view sat/plugins/plugin_merge_req_mercurial.py @ 2646:712cb4ff3e13

core: new EncryptionHandler class which manage encrypted session as a core feature: Plugin handling encryption can now register using host.registerEncryptionPlugin, and an encryption session can now be started using messageEncryptionStart bridge method. This will make encryption handling more easy, as we now know if a session is clear or e2e encrypted, and which plugin handle it.
author Goffi <goffi@goffi.org>
date Sun, 29 Jul 2018 19:22:56 +0200
parents 163aab916bcf
children 378188abe941
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SàT plugin for import external blogs
# Copyright (C) 2009-2018 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/>.

from sat.core.i18n import _, D_
from sat.core.constants import Const as C
from sat.core import exceptions
from twisted.internet import reactor, defer, protocol
from twisted.python.failure import Failure
from twisted.python.procutils import which
import re
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: _(u"""Merge request handler for Mercurial""")
}

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


class MercurialProtocol(protocol.ProcessProtocol):
    """handle hg commands"""
    hg = None

    def __init__(self, deferred, stdin=None):
        """
        @param deferred(defer.Deferred): will be called when command is completed
        @param stdin(str, None): if not None, will be push to standard input
        """
        self._stdin = stdin
        self._deferred = deferred
        self.data = []

    def connectionMade(self):
        if self._stdin is not None:
            self.transport.write(self._stdin)
            self.transport.closeStdin()

    def outReceived(self, data):
        self.data.append(data)

    def errReceived(self, data):
        self.data.append(data)

    def processEnded(self, reason):
        data = u''.join([d.decode('utf-8') for d in self.data])
        if (reason.value.exitCode == 0):
            log.debug(_('Mercurial command succeed'))
            self._deferred.callback(data)
        else:
            msg = (_(u"Can't complete Mercurial command (error code: {code}): {message}")
                   .format(code = reason.value.exitCode, message = data))
            log.warning(msg)
            self._deferred.errback(Failure(RuntimeError(msg)))

    @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): command to run
        @param *args(unicode): command arguments
        @param **kwargs: used because Python2 doesn't handle normal kw args after *args
            can only be:
            - stdin(unicode, None): data to push to standard input
        @return ((D)):
        """
        stdin = kwargs.pop('stdin', None)
        if kwargs:
            raise exceptions.InternalError(u'only stdin is allowed as keyword argument')
        if stdin is not None:
            stdin = stdin.encode('utf-8')
        d = defer.Deferred()
        mercurial_prot = MercurialProtocol(d, stdin=stdin)
        cmd_args = [cls.hg, command.encode('utf-8')]
        cmd_args.extend([a.encode('utf-8') for a in args])
        reactor.spawnProcess(mercurial_prot,
                             cls.hg,
                             cmd_args,
                             path=path.encode('utf-8'))
        return d


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

    def __init__(self, host):
        log.info(_(u"Mercurial merge request handler initialization"))
        try:
            MercurialProtocol.hg = which('hg')[0]
        except IndexError:
            raise exceptions.NotFound(_(u"Mercurial executable (hg) not found, "
                                        u"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 dummy: True)
        d.addErrback(lambda dummy: False)
        return d

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

    def import_(self, repository, data, data_type, item_id, service, node, extra):
        parsed_data = self.parse(data)
        try:
            parsed_name = parsed_data[0][u'commit_msg'].split(u'\n')[0]
            parsed_name = CLEAN_RE.sub(u'', parsed_name)[:40]
        except Exception:
            parsed_name = u''
        name = u'mr_{item_id}_{parsed_name}'.format(item_id=CLEAN_RE.sub(u'', 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(_(u'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(u'# '):
                        if line.startswith(u'# User '):
                            elems = line[7:].split()
                            if not elems:
                                continue
                            last = elems[-1]
                            if (last.startswith(u'<') and last.endswith(u'>')
                                and u'@' in last):
                                patch[self._m.META_EMAIL] = elems.pop()[1:-1]
                            patch[self._m.META_AUTHOR] = u' '.join(elems)
                        elif line.startswith(u'# Date '):
                            time_data = line[7:].split()
                            if len(time_data) != 2:
                                log.warning(_(u'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(u'# Node ID '):
                            patch[self._m.META_HASH] = line[10:]
                        elif line.startswith(u'# Parent  '):
                            patch[self._m.META_PARENT_HASH] = line[10:]
                    else:
                        state = 'commit_msg'
                if state == 'commit_msg':
                    if line.startswith(u'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(u'# ') 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] = u'\n'.join(commit_msg)
                        patch[self._m.META_DIFF] = u'\n'.join(diff)
                        patches.append(patch)
                        if idx == len(lines)-1:
                            del lines[:]
                        else:
                            del lines[:idx]
                        break
                    else:
                        diff.append(line)
        return patches