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# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
__all__= ["Commit"]
fromcollectionsimportdefaultdict
importdatetime
fromioimportBytesIO
importlogging
importos
importre
fromsubprocessimportPopen,PIPE
importsys
fromtimeimportaltzone,daylight,localtime,time,timezone
importwarnings
fromgitdbimportIStream
fromgit.cmdimportGit
fromgit.diffimportDiffable
fromgit.utilimportActor,Stats,finalize_process,hex_to_bin
from .importbase
from .treeimportTree
from .utilimport (
Serializable,
TraversableIterableObj,
altz_to_utctz_str,
from_timestamp,
parse_actor_and_date,
parse_date,
)
# typing ------------------------------------------------------------------
fromtypingimport (
Any,
Dict,
IO,
Iterator,
List,
Sequence,
Tuple,
TYPE_CHECKING,
Union,
cast,
)
ifsys.version_info>= (3,8):
fromtypingimportLiteral
else:
fromtyping_extensionsimportLiteral
fromgit.typesimportPathLike
ifTYPE_CHECKING:
fromgit.refsimportSymbolicReference
fromgit.repoimportRepo
# ------------------------------------------------------------------------
_logger=logging.getLogger(__name__)
classCommit(base.Object,TraversableIterableObj,Diffable,Serializable):
"""Wraps a git commit object.
See :manpage:`gitglossary(7)` on "commit object":
https://git-scm.com/docs/gitglossary#def_commit_object
:note:
This class will act lazily on some of its attributes and will query the value on
demand only if it involves calling the git binary.
"""
# ENVIRONMENT VARIABLES
# Read when creating new commits.
env_author_date="GIT_AUTHOR_DATE"
env_committer_date="GIT_COMMITTER_DATE"
# CONFIGURATION KEYS
conf_encoding="i18n.commitencoding"
# INVARIANTS
default_encoding="UTF-8"
type:Literal["commit"]="commit"
__slots__= (
"tree",
"author",
"authored_date",
"author_tz_offset",
"committer",
"committed_date",
"committer_tz_offset",
"message",
"parents",
"encoding",
"gpgsig",
)
_id_attribute_="hexsha"
parents:Sequence["Commit"]
def__init__(
self,
repo:"Repo",
binsha:bytes,
tree:Union[Tree,None]=None,
author:Union[Actor,None]=None,
authored_date:Union[int,None]=None,
author_tz_offset:Union[None,float]=None,
committer:Union[Actor,None]=None,
committed_date:Union[int,None]=None,
committer_tz_offset:Union[None,float]=None,
message:Union[str,bytes,None]=None,
parents:Union[Sequence["Commit"],None]=None,
encoding:Union[str,None]=None,
gpgsig:Union[str,None]=None,
)->None:
"""Instantiate a new :class:`Commit`. All keyword arguments taking ``None`` as
default will be implicitly set on first query.
:param binsha:
20 byte sha1.
:param tree:
A :class:`~git.objects.tree.Tree` object.
:param author:
The author :class:`~git.util.Actor` object.
:param authored_date: int_seconds_since_epoch
The authored DateTime - use :func:`time.gmtime` to convert it into a
different format.
:param author_tz_offset: int_seconds_west_of_utc
The timezone that the `authored_date` is in.
:param committer:
The committer string, as an :class:`~git.util.Actor` object.
:param committed_date: int_seconds_since_epoch
The committed DateTime - use :func:`time.gmtime` to convert it into a
different format.
:param committer_tz_offset: int_seconds_west_of_utc
The timezone that the `committed_date` is in.
:param message: string
The commit message.
:param encoding: string
Encoding of the message, defaults to UTF-8.
:param parents:
List or tuple of :class:`Commit` objects which are our parent(s) in the
commit dependency graph.
:return:
:class:`Commit`
:note:
Timezone information is in the same format and in the same sign as what
:func:`time.altzone` returns. The sign is inverted compared to git's UTC
timezone.
"""
super().__init__(repo,binsha)
self.binsha=binsha
iftreeisnotNone:
assertisinstance(tree,Tree),"Tree needs to be a Tree instance, was %s"%type(tree)
iftreeisnotNone:
self.tree=tree
ifauthorisnotNone:
self.author=author
ifauthored_dateisnotNone:
self.authored_date=authored_date
ifauthor_tz_offsetisnotNone:
self.author_tz_offset=author_tz_offset
ifcommitterisnotNone:
self.committer=committer
ifcommitted_dateisnotNone:
self.committed_date=committed_date
ifcommitter_tz_offsetisnotNone:
self.committer_tz_offset=committer_tz_offset
ifmessageisnotNone:
self.message=message
ifparentsisnotNone:
self.parents=parents
ifencodingisnotNone:
self.encoding=encoding
ifgpgsigisnotNone:
self.gpgsig=gpgsig
@classmethod
def_get_intermediate_items(cls,commit:"Commit")->Tuple["Commit", ...]:
returntuple(commit.parents)
@classmethod
def_calculate_sha_(cls,repo:"Repo",commit:"Commit")->bytes:
"""Calculate the sha of a commit.
:param repo:
:class:`~git.repo.base.Repo` object the commit should be part of.
:param commit:
:class:`Commit` object for which to generate the sha.
"""
stream=BytesIO()
commit._serialize(stream)
streamlen=stream.tell()
stream.seek(0)
istream=repo.odb.store(IStream(cls.type,streamlen,stream))
returnistream.binsha
defreplace(self,**kwargs:Any)->"Commit":
"""Create new commit object from an existing commit object.
Any values provided as keyword arguments will replace the corresponding
attribute in the new object.
"""
attrs= {k:getattr(self,k)forkinself.__slots__}
forattrnameinkwargs:
ifattrnamenotinself.__slots__:
raiseValueError("invalid attribute name")
attrs.update(kwargs)
new_commit=self.__class__(self.repo,self.NULL_BIN_SHA,**attrs)
new_commit.binsha=self._calculate_sha_(self.repo,new_commit)
returnnew_commit
def_set_cache_(self,attr:str)->None:
ifattrinCommit.__slots__:
# Read the data in a chunk, its faster - then provide a file wrapper.
_binsha,_typename,self.size,stream=self.repo.odb.stream(self.binsha)
self._deserialize(BytesIO(stream.read()))
else:
super()._set_cache_(attr)
# END handle attrs
@property
defauthored_datetime(self)->datetime.datetime:
returnfrom_timestamp(self.authored_date,self.author_tz_offset)
@property
defcommitted_datetime(self)->datetime.datetime:
returnfrom_timestamp(self.committed_date,self.committer_tz_offset)
@property
defsummary(self)->Union[str,bytes]:
""":return: First line of the commit message"""
ifisinstance(self.message,str):
returnself.message.split("\n",1)[0]
else:
returnself.message.split(b"\n",1)[0]
defcount(self,paths:Union[PathLike,Sequence[PathLike]]="",**kwargs:Any)->int:
"""Count the number of commits reachable from this commit.
:param paths:
An optional path or a list of paths restricting the return value to commits
actually containing the paths.
:param kwargs:
Additional options to be passed to :manpage:`git-rev-list(1)`. They must not
alter the output style of the command, or parsing will yield incorrect
results.
:return:
An int defining the number of reachable commits
"""
# Yes, it makes a difference whether empty paths are given or not in our case as
# the empty paths version will ignore merge commits for some reason.
ifpaths:
returnlen(self.repo.git.rev_list(self.hexsha,"--",paths,**kwargs).splitlines())
returnlen(self.repo.git.rev_list(self.hexsha,**kwargs).splitlines())
@property
defname_rev(self)->str:
"""
:return:
String describing the commits hex sha based on the closest
`~git.refs.reference.Reference`.
:note:
Mostly useful for UI purposes.
"""
returnself.repo.git.name_rev(self)
@classmethod
defiter_items(
cls,
repo:"Repo",
rev:Union[str,"Commit","SymbolicReference"],
paths:Union[PathLike,Sequence[PathLike]]="",
**kwargs:Any,
)->Iterator["Commit"]:
R"""Find all commits matching the given criteria.
:param repo:
The :class:`~git.repo.base.Repo`.
:param rev:
Revision specifier. See :manpage:`git-rev-parse(1)` for viable options.
:param paths:
An optional path or list of paths. If set only :class:`Commit`\s that
include the path or paths will be considered.
:param kwargs:
Optional keyword arguments to :manpage:`git-rev-list(1)` where:
* ``max_count`` is the maximum number of commits to fetch.
* ``skip`` is the number of commits to skip.
* ``since`` selects all commits since some date, e.g. ``"1970-01-01"``.
:return:
Iterator yielding :class:`Commit` items.
"""
if"pretty"inkwargs:
raiseValueError("--pretty cannot be used as parsing expects single sha's only")
# END handle pretty
# Use -- in all cases, to prevent possibility of ambiguous arguments.
# See https://github.com/gitpython-developers/GitPython/issues/264.
args_list:List[PathLike]= ["--"]
ifpaths:
paths_tup:Tuple[PathLike, ...]
ifisinstance(paths, (str,os.PathLike)):
paths_tup= (paths,)
else:
paths_tup=tuple(paths)
args_list.extend(paths_tup)
# END if paths
proc=repo.git.rev_list(rev,args_list,as_process=True,**kwargs)
returncls._iter_from_process_or_stream(repo,proc)
defiter_parents(self,paths:Union[PathLike,Sequence[PathLike]]="",**kwargs:Any)->Iterator["Commit"]:
R"""Iterate _all_ parents of this commit.
:param paths:
Optional path or list of paths limiting the :class:`Commit`\s to those that
contain at least one of the paths.
:param kwargs:
All arguments allowed by :manpage:`git-rev-list(1)`.
:return:
Iterator yielding :class:`Commit` objects which are parents of ``self``
"""
# skip ourselves
skip=kwargs.get("skip",1)
ifskip==0:# skip ourselves
skip=1
kwargs["skip"]=skip
returnself.iter_items(self.repo,self,paths,**kwargs)
@property
defstats(self)->Stats:
"""Create a git stat from changes between this commit and its first parent
or from all changes done if this is the very first commit.
:return:
:class:`Stats`
"""
ifnotself.parents:
text=self.repo.git.diff_tree(self.hexsha,"--",numstat=True,no_renames=True,root=True)
text2=""
forlineintext.splitlines()[1:]:
(insertions,deletions,filename)=line.split("\t")
text2+="%s\t%s\t%s\n"% (insertions,deletions,filename)
text=text2
else:
text=self.repo.git.diff(self.parents[0].hexsha,self.hexsha,"--",numstat=True,no_renames=True)
returnStats._list_from_string(self.repo,text)
@property
deftrailers(self)->Dict[str,str]:
"""Deprecated. Get the trailers of the message as a dictionary.
:note:
This property is deprecated, please use either :attr:`trailers_list` or
:attr:`trailers_dict`.
:return:
Dictionary containing whitespace stripped trailer information.
Only contains the latest instance of each trailer key.
"""
warnings.warn(
"Commit.trailers is deprecated, use Commit.trailers_list or Commit.trailers_dict instead",
DeprecationWarning,
stacklevel=2,
)
return {k:v[0]fork,vinself.trailers_dict.items()}
@property
deftrailers_list(self)->List[Tuple[str,str]]:
"""Get the trailers of the message as a list.
Git messages can contain trailer information that are similar to :rfc:`822`
e-mail headers. See :manpage:`git-interpret-trailers(1)`.
This function calls ``git interpret-trailers --parse`` onto the message to
extract the trailer information, returns the raw trailer data as a list.
Valid message with trailer::
Subject line
some body information
another information
key1: value1.1
key1: value1.2
key2 : value 2 with inner spaces
Returned list will look like this::
[
("key1", "value1.1"),
("key1", "value1.2"),
("key2", "value 2 with inner spaces"),
]
:return:
List containing key-value tuples of whitespace stripped trailer information.
"""
cmd= ["git","interpret-trailers","--parse"]
proc:Git.AutoInterrupt=self.repo.git.execute(# type: ignore[call-overload]
cmd,
as_process=True,
istream=PIPE,
)
trailer:str=proc.communicate(str(self.message).encode())[0].decode("utf8")
trailer=trailer.strip()
ifnottrailer:
return []
trailer_list= []
fortintrailer.split("\n"):
key,val=t.split(":",1)
trailer_list.append((key.strip(),val.strip()))
returntrailer_list
@property
deftrailers_dict(self)->Dict[str,List[str]]:
"""Get the trailers of the message as a dictionary.
Git messages can contain trailer information that are similar to :rfc:`822`
e-mail headers. See :manpage:`git-interpret-trailers(1)`.
This function calls ``git interpret-trailers --parse`` onto the message to
extract the trailer information. The key value pairs are stripped of leading and
trailing whitespaces before they get saved into a dictionary.
Valid message with trailer::
Subject line
some body information
another information
key1: value1.1
key1: value1.2
key2 : value 2 with inner spaces
Returned dictionary will look like this::
{
"key1": ["value1.1", "value1.2"],
"key2": ["value 2 with inner spaces"],
}
:return:
Dictionary containing whitespace stripped trailer information, mapping
trailer keys to a list of their corresponding values.
"""
d=defaultdict(list)
forkey,valinself.trailers_list:
d[key].append(val)
returndict(d)
@classmethod
def_iter_from_process_or_stream(cls,repo:"Repo",proc_or_stream:Union[Popen,IO])->Iterator["Commit"]:
"""Parse out commit information into a list of :class:`Commit` objects.
We expect one line per commit, and parse the actual commit information directly
from our lighting fast object database.
:param proc:
:manpage:`git-rev-list(1)` process instance - one sha per line.
:return:
Iterator supplying :class:`Commit` objects
"""
# def is_proc(inp) -> TypeGuard[Popen]:
# return hasattr(proc_or_stream, 'wait') and not hasattr(proc_or_stream, 'readline')
# def is_stream(inp) -> TypeGuard[IO]:
# return hasattr(proc_or_stream, 'readline')
ifhasattr(proc_or_stream,"wait"):
proc_or_stream=cast(Popen,proc_or_stream)
ifproc_or_stream.stdoutisnotNone:
stream=proc_or_stream.stdout
elifhasattr(proc_or_stream,"readline"):
proc_or_stream=cast(IO,proc_or_stream)# type: ignore[redundant-cast]
stream=proc_or_stream
readline=stream.readline
whileTrue:
line=readline()
ifnotline:
break
hexsha=line.strip()
iflen(hexsha)>40:
# Split additional information, as returned by bisect for instance.
hexsha,_=line.split(None,1)
# END handle extra info
assertlen(hexsha)==40,"Invalid line: %s"%hexsha
yieldcls(repo,hex_to_bin(hexsha))
# END for each line in stream
# TODO: Review this - it seems process handling got a bit out of control due to
# many developers trying to fix the open file handles issue.
ifhasattr(proc_or_stream,"wait"):
proc_or_stream=cast(Popen,proc_or_stream)
finalize_process(proc_or_stream)
@classmethod
defcreate_from_tree(
cls,
repo:"Repo",
tree:Union[Tree,str],
message:str,
parent_commits:Union[None,List["Commit"]]=None,
head:bool=False,
author:Union[None,Actor]=None,
committer:Union[None,Actor]=None,
author_date:Union[None,str,datetime.datetime]=None,
commit_date:Union[None,str,datetime.datetime]=None,
)->"Commit":
"""Commit the given tree, creating a :class:`Commit` object.
:param repo:
:class:`~git.repo.base.Repo` object the commit should be part of.
:param tree:
:class:`~git.objects.tree.Tree` object or hex or bin sha.
The tree of the new commit.
:param message:
Commit message. It may be an empty string if no message is provided. It will
be converted to a string, in any case.
:param parent_commits:
Optional :class:`Commit` objects to use as parents for the new commit. If
empty list, the commit will have no parents at all and become a root commit.
If ``None``, the current head commit will be the parent of the new commit
object.
:param head:
If ``True``, the HEAD will be advanced to the new commit automatically.
Otherwise the HEAD will remain pointing on the previous commit. This could
lead to undesired results when diffing files.
:param author:
The name of the author, optional.
If unset, the repository configuration is used to obtain this value.
:param committer:
The name of the committer, optional.
If unset, the repository configuration is used to obtain this value.
:param author_date:
The timestamp for the author field.
:param commit_date:
The timestamp for the committer field.
:return:
:class:`Commit` object representing the new commit.
:note:
Additional information about the committer and author are taken from the
environment or from the git configuration. See :manpage:`git-commit-tree(1)`
for more information.
"""
ifparent_commitsisNone:
try:
parent_commits= [repo.head.commit]
exceptValueError:
# Empty repositories have no head commit.
parent_commits= []
# END handle parent commits
else:
forpinparent_commits:
ifnotisinstance(p,cls):
raiseValueError(f"Parent commit '{p!r}' must be of type{cls}")
# END check parent commit types
# END if parent commits are unset
# Retrieve all additional information, create a commit object, and serialize it.
# Generally:
# * Environment variables override configuration values.
# * Sensible defaults are set according to the git documentation.
# COMMITTER AND AUTHOR INFO
cr=repo.config_reader()
env=os.environ
committer=committerorActor.committer(cr)
author=authororActor.author(cr)
# PARSE THE DATES
unix_time=int(time())
is_dst=daylightandlocaltime().tm_isdst>0
offset=altzoneifis_dstelsetimezone
author_date_str=env.get(cls.env_author_date,"")
ifauthor_date:
author_time,author_offset=parse_date(author_date)
elifauthor_date_str:
author_time,author_offset=parse_date(author_date_str)
else:
author_time,author_offset=unix_time,offset
# END set author time
committer_date_str=env.get(cls.env_committer_date,"")
ifcommit_date:
committer_time,committer_offset=parse_date(commit_date)
elifcommitter_date_str:
committer_time,committer_offset=parse_date(committer_date_str)
else:
committer_time,committer_offset=unix_time,offset
# END set committer time
# Assume UTF-8 encoding.
enc_section,enc_option=cls.conf_encoding.split(".")
conf_encoding=cr.get_value(enc_section,enc_option,cls.default_encoding)
ifnotisinstance(conf_encoding,str):
raiseTypeError("conf_encoding could not be coerced to str")
# If the tree is no object, make sure we create one - otherwise the created
# commit object is invalid.
ifisinstance(tree,str):
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,
)
new_commit.binsha=cls._calculate_sha_(repo,new_commit)
ifhead:
# Need late import here, importing git at the very beginning throws as
# well...
importgit.refs
try:
repo.head.set_commit(new_commit,logmsg=message)
exceptValueError:
# 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
returnnew_commit
# { Serializable Implementation
def_serialize(self,stream:BytesIO)->"Commit":
write=stream.write
write(("tree %s\n"%self.tree).encode("ascii"))
forpinself.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)
)
ifself.encoding!=self.default_encoding:
write(("encoding %s\n"%self.encoding).encode("ascii"))
try:
ifself.__getattribute__("gpgsig"):
write(b"gpgsig")
forsiglineinself.gpgsig.rstrip("\n").split("\n"):
write((" "+sigline+"\n").encode("ascii"))
exceptAttributeError:
pass
write(b"\n")
# Write plain bytes, be sure its encoded according to our encoding.
ifisinstance(self.message,str):
write(self.message.encode(self.encoding))
else:
write(self.message)
# END handle encoding
returnself
def_deserialize(self,stream:BytesIO)->"Commit":
readline=stream.readline
self.tree=Tree(self.repo,hex_to_bin(readline().split()[1]),Tree.tree_id<<12,"")
self.parents= []
next_line=None
whileTrue:
parent_line=readline()
ifnotparent_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()
whilenext_line.startswith(b"mergetag "):
next_line=readline()
whilenext_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=""
# Read headers.
enc=next_line
buf=enc.strip()
whilebuf:
ifbuf[0:10]==b"encoding ":
self.encoding=buf[buf.find(b" ")+1 :].decode(self.encoding,"ignore")
elifbuf[0:7]==b"gpgsig ":
sig=buf[buf.find(b" ")+1 :]+b"\n"
is_next_header=False
whileTrue:
sigbuf=readline()
ifnotsigbuf:
break
ifsigbuf[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")
ifis_next_header:
continue
buf=readline().strip()
# Decode the author's name.
try:
(
self.author,
self.authored_date,
self.author_tz_offset,
)=parse_actor_and_date(author_line.decode(self.encoding,"replace"))
exceptUnicodeDecodeError:
_logger.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"))
exceptUnicodeDecodeError:
_logger.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")
exceptUnicodeDecodeError:
_logger.error(
"Failed to decode message '%s' using encoding %s",
self.message,
self.encoding,
exc_info=True,
)
# END exception handling
returnself
# } END serializable implementation
@property
defco_authors(self)->List[Actor]:
"""Search the commit message for any co-authors of this commit.
Details on co-authors:
https://github.blog/2018-01-29-commit-together-with-co-authors/
:return:
List of co-authors for this commit (as :class:`~git.util.Actor` objects).
"""
co_authors= []
ifself.message:
results=re.findall(
r"^Co-authored-by: (.*) <(.*?)>$",
self.message,
re.MULTILINE,
)
forauthorinresults:
co_authors.append(Actor(*author))
returnco_authors