         };
-      }
-    );
+      });
+    };
 }
 ```