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import collections
import itertools
import os
import urllib
import urllib2
import re
import cStringIO
import StringIO
from dulwich.errors import HangupException, GitProtocolError
from dulwich.objects import Blob, Commit, Tag, Tree, parse_timezone
from dulwich.pack import create_delta, apply_delta
from dulwich.repo import Repo, check_ref_format
from dulwich import client
from dulwich import config as dul_config
from dulwich import diff_tree
from mercurial.i18n import _
from mercurial.node import hex, bin, nullid
from mercurial import (
bookmarks,
commands,
context,
encoding,
util as hgutil,
url,
)
import _ssh
import git2hg
import hg2git
import util
from overlay import overlayrepo
RE_GIT_AUTHOR = re.compile('^(.*?) ?\<(.*?)(?:\>(.*))?$')
RE_GIT_SANITIZE_AUTHOR = re.compile('[<>\n]')
RE_GIT_AUTHOR_EXTRA = re.compile('^(.*?)\ ext:\((.*)\) <(.*)\>$')
RE_GIT_EXTRA_KEY = re.compile('GIT([0-9]*)-(.*)')
# Test for git:// and git+ssh:// URI.
# Support several URL forms, including separating the
# host and path with either a / or : (sepr)
RE_GIT_URI = re.compile(
r'^(?P<scheme>git([+]ssh)?://)(?P<host>.*?)(:(?P<port>\d+))?'
r'(?P<sepr>[:/])(?P<path>.*)$')
RE_NEWLINES = re.compile('[\r\n]')
RE_GIT_PROGRESS = re.compile('\((\d+)/(\d+)\)')
RE_AUTHOR_FILE = re.compile('\s*=\s*')
CALLBACK_BUFFER = ''
class GitProgress(object):
"""convert git server progress strings into mercurial progress"""
def __init__(self, ui):
self.ui = ui
self.lasttopic = None
self.msgbuf = ''
def progress(self, msg):
# 'Counting objects: 33640, done.\n'
# 'Compressing objects: 0% (1/9955) \r
msgs = RE_NEWLINES.split(self.msgbuf + msg)
self.msgbuf = msgs.pop()
for msg in msgs:
td = msg.split(':', 1)
data = td.pop()
if not td:
self.flush(data)
continue
topic = td[0]
m = RE_GIT_PROGRESS.search(data)
if m:
if self.lasttopic and self.lasttopic != topic:
self.flush()
self.lasttopic = topic
pos, total = map(int, m.group(1, 2))
self.ui.progress(topic, pos, total=total)
else:
self.flush(msg)
def flush(self, msg=None):
if self.lasttopic:
self.ui.progress(self.lasttopic, None)
self.lasttopic = None
if msg:
self.ui.note(msg + '\n')
class GitHandler(object):
map_file = 'git-mapfile'
remote_refs_file = 'git-remote-refs'
tags_file = 'git-tags'
def __init__(self, dest_repo, ui):
self.repo = dest_repo
self.ui = ui
if ui.configbool('git', 'intree'):
self.gitdir = self.repo.wjoin('.git')
else:
self.gitdir = self.repo.join('git')
self.init_author_file()
self.paths = ui.configitems('paths')
self.branch_bookmark_suffix = ui.config('git',
'branch_bookmark_suffix')
self._map_git_real = None
self._map_hg_real = None
self.load_tags()
self._remote_refs = None
@property
def _map_git(self):
if self._map_git_real is None:
self.load_map()
return self._map_git_real
@property
def _map_hg(self):
if self._map_hg_real is None:
self.load_map()
return self._map_hg_real
@property
def remote_refs(self):
if self._remote_refs is None:
self.load_remote_refs()
return self._remote_refs
@hgutil.propertycache
def git(self):
# Dulwich is going to try and join unicode ref names against
# the repository path to try and read unpacked refs. This
# doesn't match hg's bytes-only view of filesystems, we just
# have to cope with that. As a workaround, try decoding our
# (bytes) path to the repo in hg's active encoding and hope
# for the best.
gitpath = self.gitdir.decode(encoding.encoding, encoding.encodingmode)
# make the git data directory
if os.path.exists(self.gitdir):
return Repo(gitpath)
else:
os.mkdir(self.gitdir)
return Repo.init_bare(gitpath)
def init_author_file(self):
self.author_map = {}
if self.ui.config('git', 'authors'):
with open(self.repo.wjoin(self.ui.config('git', 'authors'))) as f:
for line in f:
line = line.strip()
if not line or line.startswith('#'):
continue
from_, to = RE_AUTHOR_FILE.split(line, 2)
self.author_map[from_] = to
# FILE LOAD AND SAVE METHODS
def map_set(self, gitsha, hgsha):
self._map_git[gitsha] = hgsha
self._map_hg[hgsha] = gitsha
def map_hg_get(self, gitsha):
return self._map_git.get(gitsha)
def map_git_get(self, hgsha):
return self._map_hg.get(hgsha)
def load_map(self):
map_git_real = {}
map_hg_real = {}
if os.path.exists(self.repo.join(self.map_file)):
for line in self.repo.opener(self.map_file):
# format is <40 hex digits> <40 hex digits>\n
if len(line) != 82:
raise ValueError(
_('corrupt mapfile: incorrect line length %d') %
len(line))
gitsha = line[:40]
hgsha = line[41:81]
map_git_real[gitsha] = hgsha
map_hg_real[hgsha] = gitsha
self._map_git_real = map_git_real
self._map_hg_real = map_hg_real
def save_map(self, map_file):
file = self.repo.opener(map_file, 'w+', atomictemp=True)
map_hg = self._map_hg
buf = cStringIO.StringIO()
bwrite = buf.write
for hgsha, gitsha in map_hg.iteritems():
bwrite("%s %s\n" % (gitsha, hgsha))
file.write(buf.getvalue())
buf.close()
# If this complains, atomictempfile no longer has close
file.close()
def load_tags(self):
self.tags = {}
if os.path.exists(self.repo.join(self.tags_file)):
for line in self.repo.opener(self.tags_file):
sha, name = line.strip().split(' ', 1)
self.tags[name] = sha
def save_tags(self):
file = self.repo.opener(self.tags_file, 'w+', atomictemp=True)
for name, sha in sorted(self.tags.iteritems()):
if not self.repo.tagtype(name) == 'global':
file.write("%s %s\n" % (sha, name))
# If this complains, atomictempfile no longer has close
file.close()
def load_remote_refs(self):
self._remote_refs = {}
refdir = os.path.join(self.git.path, 'refs', 'remotes')
paths = self.paths
# if paths are set, we should still check 'default'
if not paths:
paths = [('default', None),]
# we avoid using dulwich's refs method because it is incredibly slow;
# on a repo with a few hundred branches and a few thousand tags,
# dulwich took about 200ms
for p in paths:
remotedir = os.path.join(refdir, p[0])
for root, dirs, files in os.walk(remotedir):
for f in files:
try:
ref = root.replace(refdir + os.sep, '') + '/'
node = open(os.path.join(root, f)).read().strip()
self._remote_refs[ref + f] = bin(self._map_git[node])
except (KeyError, IOError):
pass
# END FILE LOAD AND SAVE METHODS
# COMMANDS METHODS
def import_commits(self, remote_name):
refs = self.git.refs.as_dict()
filteredrefs = self.filter_min_date(refs)
self.import_git_objects(remote_name, filteredrefs)
self.update_hg_bookmarks(refs)
self.save_map(self.map_file)
def fetch(self, remote, heads):
refs = self.fetch_pack(remote, heads)
remote_name = self.remote_name(remote)
oldheads = self.repo.changelog.heads()
imported = 0
if refs:
filteredrefs = self.filter_min_date(self.filter_refs(refs, heads))
imported = self.import_git_objects(remote_name, filteredrefs)
self.import_tags(refs)
self.update_hg_bookmarks(refs)
if remote_name:
self.update_remote_branches(remote_name, refs)
elif not self.paths:
# intial cloning
self.update_remote_branches('default', refs)
# "Activate" a tipmost bookmark.
bms = self.repo['tip'].bookmarks()
if bms:
try:
bookmarks.activate(self.repo, bms[0])
except AttributeError:
# hg < 3.5
bookmarks.setcurrent(self.repo, bms[0])
self.save_map(self.map_file)
if imported == 0:
return 0
# code taken from localrepo.py:addchangegroup
dh = 0
if oldheads:
heads = self.repo.changelog.heads()
dh = len(heads) - len(oldheads)
for h in heads:
if h not in oldheads and self.repo[h].closesbranch():
dh -= 1
if dh < 0:
return dh - 1
else:
return dh + 1
def export_commits(self):
try:
self.export_git_objects()
self.export_hg_tags()
self.update_references()
finally:
self.save_map(self.map_file)
def get_refs(self, remote):
self.export_commits()
client, path = self.get_transport_and_path(remote)
old_refs = {}
new_refs = {}
def changed(refs):
old_refs.update(refs)
exportable = self.get_exportable()
new_refs.update(self.get_changed_refs(refs, exportable, True))
return refs # always return the same refs to make the send a no-op
try:
client.send_pack(path, changed, lambda have, want: [])
changed_refs = [ref for ref, sha in new_refs.iteritems()
if sha != old_refs.get(ref)]
new = [bin(self.map_hg_get(new_refs[ref])) for ref in changed_refs]
old = {}
for r in old_refs:
old_ref = self.map_hg_get(old_refs[r])
if old_ref:
old[bin(old_ref)] = 1
return old, new
except (HangupException, GitProtocolError), e:
raise hgutil.Abort(_("git remote error: ") + str(e))
def push(self, remote, revs, force):
self.export_commits()
old_refs, new_refs = self.upload_pack(remote, revs, force)
remote_name = self.remote_name(remote)
if remote_name and new_refs:
for ref, new_sha in sorted(new_refs.iteritems()):
old_sha = old_refs.get(ref)
if old_sha is None:
if self.ui.verbose:
self.ui.note("adding reference %s::%s => GIT:%s\n" %
(remote_name, ref, new_sha[0:8]))
else:
self.ui.status("adding reference %s\n" % ref)
elif new_sha != old_sha:
if self.ui.verbose:
self.ui.note("updating reference %s::%s => GIT:%s\n" %
(remote_name, ref, new_sha[0:8]))
else:
self.ui.status("updating reference %s\n" % ref)
else:
self.ui.debug("unchanged reference %s::%s => GIT:%s\n" %
(remote_name, ref, new_sha[0:8]))
self.update_remote_branches(remote_name, new_refs)
if old_refs == new_refs:
self.ui.status(_("no changes found\n"))
ret = None
elif len(new_refs) > len(old_refs):
ret = 1 + (len(new_refs) - len(old_refs))
elif len(old_refs) > len(new_refs):
ret = -1 - (len(new_refs) - len(old_refs))
else:
ret = 1
return ret
def clear(self):
mapfile = self.repo.join(self.map_file)
if os.path.exists(self.gitdir):
for root, dirs, files in os.walk(self.gitdir, topdown=False):
for name in files:
os.remove(os.path.join(root, name))
for name in dirs:
os.rmdir(os.path.join(root, name))
os.rmdir(self.gitdir)
if os.path.exists(mapfile):
os.remove(mapfile)
# incoming support
def getremotechanges(self, remote, revs):
self.export_commits()
refs = self.fetch_pack(remote.path, revs)
# refs contains all remote refs. Prune to only those requested.
if revs:
reqrefs = {}
for rev in revs:
for n in ('refs/heads/' + rev, 'refs/tags/' + rev):
if n in refs:
reqrefs[n] = refs[n]
else:
reqrefs = refs
commits = [bin(c) for c in self.get_git_incoming(reqrefs).commits]
b = overlayrepo(self, commits, refs)
return (b, commits, lambda: None)
# CHANGESET CONVERSION METHODS
def export_git_objects(self):
repo = self.repo
clnode = repo.changelog.node
nodes = (clnode(n) for n in repo)
export = (repo[node] for node in nodes if not hex(node) in
self._map_hg)
export = [ctx for ctx in export
if ctx.extra().get('hg-git', None) != 'octopus']
total = len(export)
if not total:
return
self.ui.note(_("exporting hg objects to git\n"))
# By only exporting deltas, the assertion is that all previous objects
# for all other changesets are already present in the Git repository.
# This assertion is necessary to prevent redundant work. Here, nodes,
# and therefore export, is in topological order. By definition,
# export[0]'s parents must be present in Git, so we start the
# incremental exporter from there.
pctx = export[0].p1()
pnode = pctx.node()
if pnode == nullid:
gitcommit = None
else:
gitsha = self._map_hg[hex(pnode)]
try:
gitcommit = self.git[gitsha]
except KeyError:
raise hgutil.Abort(_('Parent SHA-1 not present in Git'
'repo: %s' % gitsha))
exporter = hg2git.IncrementalChangesetExporter(
self.repo, pctx, self.git.object_store, gitcommit)
for i, ctx in enumerate(export):
self.ui.progress('exporting', i, total=total)
self.export_hg_commit(ctx.node(), exporter)
self.ui.progress('exporting', None, total=total)
# convert this commit into git objects
# go through the manifest, convert all blobs/trees we don't have
# write the commit object (with metadata info)
def export_hg_commit(self, rev, exporter):
self.ui.note(_("converting revision %s\n") % hex(rev))
oldenc = self.swap_out_encoding()
ctx = self.repo.changectx(rev)
extra = ctx.extra()
commit = Commit()
(time, timezone) = ctx.date()
# work around to bad timezone offets - dulwich does not handle
# sub minute based timezones. In the one known case, it was a
# manual edit that led to the unusual value. Based on that,
# there is no reason to round one way or the other, so do the
# simplest and round down.
timezone -= (timezone % 60)
commit.author = self.get_git_author(ctx)
commit.author_time = int(time)
commit.author_timezone = -timezone
if 'committer' in extra:
# fixup timezone
(name, timestamp, timezone) = extra['committer'].rsplit(' ', 2)
commit.committer = name
commit.commit_time = timestamp
# work around a timezone format change
if int(timezone) % 60 != 0: # pragma: no cover
timezone = parse_timezone(timezone)
# Newer versions of Dulwich return a tuple here
if isinstance(timezone, tuple):
timezone, neg_utc = timezone
commit._commit_timezone_neg_utc = neg_utc
else:
timezone = -int(timezone)
commit.commit_timezone = timezone
else:
commit.committer = commit.author
commit.commit_time = commit.author_time
commit.commit_timezone = commit.author_timezone
commit.parents = []
for parent in self.get_git_parents(ctx):
hgsha = hex(parent.node())
git_sha = self.map_git_get(hgsha)
if git_sha:
if git_sha not in self.git.object_store:
raise hgutil.Abort(_('Parent SHA-1 not present in Git'
'repo: %s' % git_sha))
commit.parents.append(git_sha)
commit.message, extra = self.get_git_message_and_extra(ctx)
commit.extra.extend(extra)
if 'encoding' in extra:
commit.encoding = extra['encoding']
for obj, nodeid in exporter.update_changeset(ctx):
if obj.id not in self.git.object_store:
self.git.object_store.add_object(obj)
tree_sha = exporter.root_tree_sha
if tree_sha not in self.git.object_store:
raise hgutil.Abort(_('Tree SHA-1 not present in Git repo: %s' %
tree_sha))
commit.tree = tree_sha
if commit.id not in self.git.object_store:
self.git.object_store.add_object(commit)
self.map_set(commit.id, ctx.hex())
self.swap_out_encoding(oldenc)
return commit.id
def get_valid_git_username_email(self, name):
r"""Sanitize usernames and emails to fit git's restrictions.
The following is taken from the man page of git's fast-import
command:
[...] Likewise LF means one (and only one) linefeed [...]
committer
The committer command indicates who made this commit,
and when they made it.
Here <name> is the person's display name (for example
"Com M Itter") and <email> is the person's email address
("cm@example.com[1]"). LT and GT are the literal
less-than (\x3c) and greater-than (\x3e) symbols. These
are required to delimit the email address from the other
fields in the line. Note that <name> and <email> are
free-form and may contain any sequence of bytes, except
LT, GT and LF. <name> is typically UTF-8 encoded.
Accordingly, this function makes sure that there are none of the
characters <, >, or \n in any string which will be used for
a git username or email. Before this, it first removes left
angle brackets and spaces from the beginning, and right angle
brackets and spaces from the end, of this string, to convert
such things as " <john@doe.com> " to "john@doe.com" for
convenience.
TESTS:
>>> from mercurial.ui import ui
>>> g = GitHandler('', ui()).get_valid_git_username_email
>>> g('John Doe')
'John Doe'
>>> g('john@doe.com')
'john@doe.com'
>>> g(' <john@doe.com> ')
'john@doe.com'
>>> g(' <random<\n<garbage\n> > > ')
'random???garbage?'
>>> g('Typo in hgrc >but.hg-git@handles.it.gracefully>')
'Typo in hgrc ?but.hg-git@handles.it.gracefully'
"""
return RE_GIT_SANITIZE_AUTHOR.sub('?', name.lstrip('< ').rstrip('> '))
def get_git_author(self, ctx):
# hg authors might not have emails
author = ctx.user()
# see if a translation exists
author = self.author_map.get(author, author)
# check for git author pattern compliance
a = RE_GIT_AUTHOR.match(author)
if a:
name = self.get_valid_git_username_email(a.group(1))
email = self.get_valid_git_username_email(a.group(2))
if a.group(3) != None and len(a.group(3)) != 0:
name += ' ext:(' + urllib.quote(a.group(3)) + ')'
author = '%s <%s>' \
% (self.get_valid_git_username_email(name),
self.get_valid_git_username_email(email))
elif '@' in author:
author = '%s <%s>' \
% (self.get_valid_git_username_email(author),
self.get_valid_git_username_email(author))
else:
author = self.get_valid_git_username_email(author) + ' <none@none>'
if 'author' in ctx.extra():
author = "".join(apply_delta(author, ctx.extra()['author']))
return author
def get_git_parents(self, ctx):
def is_octopus_part(ctx):
olist = ('octopus', 'octopus-done')
return ctx.extra().get('hg-git', None) in olist
parents = []
if ctx.extra().get('hg-git', None) == 'octopus-done':
# implode octopus parents
part = ctx
while is_octopus_part(part):
(p1, p2) = part.parents()
assert ctx.extra().get('hg-git', None) != 'octopus'
parents.append(p1)
part = p2
parents.append(p2)
else:
parents = ctx.parents()
return parents
def get_git_message_and_extra(self, ctx):
extra = ctx.extra()
message = ctx.description() + "\n"
if 'message' in extra:
message = "".join(apply_delta(message, extra['message']))
# HG EXTRA INFORMATION
# test only -- do not document this!
extra_in_message = self.ui.configbool('git', 'debugextrainmessage',
False)
extra_message = ''
git_extra = []
if ctx.branch() != 'default':
# we always store the branch in the extra message
extra_message += "branch : " + ctx.branch() + "\n"
# Git native extra items always come first, followed by hg renames,
# followed by hg extra keys
git_extraitems = []
for key, value in extra.items():
m = RE_GIT_EXTRA_KEY.match(key)
if m is not None:
git_extraitems.append((int(m.group(1)), m.group(2), value))
del extra[key]
git_extraitems.sort()
for i, field, value in git_extraitems:
git_extra.append((urllib.unquote(field), urllib.unquote(value)))
if extra.get('hg-git-rename-source', None) != 'git':
renames = []
for f in ctx.files():
if f not in ctx.manifest():
continue
rename = ctx.filectx(f).renamed()
if rename:
renames.append((rename[0], f))
if renames:
for oldfile, newfile in renames:
if extra_in_message:
extra_message += ("rename : " + oldfile + " => " +
newfile + "\n")
else:
spec = '%s:%s' % (urllib.quote(oldfile),
urllib.quote(newfile))
git_extra.append(('HG:rename', spec))
# hg extra items always go at the end
extraitems = extra.items()
extraitems.sort()
for key, value in extraitems:
if key in ('author', 'committer', 'encoding', 'message', 'branch',
'hg-git', 'hg-git-rename-source'):
continue
else:
if extra_in_message:
extra_message += ("extra : " + key + " : " +
urllib.quote(value) + "\n")
else:
spec = '%s:%s' % (urllib.quote(key),
urllib.quote(value))
git_extra.append(('HG:extra', spec))
if extra_message:
message += "\n--HG--\n" + extra_message
if (extra.get('hg-git-rename-source', None) != 'git' and not
extra_in_message and not git_extra and extra_message == ''):
# We need to store this if no other metadata is stored. This
# indicates that when reimporting the commit into Mercurial we'll
# know not to detect renames.
git_extra.append(('HG:rename-source', 'hg'))
return message, git_extra
def get_git_incoming(self, refs):
return git2hg.find_incoming(self.git.object_store, self._map_git, refs)
def import_git_objects(self, remote_name, refs):
result = self.get_git_incoming(refs)
commits = result.commits
commit_cache = result.commit_cache
# import each of the commits, oldest first
total = len(commits)
if total:
self.ui.status(_("importing git objects into hg\n"))
else:
self.ui.status(_("no changes found\n"))
mapsavefreq = self.ui.configint('hggit', 'mapsavefrequency', 0)
for i, csha in enumerate(commits):
self.ui.progress('importing', i, total=total, unit='commits')
commit = commit_cache[csha]
self.import_git_commit(commit)
if mapsavefreq and i % mapsavefreq == 0:
self.ui.debug(_("saving mapfile\n"))
self.save_map(self.map_file)
self.ui.progress('importing', None, total=total, unit='commits')
# TODO if the tags cache is used, remove any dangling tag references
return total
def import_git_commit(self, commit):
self.ui.debug(_("importing: %s\n") % commit.id)
detect_renames = False
(strip_message, hg_renames,
hg_branch, extra) = git2hg.extract_hg_metadata(
commit.message, commit.extra)
if hg_renames is None:
detect_renames = True
# We have to store this unconditionally, even if there are no
# renames detected from Git. This is because we export an extra
# 'HG:rename-source' Git parameter when this isn't set, which will
# break bidirectionality.
extra['hg-git-rename-source'] = 'git'
else:
renames = hg_renames
gparents = map(self.map_hg_get, commit.parents)
for parent in gparents:
if parent not in self.repo:
raise hgutil.Abort(_('you appear to have run strip - '
'please run hg git-cleanup'))
# get a list of the changed, added, removed files and gitlinks
files, gitlinks, git_renames = self.get_files_changed(commit,
detect_renames)
if detect_renames:
renames = git_renames
git_commit_tree = self.git[commit.tree]
# Analyze hgsubstate and build an updated version using SHAs from
# gitlinks. Order of application:
# - preexisting .hgsubstate in git tree
# - .hgsubstate from hg parent
# - changes in gitlinks
hgsubstate = util.parse_hgsubstate(
self.git_file_readlines(git_commit_tree, '.hgsubstate'))
parentsubdata = ''
if gparents:
p1ctx = self.repo.changectx(gparents[0])
if '.hgsubstate' in p1ctx:
parentsubdata = p1ctx.filectx('.hgsubstate').data()
parentsubdata = parentsubdata.splitlines()
parentsubstate = util.parse_hgsubstate(parentsubdata)
for path, sha in parentsubstate.iteritems():
hgsubstate[path] = sha
for path, sha in gitlinks.iteritems():
if sha is None:
hgsubstate.pop(path, None)
else:
hgsubstate[path] = sha
# in case .hgsubstate wasn't among changed files
# force its inclusion if it wasn't already deleted
hgsubdeleted = files.get('.hgsubstate')
if hgsubdeleted:
hgsubdeleted = hgsubdeleted[0]
if hgsubdeleted or (not hgsubstate and parentsubdata):
files['.hgsubstate'] = True, None, None
elif util.serialize_hgsubstate(hgsubstate) != parentsubdata:
files['.hgsubstate'] = False, 0100644, None
# Analyze .hgsub and merge with .gitmodules
hgsub = None
gitmodules = self.parse_gitmodules(git_commit_tree)
if gitmodules:
hgsub = util.parse_hgsub(self.git_file_readlines(git_commit_tree,
'.hgsub'))
for (sm_path, sm_url, sm_name) in gitmodules:
hgsub[sm_path] = '[git]' + sm_url
files['.hgsub'] = (False, 0100644, None)
elif (commit.parents and '.gitmodules' in
self.git[self.git[commit.parents[0]].tree]):
# no .gitmodules in this commit, however present in the parent
# mark its hg counterpart as deleted (assuming .hgsub is there
# due to the same import_git_commit process
files['.hgsub'] = (True, 0100644, None)
date = (commit.author_time, -commit.author_timezone)
text = strip_message
origtext = text
try:
text.decode('utf-8')
except UnicodeDecodeError:
text = self.decode_guess(text, commit.encoding)
text = '\n'.join([l.rstrip() for l in text.splitlines()]).strip('\n')
if text + '\n' != origtext:
extra['message'] = create_delta(text + '\n', origtext)
author = commit.author
# convert extra data back to the end
if ' ext:' in commit.author:
m = RE_GIT_AUTHOR_EXTRA.match(commit.author)
if m:
name = m.group(1)
ex = urllib.unquote(m.group(2))
email = m.group(3)
author = name + ' <' + email + '>' + ex
if ' <none@none>' in commit.author:
author = commit.author[:-12]
try:
author.decode('utf-8')
except UnicodeDecodeError:
origauthor = author
author = self.decode_guess(author, commit.encoding)
extra['author'] = create_delta(author, origauthor)
oldenc = self.swap_out_encoding()
def findconvergedfiles(p1, p2):
# If any files have the same contents in both parents of a merge
# (and are therefore not reported as changed by Git) but are at
# different file revisions in Mercurial (because they arrived at
# those contents in different ways), we need to include them in
# the list of changed files so that Mercurial can join up their
# filelog histories (same as if the merge was done in Mercurial to
# begin with).
if p2 == nullid:
return []
manifest1 = self.repo.changectx(p1).manifest()
manifest2 = self.repo.changectx(p2).manifest()
return [path for path, node1 in manifest1.iteritems() if path not
in files and manifest2.get(path, node1) != node1]
def getfilectx(repo, memctx, f):
info = files.get(f)
if info is not None:
# it's a file reported as modified from Git
delete, mode, sha = info
if delete:
if getattr(memctx, '_returnnoneformissingfiles', False):
return None
else: # Mercurial < 3.2
raise IOError
if not sha: # indicates there's no git counterpart
e = ''
copied_path = None
if '.hgsubstate' == f:
data = util.serialize_hgsubstate(hgsubstate)
elif '.hgsub' == f:
data = util.serialize_hgsub(hgsub)
else:
data = self.git[sha].data
copied_path = renames.get(f)
e = self.convert_git_int_mode(mode)
else:
# it's a converged file
fc = context.filectx(self.repo, f, changeid=memctx.p1().rev())
data = fc.data()
e = fc.flags()
copied_path = None
copied = fc.renamed()
if copied:
copied_path = copied[0]
try:
return context.memfilectx(self.repo, f, data,
islink='l' in e,
isexec='x' in e,
copied=copied_path)
except TypeError:
return context.memfilectx(f, data,
islink='l' in e,
isexec='x' in e,
copied=copied_path)
p1, p2 = (nullid, nullid)
octopus = False
if len(gparents) > 1:
# merge, possibly octopus
def commit_octopus(p1, p2):
ctx = context.memctx(self.repo, (p1, p2), text, list(files) +
findconvergedfiles(p1, p2), getfilectx,
author, date, {'hg-git': 'octopus'})
# See comment below about setting substate to None.
ctx.substate = None
return hex(self.repo.commitctx(ctx))
octopus = len(gparents) > 2
p2 = gparents.pop()
p1 = gparents.pop()
while len(gparents) > 0:
p2 = commit_octopus(p1, p2)
p1 = gparents.pop()
else:
if gparents:
p1 = gparents.pop()
# if named branch, add to extra
if hg_branch:
extra['branch'] = hg_branch
# if committer is different than author, add it to extra
if commit.author != commit.committer \
or commit.author_time != commit.commit_time \
or commit.author_timezone != commit.commit_timezone:
extra['committer'] = "%s %d %d" % (
commit.committer, commit.commit_time, -commit.commit_timezone)
if commit.encoding:
extra['encoding'] = commit.encoding
if octopus:
extra['hg-git'] = 'octopus-done'
ctx = context.memctx(self.repo, (p1, p2), text,
list(files) + findconvergedfiles(p1, p2),
getfilectx, author, date, extra)
# Starting Mercurial commit d2743be1bb06, memctx imports from
# committablectx. This means that it has a 'substate' property that
# contains the subrepo state. Ordinarily, Mercurial expects the subrepo
# to be present while making a new commit -- since hg-git is importing
# purely in-memory commits without backing stores for the subrepos,
# that won't work. Forcibly set the substate to None so that there's no
# attempt to read subrepos.
ctx.substate = None
node = self.repo.commitctx(ctx)
self.swap_out_encoding(oldenc)
# save changeset to mapping file
cs = hex(node)
self.map_set(commit.id, cs)
# PACK UPLOADING AND FETCHING
def upload_pack(self, remote, revs, force):
client, path = self.get_transport_and_path(remote)
old_refs = {}
change_totals = {}
def changed(refs):
self.ui.status(_("searching for changes\n"))
old_refs.update(refs)
all_exportable = self.get_exportable()
if revs is None:
exportable = all_exportable
else:
exportable = {}
for rev in (hex(r) for r in revs):
if rev not in all_exportable:
raise hgutil.Abort("revision %s cannot be pushed since"
" it doesn't have a ref" %
self.repo[rev])
exportable[rev] = all_exportable[rev]
return self.get_changed_refs(refs, exportable, force)
def genpack(have, want):
commits = []
for mo in self.git.object_store.find_missing_objects(have, want):
(sha, name) = mo
o = self.git.object_store[sha]
t = type(o)
change_totals[t] = change_totals.get(t, 0) + 1
if isinstance(o, Commit):
commits.append(sha)
commit_count = len(commits)
self.ui.note(_("%d commits found\n") % commit_count)
if commit_count > 0:
self.ui.debug(_("list of commits:\n"))
for commit in commits:
self.ui.debug("%s\n" % commit)
self.ui.status(_("adding objects\n"))
return self.git.object_store.generate_pack_contents(have, want)
def callback(remote_info):
# dulwich (perhaps git?) wraps remote output at a fixed width but
# signifies the end of transmission with a double new line
global CALLBACK_BUFFER
if remote_info and not remote_info.endswith('\n\n'):
CALLBACK_BUFFER += remote_info
return
remote_info = CALLBACK_BUFFER + remote_info
CALLBACK_BUFFER = ''
if not remote_info:
remote_info = '\n'
for line in remote_info[:-1].split('\n'):
self.ui.status(_("remote: %s\n") % line)
try:
new_refs = client.send_pack(path, changed, genpack,
progress=callback)
if len(change_totals) > 0:
self.ui.status(_("added %d commits with %d trees"
" and %d blobs\n") %
(change_totals.get(Commit, 0),
change_totals.get(Tree, 0),
change_totals.get(Blob, 0)))
return old_refs, new_refs
except (HangupException, GitProtocolError), e:
raise hgutil.Abort(_("git remote error: ") + str(e))
def get_changed_refs(self, refs, exportable, force):
new_refs = refs.copy()
# The remote repo is empty and the local one doesn't have
# bookmarks/tags
#
# (older dulwich versions return the proto-level
# capabilities^{} key when the dict should have been
# empty. That check can probably be removed at some point in
# the future.)
if not refs or refs.keys()[0] == 'capabilities^{}':
if not exportable:
tip = self.repo.lookup('tip')
if tip != nullid:
if 'capabilities^{}' in new_refs:
del new_refs['capabilities^{}']
tip = hex(tip)
try:
commands.bookmark(self.ui, self.repo, 'master',
rev=tip, force=True)
except NameError:
bookmarks.bookmark(self.ui, self.repo, 'master',
rev=tip, force=True)
try:
bookmarks.activate(self.repo, 'master')
except AttributeError:
# hg < 3.5
bookmarks.setcurrent(self.repo, 'master')
new_refs['refs/heads/master'] = self.map_git_get(tip)
# mapped nodes might be hidden
unfiltered = self.repo.unfiltered()
for rev, rev_refs in exportable.iteritems():
ctx = self.repo[rev]
if not rev_refs:
raise hgutil.Abort("revision %s cannot be pushed since"
" it doesn't have a ref" % ctx)
# Check if the tags the server is advertising are annotated tags,
# by attempting to retrieve it from the our git repo, and building
# a list of these tags.
#
# This is possible, even though (currently) annotated tags are
# dereferenced and stored as lightweight ones, as the annotated tag
# is still stored in the git repo.
uptodate_annotated_tags = []
for ref in rev_refs.tags:
# Check tag.
if ref not in refs:
continue
try:
# We're not using Repo.tag(), as it's deprecated.
tag = self.git.get_object(refs[ref])
if not isinstance(tag, Tag):
continue
except KeyError:
continue
# If we've reached here, the tag's good.
uptodate_annotated_tags.append(ref)
for ref in rev_refs:
if ref not in refs:
new_refs[ref] = self.map_git_get(ctx.hex())
elif new_refs[ref] in self._map_git:
rctx = unfiltered[self.map_hg_get(new_refs[ref])]
if rctx.ancestor(ctx) == rctx or force:
new_refs[ref] = self.map_git_get(ctx.hex())
else:
raise hgutil.Abort("pushing %s overwrites %s"
% (ref, ctx))
elif ref in uptodate_annotated_tags:
# we already have the annotated tag.
pass
else:
raise hgutil.Abort(
"branch '%s' changed on the server, "
"please pull and merge before pushing" % ref)
return new_refs
def fetch_pack(self, remote_name, heads=None):
localclient, path = self.get_transport_and_path(remote_name)
# The dulwich default walk only checks refs/heads/. We also want to
# consider remotes when doing discovery, so we build our own list. We
# can't just do 'refs/' here because the tag class doesn't have a
# parents function for walking, and older versions of dulwich don't like
# that.
haveheads = self.git.refs.as_dict('refs/remotes/').values()
haveheads.extend(self.git.refs.as_dict('refs/heads/').values())
graphwalker = self.git.get_graph_walker(heads=haveheads)
def determine_wants(refs):
if refs is None:
return None
filteredrefs = self.filter_refs(refs, heads)
return [x for x in filteredrefs.itervalues() if x not in self.git]
try:
progress = GitProgress(self.ui)
f = StringIO.StringIO()
ret = localclient.fetch_pack(path, determine_wants, graphwalker,
f.write, progress.progress)
if(f.pos != 0):
f.seek(0)
self.git.object_store.add_thin_pack(f.read, None)
progress.flush()
# For empty repos dulwich gives us None, but since later
# we want to iterate over this, we really want an empty
# iterable
return ret if ret else {}
except (HangupException, GitProtocolError), e:
raise hgutil.Abort(_("git remote error: ") + str(e))
# REFERENCES HANDLING
def filter_refs(self, refs, heads):
'''For a dictionary of refs: shas, if heads is None then return refs
that match the heads. Otherwise, return refs that are heads or tags.
'''
filteredrefs = []
if heads is not None:
# contains pairs of ('refs/(heads|tags|...)/foo', 'foo')
# if ref is just '<foo>', then we get ('foo', 'foo')
stripped_refs = [(r, r[r.find('/', r.find('/') + 1) + 1:]) for r in
refs]
for h in heads:
if h.endswith('/*'):
prefix = h[:-1] # include the / but not the *
r = [pair[0] for pair in stripped_refs
if pair[1].startswith(prefix)]
r.sort()
filteredrefs.extend(r)
else:
r = [pair[0] for pair in stripped_refs if pair[1] == h]
if not r:
raise hgutil.Abort("ref %s not found on remote server"
% h)
elif len(r) == 1:
filteredrefs.append(r[0])
else:
raise hgutil.Abort("ambiguous reference %s: %r"
% (h, r))
else:
for ref, sha in refs.iteritems():
if (not ref.endswith('^{}') and
(ref.startswith('refs/heads/') or
ref.startswith('refs/tags/'))):
filteredrefs.append(ref)
filteredrefs.sort()
# the choice of OrderedDict vs plain dict has no impact on stock
# hg-git, but allows extensions to customize the order in which refs
# are returned
return util.OrderedDict((r, refs[r]) for r in filteredrefs)
def filter_min_date(self, refs):
'''filter refs by minimum date
This only works for refs that are available locally.'''
min_date = self.ui.config('git', 'mindate')
if min_date is None:
return refs
# filter refs older than min_timestamp
min_timestamp, min_offset = hgutil.parsedate(min_date)
def check_min_time(obj):
if isinstance(obj, Tag):
return obj.tag_time >= min_timestamp
else:
return obj.commit_time >= min_timestamp
return util.OrderedDict((ref, sha) for ref, sha in refs.iteritems()
if check_min_time(self.git[sha]))
def update_references(self):
exportable = self.get_exportable()
# Create a local Git branch name for each
# Mercurial bookmark.
for hg_sha, refs in exportable.iteritems():
for git_ref in refs.heads:
git_sha = self.map_git_get(hg_sha)
if git_sha:
self.git.refs[git_ref] = git_sha
def export_hg_tags(self):
for tag, sha in self.repo.tags().iteritems():
if self.repo.tagtype(tag) in ('global', 'git'):
tag = tag.replace(' ', '_')
target = self.map_git_get(hex(sha))
if target is not None:
tag_refname = 'refs/tags/' + tag
if(check_ref_format(tag_refname)):
self.git.refs[tag_refname] = target
self.tags[tag] = hex(sha)
else:
self.repo.ui.warn('Skipping export of tag %s because '
'it has invalid name as a git '
'refname.\n' % tag)
else:
self.repo.ui.warn(
'Skipping export of tag %s because it '
'has no matching git revision.\n' % tag)
def _filter_for_bookmarks(self, bms):
if not self.branch_bookmark_suffix:
return [(bm, bm) for bm in bms]
else:
def _filter_bm(bm):
if bm.endswith(self.branch_bookmark_suffix):
return bm[0:-(len(self.branch_bookmark_suffix))]
else:
return bm
return [(_filter_bm(bm), bm) for bm in bms]
def get_exportable(self):
class heads_tags(object):
def __init__(self):
self.heads = set()
self.tags = set()
def __iter__(self):
return itertools.chain(self.heads, self.tags)
def __nonzero__(self):
return bool(self.heads) or bool(self.tags)
res = collections.defaultdict(heads_tags)
bms = self.repo._bookmarks
for filtered_bm, bm in self._filter_for_bookmarks(bms):
res[hex(bms[bm])].heads.add('refs/heads/' + filtered_bm)
for tag, sha in self.tags.iteritems():
res[sha].tags.add('refs/tags/' + tag)
return res
def import_tags(self, refs):
keys = refs.keys()
if not keys:
return
repotags = self.repo.tags()
for k in keys[:]:
ref_name = k
parts = k.split('/')
if parts[0] == 'refs' and parts[1] == 'tags':
ref_name = "/".join([v for v in parts[2:]])
# refs contains all the refs in the server, not just
# the ones we are pulling
if refs[k] not in self.git.object_store:
continue
if ref_name[-3:] == '^{}':
ref_name = ref_name[:-3]
if ref_name not in repotags:
obj = self.git.get_object(refs[k])
sha = None
if isinstance(obj, Commit): # lightweight
sha = self.map_hg_get(refs[k])
if sha is not None:
self.tags[ref_name] = sha
elif isinstance(obj, Tag): # annotated
(obj_type, obj_sha) = obj.object
obj = self.git.get_object(obj_sha)
if isinstance(obj, Commit):
sha = self.map_hg_get(obj_sha)
# TODO: better handling for annotated tags
if sha is not None:
self.tags[ref_name] = sha
self.save_tags()
def update_hg_bookmarks(self, refs):
try:
bms = self.repo._bookmarks
heads = dict([(ref[11:], refs[ref]) for ref in refs
if ref.startswith('refs/heads/')])
suffix = self.branch_bookmark_suffix or ''
for head, sha in heads.iteritems():
# refs contains all the refs in the server, not just
# the ones we are pulling
hgsha = self.map_hg_get(sha)
if hgsha is None:
continue
hgsha = bin(hgsha)
if head not in bms:
# new branch
bms[head + suffix] = hgsha
else:
bm = self.repo[bms[head]]
if bm.ancestor(self.repo[hgsha]) == bm:
# fast forward
bms[head + suffix] = hgsha
if heads:
util.recordbookmarks(self.repo, bms)
except AttributeError:
self.ui.warn(_('creating bookmarks failed, do you have'
' bookmarks enabled?\n'))
def update_remote_branches(self, remote_name, refs):
remote_refs = self.remote_refs
# since we re-write all refs for this remote each time, prune
# all entries matching this remote from our refs list now so
# that we avoid any stale refs hanging around forever
for t in list(remote_refs):
if t.startswith(remote_name + '/'):
del remote_refs[t]
for ref_name, sha in refs.iteritems():
if ref_name.startswith('refs/heads'):
hgsha = self.map_hg_get(sha)
if hgsha is None or hgsha not in self.repo:
continue
head = ref_name[11:]
remote_refs['/'.join((remote_name, head))] = bin(hgsha)
# TODO(durin42): what is this doing?
new_ref = 'refs/remotes/%s/%s' % (remote_name, head)
self.git.refs[new_ref] = sha
elif (ref_name.startswith('refs/tags') and not
ref_name.endswith('^{}')):
self.git.refs[ref_name] = sha
# UTILITY FUNCTIONS
def convert_git_int_mode(self, mode):
# TODO: make these into constants
convert = {
0100644: '',
0100755: 'x',
0120000: 'l'
}
if mode in convert:
return convert[mode]
return ''
def get_file(self, commit, f):
otree = self.git.tree(commit.tree)
parts = f.split('/')
for part in parts:
(mode, sha) = otree[part]
obj = self.git.get_object(sha)
if isinstance(obj, Blob):
return (mode, sha, obj._text)
elif isinstance(obj, Tree):
otree = obj
def get_files_changed(self, commit, detect_renames):
tree = commit.tree
btree = None
if commit.parents:
btree = self.git[commit.parents[0]].tree
files = {}
gitlinks = {}
renames = None
rename_detector = None
if detect_renames:
renames = {}
rename_detector = self._rename_detector
# this set is unused if rename detection isn't enabled -- that makes
# the code below simpler
renamed_out = set()
changes = diff_tree.tree_changes(self.git.object_store, btree, tree,
rename_detector=rename_detector)
for change in changes:
oldfile, oldmode, oldsha = change.old
newfile, newmode, newsha = change.new
# actions are described by the following table ('no' means 'does
# not exist'):
# old new | action
# no file | record file
# no gitlink | record gitlink
# file no | delete file
# file file | record file
# file gitlink | delete file and record gitlink
# gitlink no | delete gitlink
# gitlink file | delete gitlink and record file
# gitlink gitlink | record gitlink
#
# There's an edge case here -- symlink <-> regular file transitions
# are returned by dulwich as separate deletes and adds, not
# modifications. The order of those results is unspecified and
# could be either way round. Handle both cases: delete first, then
# add -- delete stored in 'old = file' case, then overwritten by
# 'new = file' case. add first, then delete -- record stored in
# 'new = file' case, then membership check fails in 'old = file'
# case so is not overwritten there. This is not an issue for
# gitlink <-> {symlink, regular file} transitions because they
# write to separate dictionaries.
#
# There's a similar edge case when rename detection is enabled: if
# a file is renamed and then replaced by a symlink (typically to
# the new location), it is returned by dulwich as an add and a
# rename. The order of those results is unspecified. Handle both
# cases: rename first, then add -- delete stored in 'new = file'
# case with renamed_out, then renamed_out check passes in 'old =
# file' case so is overwritten. add first, then rename -- add
# stored in 'old = file' case, then membership check fails in 'new
# = file' case so is overwritten.
if newmode == 0160000:
# new = gitlink
gitlinks[newfile] = newsha
if change.type == diff_tree.CHANGE_RENAME:
# don't record the rename because only file -> file renames
# make sense in Mercurial
gitlinks[oldfile] = None
if oldmode is not None and oldmode != 0160000:
# file -> gitlink
files[oldfile] = True, None, None
continue
if oldmode == 0160000 and newmode != 0160000:
# gitlink -> no/file (gitlink -> gitlink is covered above)
gitlinks[oldfile] = None
continue
if newfile is not None:
self.audit_hg_path(newfile)
# new = file
files[newfile] = False, newmode, newsha
if renames is not None and newfile != oldfile:
renames[newfile] = oldfile
renamed_out.add(oldfile)
# the membership check is explained in a comment above
if (change.type == diff_tree.CHANGE_RENAME and
oldfile not in files):
files[oldfile] = True, None, None
else:
# old = file
# files renamed_out | action
# no * | write
# yes no | ignore
# yes yes | write
if oldfile not in files or oldfile in renamed_out:
files[oldfile] = True, None, None
return files, gitlinks, renames
@hgutil.propertycache
def _rename_detector(self):
# disabled by default to avoid surprises
similarity = self.ui.configint('git', 'similarity', default=0)
if similarity < 0 or similarity > 100:
raise util.Abort(_('git.similarity must be between 0 and 100'))
if similarity == 0:
return None
# default is borrowed from Git
max_files = self.ui.configint('git', 'renamelimit', default=400)
if similarity < 0:
raise util.Abort(_('git.renamelimit must be non-negative'))
if max_files == 0:
max_files = None
find_copies_harder = self.ui.configbool('git', 'findcopiesharder',
default=False)
return diff_tree.RenameDetector(self.git.object_store,
rename_threshold=similarity,
max_files=max_files,
find_copies_harder=find_copies_harder)
def parse_gitmodules(self, tree_obj):
"""Parse .gitmodules from a git tree specified by tree_obj
:return: list of tuples (submodule path, url, name),
where name is quoted part of the section's name, or
empty list if nothing found
"""
rv = []
try:
unused_mode, gitmodules_sha = tree_obj['.gitmodules']
except KeyError:
return rv
gitmodules_content = self.git[gitmodules_sha].data
fo = StringIO.StringIO(gitmodules_content)
tt = dul_config.ConfigFile.from_file(fo)
for section in tt.keys():
section_kind, section_name = section
if section_kind == 'submodule':
sm_path = tt.get(section, 'path')
sm_url = tt.get(section, 'url')
rv.append((sm_path, sm_url, section_name))
return rv
def git_file_readlines(self, tree_obj, fname):
"""Read content of a named entry from the git commit tree
:return: list of lines
"""
if fname in tree_obj:
unused_mode, sha = tree_obj[fname]
content = self.git[sha].data
return content.splitlines()
return []
def remote_name(self, remote):
names = [name for name, path in self.paths if path == remote]
if names:
return names[0]
def audit_hg_path(self, path):
if '.hg' in path.split(os.path.sep):
if self.ui.configbool('git', 'blockdothg', True):
raise hgutil.Abort(
('Refusing to import problematic path %r' % path),
hint=("Mercurial cannot check out paths inside nested " +
"repositories; if you need to continue, then set " +
"'[git] blockdothg = false' in your hgrc."))
self.ui.warn(('warning: path %r is within a nested repository, ' +
'which Mercurial cannot check out.\n')
% path)
# Stolen from hgsubversion
def swap_out_encoding(self, new_encoding='UTF-8'):
try:
from mercurial import encoding
old = encoding.encoding
encoding.encoding = new_encoding
except (AttributeError, ImportError):
old = hgutil._encoding
hgutil._encoding = new_encoding
return old
def decode_guess(self, string, encoding):
# text is not valid utf-8, try to make sense of it
if encoding:
try:
return string.decode(encoding).encode('utf-8')
except UnicodeDecodeError:
pass
try:
return string.decode('latin-1').encode('utf-8')
except UnicodeDecodeError:
return string.decode('ascii', 'replace').encode('utf-8')
def get_transport_and_path(self, uri):
"""Method that sets up the transport (either ssh or http(s))
Tests:
>>> from dulwich.client import HttpGitClient, SSHGitClient
>>> from mercurial.ui import ui
>>> g = GitHandler('', ui())
>>> client, url = g.get_transport_and_path('http://fqdn.com/test.git')
>>> print isinstance(client, HttpGitClient)
True
>>> print url
http://fqdn.com/test.git
>>> client, url = g.get_transport_and_path('git@fqdn.com:user/repo.git')
>>> print isinstance(client, SSHGitClient)
True
>>> print url
user/repo.git
>>> print client.host
git@fqdn.com
"""
# pass hg's ui.ssh config to dulwich
if not issubclass(client.get_ssh_vendor, _ssh.SSHVendor):
client.get_ssh_vendor = _ssh.generate_ssh_vendor(self.ui)
# test for raw git ssh uri here so that we can reuse the logic below
if util.isgitsshuri(uri):
uri = "git+ssh://" + uri
git_match = RE_GIT_URI.match(uri)
if git_match:
res = git_match.groupdict()
transport = client.TCPGitClient
if 'ssh' in res['scheme']:
transport = client.SSHGitClient
host, port, sepr = res['host'], res['port'], res['sepr']
path = res['path']
if sepr == '/' and not path.startswith('~'):
path = '/' + path
# strip trailing slash for heroku-style URLs
# ssh+git://git@heroku.com:project.git/
if sepr == ':' and path.endswith('.git/'):
path = path.rstrip('/')
if port:
client.port = port
return transport(host, port=port), path
if uri.startswith('git+http://') or uri.startswith('git+https://'):
uri = uri[4:]
if uri.startswith('http://') or uri.startswith('https://'):
auth = urllib2.HTTPBasicAuthHandler(url.passwordmgr(self.ui))
opener = urllib2.build_opener(auth)
ua = 'git/20x6 (hg-git ; uses dulwich and hg ; like git-core)'
opener.addheaders = [('User-Agent', ua)]
try:
return client.HttpGitClient(uri, opener=opener), uri
except TypeError as e:
if e.message.find("unexpected keyword argument 'opener'") >= 0:
# Dulwich 0.9.4, which is the latest version that ships
# with Ubuntu 14.04, doesn't support the 'opener' keyword.
# Try without authentication.
return client.HttpGitClient(uri), uri
else:
raise
# if its not git or git+ssh, try a local url..
return client.SubprocessGitClient(), uri