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Differential Revision: https://phab.mercurial-scm.org/D10674
# darcs.py - darcs support for the convert extension
#
# Copyright 2007-2009 Olivia Mackall <olivia@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import errno
import os
import re
import shutil
from mercurial.i18n import _
from mercurial import (
error,
pycompat,
util,
)
from mercurial.utils import dateutil
from . import common
NoRepo = common.NoRepo
# The naming drift of ElementTree is fun!
try:
import xml.etree.cElementTree.ElementTree as ElementTree
import xml.etree.cElementTree.XMLParser as XMLParser
except ImportError:
try:
import xml.etree.ElementTree.ElementTree as ElementTree
import xml.etree.ElementTree.XMLParser as XMLParser
except ImportError:
try:
import elementtree.cElementTree.ElementTree as ElementTree
import elementtree.cElementTree.XMLParser as XMLParser
except ImportError:
try:
import elementtree.ElementTree.ElementTree as ElementTree
import elementtree.ElementTree.XMLParser as XMLParser
except ImportError:
pass
class darcs_source(common.converter_source, common.commandline):
def __init__(self, ui, repotype, path, revs=None):
common.converter_source.__init__(self, ui, repotype, path, revs=revs)
common.commandline.__init__(self, ui, b'darcs')
# check for _darcs, ElementTree so that we can easily skip
# test-convert-darcs if ElementTree is not around
if not os.path.exists(os.path.join(path, b'_darcs')):
raise NoRepo(_(b"%s does not look like a darcs repository") % path)
common.checktool(b'darcs')
version = self.run0(b'--version').splitlines()[0].strip()
if version < b'2.1':
raise error.Abort(
_(b'darcs version 2.1 or newer needed (found %r)') % version
)
if b"ElementTree" not in globals():
raise error.Abort(_(b"Python ElementTree module is not available"))
self.path = os.path.realpath(path)
self.lastrev = None
self.changes = {}
self.parents = {}
self.tags = {}
# Check darcs repository format
format = self.format()
if format:
if format in (b'darcs-1.0', b'hashed'):
raise NoRepo(
_(
b"%s repository format is unsupported, "
b"please upgrade"
)
% format
)
else:
self.ui.warn(_(b'failed to detect repository format!'))
def before(self):
self.tmppath = pycompat.mkdtemp(
prefix=b'convert-' + os.path.basename(self.path) + b'-'
)
output, status = self.run(b'init', repodir=self.tmppath)
self.checkexit(status)
tree = self.xml(
b'changes', xml_output=True, summary=True, repodir=self.path
)
tagname = None
child = None
for elt in tree.findall(b'patch'):
node = elt.get(b'hash')
name = elt.findtext(b'name', b'')
if name.startswith(b'TAG '):
tagname = name[4:].strip()
elif tagname is not None:
self.tags[tagname] = node
tagname = None
self.changes[node] = elt
self.parents[child] = [node]
child = node
self.parents[child] = []
def after(self):
self.ui.debug(b'cleaning up %s\n' % self.tmppath)
shutil.rmtree(self.tmppath, ignore_errors=True)
def recode(self, s, encoding=None):
if isinstance(s, pycompat.unicode):
# XMLParser returns unicode objects for anything it can't
# encode into ASCII. We convert them back to str to get
# recode's normal conversion behavior.
s = s.encode('latin-1')
return super(darcs_source, self).recode(s, encoding)
def xml(self, cmd, **kwargs):
# NOTE: darcs is currently encoding agnostic and will print
# patch metadata byte-for-byte, even in the XML changelog.
etree = ElementTree()
# While we are decoding the XML as latin-1 to be as liberal as
# possible, etree will still raise an exception if any
# non-printable characters are in the XML changelog.
parser = XMLParser(encoding=b'latin-1')
p = self._run(cmd, **kwargs)
etree.parse(p.stdout, parser=parser)
p.wait()
self.checkexit(p.returncode)
return etree.getroot()
def format(self):
output, status = self.run(b'show', b'repo', repodir=self.path)
self.checkexit(status)
m = re.search(r'^\s*Format:\s*(.*)$', output, re.MULTILINE)
if not m:
return None
return b','.join(sorted(f.strip() for f in m.group(1).split(b',')))
def manifest(self):
man = []
output, status = self.run(
b'show', b'files', no_directories=True, repodir=self.tmppath
)
self.checkexit(status)
for line in output.split(b'\n'):
path = line[2:]
if path:
man.append(path)
return man
def getheads(self):
return self.parents[None]
def getcommit(self, rev):
elt = self.changes[rev]
dateformat = b'%a %b %d %H:%M:%S %Z %Y'
date = dateutil.strdate(elt.get(b'local_date'), dateformat)
desc = elt.findtext(b'name') + b'\n' + elt.findtext(b'comment', b'')
# etree can return unicode objects for name, comment, and author,
# so recode() is used to ensure str objects are emitted.
newdateformat = b'%Y-%m-%d %H:%M:%S %1%2'
return common.commit(
author=self.recode(elt.get(b'author')),
date=dateutil.datestr(date, newdateformat),
desc=self.recode(desc).strip(),
parents=self.parents[rev],
)
def pull(self, rev):
output, status = self.run(
b'pull',
self.path,
all=True,
match=b'hash %s' % rev,
no_test=True,
no_posthook=True,
external_merge=b'/bin/false',
repodir=self.tmppath,
)
if status:
if output.find(b'We have conflicts in') == -1:
self.checkexit(status, output)
output, status = self.run(b'revert', all=True, repodir=self.tmppath)
self.checkexit(status, output)
def getchanges(self, rev, full):
if full:
raise error.Abort(_(b"convert from darcs does not support --full"))
copies = {}
changes = []
man = None
for elt in self.changes[rev].find(b'summary').getchildren():
if elt.tag in (b'add_directory', b'remove_directory'):
continue
if elt.tag == b'move':
if man is None:
man = self.manifest()
source, dest = elt.get(b'from'), elt.get(b'to')
if source in man:
# File move
changes.append((source, rev))
changes.append((dest, rev))
copies[dest] = source
else:
# Directory move, deduce file moves from manifest
source = source + b'/'
for f in man:
if not f.startswith(source):
continue
fdest = dest + b'/' + f[len(source) :]
changes.append((f, rev))
changes.append((fdest, rev))
copies[fdest] = f
else:
changes.append((elt.text.strip(), rev))
self.pull(rev)
self.lastrev = rev
return sorted(changes), copies, set()
def getfile(self, name, rev):
if rev != self.lastrev:
raise error.Abort(_(b'internal calling inconsistency'))
path = os.path.join(self.tmppath, name)
try:
data = util.readfile(path)
mode = os.lstat(path).st_mode
except IOError as inst:
if inst.errno == errno.ENOENT:
return None, None
raise
mode = (mode & 0o111) and b'x' or b''
return data, mode
def gettags(self):
return self.tags