config(*.nix): Configure pre-commit to be used in the repo

Author: MartinNikov

.gitignore

@@ -13,3 +13,6 @@ matrix-*.json
 shardMatrix.json
 
 .vscode
+
+# Pre Commit
+.pre-commit-config.yaml

checks/default.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  inputs,
   ...
 }:
 {
@@ -28,6 +29,8 @@
             nix-fast-build
             ;
           inherit (self'.legacyPackages.inputs.ethereum-nix) foundry;
+
+          pre-commit-check = import ./pre-commit.nix { inherit inputs system; };
         }
         // optionalAttrs (system == "x86_64-linux" || system == "aarch64-darwin") {
           inherit (self'.legacyPackages.inputs.ethereum-nix) geth;

checks/pre-commit.nix

@@ -0,0 +1,7 @@
+{ inputs, system, ... }:
+inputs.pre-commit-hooks.lib.${system}.run {
+  src = ../.;
+  hooks = {
+    nixfmt-rfc-style.enable = true;
+  };
+}

flake.nix

@@ -246,14 +246,22 @@
           system,
           pkgs,
           inputs',
+          self',
           ...
         }:
         {
           _module.args.pkgs = import nixpkgs {
             inherit system;
             config.allowUnfree = true;
           };
-          devShells.default = import ./shells/default.nix { inherit pkgs flake inputs'; };
+          devShells.default = import ./shells/default.nix {
+            inherit
+              pkgs
+              flake
+              inputs'
+              self'
+              ;
+          };
           devShells.ci = import ./shells/ci.nix { inherit pkgs; };
         };
       flake.lib.create =

shells/default.nix

@@ -1,6 +1,6 @@
 {
+  self',
   pkgs,
-  flake,
   inputs',
   ...
 }:
@@ -27,10 +27,13 @@ pkgs.mkShell {
     inputs'.dlang-nix.packages.dmd
     inputs'.dlang-nix.packages.dub
     act
+    self'.checks.pre-commit-check.enabledPackages
   ];
 
-  shellHook = ''
-    export REPO_ROOT="$PWD"
-    figlet -t "${flake.description}"
-  '';
+  shellHook =
+    ''
+      export REPO_ROOT="$PWD"
+      figlet -t "Metacraft Nixos Modules"
+    ''
+    + self'.checks.pre-commit-check.shellHook;
 }