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# remote.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
# Module implementing a remote object allowing easy access to git remotes
from exc import GitCommandError
from ConfigParser import NoOptionError
from config import SectionConstraint
from git.util import (
LazyMixin,
Iterable,
IterableList,
RemoteProgress
)
from refs import (
Reference,
RemoteReference,
SymbolicReference,
TagReference
)
from git.util import (
join_path,
finalize_process
)
from gitdb.util import join
import re
import os
import sys
__all__ = ('RemoteProgress', 'PushInfo', 'FetchInfo', 'Remote')
#{ Utilities
def digest_process_messages(fh, progress):
"""Read progress messages from file-like object fh, supplying the respective
progress messages to the progress instance.
:param fh: File handle to read from
:return: list(line, ...) list of lines without linebreaks that did
not contain progress information"""
line_so_far = ''
dropped_lines = list()
while True:
char = fh.read(1)
if not char:
break
if char in ('\r', '\n') and line_so_far:
dropped_lines.extend(progress._parse_progress_line(line_so_far))
line_so_far = ''
else:
line_so_far += char
# END process parsed line
# END while file is not done reading
return dropped_lines
def add_progress(kwargs, git, progress):
"""Add the --progress flag to the given kwargs dict if supported by the
git command. If the actual progress in the given progress instance is not
given, we do not request any progress
:return: possibly altered kwargs"""
if progress is not None:
v = git.version_info
if v[0] > 1 or v[1] > 7 or v[2] > 0 or v[3] > 3:
kwargs['progress'] = True
#END handle --progress
#END handle progress
return kwargs
#} END utilities
class PushInfo(object):
"""
Carries information about the result of a push operation of a single head::
info = remote.push()[0]
info.flags # bitflags providing more information about the result
info.local_ref # Reference pointing to the local reference that was pushed
# It is None if the ref was deleted.
info.remote_ref_string # path to the remote reference located on the remote side
info.remote_ref # Remote Reference on the local side corresponding to
# the remote_ref_string. It can be a TagReference as well.
info.old_commit # commit at which the remote_ref was standing before we pushed
# it to local_ref.commit. Will be None if an error was indicated
info.summary # summary line providing human readable english text about the push
"""
__slots__ = ('local_ref', 'remote_ref_string', 'flags', 'old_commit', '_remote', 'summary')
NEW_TAG, NEW_HEAD, NO_MATCH, REJECTED, REMOTE_REJECTED, REMOTE_FAILURE, DELETED, \
FORCED_UPDATE, FAST_FORWARD, UP_TO_DATE, ERROR = [ 1 << x for x in range(11) ]
_flag_map = { 'X' : NO_MATCH, '-' : DELETED, '*' : 0,
'+' : FORCED_UPDATE, ' ' : FAST_FORWARD,
'=' : UP_TO_DATE, '!' : ERROR }
def __init__(self, flags, local_ref, remote_ref_string, remote, old_commit=None,
summary=''):
""" Initialize a new instance """
self.flags = flags
self.local_ref = local_ref
self.remote_ref_string = remote_ref_string
self._remote = remote
self.old_commit = old_commit
self.summary = summary
@property
def remote_ref(self):
"""
:return:
Remote Reference or TagReference in the local repository corresponding
to the remote_ref_string kept in this instance."""
# translate heads to a local remote, tags stay as they are
if self.remote_ref_string.startswith("refs/tags"):
return TagReference(self._remote.repo, self.remote_ref_string)
elif self.remote_ref_string.startswith("refs/heads"):
remote_ref = Reference(self._remote.repo, self.remote_ref_string)
return RemoteReference(self._remote.repo, "refs/remotes/%s/%s" % (str(self._remote), remote_ref.name))
else:
raise ValueError("Could not handle remote ref: %r" % self.remote_ref_string)
# END
@classmethod
def _from_line(cls, remote, line):
"""Create a new PushInfo instance as parsed from line which is expected to be like
refs/heads/master:refs/heads/master 05d2687..1d0568e"""
control_character, from_to, summary = line.split('\t', 3)
flags = 0
# control character handling
try:
flags |= cls._flag_map[ control_character ]
except KeyError:
raise ValueError("Control Character %r unknown as parsed from line %r" % (control_character, line))
# END handle control character
# from_to handling
from_ref_string, to_ref_string = from_to.split(':')
if flags & cls.DELETED:
from_ref = None
else:
from_ref = Reference.from_path(remote.repo, from_ref_string)
# commit handling, could be message or commit info
old_commit = None
if summary.startswith('['):
if "[rejected]" in summary:
flags |= cls.REJECTED
elif "[remote rejected]" in summary:
flags |= cls.REMOTE_REJECTED
elif "[remote failure]" in summary:
flags |= cls.REMOTE_FAILURE
elif "[no match]" in summary:
flags |= cls.ERROR
elif "[new tag]" in summary:
flags |= cls.NEW_TAG
elif "[new branch]" in summary:
flags |= cls.NEW_HEAD
# uptodate encoded in control character
else:
# fast-forward or forced update - was encoded in control character,
# but we parse the old and new commit
split_token = "..."
if control_character == " ":
split_token = ".."
old_sha, new_sha = summary.split(' ')[0].split(split_token)
# have to use constructor here as the sha usually is abbreviated
old_commit = remote.repo.commit(old_sha)
# END message handling
return PushInfo(flags, from_ref, to_ref_string, remote, old_commit, summary)
class FetchInfo(object):
"""
Carries information about the results of a fetch operation of a single head::
info = remote.fetch()[0]
info.ref # Symbolic Reference or RemoteReference to the changed
# remote head or FETCH_HEAD
info.flags # additional flags to be & with enumeration members,
# i.e. info.flags & info.REJECTED
# is 0 if ref is SymbolicReference
info.note # additional notes given by git-fetch intended for the user
info.old_commit # if info.flags & info.FORCED_UPDATE|info.FAST_FORWARD,
# field is set to the previous location of ref, otherwise None
"""
__slots__ = ('ref','old_commit', 'flags', 'note')
NEW_TAG, NEW_HEAD, HEAD_UPTODATE, TAG_UPDATE, REJECTED, FORCED_UPDATE, \
FAST_FORWARD, ERROR = [ 1 << x for x in range(8) ]
# %c %-*s %-*s -> %s (%s)
re_fetch_result = re.compile("^\s*(.) (\[?[\w\s\.]+\]?)\s+(.+) -> ([/\w_\+\.-]+)( \(.*\)?$)?")
_flag_map = { '!' : ERROR, '+' : FORCED_UPDATE, '-' : TAG_UPDATE, '*' : 0,
'=' : HEAD_UPTODATE, ' ' : FAST_FORWARD }
def __init__(self, ref, flags, note = '', old_commit = None):
"""
Initialize a new instance
"""
self.ref = ref
self.flags = flags
self.note = note
self.old_commit = old_commit
def __str__(self):
return self.name
@property
def name(self):
""":return: Name of our remote ref"""
return self.ref.name
@property
def commit(self):
""":return: Commit of our remote ref"""
return self.ref.commit
@classmethod
def _from_line(cls, repo, line, fetch_line):
"""Parse information from the given line as returned by git-fetch -v
and return a new FetchInfo object representing this information.
We can handle a line as follows
"%c %-*s %-*s -> %s%s"
Where c is either ' ', !, +, -, *, or =
! means error
+ means success forcing update
- means a tag was updated
* means birth of new branch or tag
= means the head was up to date ( and not moved )
' ' means a fast-forward
fetch line is the corresponding line from FETCH_HEAD, like
acb0fa8b94ef421ad60c8507b634759a472cd56c not-for-merge branch '0.1.7RC' of /tmp/tmpya0vairemote_repo"""
match = cls.re_fetch_result.match(line)
if match is None:
raise ValueError("Failed to parse line: %r" % line)
# parse lines
control_character, operation, local_remote_ref, remote_local_ref, note = match.groups()
try:
new_hex_sha, fetch_operation, fetch_note = fetch_line.split("\t")
ref_type_name, fetch_note = fetch_note.split(' ', 1)
except ValueError: # unpack error
raise ValueError("Failed to parse FETCH__HEAD line: %r" % fetch_line)
# handle FETCH_HEAD and figure out ref type
# If we do not specify a target branch like master:refs/remotes/origin/master,
# the fetch result is stored in FETCH_HEAD which destroys the rule we usually
# have. In that case we use a symbolic reference which is detached
ref_type = None
if remote_local_ref == "FETCH_HEAD":
ref_type = SymbolicReference
elif ref_type_name in ("remote-tracking", "branch"):
# note: remote-tracking is just the first part of the 'remote-tracking branch' token.
# We don't parse it correctly, but its enough to know what to do, and its new in git 1.7something
ref_type = RemoteReference
elif ref_type_name == "tag":
ref_type = TagReference
else:
raise TypeError("Cannot handle reference type: %r" % ref_type_name)
#END handle ref type
# create ref instance
if ref_type is SymbolicReference:
remote_local_ref = ref_type(repo, "FETCH_HEAD")
else:
# determine prefix. Tags are usually pulled into refs/tags, they may have subdirectories.
# It is not clear sometimes where exactly the item is, unless we have an absolute path as indicated
# by the 'ref/' prefix. Otherwise even a tag could be in refs/remotes, which is when it will have the
# 'tags/' subdirectory in its path.
# We don't want to test for actual existence, but try to figure everything out analytically.
ref_path = None
remote_local_ref = remote_local_ref.strip()
if remote_local_ref.startswith(Reference._common_path_default + "/"):
# always use actual type if we get absolute paths
# Will always be the case if something is fetched outside of refs/remotes (if its not a tag)
ref_path = remote_local_ref
if ref_type is not TagReference and not remote_local_ref.startswith(RemoteReference._common_path_default + "/"):
ref_type = Reference
#END downgrade remote reference
elif ref_type is TagReference and 'tags/' in remote_local_ref:
# even though its a tag, it is located in refs/remotes
ref_path = join_path(RemoteReference._common_path_default, remote_local_ref)
else:
ref_path = join_path(ref_type._common_path_default, remote_local_ref)
#END obtain refpath
# even though the path could be within the git conventions, we make
# sure we respect whatever the user wanted, and disabled path checking
remote_local_ref = ref_type(repo, ref_path, check_path=False)
# END create ref instance
note = ( note and note.strip() ) or ''
# parse flags from control_character
flags = 0
try:
flags |= cls._flag_map[control_character]
except KeyError:
raise ValueError("Control character %r unknown as parsed from line %r" % (control_character, line))
# END control char exception hanlding
# parse operation string for more info - makes no sense for symbolic refs
old_commit = None
if isinstance(remote_local_ref, Reference):
if 'rejected' in operation:
flags |= cls.REJECTED
if 'new tag' in operation:
flags |= cls.NEW_TAG
if 'new branch' in operation:
flags |= cls.NEW_HEAD
if '...' in operation or '..' in operation:
split_token = '...'
if control_character == ' ':
split_token = split_token[:-1]
old_commit = repo.rev_parse(operation.split(split_token)[0])
# END handle refspec
# END reference flag handling
return cls(remote_local_ref, flags, note, old_commit)
class Remote(LazyMixin, Iterable):
"""Provides easy read and write access to a git remote.
Everything not part of this interface is considered an option for the current
remote, allowing constructs like remote.pushurl to query the pushurl.
NOTE: When querying configuration, the configuration accessor will be cached
to speed up subsequent accesses."""
__slots__ = ( "repo", "name", "_config_reader" )
_id_attribute_ = "name"
def __init__(self, repo, name):
"""Initialize a remote instance
:param repo: The repository we are a remote of
:param name: the name of the remote, i.e. 'origin'"""
self.repo = repo
self.name = name
if os.name == 'nt':
# some oddity: on windows, python 2.5, it for some reason does not realize
# that it has the config_writer property, but instead calls __getattr__
# which will not yield the expected results. 'pinging' the members
# with a dir call creates the config_writer property that we require
# ... bugs like these make me wonder wheter python really wants to be used
# for production. It doesn't happen on linux though.
dir(self)
# END windows special handling
def __getattr__(self, attr):
"""Allows to call this instance like
remote.special( *args, **kwargs) to call git-remote special self.name"""
if attr == "_config_reader":
return super(Remote, self).__getattr__(attr)
# sometimes, probably due to a bug in python itself, we are being called
# even though a slot of the same name exists
try:
return self._config_reader.get(attr)
except NoOptionError:
return super(Remote, self).__getattr__(attr)
# END handle exception
def _config_section_name(self):
return 'remote "%s"' % self.name
def _set_cache_(self, attr):
if attr == "_config_reader":
self._config_reader = SectionConstraint(self.repo.config_reader(), self._config_section_name())
else:
super(Remote, self)._set_cache_(attr)
def __str__(self):
return self.name
def __repr__(self):
return '<git.%s "%s">' % (self.__class__.__name__, self.name)
def __eq__(self, other):
return self.name == other.name
def __ne__(self, other):
return not ( self == other )
def __hash__(self):
return hash(self.name)
@classmethod
def iter_items(cls, repo):
""":return: Iterator yielding Remote objects of the given repository"""
for section in repo.config_reader("repository").sections():
if not section.startswith('remote'):
continue
lbound = section.find('"')
rbound = section.rfind('"')
if lbound == -1 or rbound == -1:
raise ValueError("Remote-Section has invalid format: %r" % section)
yield Remote(repo, section[lbound+1:rbound])
# END for each configuration section
@property
def refs(self):
"""
:return:
IterableList of RemoteReference objects. It is prefixed, allowing
you to omit the remote path portion, i.e.::
remote.refs.master # yields RemoteReference('/refs/remotes/origin/master')"""
out_refs = IterableList(RemoteReference._id_attribute_, "%s/" % self.name)
out_refs.extend(RemoteReference.list_items(self.repo, remote=self.name))
assert out_refs, "Remote %s did not have any references" % self.name
return out_refs
@property
def stale_refs(self):
"""
:return:
IterableList RemoteReference objects that do not have a corresponding
head in the remote reference anymore as they have been deleted on the
remote side, but are still available locally.
The IterableList is prefixed, hence the 'origin' must be omitted. See
'refs' property for an example."""
out_refs = IterableList(RemoteReference._id_attribute_, "%s/" % self.name)
for line in self.repo.git.remote("prune", "--dry-run", self).splitlines()[2:]:
# expecting
# * [would prune] origin/new_branch
token = " * [would prune] "
if not line.startswith(token):
raise ValueError("Could not parse git-remote prune result: %r" % line)
fqhn = "%s/%s" % (RemoteReference._common_path_default,line.replace(token, ""))
out_refs.append(RemoteReference(self.repo, fqhn))
# END for each line
return out_refs
@classmethod
def create(cls, repo, name, url, **kwargs):
"""Create a new remote to the given repository
:param repo: Repository instance that is to receive the new remote
:param name: Desired name of the remote
:param url: URL which corresponds to the remote's name
:param kwargs:
Additional arguments to be passed to the git-remote add command
:return: New Remote instance
:raise GitCommandError: in case an origin with that name already exists"""
repo.git.remote( "add", name, url, **kwargs )
return cls(repo, name)
# add is an alias
add = create
@classmethod
def remove(cls, repo, name ):
"""Remove the remote with the given name"""
repo.git.remote("rm", name)
# alias
rm = remove
def rename(self, new_name):
"""Rename self to the given new_name
:return: self """
if self.name == new_name:
return self
self.repo.git.remote("rename", self.name, new_name)
self.name = new_name
try:
del(self._config_reader) # it contains cached values, section names are different now
except AttributeError:
pass
#END handle exception
return self
def update(self, **kwargs):
"""Fetch all changes for this remote, including new branches which will
be forced in ( in case your local remote branch is not part the new remote branches
ancestry anymore ).
:param kwargs:
Additional arguments passed to git-remote update
:return: self """
self.repo.git.remote("update", self.name)
return self
def _get_fetch_info_from_stderr(self, proc, progress):
# skip first line as it is some remote info we are not interested in
output = IterableList('name')
# lines which are no progress are fetch info lines
# this also waits for the command to finish
# Skip some progress lines that don't provide relevant information
fetch_info_lines = list()
for line in digest_process_messages(proc.stderr, progress):
if line.startswith('From') or line.startswith('remote: Total') or line.startswith('POST') \
or line.startswith(' ='):
continue
elif line.startswith('warning:'):
print >> sys.stderr, line
continue
elif line.startswith('fatal:'):
raise GitCommandError(("Error when fetching: %s" % line,), 2)
# END handle special messages
fetch_info_lines.append(line)
# END for each line
# read head information
fp = open(join(self.repo.git_dir, 'FETCH_HEAD'),'r')
fetch_head_info = fp.readlines()
fp.close()
# NOTE: HACK Just disabling this line will make github repositories work much better.
# I simply couldn't stand it anymore, so here is the quick and dirty fix ... .
# This project needs a lot of work !
# assert len(fetch_info_lines) == len(fetch_head_info), "len(%s) != len(%s)" % (fetch_head_info, fetch_info_lines)
output.extend(FetchInfo._from_line(self.repo, err_line, fetch_line)
for err_line,fetch_line in zip(fetch_info_lines, fetch_head_info))
finalize_process(proc)
return output
def _get_push_info(self, proc, progress):
# read progress information from stderr
# we hope stdout can hold all the data, it should ...
# read the lines manually as it will use carriage returns between the messages
# to override the previous one. This is why we read the bytes manually
digest_process_messages(proc.stderr, progress)
output = IterableList('name')
for line in proc.stdout.readlines():
try:
output.append(PushInfo._from_line(self, line))
except ValueError:
# if an error happens, additional info is given which we cannot parse
pass
# END exception handling
# END for each line
finalize_process(proc)
return output
def fetch(self, refspec=None, progress=None, **kwargs):
"""Fetch the latest changes for this remote
:param refspec:
A "refspec" is used by fetch and push to describe the mapping
between remote ref and local ref. They are combined with a colon in
the format <src>:<dst>, preceded by an optional plus sign, +.
For example: git fetch $URL refs/heads/master:refs/heads/origin means
"grab the master branch head from the $URL and store it as my origin
branch head". And git push $URL refs/heads/master:refs/heads/to-upstream
means "publish my master branch head as to-upstream branch at $URL".
See also git-push(1).
Taken from the git manual
Fetch supports multiple refspecs (as the
underlying git-fetch does) - supplying a list rather than a string
for 'refspec' will make use of this facility.
:param progress: See 'push' method
:param kwargs: Additional arguments to be passed to git-fetch
:return:
IterableList(FetchInfo, ...) list of FetchInfo instances providing detailed
information about the fetch results
:note:
As fetch does not provide progress information to non-ttys, we cannot make
it available here unfortunately as in the 'push' method."""
kwargs = add_progress(kwargs, self.repo.git, progress)
if isinstance(refspec, list):
args = refspec
else:
args = [refspec]
proc = self.repo.git.fetch(self, *args, with_extended_output=True, as_process=True, v=True, **kwargs)
return self._get_fetch_info_from_stderr(proc, progress or RemoteProgress())
def pull(self, refspec=None, progress=None, **kwargs):
"""Pull changes from the given branch, being the same as a fetch followed
by a merge of branch with your local branch.
:param refspec: see 'fetch' method
:param progress: see 'push' method
:param kwargs: Additional arguments to be passed to git-pull
:return: Please see 'fetch' method """
kwargs = add_progress(kwargs, self.repo.git, progress)
proc = self.repo.git.pull(self, refspec, with_extended_output=True, as_process=True, v=True, **kwargs)
return self._get_fetch_info_from_stderr(proc, progress or RemoteProgress())
def push(self, refspec=None, progress=None, **kwargs):
"""Push changes from source branch in refspec to target branch in refspec.
:param refspec: see 'fetch' method
:param progress:
Instance of type RemoteProgress allowing the caller to receive
progress information until the method returns.
If None, progress information will be discarded
:param kwargs: Additional arguments to be passed to git-push
:return:
IterableList(PushInfo, ...) iterable list of PushInfo instances, each
one informing about an individual head which had been updated on the remote
side.
If the push contains rejected heads, these will have the PushInfo.ERROR bit set
in their flags.
If the operation fails completely, the length of the returned IterableList will
be null."""
kwargs = add_progress(kwargs, self.repo.git, progress)
proc = self.repo.git.push(self, refspec, porcelain=True, as_process=True, **kwargs)
return self._get_push_info(proc, progress or RemoteProgress())
@property
def config_reader(self):
"""
:return:
GitConfigParser compatible object able to read options for only our remote.
Hence you may simple type config.get("pushurl") to obtain the information"""
return self._config_reader
@property
def config_writer(self):
"""
:return: GitConfigParser compatible object able to write options for this remote.
:note:
You can only own one writer at a time - delete it to release the
configuration file and make it useable by others.
To assure consistent results, you should only query options through the
writer. Once you are done writing, you are free to use the config reader
once again."""
writer = self.repo.config_writer()
# clear our cache to assure we re-read the possibly changed configuration
try:
del(self._config_reader)
except AttributeError:
pass
#END handle exception
return SectionConstraint(writer, self._config_section_name())
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