Implement exclude_types

pre_commit/clientlib.py

@@ -49,7 +49,13 @@ MANIFEST_HOOK_DICT = schema.Map(
         'files', schema.check_and(schema.check_string, schema.check_regex),
         '',
     ),
+    schema.Optional(
+        'exclude',
+        schema.check_and(schema.check_string, schema.check_regex),
+        '^$',
+    ),
     schema.Optional('types', schema.check_array(check_type_tag), ['file']),
+    schema.Optional('exclude_types', schema.check_array(check_type_tag), []),
 
     schema.Optional(
         'additional_dependencies', schema.check_array(schema.check_string), [],
@@ -58,11 +64,6 @@ MANIFEST_HOOK_DICT = schema.Map(
     schema.Optional('always_run', schema.check_bool, False),
     schema.Optional('pass_filenames', schema.check_bool, True),
     schema.Optional('description', schema.check_string, ''),
-    schema.Optional(
-        'exclude',
-        schema.check_and(schema.check_string, schema.check_regex),
-        '^$',
-    ),
     schema.Optional('language_version', schema.check_string, 'default'),
     schema.Optional('log_file', schema.check_string, ''),
     schema.Optional('minimum_pre_commit_version', schema.check_string, '0'),

pre_commit/commands/run.py

@@ -43,12 +43,14 @@ def get_changed_files(new, old):
     )[1].splitlines()
 
 
-def filter_filenames_by_types(filenames, types):
-    types = frozenset(types)
-    return tuple(
-        filename for filename in filenames
-        if tags_from_path(filename) >= types
-    )
+def filter_filenames_by_types(filenames, types, exclude_types):
+    types, exclude_types = frozenset(types), frozenset(exclude_types)
+    ret = []
+    for filename in filenames:
+        tags = tags_from_path(filename)
+        if tags >= types and not tags & exclude_types:
+            ret.append(filename)
+    return tuple(ret)
 
 
 def get_filenames(args, include_expr, exclude_expr):
@@ -73,7 +75,9 @@ NO_FILES = '(no files to check)'
 
 def _run_single_hook(hook, repo, args, skips, cols):
     filenames = get_filenames(args, hook['files'], hook['exclude'])
-    filenames = filter_filenames_by_types(filenames, hook['types'])
+    filenames = filter_filenames_by_types(
+        filenames, hook['types'], hook['exclude_types'],
+    )
     if hook['id'] in skips:
         output.write(get_hook_message(
             _hook_msg_start(hook, args.verbose),