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from __future__ import print_function
from __future__ import unicode_literals
import logging
import os
import sys
from pre_commit import color
from pre_commit import git
from pre_commit.logging_handler import LoggingHandler
from pre_commit.output import get_hook_message
from pre_commit.output import sys_stdout_write_wrapper
from pre_commit.staged_files_only import staged_files_only
from pre_commit.util import cmd_output
from pre_commit.util import noop_context
logger = logging.getLogger('pre_commit')
def _get_skips(environ):
skips = environ.get('SKIP', '')
return set(skip.strip() for skip in skips.split(',') if skip.strip())
def _hook_msg_start(hook, verbose):
return '{0}{1}'.format(
'[{0}] '.format(hook['id']) if verbose else '',
hook['name'],
)
def _print_no_files_skipped(hook, write, args):
write(get_hook_message(
_hook_msg_start(hook, args.verbose),
postfix='(no files to check) ',
end_msg='Skipped',
end_color=color.TURQUOISE,
use_color=args.color,
))
def _print_user_skipped(hook, write, args):
write(get_hook_message(
_hook_msg_start(hook, args.verbose),
end_msg='Skipped',
end_color=color.YELLOW,
use_color=args.color,
))
def get_changed_files(new, old):
return cmd_output(
'git', 'diff', '--name-only', '{0}..{1}'.format(old, new),
)[1].splitlines()
def get_filenames(args, include_expr, exclude_expr):
if args.origin and args.source:
getter = git.get_files_matching(
lambda: get_changed_files(args.origin, args.source),
)
elif args.files:
getter = git.get_files_matching(lambda: args.files)
elif args.all_files:
getter = git.get_all_files_matching
elif git.is_in_merge_conflict():
getter = git.get_conflicted_files_matching
else:
getter = git.get_staged_files_matching
return getter(include_expr, exclude_expr)
def _run_single_hook(hook, repo, args, write, skips=frozenset()):
filenames = get_filenames(args, hook['files'], hook['exclude'])
if hook['id'] in skips:
_print_user_skipped(hook, write, args)
return 0
elif not filenames:
_print_no_files_skipped(hook, write, args)
return 0
# Print the hook and the dots first in case the hook takes hella long to
# run.
write(get_hook_message(_hook_msg_start(hook, args.verbose), end_len=6))
sys.stdout.flush()
diff_before = cmd_output('git', 'diff', retcode=None, encoding=None)
retcode, stdout, stderr = repo.run_hook(hook, filenames)
diff_after = cmd_output('git', 'diff', retcode=None, encoding=None)
file_modifications = diff_before != diff_after
# If the hook makes changes, fail the commit
if file_modifications:
retcode = 1
if retcode:
retcode = 1
print_color = color.RED
pass_fail = 'Failed'
else:
retcode = 0
print_color = color.GREEN
pass_fail = 'Passed'
write(color.format_color(pass_fail, print_color, args.color) + '\n')
if (stdout or stderr or file_modifications) and (retcode or args.verbose):
write('hookid: {0}\n'.format(hook['id']))
write('\n')
# Print a message if failing due to file modifications
if file_modifications:
write('Files were modified by this hook.')
if stdout or stderr:
write(' Additional output:\n')
write('\n')
for output in (stdout, stderr):
assert type(output) is bytes, type(output)
if output.strip():
write(output.strip() + b'\n')
write('\n')
return retcode
def _run_hooks(repo_hooks, args, write, environ):
"""Actually run the hooks."""
skips = _get_skips(environ)
retval = 0
for repo, hook in repo_hooks:
retval |= _run_single_hook(hook, repo, args, write, skips)
return retval
def get_repo_hooks(runner):
for repo in runner.repositories:
for _, hook in repo.hooks:
yield (repo, hook)
def _has_unmerged_paths(runner):
_, stdout, _ = runner.cmd_runner.run(['git', 'ls-files', '--unmerged'])
return bool(stdout.strip())
def _has_unstaged_config(runner):
retcode, _, _ = runner.cmd_runner.run(
('git', 'diff', '--exit-code', runner.config_file_path),
retcode=None,
)
# be explicit, other git errors don't mean it has an unstaged config.
return retcode == 1
def run(runner, args, write=sys_stdout_write_wrapper, environ=os.environ):
no_stash = args.no_stash or args.all_files or bool(args.files)
# Set up our logging handler
logger.addHandler(LoggingHandler(args.color, write=write))
logger.setLevel(logging.INFO)
# Check if we have unresolved merge conflict files and fail fast.
if _has_unmerged_paths(runner):
logger.error('Unmerged files. Resolve before committing.')
return 1
if bool(args.source) != bool(args.origin):
logger.error('Specify both --origin and --source.')
return 1
if _has_unstaged_config(runner) and not no_stash:
if args.allow_unstaged_config:
logger.warn(
'You have an unstaged config file and have specified the '
'--allow-unstaged-config option.\n'
'Note that your config will be stashed before the config is '
'parsed unless --no-stash is specified.',
)
else:
logger.error(
'Your .pre-commit-config.yaml is unstaged.\n'
'`git add .pre-commit-config.yaml` to fix this.\n'
'Run pre-commit with --allow-unstaged-config to silence this.'
)
return 1
if no_stash:
ctx = noop_context()
else:
ctx = staged_files_only(runner.cmd_runner)
with ctx:
repo_hooks = list(get_repo_hooks(runner))
if args.hook:
repo_hooks = [
(repo, hook) for repo, hook in repo_hooks
if hook['id'] == args.hook
]
if not repo_hooks:
write('No hook with id `{0}`\n'.format(args.hook))
return 1
# Filter hooks for stages
repo_hooks = [
(repo, hook) for repo, hook in repo_hooks
if not hook['stages'] or args.hook_stage in hook['stages']
]
return _run_hooks(repo_hooks, args, write, environ)