Add pre-commit hooks for formatting and dead code

.gitignore

@@ -5,3 +5,4 @@ tmp/
 *.iso
 result
 .proxmox
+.pre-commit-config.yaml

flake.lock

@@ -54,7 +54,7 @@
     },
     "disko_2": {
       "inputs": {
-        "nixpkgs": "nixpkgs_5"
+        "nixpkgs": "nixpkgs_6"
       },
       "locked": {
         "lastModified": 1727347829,
@@ -166,6 +166,22 @@
         "type": "github"
       }
     },
+    "flake-compat_4": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
@@ -264,6 +280,48 @@
         "type": "github"
       }
     },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "gitignore": "gitignore",
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
+      "locked": {
+        "lastModified": 1730814269,
+        "narHash": "sha256-fWPHyhYE6xvMI1eGY3pwBTq85wcy1YXqdzTZF+06nOg=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "d70155fdc00df4628446352fc58adc640cd705c2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "git-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
     "libgit2": {
       "flake": false,
       "locked": {
@@ -330,7 +388,7 @@
     },
     "nix": {
       "inputs": {
-        "flake-compat": "flake-compat",
+        "flake-compat": "flake-compat_2",
         "flake-parts": "flake-parts_3",
         "libgit2": "libgit2",
         "nixpkgs": [
@@ -412,7 +470,7 @@
     },
     "nix_2": {
       "inputs": {
-        "flake-compat": "flake-compat_3",
+        "flake-compat": "flake-compat_4",
         "flake-parts": "flake-parts_5",
         "libgit2": "libgit2_2",
         "nixpkgs": [
@@ -443,7 +501,7 @@
         "flake-parts": "flake-parts_2",
         "nix": "nix",
         "nix-cargo-integration": "nix-cargo-integration",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_3"
       },
       "locked": {
         "lastModified": 1729771744,
@@ -464,7 +522,7 @@
         "flake-parts": "flake-parts_4",
         "nix": "nix_2",
         "nix-cargo-integration": "nix-cargo-integration_2",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_4"
       },
       "locked": {
         "lastModified": 1727424043,
@@ -612,18 +670,34 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1724819573,
+        "lastModified": 1730741070,
-        "narHash": "sha256-GnR7/ibgIH1vhoy8cYdmXE6iyZqKqFxQSVkFgosBh6w=",
+        "narHash": "sha256-edm8WG19kWozJ/GqyYx2VjW99EdhjKwbY3ZwdlPAAlo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "71e91c409d1e654808b2621f28a327acfdad8dc2",
+        "rev": "d063c1dd113c91ab27959ba540c0d9753409edf3",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1730958623,
+        "narHash": "sha256-JwQZIGSYnRNOgDDoIgqKITrPVil+RMWHsZH1eE1VGN0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "85f7e662eda4fa3a995556527c87b2524b691933",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -645,6 +719,22 @@
       }
     },
     "nixpkgs_4": {
+      "locked": {
+        "lastModified": 1724819573,
+        "narHash": "sha256-GnR7/ibgIH1vhoy8cYdmXE6iyZqKqFxQSVkFgosBh6w=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "71e91c409d1e654808b2621f28a327acfdad8dc2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_5": {
       "locked": {
         "lastModified": 1727672256,
         "narHash": "sha256-9/79hjQc9+xyH+QxeMcRsA6hDyw6Z9Eo1/oxjvwirLk=",
@@ -660,7 +750,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_5": {
+    "nixpkgs_6": {
       "locked": {
         "lastModified": 1725194671,
         "narHash": "sha256-tLGCFEFTB5TaOKkpfw3iYT9dnk4awTP/q4w+ROpMfuw=",
@@ -676,7 +766,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_6": {
+    "nixpkgs_7": {
       "locked": {
         "lastModified": 1730137230,
         "narHash": "sha256-0kW6v0alzWIc/Dc/DoVZ7A9qNScv77bj/zYTKI67HZM=",
@@ -825,7 +915,7 @@
     },
     "purescript-overlay": {
       "inputs": {
-        "flake-compat": "flake-compat_2",
+        "flake-compat": "flake-compat_3",
         "nixpkgs": [
           "nixops4",
           "nix-cargo-integration",
@@ -910,9 +1000,10 @@
       "inputs": {
         "disko": "disko",
         "flake-parts": "flake-parts",
+        "git-hooks": "git-hooks",
         "nixops4": "nixops4",
         "nixops4-nixos": "nixops4-nixos",
-        "nixpkgs": "nixpkgs_4",
+        "nixpkgs": "nixpkgs_5",
         "snf": "snf"
       }
     },
@@ -999,7 +1090,7 @@
     "snf": {
       "inputs": {
         "disko": "disko_2",
-        "nixpkgs": "nixpkgs_6",
+        "nixpkgs": "nixpkgs_7",
         "nixpkgs-latest": "nixpkgs-latest",
         "pixelfed": "pixelfed"
       },

flake.nix

@@ -2,6 +2,7 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
     flake-parts.url = "github:hercules-ci/flake-parts";
+    git-hooks.url = "github:cachix/git-hooks.nix";
 
     # snf.url = "path:/home/niols/git/fediversity/simple-nixos-fediverse"; #dev
     snf.url = "git+https://git.fediversity.eu/fediversity/simple-nixos-fediverse.git";
@@ -21,7 +22,10 @@
     }:
     flake-parts.lib.mkFlake { inherit inputs; } {
 
-      imports = [ inputs.nixops4-nixos.modules.flake.default ];
+      imports = [
+        inputs.nixops4-nixos.modules.flake.default
+        inputs.git-hooks.flakeModule
+      ];
 
       systems = [
         "x86_64-linux"
@@ -42,7 +46,15 @@
         {
           formatter = pkgs.nixfmt-rfc-style;
 
-          devShells.default = pkgs.mkShell { packages = [ inputs'.nixops4.packages.default ]; };
+          pre-commit.settings.hooks = {
+            nixfmt-rfc-style.enable = true;
+            deadnix.enable = true;
+          };
+
+          devShells.default = pkgs.mkShell {
+            packages = [ inputs'.nixops4.packages.default ];
+            shellHook = config.pre-commit.installationScript;
+          };
         };
 
       flake.vmIdTo03d =