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),

testing/resources/exclude_types_repo/.pre-commit-hooks.yaml

@@ -0,0 +1,6 @@
+-   id: python-files
+    name: Python files
+    entry: bin/hook.sh
+    language: script
+    types: [python]
+    exclude_types: [python3]

testing/resources/exclude_types_repo/bin/hook.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+echo $@
+exit 1

tests/commands/run_test.py

@@ -20,6 +20,7 @@ from pre_commit.commands.run import run
 from pre_commit.runner import Runner
 from pre_commit.util import cmd_output
 from pre_commit.util import cwd
+from pre_commit.util import make_executable
 from testing.auto_namedtuple import auto_namedtuple
 from testing.fixtures import add_config_to_repo
 from testing.fixtures import make_consuming_repo
@@ -43,7 +44,7 @@ def repo_with_failing_hook(tempdir_factory):
 
 
 def stage_a_file(filename='foo.py'):
-    cmd_output('touch', filename)
+    open(filename, 'a').close()
     cmd_output('git', 'add', filename)
 
 
@@ -166,6 +167,22 @@ def test_types_hook_repository(
         assert b'bar.notpy' not in printed
 
 
+def test_exclude_types_hook_repository(
+        cap_out, tempdir_factory, mock_out_store_directory,
+):
+    git_path = make_consuming_repo(tempdir_factory, 'exclude_types_repo')
+    with cwd(git_path):
+        with io.open('exe', 'w') as exe:
+            exe.write('#!/usr/bin/env python3\n')
+        make_executable('exe')
+        cmd_output('git', 'add', 'exe')
+        stage_a_file('bar.py')
+        ret, printed = _do_run(cap_out, git_path, _get_opts())
+        assert ret == 1
+        assert b'bar.py' in printed
+        assert b'exe' not in printed
+
+
 def test_show_diff_on_failure(
         capfd, cap_out, tempdir_factory, mock_out_store_directory,
 ):

tests/manifest_test.py

@@ -35,6 +35,7 @@ def test_manifest_contents(manifest):
         'pass_filenames': True,
         'stages': [],
         'types': ['file'],
+        'exclude_types': [],
     }]
 
 
@@ -56,6 +57,7 @@ def test_hooks(manifest):
         'pass_filenames': True,
         'stages': [],
         'types': ['file'],
+        'exclude_types': [],
     }