forked from coala/coala-bears
/
GitCommitBear.py
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/
GitCommitBear.py
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import nltk
import re
import shutil
import os
from urllib.parse import urlparse
from coalib.bears.GlobalBear import GlobalBear
from coalib.bears.requirements.PipRequirement import PipRequirement
from coala_utils.ContextManagers import change_directory
from coalib.misc.Shell import run_shell_command
from coalib.results.Result import Result
from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY
from coalib.settings.FunctionMetadata import FunctionMetadata
from coalib.settings.Setting import typed_list
class GitCommitBear(GlobalBear):
LANGUAGES = {'Git'}
REQUIREMENTS = {PipRequirement('nltk', '3.1')}
AUTHORS = {'The coala developers'}
AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
LICENSE = 'AGPL-3.0'
ASCIINEMA_URL = 'https://asciinema.org/a/e146c9739ojhr8396wedsvf0d'
CAN_DETECT = {'Formatting'}
@classmethod
def check_prerequisites(cls):
if shutil.which('git') is None:
return 'git is not installed.'
else:
return True
@classmethod
def get_shortlog_checks_metadata(cls):
return FunctionMetadata.from_function(
cls.check_shortlog,
omit={'self', 'shortlog'})
@classmethod
def get_body_checks_metadata(cls):
return FunctionMetadata.from_function(
cls.check_body,
omit={'self', 'body'})
@classmethod
def get_metadata(cls):
return FunctionMetadata.merge(
FunctionMetadata.from_function(
cls.run,
omit={'self', 'dependency_results'}),
cls.get_shortlog_checks_metadata(),
cls.get_body_checks_metadata())
def run(self, allow_empty_commit_message: bool = False, **kwargs):
"""
Check the current git commit message at HEAD.
This bear ensures automatically that the shortlog and body do not
exceed a given line-length and that a newline lies between them.
:param allow_empty_commit_message: Whether empty commit messages are
allowed or not.
"""
with change_directory(self.get_config_dir() or os.getcwd()):
stdout, stderr = run_shell_command('git log -1 --pretty=%B')
if stderr:
self.err('git:', repr(stderr))
return
stdout = stdout.rstrip('\n').splitlines()
if len(stdout) == 0:
if not allow_empty_commit_message:
yield Result(self, 'HEAD commit has no message.')
return
yield from self.check_shortlog(
stdout[0],
**self.get_shortlog_checks_metadata().filter_parameters(kwargs))
yield from self.check_body(
stdout[1:],
**self.get_body_checks_metadata().filter_parameters(kwargs))
def check_shortlog(self, shortlog,
shortlog_length: int=50,
shortlog_regex: str='',
shortlog_trailing_period: bool=None,
shortlog_imperative_check: bool=True,
shortlog_wip_check: bool=True):
"""
Checks the given shortlog.
:param shortlog: The shortlog message string.
:param shortlog_length: The maximum length of the shortlog.
The newline character at end does not
count to the length.
:param regex: A regex to check the shortlog with.
:param shortlog_trailing_period: Whether a dot shall be enforced at end
end or not (or ``None`` for "don't
care").
:param shortlog_wip_check: Whether a "WIP" in the shortlog text
should yield a result or not.
"""
diff = len(shortlog) - shortlog_length
if diff > 0:
yield Result(self,
'Shortlog of the HEAD commit contains {} '
'character(s). This is {} character(s) longer than '
'the limit ({} > {}).'.format(
len(shortlog), diff,
len(shortlog), shortlog_length))
if (shortlog[-1] != '.') == shortlog_trailing_period:
yield Result(self,
'Shortlog of HEAD commit contains no period at end.'
if shortlog_trailing_period else
'Shortlog of HEAD commit contains a period at end.')
if shortlog_regex:
match = re.fullmatch(shortlog_regex, shortlog)
if not match:
yield Result(
self,
'Shortlog of HEAD commit does not match given regex:'
' {regex}'.format(regex=shortlog_regex))
if shortlog_imperative_check:
colon_pos = shortlog.find(':')
shortlog = (shortlog[colon_pos + 1:]
if colon_pos != -1
else shortlog)
has_flaws = self.check_imperative(shortlog)
if has_flaws:
bad_word = has_flaws[0]
yield Result(self,
"Shortlog of HEAD commit isn't in imperative "
"mood! Bad words are '{}'".format(bad_word))
if shortlog_wip_check:
if 'wip' in shortlog.lower()[:4]:
yield Result(
self,
'This commit seems to be marked as work in progress and '
'should not be used in production. Treat carefully.')
def check_imperative(self, paragraph):
"""
Check the given sentence/s for Imperatives.
:param paragraph:
The input paragraph to be tested.
:return:
A list of tuples having 2 elements (invalid word, parts of speech)
or an empty list if no invalid words are found.
"""
try:
words = nltk.word_tokenize(nltk.sent_tokenize(paragraph)[0])
# VBZ : Verb, 3rd person singular present, like 'adds', 'writes'
# etc
# VBD : Verb, Past tense , like 'added', 'wrote' etc
# VBG : Verb, Present participle, like 'adding', 'writing'
word, tag = nltk.pos_tag(['I'] + words)[1:2][0]
if(tag.startswith('VBZ') or
tag.startswith('VBD') or
tag.startswith('VBG') or
word.endswith('ing')): # Handle special case for VBG
return (word, tag)
else:
return None
except LookupError as error: # pragma: no cover
self.err('NLTK data missing, install by running following '
'commands `python3 -m nltk.downloader punkt'
' maxent_treebank_pos_tagger averaged_perceptron_tagger`')
return
def check_body(self, body,
body_line_length: int=72,
force_body: bool=False,
vcs_used: str='',
contains_url: bool=False,
ignore_length_regex: typed_list(str)=()):
"""
Checks the given commit body.
:param body: The commit body splitted by lines.
:param body_line_length: The maximum line-length of the body. The
newline character at each line end does not
count to the length.
:param vcs_used: The version control system used.
:param contains_url: Whether the body contains a issue related
URL or not.
:param force_body: Whether a body shall exist or not.
:param ignore_length_regex: Lines matching each of the regular
expressions in this list will be ignored.
"""
if len(body) == 0:
if force_body:
yield Result(self, 'No commit message body at HEAD.')
return
if body[0] != '':
yield Result(self, 'No newline found between shortlog and body at '
'HEAD commit. Please add one.')
return
if contains_url:
urls = re.findall(r'(https?://\S+)', body)
has_good_url = False
for url in urls:
pieces = urlparse(url)
netloc = pieces.netloc
scheme = pieces.scheme
path = pieces.path
try:
assert all([scheme, netloc, path])
if netloc.find(vcs_used) != -1 and path.find('issues'):
has_good_url = True
except AssertionError:
pass
if not has_good_url:
yield Result(self, 'No issue related URL found in '
'the body at HEAD commit. '
'Please add one.')
return
ignore_regexes = [re.compile(regex) for regex in ignore_length_regex]
if any((len(line) > body_line_length and
not any(regex.search(line) for regex in ignore_regexes))
for line in body[1:]):
yield Result(self, 'Body of HEAD commit contains too long lines. '
'Commit body lines should not exceed {} '
'characters.'.format(body_line_length))