hgext/convert/darcs.py
author Gilles Moris <gilles.moris@free.fr>
Fri, 06 Nov 2009 09:26:29 +0100
changeset 9809 ce145bf2ca5e
parent 9712 18b134ef294c
child 10263 25e572394f5c
permissions -rw-r--r--
buildrpm: build from working dir parent and use hg version for RPM versioning Previous, RPMs was always built from tip, and the release number did not match the 'hg version' put in place for 1.4. This will enable also to this script to be able to build official tag and not only nightly build.

# darcs.py - darcs support for the convert extension
#
#  Copyright 2007-2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.

from common import NoRepo, checktool, commandline, commit, converter_source
from mercurial.i18n import _
from mercurial import util
import os, shutil, tempfile

# The naming drift of ElementTree is fun!

try: from xml.etree.cElementTree import ElementTree
except ImportError:
    try: from xml.etree.ElementTree import ElementTree
    except ImportError:
        try: from elementtree.cElementTree import ElementTree
        except ImportError:
            try: from elementtree.ElementTree import ElementTree
            except ImportError: ElementTree = None


class darcs_source(converter_source, commandline):
    def __init__(self, ui, path, rev=None):
        converter_source.__init__(self, ui, path, rev=rev)
        commandline.__init__(self, ui, 'darcs')

        # check for _darcs, ElementTree, _darcs/inventory so that we can
        # easily skip test-convert-darcs if ElementTree is not around
        if not os.path.exists(os.path.join(path, '_darcs', 'inventories')):
            raise NoRepo("%s does not look like a darcs repo" % path)

        if not os.path.exists(os.path.join(path, '_darcs')):
            raise NoRepo("%s does not look like a darcs repo" % path)

        checktool('darcs')
        version = self.run0('--version').splitlines()[0].strip()
        if version < '2.1':
            raise util.Abort(_('darcs version 2.1 or newer needed (found %r)') %
                             version)

        if ElementTree is None:
            raise util.Abort(_("Python ElementTree module is not available"))

        self.path = os.path.realpath(path)

        self.lastrev = None
        self.changes = {}
        self.parents = {}
        self.tags = {}

    def before(self):
        self.tmppath = tempfile.mkdtemp(
            prefix='convert-' + os.path.basename(self.path) + '-')
        output, status = self.run('init', repodir=self.tmppath)
        self.checkexit(status)

        tree = self.xml('changes', xml_output=True, summary=True,
                        repodir=self.path)
        tagname = None
        child = None
        for elt in tree.findall('patch'):
            node = elt.get('hash')
            name = elt.findtext('name', '')
            if name.startswith('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('cleaning up %s\n' % self.tmppath)
        shutil.rmtree(self.tmppath, ignore_errors=True)

    def xml(self, cmd, **kwargs):
        etree = ElementTree()
        fp = self._run(cmd, **kwargs)
        etree.parse(fp)
        self.checkexit(fp.close())
        return etree.getroot()

    def manifest(self):
        man = []
        output, status = self.run('show', 'files', no_directories=True,
                                  repodir=self.tmppath)
        self.checkexit(status)
        for line in output.split('\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]
        date = util.strdate(elt.get('local_date'), '%a %b %d %H:%M:%S %Z %Y')
        desc = elt.findtext('name') + '\n' + elt.findtext('comment', '')
        return commit(author=elt.get('author'), date=util.datestr(date),
                      desc=desc.strip(), parents=self.parents[rev])

    def pull(self, rev):
        output, status = self.run('pull', self.path, all=True,
                                  match='hash %s' % rev,
                                  no_test=True, no_posthook=True,
                                  external_merge='/bin/false',
                                  repodir=self.tmppath)
        if status:
            if output.find('We have conflicts in') == -1:
                self.checkexit(status, output)
            output, status = self.run('revert', all=True, repodir=self.tmppath)
            self.checkexit(status, output)

    def getchanges(self, rev):
        copies = {}
        changes = []
        man = None
        for elt in self.changes[rev].find('summary').getchildren():
            if elt.tag in ('add_directory', 'remove_directory'):
                continue
            if elt.tag == 'move':
                if man is None:
                    man = self.manifest()
                source, dest = elt.get('from'), elt.get('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 + '/'
                    for f in man:
                        if not f.startswith(source):
                            continue
                        fdest = dest + '/' + 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

    def getfile(self, name, rev):
        if rev != self.lastrev:
            raise util.Abort(_('internal calling inconsistency'))
        return open(os.path.join(self.tmppath, name), 'rb').read()

    def getmode(self, name, rev):
        mode = os.lstat(os.path.join(self.tmppath, name)).st_mode
        return (mode & 0111) and 'x' or ''

    def gettags(self):
        return self.tags