Mercurial > libervia-backend

annotate src/plugins/plugin_merge_req_mercurial.py @ 2449:67942ba2ee55

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plugin merge requests Mercurial: first draft: this plugin handle Mercurial VCS. It send merge requests using export command, and parse it to retrieve individual patches and metadata.
author Goffi <goffi@goffi.org>
date Thu, 30 Nov 2017 20:49:20 +0100
parents
children 0046283a285d
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SàT plugin for import external blogs
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5 # Copyright (C) 2009-2017 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import _, D_
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21 from sat.core.constants import Const as C
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22 from sat.core import exceptions
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23 from twisted.internet import reactor, defer, protocol
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24 from twisted.python.failure import Failure
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25 from twisted.python.procutils import which
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26 from sat.core.log import getLogger
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27 log = getLogger(__name__)
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28
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29
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30 PLUGIN_INFO = {
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31 C.PI_NAME: "Mercurial Merge Request handler",
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32 C.PI_IMPORT_NAME: "MERGE_REQUEST_MERCURIAL",
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33 C.PI_TYPE: C.PLUG_TYPE_MISC,
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34 C.PI_DEPENDENCIES: ["MERGE_REQUESTS"],
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35 C.PI_MAIN: "MercurialHandler",
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36 C.PI_HANDLER: "no",
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37 C.PI_DESCRIPTION: _(u"""Merge request handler for Mercurial""")
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38 }
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39
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40 SHORT_DESC = D_(u"handle Mercurial repository")
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41
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42
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43 class MercurialProtocol(protocol.ProcessProtocol):
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44 """handle hg commands"""
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45 hg = None
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46
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47 def __init__(self, deferred):
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48 self._deferred = deferred
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49 self.data = []
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50
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51 def outReceived(self, data):
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52 self.data.append(data)
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53
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54 def errReceived(self, data):
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55 self.data.append(data)
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56
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57 def processEnded(self, reason):
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58 data = u''.join([d.decode('utf-8') for d in self.data])
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59 if (reason.value.exitCode == 0):
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60 log.debug(_('Mercurial command succeed'))
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61 self._deferred.callback(data)
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62 else:
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63 log.error(_(u"Can't complete Mercurial command (error code: {code}): {message}").format(
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64 code = reason.value.exitCode,
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65 message = data))
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66 self._deferred.errback(Failure(RuntimeError))
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67
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68 @classmethod
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69 def run(cls, path, command, *args):
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70 """Create a new MercurialRegisterProtocol and execute the given mercurialctl command.
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71
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72 @param path(unicode): path to the repository
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73 @param command(unicode): command to run
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74 @param *args(unicode): command arguments
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75 @return ((D)):
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76 """
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77 d = defer.Deferred()
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78 mercurial_prot = MercurialProtocol(d)
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79 cmd_args = [cls.hg, command.encode('utf-8')]
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80 cmd_args.extend([a.encode('utf-8') for a in args])
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81 reactor.spawnProcess(mercurial_prot,
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82 cls.hg,
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83 cmd_args,
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84 path=path.encode('utf-8'))
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85 return d
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86
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87
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88 class MercurialHandler(object):
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89
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90 def __init__(self, host):
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91 log.info(_(u"Mercurial merge request handler initialization"))
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92 try:
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93 MercurialProtocol.hg = which('hg')[0]
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94 except IndexError:
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95 raise exceptions.NotFound(_(u"Mercurial executable (hg) not found, can't use Mercurial handler"))
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96 self.host = host
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97 self._m = host.plugins['MERGE_REQUESTS']
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98 self._m.register('mercurial', self, [u'mercurial_changeset'], SHORT_DESC)
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99
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100 def check(self, repository):
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101 d = MercurialProtocol.run(repository, 'identify')
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102 d.addCallback(lambda dummy: True)
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103 d.addErrback(lambda dummy: False)
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104 return d
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105
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106 def export(self, repository):
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107 return MercurialProtocol.run(repository, 'export', '-g', '-r', 'outgoing()', '--encoding=utf-8')
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108
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109 def parse(self, data, data_type=None):
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110 lines = data.splitlines()
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111 total_lines = len(lines)
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112 patches = []
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113 while lines:
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114 patch = {}
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115 commit_msg = []
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116 diff = []
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117 state = 'init'
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118 if lines[0] != '# HG changeset patch':
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119 raise exceptions.DataError(_(u'invalid changeset signature'))
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120 # line index of this patch in the whole data
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121 patch_idx = total_lines - len(lines)
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122 del lines[0]
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123
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124 for idx, line in enumerate(lines):
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125 if state == 'init':
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126 if line.startswith(u'# '):
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127 if line.startswith(u'# User '):
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128 elems = line[7:].split()
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129 if not elems:
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130 continue
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131 last = elems[-1]
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132 if last.startswith(u'<') and last.endswith(u'>') and u'@' in last:
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133 patch[self._m.META_EMAIL] = elems.pop()[1:-1]
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134 patch[self._m.META_AUTHOR] = u' '.join(elems)
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135 elif line.startswith(u'# Date '):
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136 time_data = line[7:].split()
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137 if len(time_data) != 2:
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138 log.warning(_(u'unexpected time data: {data}').format(data=line[7:]))
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139 continue
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140 patch[self._m.META_TIMESTAMP] = int(time_data[0]) + int(time_data[1])
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141 elif line.startswith(u'# Node ID '):
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142 patch[self._m.META_HASH] = line[10:]
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143 elif line.startswith(u'# Parent '):
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144 patch[self._m.META_PARENT_HASH] = line[10:]
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145 else:
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146 state = 'commit_msg'
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147 if state == 'commit_msg':
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148 if line.startswith(u'diff --git a/'):
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149 state = 'diff'
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150 patch[self._m.META_DIFF_IDX] = patch_idx + idx + 1
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151 else:
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152 commit_msg.append(line)
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153 if state == 'diff':
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154 if line.startswith(u'# ') or idx == len(lines)-1:
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155 # a new patch is starting or we have reached end of patches
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156 patch[self._m.META_COMMIT_MSG] = u'\n'.join(commit_msg)
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157 patch[self._m.META_DIFF] = u'\n'.join(diff)
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158 patches.append(patch)
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159 if idx == len(lines)-1:
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160 del lines[:]
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161 else:
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162 del lines[:idx]
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163 break
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164 else:
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165 diff.append(line)
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166 return patches