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py-licenser/pylicenser/vcs/git.py
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git.py
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""" git.py: Backend for GIT"""
__author__ = "Guillaume Anciaux and Nicolas Richart"
__credits__ = [
"Guillaume Anciaux <guillaume.anciaux@epfl.ch>",
"Nicolas Richart <nicolas.richart@epfl.ch>",
]
__copyright__ = "Copyright (©) 2010-2021 EPFL (Ecole Polytechnique Fédérale" \
" de Lausanne) Laboratory (LSMS - Laboratoire de Simulation" \
" en Mécanique des Solides)"
__license__ = "GPLv3"
__version__ = "2.0"
import git
import binascii
import datetime as dt
import re
import os
from .. import export
from .. import version_info
@export
class GITInfo(version_info.VersionInfo):
"""
git implementation of the version info class
"""
__repo = None
__other_names = []
def __init__(self, repo, filename,
authors_ignore_list=[], commits_ignore_list=[],
rev_to=None, **kwargs):
super().__init__(repo, filename, authors_ignore_list, **kwargs)
self.__repo = git.Repo(self._repo)
if self._repo[-1] != os.path.sep:
self._repo = self._repo + os.path.sep
self._name = filename.replace(self._repo, '')
self._commits_ignore_list = commits_ignore_list
commits = self._list_commits(rev_to=rev_to)
self._modification_dates = []
for c in commits:
self._modification_dates.append(
dt.datetime.fromtimestamp(c.authored_date))
self.__other_names = self._list_names(commits)
# noinspection PyIncorrectDocstring
def populate(self, author_db, rev_from=None, rev_to=None):
"""
populate the internal variables
"""
_commits = self._list_commits(rev_to=rev_to, rev_from=rev_from)
def get_modifications(self, revision):
hexsha = binascii.unhexlify(revision)
commit = git.objects.commit.Commit(self.__repo, hexsha)
stats = commit.stats.total
patches = []
subproject_meta = re.compile(
r'[-+]Subproject commit [0-9a-z]+$')
header_modif = re.compile(
r'''[-+] * ((@|__)author(__)?|brief|__license__|''' +
r'''__credits__|@date|(C|__c)opyright\s+\(©\)) ''')
if len(commit.parents) > 1: # merge commit
print('Skipping merge commit')
return '\n'.join(patches), stats
for parent in commit.parents:
diffs = parent.diff(
commit, create_patch=True,
ignore_space_change=True, paths=[self.__other_names])
patch = [
d.diff.decode('utf-8', errors="surrogateescape") for d in diffs
]
if len(patch) > 0 and not re.match(
subproject_meta,
str(patch)) and not re.match(header_modif, str(patch)):
patches.extend(patch)
return '\n'.join(patches), stats
def _list_commits(self, rev_to=None, rev_from=None):
_args = {'follow': True,
'exclude': 'features/*',
'all': True,
'no-merges': True,
'pretty': 'tformat:%H'}
if rev_from is not None:
_args['since'] = rev_from.strftime("%Y-%m-%d")
if rev_to is not None:
_args['until'] = rev_to.strftime("%Y-%m-%d")
# git log can follow better renames in case there where badly done
# (add/rm instead of mv)
git_cmd = git.cmd.Git(working_dir=self.__repo.working_dir)
str_c = git_cmd.log(self._name, **_args)
if len(str_c) != 0:
binhashes = (binascii.unhexlify(c) for c in str_c.split('\n'))
else:
binhashes = []
list_commits = []
sha_list = []
for b in binhashes:
c = git.objects.commit.Commit(self.__repo, b)
if c.hexsha in sha_list:
continue
list_commits.append(c)
sha_list.append(c.hexsha)
return list(set(list_commits))
def _list_names(self, commits):
"""
Finds all the names of a given file
"""
names = [self._name]
for commit in commits:
for parent in commit.parents:
diffs = commit.diff(parent, R=True,
find_renames=True,
ignore_space_change=True,
ignore_all_space=True,
ignore_blank_lines=True
)
for diff in diffs.iter_change_type('R'):
if diff.renamed and diff.rename_to in names:
new_path = diff.rename_from
self._names[new_path] = commit.hexsha
names.append(new_path)
if len(self._names.keys()) == 0:
commit = commits[-1]
self._names[self._name] = commit.hexsha
names.reverse()
return names
@property
def oldest_name(self):
return self.__other_names[0]
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