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