view sat/plugins/plugin_merge_req_mercurial.py @ 3372:5d926c7b0d99

plugin app manager: first draft: /!\ new optional dependency: pyyaml this plugin manage the life cycle of external applications. Application handlers register to it. Data needed to launch an application as set in YAML files. Local data types are used to get values directly from SàT: - !sat_conf to retrieve a configuration value - !sat_generate_pwd to generate a password - !sat_param for parameters specified a launch Data can be exposed when an instance is launched, this can be used to specify the port (notably the one used for web), or a generated password.
author Goffi <goffi@goffi.org>
date Mon, 28 Sep 2020 21:10:30 +0200
parents e86b71b1aa31
children be6d91572633
line wrap: on
line source

#!/usr/bin/env python3

# SàT plugin managing Mercurial VCS
# 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