Tweak rust template

flake.nix

@@ -310,7 +310,11 @@
       templates = {
         rust = {
           description = "A rust flake template based on flake.parts";
-          welcomeText = "Run `cargo init` to start a new project";
+          welcomeText = ''
+            welcome to a new rust project ミ(・・)ミ
+
+            run `direnv allow` and `cargo init` to start a new project
+          '';
           path = ./templates/rust;
         };
       };

templates/rust/.gitignore

@@ -0,0 +1,4 @@
+/.direnv
+/result
+/target
+/.pre-commit-config.yaml

templates/rust/flake.nix

@@ -7,40 +7,39 @@
     crane.url = "github:ipetkov/crane";
     crane.inputs.nixpkgs.follows = "nixpkgs";
     pre-commit.url = "github:cachix/pre-commit-hooks.nix";
+    pre-commit.inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = { self, flake-parts, ... }:
+  outputs = { self, flake-parts, crane, pre-commit, ... }:
     flake-parts.lib.mkFlake { inherit self; } {
+      imports = [ pre-commit.flakeModule ];
       systems = [
         "aarch64-darwin"
         "aarch64-linux"
         "x86_64-darwin"
         "x86_64-linux"
       ];
-      perSystem = { self', inputs', pkgs, ... }:
+      perSystem = { config, pkgs, system, ... }:
         let
-          inherit (inputs') crane pre-commit;
-          crane-lib = crane.lib;
+          crane-lib = crane.lib.${system};
           package = crane-lib.buildPackage {
             src = crane-lib.cleanCargoSource ./.;
             nativeBuildInputs = [ pkgs.libiconv ];
           };
         in
         {
-          checks = {
-            inherit package;
-            pre-commit = pre-commit.lib.run {
-              src = ./.;
-              hooks = {
-                rustfmt.enable = true;
-                clippy.enable = true;
-                cargo-check.enable = true;
-              };
-            };
+          pre-commit.settings.hooks = {
+            rustfmt.enable = true;
+            clippy.enable = true;
+            cargo-check.enable = true;
           };
+          checks = { inherit package; };
           packages.default = package;
           devShells.default = pkgs.mkShell {
-            inherit (self'.checks.pre-commit) shellHook;
+            shellHook = ''
+              ${config.pre-commit.installationScript}
+              echo "welcome to your rust project ミ(・・)ミ" 1>&2
+            '';
             inputsFrom = builtins.attrValues self.checks;
 
             RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";