view libervia/backend/plugins/plugin_merge_req_mercurial.py @ 4094:c3b68fdc2de7

component AP gateway: fix handling of XMPP comments authors: the gateway was supposing that comments where emitted from PEP of author. While this is the case for most blog posts, it's not for comments. Instead the component is now using `author_jid` which is retrieved by XEP-0277 plugin, and reject the item if the auhor is not verified (i.e. if `publisher` attribute is not set by XMPP service).
author Goffi <goffi@goffi.org>
date Mon, 12 Jun 2023 14:50:43 +0200
parents 4b842c1fb686
children 0d7bb4df2343
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#!/usr/bin/env python3

# SàT plugin managing Mercurial VCS
# Copyright (C) 2009-2021 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 libervia.backend.tools.common import async_process
from libervia.backend.tools import utils
from libervia.backend.core.i18n import _, D_
from libervia.backend.core.constants import Const as C
from libervia.backend.core import exceptions
from libervia.backend.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() and ancestors(.)',
            '--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