feat(hook order): add before, after options to specify hooks order

Author: sinrohit

modules/hook.nix

@@ -135,15 +135,6 @@ in
       default = true;
     };
 
-    priority = mkOption {
-      type = types.number;
-      description = ''
-        Defines the priority order in which hooks are executed.
-        Lower the number, the higher the precedence.
-      '';
-      default = 0;
-    };
-
     fail_fast = mkOption {
       type = types.bool;
       description = ''
@@ -193,12 +184,31 @@ in
         '';
       default = [ ];
     };
+
+    before = mkOption {
+      type = types.listOf types.str;
+      description =
+        ''
+          List of hooks that should run after this hook.
+        '';
+      default = [ ];
+    };
+
+    after = mkOption {
+      type = types.listOf types.str;
+      description =
+        ''
+          List of hooks that should run before this hook.
+        '';
+      default = [ ];
+    };
+
   };
 
   config = {
     raw =
       {
-        inherit (config) name entry language files types types_or exclude_types pass_filenames priority fail_fast require_serial stages verbose always_run args;
+        inherit (config) name entry language files types types_or exclude_types pass_filenames fail_fast require_serial stages verbose always_run args before after;
         id = config.name;
         exclude = mergeExcludes config.excludes;
       };

modules/pre-commit.nix

@@ -31,20 +31,20 @@ let
   enabledExtraPackages = builtins.concatLists (mapAttrsToList (_: value: value.extraPackages) enabledHooks);
   processedHooks =
     let
-      # Sort the list of hooks by priority (lower number = higher priority)
-      sortedHooks = builtins.sort
-        (a: b: a.priority < b.priority)
+      sortedHooks = lib.toposort
+        (a: b: builtins.elem b.id a.before || builtins.elem a.id b.after)
         (mapAttrsToList
           (id: value:
             value.raw // {
               inherit id;
-              priority = value.raw.priority;
+              before = value.raw.before;
+              after = value.raw.after;
             }
           )
           enabledHooks
         );
     in
-    sortedHooks;
+    sortedHooks.result;
 
   configFile =
     performAssertions (