534 lines
20 KiB
Python
534 lines
20 KiB
Python
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# commit.py
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# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
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#
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# This module is part of GitPython and is released under
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# the BSD License: http://www.opensource.org/licenses/bsd-license.php
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from gitdb import IStream
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from git.util import (
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hex_to_bin,
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Actor,
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Iterable,
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Stats,
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finalize_process
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)
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from git.diff import Diffable
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from .tree import Tree
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from . import base
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from .util import (
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Traversable,
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Serializable,
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parse_date,
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altz_to_utctz_str,
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parse_actor_and_date,
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from_timestamp,
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)
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from git.compat import text_type
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from time import (
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time,
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daylight,
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altzone,
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timezone,
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localtime
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)
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import os
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from io import BytesIO
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import logging
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log = logging.getLogger('git.objects.commit')
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log.addHandler(logging.NullHandler())
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__all__ = ('Commit', )
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class Commit(base.Object, Iterable, Diffable, Traversable, Serializable):
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"""Wraps a git Commit object.
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This class will act lazily on some of its attributes and will query the
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value on demand only if it involves calling the git binary."""
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# ENVIRONMENT VARIABLES
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# read when creating new commits
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env_author_date = "GIT_AUTHOR_DATE"
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env_committer_date = "GIT_COMMITTER_DATE"
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# CONFIGURATION KEYS
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conf_encoding = 'i18n.commitencoding'
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# INVARIANTS
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default_encoding = "UTF-8"
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# object configuration
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type = "commit"
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__slots__ = ("tree",
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"author", "authored_date", "author_tz_offset",
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"committer", "committed_date", "committer_tz_offset",
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"message", "parents", "encoding", "gpgsig")
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_id_attribute_ = "hexsha"
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def __init__(self, repo, binsha, tree=None, author=None, authored_date=None, author_tz_offset=None,
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committer=None, committed_date=None, committer_tz_offset=None,
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message=None, parents=None, encoding=None, gpgsig=None):
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"""Instantiate a new Commit. All keyword arguments taking None as default will
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be implicitly set on first query.
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:param binsha: 20 byte sha1
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:param parents: tuple( Commit, ... )
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is a tuple of commit ids or actual Commits
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:param tree: Tree
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Tree object
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:param author: Actor
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is the author Actor object
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:param authored_date: int_seconds_since_epoch
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is the authored DateTime - use time.gmtime() to convert it into a
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different format
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:param author_tz_offset: int_seconds_west_of_utc
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is the timezone that the authored_date is in
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:param committer: Actor
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is the committer string
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:param committed_date: int_seconds_since_epoch
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is the committed DateTime - use time.gmtime() to convert it into a
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different format
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:param committer_tz_offset: int_seconds_west_of_utc
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is the timezone that the committed_date is in
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:param message: string
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is the commit message
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:param encoding: string
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encoding of the message, defaults to UTF-8
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:param parents:
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List or tuple of Commit objects which are our parent(s) in the commit
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dependency graph
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:return: git.Commit
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:note:
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Timezone information is in the same format and in the same sign
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as what time.altzone returns. The sign is inverted compared to git's
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UTC timezone."""
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super(Commit, self).__init__(repo, binsha)
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if tree is not None:
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assert isinstance(tree, Tree), "Tree needs to be a Tree instance, was %s" % type(tree)
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if tree is not None:
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self.tree = tree
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if author is not None:
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self.author = author
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if authored_date is not None:
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self.authored_date = authored_date
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if author_tz_offset is not None:
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self.author_tz_offset = author_tz_offset
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if committer is not None:
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self.committer = committer
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if committed_date is not None:
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self.committed_date = committed_date
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if committer_tz_offset is not None:
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self.committer_tz_offset = committer_tz_offset
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if message is not None:
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self.message = message
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if parents is not None:
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self.parents = parents
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if encoding is not None:
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self.encoding = encoding
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if gpgsig is not None:
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self.gpgsig = gpgsig
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@classmethod
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def _get_intermediate_items(cls, commit):
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return commit.parents
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def _set_cache_(self, attr):
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if attr in Commit.__slots__:
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# read the data in a chunk, its faster - then provide a file wrapper
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_binsha, _typename, self.size, stream = self.repo.odb.stream(self.binsha)
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self._deserialize(BytesIO(stream.read()))
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else:
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super(Commit, self)._set_cache_(attr)
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# END handle attrs
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@property
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def authored_datetime(self):
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return from_timestamp(self.authored_date, self.author_tz_offset)
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@property
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def committed_datetime(self):
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return from_timestamp(self.committed_date, self.committer_tz_offset)
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@property
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def summary(self):
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""":return: First line of the commit message"""
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return self.message.split('\n', 1)[0]
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def count(self, paths='', **kwargs):
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"""Count the number of commits reachable from this commit
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:param paths:
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is an optional path or a list of paths restricting the return value
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to commits actually containing the paths
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:param kwargs:
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Additional options to be passed to git-rev-list. They must not alter
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the output style of the command, or parsing will yield incorrect results
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:return: int defining the number of reachable commits"""
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# yes, it makes a difference whether empty paths are given or not in our case
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# as the empty paths version will ignore merge commits for some reason.
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if paths:
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return len(self.repo.git.rev_list(self.hexsha, '--', paths, **kwargs).splitlines())
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return len(self.repo.git.rev_list(self.hexsha, **kwargs).splitlines())
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@property
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def name_rev(self):
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"""
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:return:
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String describing the commits hex sha based on the closest Reference.
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Mostly useful for UI purposes"""
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return self.repo.git.name_rev(self)
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@classmethod
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def iter_items(cls, repo, rev, paths='', **kwargs):
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"""Find all commits matching the given criteria.
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:param repo: is the Repo
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:param rev: revision specifier, see git-rev-parse for viable options
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:param paths:
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is an optional path or list of paths, if set only Commits that include the path
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or paths will be considered
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:param kwargs:
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optional keyword arguments to git rev-list where
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``max_count`` is the maximum number of commits to fetch
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``skip`` is the number of commits to skip
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``since`` all commits since i.e. '1970-01-01'
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:return: iterator yielding Commit items"""
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if 'pretty' in kwargs:
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raise ValueError("--pretty cannot be used as parsing expects single sha's only")
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# END handle pretty
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# use -- in any case, to prevent possibility of ambiguous arguments
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# see https://github.com/gitpython-developers/GitPython/issues/264
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args = ['--']
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if paths:
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args.extend((paths, ))
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# END if paths
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proc = repo.git.rev_list(rev, args, as_process=True, **kwargs)
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return cls._iter_from_process_or_stream(repo, proc)
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def iter_parents(self, paths='', **kwargs):
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"""Iterate _all_ parents of this commit.
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:param paths:
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Optional path or list of paths limiting the Commits to those that
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contain at least one of the paths
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:param kwargs: All arguments allowed by git-rev-list
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:return: Iterator yielding Commit objects which are parents of self """
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# skip ourselves
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skip = kwargs.get("skip", 1)
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if skip == 0: # skip ourselves
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skip = 1
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kwargs['skip'] = skip
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return self.iter_items(self.repo, self, paths, **kwargs)
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@property
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def stats(self):
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"""Create a git stat from changes between this commit and its first parent
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or from all changes done if this is the very first commit.
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:return: git.Stats"""
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if not self.parents:
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text = self.repo.git.diff_tree(self.hexsha, '--', numstat=True, root=True)
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text2 = ""
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for line in text.splitlines()[1:]:
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(insertions, deletions, filename) = line.split("\t")
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text2 += "%s\t%s\t%s\n" % (insertions, deletions, filename)
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text = text2
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else:
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text = self.repo.git.diff(self.parents[0].hexsha, self.hexsha, '--', numstat=True)
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return Stats._list_from_string(self.repo, text)
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@classmethod
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def _iter_from_process_or_stream(cls, repo, proc_or_stream):
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"""Parse out commit information into a list of Commit objects
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We expect one-line per commit, and parse the actual commit information directly
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from our lighting fast object database
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:param proc: git-rev-list process instance - one sha per line
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:return: iterator returning Commit objects"""
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stream = proc_or_stream
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if not hasattr(stream, 'readline'):
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stream = proc_or_stream.stdout
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readline = stream.readline
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while True:
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line = readline()
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if not line:
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break
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hexsha = line.strip()
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if len(hexsha) > 40:
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# split additional information, as returned by bisect for instance
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hexsha, _ = line.split(None, 1)
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# END handle extra info
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assert len(hexsha) == 40, "Invalid line: %s" % hexsha
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yield Commit(repo, hex_to_bin(hexsha))
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# END for each line in stream
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# TODO: Review this - it seems process handling got a bit out of control
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# due to many developers trying to fix the open file handles issue
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if hasattr(proc_or_stream, 'wait'):
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finalize_process(proc_or_stream)
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@classmethod
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def create_from_tree(cls, repo, tree, message, parent_commits=None, head=False, author=None, committer=None,
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author_date=None, commit_date=None):
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"""Commit the given tree, creating a commit object.
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:param repo: Repo object the commit should be part of
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:param tree: Tree object or hex or bin sha
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the tree of the new commit
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:param message: Commit message. It may be an empty string if no message is provided.
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It will be converted to a string in any case.
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:param parent_commits:
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Optional Commit objects to use as parents for the new commit.
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If empty list, the commit will have no parents at all and become
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a root commit.
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If None , the current head commit will be the parent of the
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new commit object
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:param head:
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If True, the HEAD will be advanced to the new commit automatically.
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Else the HEAD will remain pointing on the previous commit. This could
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lead to undesired results when diffing files.
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:param author: The name of the author, optional. If unset, the repository
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configuration is used to obtain this value.
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:param committer: The name of the committer, optional. If unset, the
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repository configuration is used to obtain this value.
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:param author_date: The timestamp for the author field
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:param commit_date: The timestamp for the committer field
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:return: Commit object representing the new commit
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:note:
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Additional information about the committer and Author are taken from the
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environment or from the git configuration, see git-commit-tree for
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more information"""
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if parent_commits is None:
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try:
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parent_commits = [repo.head.commit]
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except ValueError:
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# empty repositories have no head commit
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parent_commits = []
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# END handle parent commits
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else:
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for p in parent_commits:
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if not isinstance(p, cls):
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raise ValueError("Parent commit '%r' must be of type %s" % (p, cls))
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# end check parent commit types
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# END if parent commits are unset
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# retrieve all additional information, create a commit object, and
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# serialize it
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# Generally:
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# * Environment variables override configuration values
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# * Sensible defaults are set according to the git documentation
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# COMMITER AND AUTHOR INFO
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cr = repo.config_reader()
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env = os.environ
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committer = committer or Actor.committer(cr)
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author = author or Actor.author(cr)
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# PARSE THE DATES
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unix_time = int(time())
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is_dst = daylight and localtime().tm_isdst > 0
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offset = altzone if is_dst else timezone
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author_date_str = env.get(cls.env_author_date, '')
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if author_date:
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author_time, author_offset = parse_date(author_date)
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elif author_date_str:
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author_time, author_offset = parse_date(author_date_str)
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else:
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author_time, author_offset = unix_time, offset
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# END set author time
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committer_date_str = env.get(cls.env_committer_date, '')
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if commit_date:
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committer_time, committer_offset = parse_date(commit_date)
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elif committer_date_str:
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committer_time, committer_offset = parse_date(committer_date_str)
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else:
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committer_time, committer_offset = unix_time, offset
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# END set committer time
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# assume utf8 encoding
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enc_section, enc_option = cls.conf_encoding.split('.')
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conf_encoding = cr.get_value(enc_section, enc_option, cls.default_encoding)
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# if the tree is no object, make sure we create one - otherwise
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# the created commit object is invalid
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if isinstance(tree, str):
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tree = repo.tree(tree)
|
||
|
|
# END tree conversion
|
||
|
|
|
||
|
|
# CREATE NEW COMMIT
|
||
|
|
new_commit = cls(repo, cls.NULL_BIN_SHA, tree,
|
||
|
|
author, author_time, author_offset,
|
||
|
|
committer, committer_time, committer_offset,
|
||
|
|
message, parent_commits, conf_encoding)
|
||
|
|
|
||
|
|
stream = BytesIO()
|
||
|
|
new_commit._serialize(stream)
|
||
|
|
streamlen = stream.tell()
|
||
|
|
stream.seek(0)
|
||
|
|
|
||
|
|
istream = repo.odb.store(IStream(cls.type, streamlen, stream))
|
||
|
|
new_commit.binsha = istream.binsha
|
||
|
|
|
||
|
|
if head:
|
||
|
|
# need late import here, importing git at the very beginning throws
|
||
|
|
# as well ...
|
||
|
|
import git.refs
|
||
|
|
try:
|
||
|
|
repo.head.set_commit(new_commit, logmsg=message)
|
||
|
|
except ValueError:
|
||
|
|
# head is not yet set to the ref our HEAD points to
|
||
|
|
# Happens on first commit
|
||
|
|
master = git.refs.Head.create(repo, repo.head.ref, new_commit, logmsg="commit (initial): %s" % message)
|
||
|
|
repo.head.set_reference(master, logmsg='commit: Switching to %s' % master)
|
||
|
|
# END handle empty repositories
|
||
|
|
# END advance head handling
|
||
|
|
|
||
|
|
return new_commit
|
||
|
|
|
||
|
|
#{ Serializable Implementation
|
||
|
|
|
||
|
|
def _serialize(self, stream):
|
||
|
|
write = stream.write
|
||
|
|
write(("tree %s\n" % self.tree).encode('ascii'))
|
||
|
|
for p in self.parents:
|
||
|
|
write(("parent %s\n" % p).encode('ascii'))
|
||
|
|
|
||
|
|
a = self.author
|
||
|
|
aname = a.name
|
||
|
|
c = self.committer
|
||
|
|
fmt = "%s %s <%s> %s %s\n"
|
||
|
|
write((fmt % ("author", aname, a.email,
|
||
|
|
self.authored_date,
|
||
|
|
altz_to_utctz_str(self.author_tz_offset))).encode(self.encoding))
|
||
|
|
|
||
|
|
# encode committer
|
||
|
|
aname = c.name
|
||
|
|
write((fmt % ("committer", aname, c.email,
|
||
|
|
self.committed_date,
|
||
|
|
altz_to_utctz_str(self.committer_tz_offset))).encode(self.encoding))
|
||
|
|
|
||
|
|
if self.encoding != self.default_encoding:
|
||
|
|
write(("encoding %s\n" % self.encoding).encode('ascii'))
|
||
|
|
|
||
|
|
try:
|
||
|
|
if self.__getattribute__('gpgsig') is not None:
|
||
|
|
write(b"gpgsig")
|
||
|
|
for sigline in self.gpgsig.rstrip("\n").split("\n"):
|
||
|
|
write((" " + sigline + "\n").encode('ascii'))
|
||
|
|
except AttributeError:
|
||
|
|
pass
|
||
|
|
|
||
|
|
write(b"\n")
|
||
|
|
|
||
|
|
# write plain bytes, be sure its encoded according to our encoding
|
||
|
|
if isinstance(self.message, text_type):
|
||
|
|
write(self.message.encode(self.encoding))
|
||
|
|
else:
|
||
|
|
write(self.message)
|
||
|
|
# END handle encoding
|
||
|
|
return self
|
||
|
|
|
||
|
|
def _deserialize(self, stream):
|
||
|
|
""":param from_rev_list: if true, the stream format is coming from the rev-list command
|
||
|
|
Otherwise it is assumed to be a plain data stream from our object"""
|
||
|
|
readline = stream.readline
|
||
|
|
self.tree = Tree(self.repo, hex_to_bin(readline().split()[1]), Tree.tree_id << 12, '')
|
||
|
|
|
||
|
|
self.parents = []
|
||
|
|
next_line = None
|
||
|
|
while True:
|
||
|
|
parent_line = readline()
|
||
|
|
if not parent_line.startswith(b'parent'):
|
||
|
|
next_line = parent_line
|
||
|
|
break
|
||
|
|
# END abort reading parents
|
||
|
|
self.parents.append(type(self)(self.repo, hex_to_bin(parent_line.split()[-1].decode('ascii'))))
|
||
|
|
# END for each parent line
|
||
|
|
self.parents = tuple(self.parents)
|
||
|
|
|
||
|
|
# we don't know actual author encoding before we have parsed it, so keep the lines around
|
||
|
|
author_line = next_line
|
||
|
|
committer_line = readline()
|
||
|
|
|
||
|
|
# we might run into one or more mergetag blocks, skip those for now
|
||
|
|
next_line = readline()
|
||
|
|
while next_line.startswith(b'mergetag '):
|
||
|
|
next_line = readline()
|
||
|
|
while next_line.startswith(b' '):
|
||
|
|
next_line = readline()
|
||
|
|
# end skip mergetags
|
||
|
|
|
||
|
|
# now we can have the encoding line, or an empty line followed by the optional
|
||
|
|
# message.
|
||
|
|
self.encoding = self.default_encoding
|
||
|
|
self.gpgsig = None
|
||
|
|
|
||
|
|
# read headers
|
||
|
|
enc = next_line
|
||
|
|
buf = enc.strip()
|
||
|
|
while buf:
|
||
|
|
if buf[0:10] == b"encoding ":
|
||
|
|
self.encoding = buf[buf.find(' ') + 1:].decode(
|
||
|
|
self.encoding, 'ignore')
|
||
|
|
elif buf[0:7] == b"gpgsig ":
|
||
|
|
sig = buf[buf.find(b' ') + 1:] + b"\n"
|
||
|
|
is_next_header = False
|
||
|
|
while True:
|
||
|
|
sigbuf = readline()
|
||
|
|
if not sigbuf:
|
||
|
|
break
|
||
|
|
if sigbuf[0:1] != b" ":
|
||
|
|
buf = sigbuf.strip()
|
||
|
|
is_next_header = True
|
||
|
|
break
|
||
|
|
sig += sigbuf[1:]
|
||
|
|
# end read all signature
|
||
|
|
self.gpgsig = sig.rstrip(b"\n").decode(self.encoding, 'ignore')
|
||
|
|
if is_next_header:
|
||
|
|
continue
|
||
|
|
buf = readline().strip()
|
||
|
|
# decode the authors name
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.author, self.authored_date, self.author_tz_offset = \
|
||
|
|
parse_actor_and_date(author_line.decode(self.encoding, 'replace'))
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
log.error("Failed to decode author line '%s' using encoding %s", author_line, self.encoding,
|
||
|
|
exc_info=True)
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.committer, self.committed_date, self.committer_tz_offset = \
|
||
|
|
parse_actor_and_date(committer_line.decode(self.encoding, 'replace'))
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
log.error("Failed to decode committer line '%s' using encoding %s", committer_line, self.encoding,
|
||
|
|
exc_info=True)
|
||
|
|
# END handle author's encoding
|
||
|
|
|
||
|
|
# a stream from our data simply gives us the plain message
|
||
|
|
# The end of our message stream is marked with a newline that we strip
|
||
|
|
self.message = stream.read()
|
||
|
|
try:
|
||
|
|
self.message = self.message.decode(self.encoding, 'replace')
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
log.error("Failed to decode message '%s' using encoding %s", self.message, self.encoding, exc_info=True)
|
||
|
|
# END exception handling
|
||
|
|
|
||
|
|
return self
|
||
|
|
|
||
|
|
#} END serializable implementation
|