view sat/plugins/plugin_merge_req_mercurial.py @ 3153:2c7b42f53e9a

core (xmpp): avoid starting several clients at the same time: a check is done to avoid running startConnection several times at once, which would lead to the creation of several SatXMPPEntity instances at the same time, resulting in many issues. If startConnection is called while a previous one is not finished yet, a CancelError is now raised.
author Goffi <goffi@goffi.org>
date Mon, 03 Feb 2020 13:46:24 +0100
parents 559a625a236b
children e86b71b1aa31
line wrap: on
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#!/usr/bin/env python3


# SàT plugin for import external blogs
# Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import re
from twisted.python.procutils import which
from sat.tools.common import async_process
from sat.tools import utils
from sat.core.i18n import _, D_
from sat.core.constants import Const as C
from sat.core import exceptions
from sat.core.log import getLogger
log = getLogger(__name__)


PLUGIN_INFO = {
    C.PI_NAME: "Mercurial Merge Request handler",
    C.PI_IMPORT_NAME: "MERGE_REQUEST_MERCURIAL",
    C.PI_TYPE: C.PLUG_TYPE_MISC,
    C.PI_DEPENDENCIES: ["MERGE_REQUESTS"],
    C.PI_MAIN: "MercurialHandler",
    C.PI_HANDLER: "no",
    C.PI_DESCRIPTION: _("""Merge request handler for Mercurial""")
}

SHORT_DESC = D_("handle Mercurial repository")
CLEAN_RE = re.compile(r'[^\w -._]', flags=re.UNICODE)


class MercurialProtocol(async_process.CommandProtocol):
    """handle hg commands"""
    name = "Mercurial"
    command = None

    @classmethod
    def run(cls, path, command, *args, **kwargs):
        """Create a new MercurialRegisterProtocol and execute the given mercurial command.

        @param path(unicode): path to the repository
        @param command(unicode): hg command to run
        @return D(bytes): stdout of the command
        """
        assert "path" not in kwargs
        kwargs["path"] = path
        # FIXME: we have to use this workaround because Twisted's protocol.ProcessProtocol
        #        is not using new style classes. This can be removed once moved to
        #        Python 3 (super can be used normally then).
        d = async_process.CommandProtocol.run.__func__(cls, command, *args, **kwargs)
        d.addErrback(utils.logError)
        return d


class MercurialHandler(object):
    data_types = ('mercurial_changeset',)

    def __init__(self, host):
        log.info(_("Mercurial merge request handler initialization"))
        try:
            MercurialProtocol.command = which('hg')[0]
        except IndexError:
            raise exceptions.NotFound(_("Mercurial executable (hg) not found, "
                                        "can't use Mercurial handler"))
        self.host = host
        self._m = host.plugins['MERGE_REQUESTS']
        self._m.register('mercurial', self, self.data_types, SHORT_DESC)


    def check(self, repository):
        d = MercurialProtocol.run(repository, 'identify')
        d.addCallback(lambda __: True)
        d.addErrback(lambda __: False)
        return d

    def export(self, repository):
        d = MercurialProtocol.run(repository, 'export', '-g', '-r', 'outgoing()',
                                  '--encoding=utf-8')
        d.addCallback(lambda data: data.decode('utf-8'))
        return d

    def import_(self, repository, data, data_type, item_id, service, node, extra):
        parsed_data = self.parse(data)
        try:
            parsed_name = parsed_data[0]['commit_msg'].split('\n')[0]
            parsed_name = CLEAN_RE.sub('', parsed_name)[:40]
        except Exception:
            parsed_name = ''
        name = 'mr_{item_id}_{parsed_name}'.format(item_id=CLEAN_RE.sub('', item_id),
                                                   parsed_name=parsed_name)
        return MercurialProtocol.run(repository, 'qimport', '-g', '--name', name,
                                     '--encoding=utf-8', '-', stdin=data)

    def parse(self, data, data_type=None):
        lines = data.splitlines()
        total_lines = len(lines)
        patches = []
        while lines:
            patch = {}
            commit_msg = []
            diff = []
            state = 'init'
            if lines[0] != '# HG changeset patch':
                raise exceptions.DataError(_('invalid changeset signature'))
            # line index of this patch in the whole data
            patch_idx = total_lines - len(lines)
            del lines[0]

            for idx, line in enumerate(lines):
                if state == 'init':
                    if line.startswith('# '):
                        if line.startswith('# User '):
                            elems = line[7:].split()
                            if not elems:
                                continue
                            last = elems[-1]
                            if (last.startswith('<') and last.endswith('>')
                                and '@' in last):
                                patch[self._m.META_EMAIL] = elems.pop()[1:-1]
                            patch[self._m.META_AUTHOR] = ' '.join(elems)
                        elif line.startswith('# Date '):
                            time_data = line[7:].split()
                            if len(time_data) != 2:
                                log.warning(_('unexpected time data: {data}')
                                            .format(data=line[7:]))
                                continue
                            patch[self._m.META_TIMESTAMP] = (int(time_data[0])
                                                             + int(time_data[1]))
                        elif line.startswith('# Node ID '):
                            patch[self._m.META_HASH] = line[10:]
                        elif line.startswith('# Parent  '):
                            patch[self._m.META_PARENT_HASH] = line[10:]
                    else:
                        state = 'commit_msg'
                if state == 'commit_msg':
                    if line.startswith('diff --git a/'):
                        state = 'diff'
                        patch[self._m.META_DIFF_IDX] = patch_idx + idx + 1
                    else:
                        commit_msg.append(line)
                if state == 'diff':
                    if line.startswith('# ') or idx == len(lines)-1:
                        # a new patch is starting or we have reached end of patches
                        if idx == len(lines)-1:
                            # end of patches, we need to keep the line
                            diff.append(line)
                        patch[self._m.META_COMMIT_MSG] = '\n'.join(commit_msg)
                        patch[self._m.META_DIFF] = '\n'.join(diff)
                        patches.append(patch)
                        if idx == len(lines)-1:
                            del lines[:]
                        else:
                            del lines[:idx]
                        break
                    else:
                        diff.append(line)
        return patches