Implement default_stages

pre_commit/clientlib.py

@@ -224,6 +224,11 @@ CONFIG_SCHEMA = cfgv.Map(
     cfgv.OptionalRecurse(
         'default_language_version', DEFAULT_LANGUAGE_VERSION, {},
     ),
+    cfgv.Optional(
+        'default_stages',
+        cfgv.check_array(cfgv.check_one_of(C.STAGES)),
+        C.STAGES,
+    ),
     cfgv.Optional('exclude', cfgv.check_regex, '^$'),
     cfgv.Optional('fail_fast', cfgv.check_bool, False),
 )

pre_commit/commands/run.py

@@ -252,7 +252,7 @@ def run(config_file, store, args, environ=os.environ):
             hook
             for hook in all_hooks(config, store)
             if not args.hook or hook.id == args.hook or hook.alias == args.hook
-            if not hook.stages or args.hook_stage in hook.stages
+            if args.hook_stage in hook.stages
         ]
 
         if args.hook and not hooks:

pre_commit/repository.py

@@ -135,6 +135,9 @@ def _hook(*hook_dicts, **kwargs):
     if ret['language_version'] == C.DEFAULT:
         ret['language_version'] = languages[lang].get_default_version()
 
+    if not ret['stages']:
+        ret['stages'] = root_config['default_stages']
+
     return ret