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from __future__ import unicode_literals

from pre_commit.clientlib.validate_base import get_run_function

from pre_commit.clientlib.validate_base import get_validator

from pre_commit.clientlib.validate_base import is_regex_valid

from pre_commit.errors import FatalError

_LOCAL_HOOKS_MAGIC_REPO_STRING = 'local'

def is_local_hooks(repo_entry):

return repo_entry['repo'] == _LOCAL_HOOKS_MAGIC_REPO_STRING

class InvalidConfigError(FatalError):

pass

CONFIG_JSON_SCHEMA = {

'type': 'array',

'minItems': 1,

'items': {

'type': 'object',

'properties': {

'repo': {'type': 'string'},

'sha': {'type': 'string'},

'hooks': {

'type': 'array',

'minItems': 1,

'items': {

'type': 'object',

'properties': {

'id': {'type': 'string'},

'files': {'type': 'string'},

'exclude': {'type': 'string'},

'language_version': {'type': 'string'},

'args': {

'type': 'array',

'items': {'type': 'string'},

'required': ['id'],

}

'required': ['repo', 'hooks'],

}

def try_regex(repo, hook, value, field_name):

if not is_regex_valid(value):

raise InvalidConfigError(

'Invalid {0} regex at {1}, {2}: {3}'.format(

field_name, repo, hook, value,

)

def validate_config_extra(config):

for repo in config:

if is_local_hooks(repo):

if 'sha' in repo:

raise InvalidConfigError(

'"sha" property provided for local hooks'

)

elif 'sha' not in repo:

raise InvalidConfigError(

'Missing "sha" field for repository {0}'.format(repo['repo'])

)

for hook in repo['hooks']:

try_regex(repo, hook['id'], hook.get('files', ''), 'files')

try_regex(repo, hook['id'], hook.get('exclude', ''), 'exclude')

load_config = get_validator(

CONFIG_JSON_SCHEMA,

InvalidConfigError,

additional_validation_strategy=validate_config_extra,

)

run = get_run_function('Config filenames.', load_config, InvalidConfigError)

if __name__ == '__main__':

exit(run())

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