Mercurial > evolve
annotate src/topic/__init__.py @ 1888:dfaf0de6f4d8
topicmap: move the monkey patching into a context manager
There is a couple of other place doing branchmap/topicmap update (of the served
set), we'll have to set the monkey patching for them.
This changeset is just doing the move to a context manager to make sure it is
correct.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Mon, 14 Mar 2016 00:12:22 +0000 |
parents | 68125d026b07 |
children | d9b929bcc3ad |
rev | line source |
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1 # __init__.py - topic extension |
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2 # |
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3 # This software may be used and distributed according to the terms of the |
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4 # GNU General Public License version 2 or any later version. |
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5 """support for topic branches |
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6 |
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7 Topic branches are lightweight branches which |
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8 disappear when changes are finalized. |
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9 |
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10 This is sort of similar to a bookmark, but it applies to a whole |
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11 series instead of a single revision. |
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12 """ |
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13 import functools |
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14 import contextlib |
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15 |
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16 from mercurial.i18n import _ |
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17 from mercurial import branchmap |
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18 from mercurial import bundle2 |
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19 from mercurial import cmdutil |
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20 from mercurial import commands |
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21 from mercurial import context |
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22 from mercurial import discovery as discoverymod |
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23 from mercurial import error |
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24 from mercurial import exchange |
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25 from mercurial import extensions |
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26 from mercurial import localrepo |
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27 from mercurial import lock |
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28 from mercurial import merge |
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29 from mercurial import namespaces |
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30 from mercurial import node |
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31 from mercurial import obsolete |
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32 from mercurial import patch |
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33 from mercurial import phases |
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34 from mercurial import util |
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35 from mercurial import wireproto |
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36 |
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37 from . import constants |
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38 from . import revset as topicrevset |
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39 from . import destination |
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40 from . import topicmap |
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41 from . import discovery |
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42 |
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43 cmdtable = {} |
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44 command = cmdutil.command(cmdtable) |
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45 |
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46 testedwith = '3.7' |
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47 |
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48 def _contexttopic(self): |
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49 return self.extra().get(constants.extrakey, '') |
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50 context.basectx.topic = _contexttopic |
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51 |
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52 def _namemap(repo, name): |
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53 return [ctx.node() for ctx in |
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54 repo.set('not public() and extra(topic, %s)', name)] |
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55 |
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56 def _nodemap(repo, node): |
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57 ctx = repo[node] |
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58 t = ctx.topic() |
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59 if t and ctx.phase() > phases.public: |
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60 return [t] |
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61 return [] |
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62 |
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63 def uisetup(ui): |
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64 destination.setupdest() |
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65 |
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66 @contextlib.contextmanager |
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67 def usetopicmap(repo): |
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68 """use awful monkey patching to update the topic cache""" |
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69 oldbranchcache = branchmap.branchcache |
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70 oldfilename = branchmap._filename |
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71 oldcaches = getattr(repo, '_branchcaches', {}) |
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72 try: |
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73 branchmap.branchcache = topicmap.topiccache |
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74 branchmap._filename = topicmap._filename |
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75 repo._branchcaches = getattr(repo, '_topiccaches', {}) |
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76 yield |
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77 repo._topiccaches = repo._branchcaches |
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78 finally: |
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79 repo._branchcaches = oldcaches |
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80 branchmap.branchcache = oldbranchcache |
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81 branchmap._filename = oldfilename |
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82 |
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83 def reposetup(ui, repo): |
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84 orig = repo.__class__ |
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85 if not isinstance(repo, localrepo.localrepository): |
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86 return # this can be a peer in the ssh case (puzzling) |
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87 class topicrepo(repo.__class__): |
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88 def commit(self, *args, **kwargs): |
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89 backup = self.ui.backupconfig('ui', 'allowemptycommit') |
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90 try: |
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91 if repo.currenttopic != repo['.'].topic(): |
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92 # bypass the core "nothing changed" logic |
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93 self.ui.setconfig('ui', 'allowemptycommit', True) |
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94 return orig.commit(self, *args, **kwargs) |
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95 finally: |
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96 self.ui.restoreconfig(backup) |
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97 |
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98 def commitctx(self, ctx, error=None): |
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99 if isinstance(ctx, context.workingcommitctx): |
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100 current = self.currenttopic |
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101 if current: |
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102 ctx.extra()[constants.extrakey] = current |
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103 if (isinstance(ctx, context.memctx) and |
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104 ctx.extra().get('amend_source') and |
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105 ctx.topic() and |
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106 not self.currenttopic): |
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107 # we are amending and need to remove a topic |
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108 del ctx.extra()[constants.extrakey] |
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109 return orig.commitctx(self, ctx, error=error) |
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110 |
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111 @property |
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112 def topics(self): |
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113 topics = set(['', self.currenttopic]) |
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114 for c in self.set('not public()'): |
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115 topics.add(c.topic()) |
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116 topics.remove('') |
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117 return topics |
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118 |
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119 @property |
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120 def currenttopic(self): |
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121 return self.vfs.tryread('topic') |
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122 |
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123 def branchmap(self, topic=True): |
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124 if not topic: |
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125 super(topicrepo, self).branchmap() |
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126 with usetopicmap(self): |
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127 branchmap.updatecache(self) |
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128 return self._topiccaches[self.filtername] |
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129 |
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130 def invalidatecaches(self): |
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131 super(topicrepo, self).invalidatecaches() |
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132 if '_topiccaches' in vars(self.unfiltered()): |
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133 self.unfiltered()._topiccaches.clear() |
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134 |
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135 def peer(self): |
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136 peer = super(topicrepo, self).peer() |
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137 if getattr(peer, '_repo', None) is not None: # localpeer |
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138 class topicpeer(peer.__class__): |
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139 def branchmap(self): |
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140 usetopic = not self._repo.publishing() |
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141 return self._repo.branchmap(topic=usetopic) |
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142 peer.__class__ = topicpeer |
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143 return peer |
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144 |
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145 |
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146 repo.__class__ = topicrepo |
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147 if util.safehasattr(repo, 'names'): |
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148 repo.names.addnamespace(namespaces.namespace( |
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149 'topics', 'topic', namemap=_namemap, nodemap=_nodemap, |
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150 listnames=lambda repo: repo.topics)) |
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151 |
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152 @command('topics [TOPIC]', [ |
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153 ('', 'clear', False, 'clear active topic if any'), |
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154 ('', 'change', '', 'revset of existing revisions to change topic'), |
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155 ]) |
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156 def topics(ui, repo, topic='', clear=False, change=None): |
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157 """View current topic, set current topic, or see all topics.""" |
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158 if change: |
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159 if not obsolete.isenabled(repo, obsolete.createmarkersopt): |
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160 raise util.Abort(_('must have obsolete enabled to use --change')) |
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161 if not topic and not clear: |
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162 raise util.Abort('changing topic requires a topic name or --clear') |
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163 if any(not c.mutable() for c in repo.set('%r and public()', change)): |
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164 raise util.Abort("can't change topic of a public change") |
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165 rewrote = 0 |
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166 needevolve = False |
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167 l = repo.lock() |
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168 txn = repo.transaction('rewrite-topics') |
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169 try: |
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170 for c in repo.set('%r', change): |
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171 def filectxfn(repo, ctx, path): |
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172 try: |
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173 return c[path] |
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174 except error.ManifestLookupError: |
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175 return None |
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176 fixedextra = dict(c.extra()) |
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177 ui.debug('old node id is %s\n' % node.hex(c.node())) |
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178 ui.debug('origextra: %r\n' % fixedextra) |
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179 newtopic = None if clear else topic |
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180 oldtopic = fixedextra.get(constants.extrakey, None) |
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181 if oldtopic == newtopic: |
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182 continue |
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183 if clear: |
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184 del fixedextra[constants.extrakey] |
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185 else: |
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186 fixedextra[constants.extrakey] = topic |
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187 if 'amend_source' in fixedextra: |
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188 # TODO: right now the commitctx wrapper in |
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189 # topicrepo overwrites the topic in extra if |
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190 # amend_source is set to support 'hg commit |
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191 # --amend'. Support for amend should be adjusted |
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192 # to not be so invasive. |
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193 del fixedextra['amend_source'] |
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194 ui.debug('changing topic of %s from %s to %s\n' % ( |
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195 c, oldtopic, newtopic)) |
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196 ui.debug('fixedextra: %r\n' % fixedextra) |
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197 mc = context.memctx( |
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198 repo, (c.p1().node(), c.p2().node()), c.description(), |
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199 c.files(), filectxfn, |
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200 user=c.user(), date=c.date(), extra=fixedextra) |
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201 newnode = repo.commitctx(mc) |
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202 ui.debug('new node id is %s\n' % node.hex(newnode)) |
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203 needevolve = needevolve or (len(c.children()) > 0) |
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204 obsolete.createmarkers(repo, [(c, (repo[newnode],))]) |
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205 rewrote += 1 |
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206 txn.close() |
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207 except: |
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208 try: |
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209 txn.abort() |
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210 finally: |
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211 repo.invalidate() |
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212 raise |
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213 finally: |
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214 lock.release(txn, l) |
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215 ui.status('changed topic on %d changes\n' % rewrote) |
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216 if needevolve: |
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217 evolvetarget = 'topic(%s)' % topic if topic else 'not topic()' |
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218 ui.status('please run hg evolve --rev "%s" now\n' % evolvetarget) |
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219 if clear: |
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220 if repo.vfs.exists('topic'): |
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221 repo.vfs.unlink('topic') |
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222 return |
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223 if topic: |
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224 with repo.vfs.open('topic', 'w') as f: |
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225 f.write(topic) |
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226 return |
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227 current = repo.currenttopic |
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228 for t in sorted(repo.topics): |
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229 marker = '*' if t == current else ' ' |
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230 ui.write(' %s %s\n' % (marker, t)) |
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231 |
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232 def summaryhook(ui, repo): |
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233 t = repo.currenttopic |
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234 if not t: |
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235 return |
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236 # i18n: column positioning for "hg summary" |
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237 ui.write(_("topic: %s\n") % t) |
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238 |
1850 | 239 def commitwrap(orig, ui, repo, *args, **opts): |
240 if opts.get('topic'): | |
241 t = opts['topic'] | |
242 with repo.vfs.open('topic', 'w') as f: | |
243 f.write(t) | |
244 return orig(ui, repo, *args, **opts) | |
245 | |
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246 def committextwrap(orig, repo, ctx, subs, extramsg): |
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247 ret = orig(repo, ctx, subs, extramsg) |
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248 t = repo.currenttopic |
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249 if t: |
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250 ret = ret.replace("\nHG: branch", |
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251 "\nHG: topic '%s'\nHG: branch" % t) |
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252 return ret |
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253 |
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254 def mergeupdatewrap(orig, repo, node, branchmerge, force, *args, **kwargs): |
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255 partial = bool(len(args)) or 'matcher' in kwargs |
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256 wlock = repo.wlock() |
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257 try: |
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258 ret = orig(repo, node, branchmerge, force, *args, **kwargs) |
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259 if not partial and not branchmerge: |
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260 ot = repo.currenttopic |
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261 t = '' |
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262 pctx = repo[node] |
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263 if pctx.phase() > phases.public: |
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264 t = pctx.topic() |
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265 with repo.vfs.open('topic', 'w') as f: |
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266 f.write(t) |
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267 if t and t != ot: |
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268 repo.ui.status(_("switching to topic %s\n") % t) |
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269 return ret |
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270 finally: |
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271 wlock.release() |
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272 |
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273 def _fixrebase(loaded): |
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274 if not loaded: |
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275 return |
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276 |
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277 def savetopic(ctx, extra): |
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278 if ctx.topic(): |
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279 extra[constants.extrakey] = ctx.topic() |
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280 |
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281 def newmakeextrafn(orig, copiers): |
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282 return orig(copiers + [savetopic]) |
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283 |
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284 rebase = extensions.find("rebase") |
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285 extensions.wrapfunction(rebase, '_makeextrafn', newmakeextrafn) |
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286 |
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287 def _exporttopic(seq, ctx): |
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288 topic = ctx.topic() |
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289 if topic: |
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290 return 'EXP-Topic %s' % topic |
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291 return None |
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292 |
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293 def _importtopic(repo, patchdata, extra, opts): |
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294 if 'topic' in patchdata: |
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295 extra['topic'] = patchdata['topic'] |
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296 |
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297 extensions.afterloaded('rebase', _fixrebase) |
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298 |
1850 | 299 entry = extensions.wrapcommand(commands.table, 'commit', commitwrap) |
300 entry[1].append(('t', 'topic', '', | |
301 _("use specified topic"), _('TOPIC'))) | |
302 | |
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303 extensions.wrapfunction(cmdutil, 'buildcommittext', committextwrap) |
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304 extensions.wrapfunction(merge, 'update', mergeupdatewrap) |
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305 extensions.wrapfunction(discoverymod, '_headssummary', discovery._headssummary) |
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306 extensions.wrapfunction(wireproto, 'branchmap', discovery.wireprotobranchmap) |
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307 extensions.wrapfunction(bundle2, 'handlecheckheads', discovery.handlecheckheads) |
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308 bundle2.handlecheckheads.params = frozenset() # we need a proper wrape b2 part stuff |
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309 bundle2.parthandlermapping['check:heads'] = bundle2.handlecheckheads |
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310 extensions.wrapfunction(exchange, '_pushb2phases', discovery._pushb2phases) |
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311 exchange.b2partsgenmapping['phase'] = exchange._pushb2phases |
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312 topicrevset.modsetup() |
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313 cmdutil.summaryhooks.add('topic', summaryhook) |
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314 |
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315 if util.safehasattr(cmdutil, 'extraexport'): |
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316 cmdutil.extraexport.append('topic') |
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317 cmdutil.extraexportmap['topic'] = _exporttopic |
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318 if util.safehasattr(cmdutil, 'extrapreimport'): |
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319 cmdutil.extrapreimport.append('topic') |
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320 cmdutil.extrapreimportmap['topic'] = _importtopic |
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321 if util.safehasattr(patch, 'patchheadermap'): |
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322 patch.patchheadermap.append(('EXP-Topic', 'topic')) |