Apply defaults to all of the configs. Much fewer .get()s

pre_commit/clientlib/validate_base.py

@@ -4,6 +4,8 @@ import jsonschema.exceptions
 import os.path
 import yaml
 
+from pre_commit.jsonschema_extensions import apply_defaults
+
 
 def get_validator(
     json_schema,
@@ -39,6 +41,8 @@ def get_validator(
                 'File {0} is not a valid file'.format(filename), e,
             )
 
+        obj = apply_defaults(obj, json_schema)
+
         additional_validation_strategy(obj)
 
         return obj

pre_commit/clientlib/validate_config.py

@@ -28,10 +28,10 @@ CONFIG_JSON_SCHEMA = {
                     'properties': {
                         'id': {'type': 'string'},
                         'files': {'type': 'string'},
-                        'exclude': {'type': 'string'},
+                        'exclude': {'type': 'string', 'default': '^$'},
                         'args': {
                             'type': 'array',
-                            'minItems': 1,
+                            'default': [],
                             'items': {'type': 'string'},
                         },
                     },
@@ -59,7 +59,7 @@ 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('exclude', ''), 'exclude')
+            try_regex(repo, hook['id'], hook['exclude'], 'exclude')
 
 
 load_config = get_validator(

pre_commit/clientlib/validate_manifest.py

@@ -20,10 +20,10 @@ MANIFEST_JSON_SCHEMA = {
         'properties': {
             'id': {'type': 'string'},
             'name': {'type': 'string'},
-            'description': {'type': 'string'},
+            'description': {'type': 'string', 'default': ''},
             'entry': {'type': 'string'},
             'language': {'type': 'string'},
-            'expected_return_value': {'type': 'number'},
+            'expected_return_value': {'type': 'number', 'default': 0},
         },
         'required': ['id', 'name', 'entry', 'language'],
     },
@@ -32,11 +32,9 @@ MANIFEST_JSON_SCHEMA = {
 
 def additional_manifest_check(obj):
     for hook_config in obj:
-        language = hook_config.get('language')
+        language = hook_config['language']
 
-        if language is not None and not any(
+        if not any(language.startswith(lang) for lang in all_languages):
-            language.startswith(lang) for lang in all_languages
-        ):
             raise InvalidManifestError(
                 'Expected language {0} for {1} to start with one of {2!r}'.format(
                     hook_config['id'],

pre_commit/languages/helpers.py

@@ -2,7 +2,7 @@
 
 def run_hook(env, hook, file_args):
     return env.run(
-        ' '.join(['xargs', hook['entry']] + hook.get('args', [])),
+        ' '.join(['xargs', hook['entry']] + hook['args']),
         stdin='\n'.join(list(file_args) + ['']),
         retcode=None,
     )

pre_commit/languages/script.py

@@ -6,7 +6,7 @@ def install_environment(repo_cmd_runner):
 
 def run_hook(repo_cmd_runner, hook, file_args):
     return repo_cmd_runner.run(
-        ['xargs', '{{prefix}}{0}'.format(hook['entry'])] + hook.get('args', []),
+        ['xargs', '{{prefix}}{0}'.format(hook['entry'])] + hook['args'],
         # TODO: this is duplicated in pre_commit/languages/helpers.py
         stdin='\n'.join(list(file_args) + ['']),
         retcode=None,

pre_commit/languages/system.py

@@ -6,7 +6,7 @@ def install_environment(repo_cmd_runner):
 
 def run_hook(repo_cmd_runner, hook, file_args):
     return repo_cmd_runner.run(
-        ['xargs', hook['entry']] + hook.get('args', []),
+        ['xargs', hook['entry']] + hook['args'],
         # TODO: this is duplicated in pre_commit/languages/helpers.py
         stdin='\n'.join(list(file_args) + ['']),
         retcode=None,

pre_commit/repository.py

@@ -27,9 +27,7 @@ class Repository(object):
 
     @cached_property
     def languages(self):
-        return set(filter(None, (
+        return set(hook['language'] for hook in self.hooks.values())
-            hook.get('language') for hook in self.hooks.values()
-        )))
 
     @cached_property
     def hooks(self):

pre_commit/run.py

@@ -38,7 +38,7 @@ def _run_single_hook(runner, repository, hook_id, all_files=False):
         get_filenames(hook['files']),
     )
 
-    if retcode != repository.hooks[hook_id].get('expected_return_value', 0):
+    if retcode != repository.hooks[hook_id]['expected_return_value']:
         output = '\n'.join([stdout, stderr]).strip()
         retcode = 1
         color = RED

tests/clientlib/validate_config_test.py

@@ -7,6 +7,7 @@ from pre_commit.clientlib.validate_config import CONFIG_JSON_SCHEMA
 from pre_commit.clientlib.validate_config import InvalidConfigError
 from pre_commit.clientlib.validate_config import run
 from pre_commit.clientlib.validate_config import validate_config_extra
+from pre_commit.jsonschema_extensions import apply_defaults
 
 
 def test_returns_0_for_valid_config():
@@ -78,28 +79,50 @@ def test_is_valid_according_to_schema(manifest_obj, expected):
 def test_config_with_failing_regexes_fails():
     with pytest.raises(InvalidConfigError):
         # Note the regex '(' is invalid (unbalanced parens)
-        validate_config_extra([{
+        config = apply_defaults(
-            'repo': 'foo', 'hooks': [{'id': 'hook_id', 'files': '('}]
+            [{
-        }])
+                'repo': 'foo',
+                'sha': 'foo',
+                'hooks': [{'id': 'hook_id', 'files': '('}],
+            }],
+            CONFIG_JSON_SCHEMA,
+        )
+        validate_config_extra(config)
 
 
 def test_config_with_ok_regexes_passes():
-    validate_config_extra([{
+    config = apply_defaults(
-        'repo': 'foo', 'hooks': [{'id': 'hook_id', 'files': '\.py$'}],
+        [{
-    }])
+            'repo': 'foo',
+            'sha': 'foo',
+            'hooks': [{'id': 'hook_id', 'files': '\.py$'}],
+        }],
+        CONFIG_JSON_SCHEMA,
+    )
+    validate_config_extra(config)
 
 
 def test_config_with_invalid_exclude_regex_fails():
     with pytest.raises(InvalidConfigError):
-        # NOte the regex '(' is invalid (unbalanced parens)
+        # Note the regex '(' is invalid (unbalanced parens)
-        validate_config_extra([{
+        config = apply_defaults(
-            'repo': 'foo',
+            [{
-            'hooks': [{'id': 'hook_id', 'files': '', 'exclude': '('}],
+                'repo': 'foo',
-        }])
+                'sha': 'foo',
+                'hooks': [{'id': 'hook_id', 'files': '', 'exclude': '('}],
+            }],
+            CONFIG_JSON_SCHEMA,
+        )
+        validate_config_extra(config)
 
 
 def test_config_with_ok_exclude_regex_passes():
-    validate_config_extra([{
+    config = apply_defaults(
-        'repo': 'foo',
+        [{
-        'hooks': [{'id': 'hook_id', 'files': '', 'exclude': '^vendor/'}],
+            'repo': 'foo',
-    }])
+            'sha': 'foo',
+            'hooks': [{'id': 'hook_id', 'files': '', 'exclude': '^vendor/'}],
+        }],
+        CONFIG_JSON_SCHEMA,
+    )
+    validate_config_extra(config)

tests/clientlib/validate_manifest_test.py

@@ -27,11 +27,10 @@ def test_additional_manifest_check_raises_for_bad_language():
 
 
 @pytest.mark.parametrize(('obj'), (
-    [{}],
     [{'language': 'python'}],
     [{'language': 'ruby'}],
 ))
-def test_additional_manifest_check_is_ok_with_missing_language(obj):
+def test_additional_manifest_check_languages(obj):
     additional_manifest_check(obj)
 
 

tests/commands_test.py

@@ -1,5 +1,4 @@
 
-import jsonschema
 import os
 import os.path
 import pkg_resources
@@ -18,6 +17,7 @@ from pre_commit.commands import install
 from pre_commit.commands import RepositoryCannotBeUpdatedError
 from pre_commit.commands import uninstall
 from pre_commit.commands import _update_repository
+from pre_commit.jsonschema_extensions import apply_defaults
 from pre_commit.ordereddict import OrderedDict
 from pre_commit.runner import Runner
 from pre_commit.yaml_extensions import ordered_dump
@@ -60,8 +60,9 @@ def up_to_date_repo(python_hooks_repo):
         ('sha', git.get_head_sha(python_hooks_repo)),
         ('hooks', [OrderedDict((('id', 'foo'), ('files', '')))]),
     ))
-    jsonschema.validate([config], CONFIG_JSON_SCHEMA)
+    wrapped_config = apply_defaults([config], CONFIG_JSON_SCHEMA)
-    validate_config_extra([config])
+    validate_config_extra(wrapped_config)
+    config = wrapped_config[0]
 
     with open(os.path.join(python_hooks_repo, C.CONFIG_FILE), 'w') as file_obj:
         file_obj.write(
@@ -96,8 +97,9 @@ def out_of_date_repo(python_hooks_repo):
         ('sha', git.get_head_sha(python_hooks_repo)),
         ('hooks', [OrderedDict((('id', 'foo'), ('files', '')))]),
     ))
-    jsonschema.validate([config], CONFIG_JSON_SCHEMA)
+    config_wrapped = apply_defaults([config], CONFIG_JSON_SCHEMA)
-    validate_config_extra([config])
+    validate_config_extra(config_wrapped)
+    config = config_wrapped[0]
     local['git']['commit', '--allow-empty', '-m', 'foo']()
     head_sha = git.get_head_sha(python_hooks_repo)
 
@@ -135,8 +137,9 @@ def hook_disappearing_repo(python_hooks_repo):
         ('sha', git.get_head_sha(python_hooks_repo)),
         ('hooks', [OrderedDict((('id', 'foo'), ('files', '')))]),
     ))
-    jsonschema.validate([config], CONFIG_JSON_SCHEMA)
+    config_wrapped = apply_defaults([config], CONFIG_JSON_SCHEMA)
-    validate_config_extra([config])
+    validate_config_extra(config_wrapped)
+    config = config_wrapped[0]
     shutil.copy(get_resource_path('manifest_without_foo.yaml'), C.MANIFEST_FILE)
     local['git']['add', '.']()
     local['git']['commit', '-m', 'Remove foo']()

tests/conftest.py

@@ -1,6 +1,5 @@
 from __future__ import absolute_import
 
-import jsonschema
 import pytest
 import time
 from plumbum import local
@@ -8,6 +7,7 @@ from plumbum import local
 from pre_commit import git
 from pre_commit.clientlib.validate_config import CONFIG_JSON_SCHEMA
 from pre_commit.clientlib.validate_config import validate_config_extra
+from pre_commit.jsonschema_extensions import apply_defaults
 from testing.util import copy_tree_to_path
 from testing.util import get_resource_path
 
@@ -69,9 +69,9 @@ def _make_config(path, hook_id, file_regex):
         'sha': git.get_head_sha(path),
         'hooks': [{'id': hook_id, 'files': file_regex}],
     }
-    jsonschema.validate([config], CONFIG_JSON_SCHEMA)
+    config_wrapped = apply_defaults([config], CONFIG_JSON_SCHEMA)
-    validate_config_extra([config])
+    validate_config_extra(config_wrapped)
-    return config
+    return config_wrapped[0]
 
 
 @pytest.yield_fixture

tests/repository_test.py

@@ -1,11 +1,11 @@
 import os
-import jsonschema
 import pytest
 
 import pre_commit.constants as C
 from pre_commit import git
 from pre_commit.clientlib.validate_config import CONFIG_JSON_SCHEMA
 from pre_commit.clientlib.validate_config import validate_config_extra
+from pre_commit.jsonschema_extensions import apply_defaults
 from pre_commit.prefixed_command_runner import PrefixedCommandRunner
 from pre_commit.repository import Repository
 
@@ -111,9 +111,9 @@ def mock_repo_config():
             'files': '\.py$',
         }],
     }
-    jsonschema.validate([config], CONFIG_JSON_SCHEMA)
+    config_wrapped = apply_defaults([config], CONFIG_JSON_SCHEMA)
-    validate_config_extra([config])
+    validate_config_extra(config_wrapped)
-    return config
+    return config_wrapped[0]
 
 
 def test_repo_url(mock_repo_config):