Make hooks specify files. Optionally allow config to override manifest.

pre_commit/clientlib/validate_config.py

@@ -32,7 +32,7 @@ CONFIG_JSON_SCHEMA = {
                             'items': {'type': 'string'},
                         },
                     },
-                    'required': ['id', 'files'],
+                    'required': ['id'],
                 }
             }
         },
@@ -55,7 +55,7 @@ def try_regex(repo, hook, value, field_name):
 def validate_config_extra(config):
     for repo in config:
         for hook in repo['hooks']:
-            try_regex(repo, hook['id'], hook['files'], 'files')
+            try_regex(repo, hook['id'], hook.get('files', ''), 'files')
             try_regex(repo, hook['id'], hook['exclude'], 'exclude')
 
 

pre_commit/clientlib/validate_manifest.py

@@ -21,9 +21,10 @@ MANIFEST_JSON_SCHEMA = {
             'entry': {'type': 'string'},
             'language': {'type': 'string'},
             'language_version': {'type': 'string', 'default': 'default'},
+            'files': {'type': 'string'},
             'expected_return_value': {'type': 'number', 'default': 0},
         },
-        'required': ['id', 'name', 'entry', 'language'],
+        'required': ['id', 'name', 'entry', 'language', 'files'],
     },
 }
 

pre_commit/repository.py

@@ -38,7 +38,7 @@ class Repository(object):
     def hooks(self):
         # TODO: merging in manifest dicts is a smell imo
         return OrderedDict(
-            (hook['id'], dict(hook, **self.manifest.hooks[hook['id']]))
+            (hook['id'], dict(self.manifest.hooks[hook['id']], **hook))
             for hook in self.repo_config['hooks']
         )