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annotate mercurial/exchange.py @ 20467:ef880ced6d07

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push: move `commonheads` into the push object The phase synchronisation start by computing the new set of common head between local and remote and then do the phase synchronisation on this set. This new common set logic will eventually be used by the obsolescence markers exchange. So we are going to split the long phase synchronisation in two.
author Pierre-Yves David <pierre-yves.david@logilab.fr>
date Thu, 30 Jan 2014 23:16:43 -0800
parents 233623d58c9a
children 7d0bbb6dd730
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1 # exchange.py - utily to exchange data between repo.
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2 #
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from i18n import _
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9 from node import hex
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10 import errno
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11 import util, scmutil, changegroup
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12 import discovery, phases, obsolete, bookmarks
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13
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14
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15 class pushoperation(object):
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16 """A object that represent a single push operation
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17
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18 It purpose is to carry push related state and very common operation.
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19
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20 A new should be created at the begining of each push and discarded
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21 afterward.
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22 """
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23
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24 def __init__(self, repo, remote, force=False, revs=None, newbranch=False):
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25 # repo we push from
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26 self.repo = repo
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27 self.ui = repo.ui
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28 # repo we push to
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29 self.remote = remote
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30 # force option provided
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31 self.force = force
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32 # revs to be pushed (None is "all")
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33 self.revs = revs
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34 # allow push of new branch
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35 self.newbranch = newbranch
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36 # did a local lock get acquired?
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37 self.locallocked = None
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38 # Integer version of the push result
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39 # - None means nothing to push
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40 # - 0 means HTTP error
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41 # - 1 means we pushed and remote head count is unchanged *or*
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42 # we have outgoing changesets but refused to push
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43 # - other values as described by addchangegroup()
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44 self.ret = None
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45 # discover.outgoing object (contains common and outgoin data)
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46 self.outgoing = None
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47 # all remote heads before the push
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48 self.remoteheads = None
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49 # testable as a boolean indicating if any nodes are missing locally.
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50 self.incoming = None
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51 # set of all heads common after changeset bundle push
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52 self.commonheads = None
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53
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54 def push(repo, remote, force=False, revs=None, newbranch=False):
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55 '''Push outgoing changesets (limited by revs) from a local
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56 repository to remote. Return an integer:
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57 - None means nothing to push
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58 - 0 means HTTP error
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59 - 1 means we pushed and remote head count is unchanged *or*
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60 we have outgoing changesets but refused to push
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61 - other values as described by addchangegroup()
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62 '''
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63 pushop = pushoperation(repo, remote, force, revs, newbranch)
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64 if pushop.remote.local():
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65 missing = (set(pushop.repo.requirements)
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66 - pushop.remote.local().supported)
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67 if missing:
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68 msg = _("required features are not"
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69 " supported in the destination:"
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70 " %s") % (', '.join(sorted(missing)))
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71 raise util.Abort(msg)
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72
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73 # there are two ways to push to remote repo:
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74 #
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75 # addchangegroup assumes local user can lock remote
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76 # repo (local filesystem, old ssh servers).
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77 #
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78 # unbundle assumes local user cannot lock remote repo (new ssh
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79 # servers, http servers).
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80
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81 if not pushop.remote.canpush():
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82 raise util.Abort(_("destination does not support push"))
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83 # get local lock as we might write phase data
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84 locallock = None
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85 try:
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86 locallock = pushop.repo.lock()
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87 pushop.locallocked = True
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88 except IOError, err:
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89 pushop.locallocked = False
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90 if err.errno != errno.EACCES:
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91 raise
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92 # source repo cannot be locked.
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93 # We do not abort the push, but just disable the local phase
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94 # synchronisation.
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95 msg = 'cannot lock source repository: %s\n' % err
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96 pushop.ui.debug(msg)
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97 try:
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98 pushop.repo.checkpush(pushop.force, pushop.revs)
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99 lock = None
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100 unbundle = pushop.remote.capable('unbundle')
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101 if not unbundle:
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102 lock = pushop.remote.lock()
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103 try:
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104 _pushdiscovery(pushop)
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105 if _pushcheckoutgoing(pushop):
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106 _pushchangeset(pushop)
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107 _pushsyncphase(pushop)
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108 _pushobsolete(pushop)
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109 finally:
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110 if lock is not None:
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111 lock.release()
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112 finally:
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113 if locallock is not None:
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114 locallock.release()
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115
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116 _pushbookmark(pushop)
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117 return pushop.ret
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118
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119 def _pushdiscovery(pushop):
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120 # discovery
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121 unfi = pushop.repo.unfiltered()
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122 fci = discovery.findcommonincoming
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123 commoninc = fci(unfi, pushop.remote, force=pushop.force)
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124 common, inc, remoteheads = commoninc
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125 fco = discovery.findcommonoutgoing
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126 outgoing = fco(unfi, pushop.remote, onlyheads=pushop.revs,
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127 commoninc=commoninc, force=pushop.force)
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128 pushop.outgoing = outgoing
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129 pushop.remoteheads = remoteheads
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130 pushop.incoming = inc
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131
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132 def _pushcheckoutgoing(pushop):
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133 outgoing = pushop.outgoing
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134 unfi = pushop.repo.unfiltered()
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135 if not outgoing.missing:
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136 # nothing to push
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137 scmutil.nochangesfound(unfi.ui, unfi, outgoing.excluded)
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138 return False
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139 # something to push
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140 if not pushop.force:
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141 # if repo.obsstore == False --> no obsolete
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142 # then, save the iteration
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143 if unfi.obsstore:
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144 # this message are here for 80 char limit reason
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145 mso = _("push includes obsolete changeset: %s!")
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146 mst = "push includes %s changeset: %s!"
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147 # plain versions for i18n tool to detect them
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148 _("push includes unstable changeset: %s!")
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149 _("push includes bumped changeset: %s!")
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150 _("push includes divergent changeset: %s!")
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151 # If we are to push if there is at least one
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152 # obsolete or unstable changeset in missing, at
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153 # least one of the missinghead will be obsolete or
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154 # unstable. So checking heads only is ok
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155 for node in outgoing.missingheads:
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156 ctx = unfi[node]
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157 if ctx.obsolete():
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158 raise util.Abort(mso % ctx)
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159 elif ctx.troubled():
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160 raise util.Abort(_(mst)
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161 % (ctx.troubles()[0],
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162 ctx))
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163 newbm = pushop.ui.configlist('bookmarks', 'pushing')
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164 discovery.checkheads(unfi, pushop.remote, outgoing,
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165 pushop.remoteheads,
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166 pushop.newbranch,
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167 bool(pushop.incoming),
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168 newbm)
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169 return True
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170
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171 def _pushchangeset(pushop):
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172 """Make the actual push of changeset bundle to remote repo"""
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173 outgoing = pushop.outgoing
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174 unbundle = pushop.remote.capable('unbundle')
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175 # TODO: get bundlecaps from remote
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176 bundlecaps = None
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177 # create a changegroup from local
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178 if pushop.revs is None and not (outgoing.excluded
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179 or pushop.repo.changelog.filteredrevs):
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180 # push everything,
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181 # use the fast path, no race possible on push
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182 bundler = changegroup.bundle10(pushop.repo, bundlecaps)
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183 cg = pushop.repo._changegroupsubset(outgoing,
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184 bundler,
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185 'push',
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186 fastpath=True)
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187 else:
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188 cg = pushop.repo.getlocalbundle('push', outgoing, bundlecaps)
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189
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190 # apply changegroup to remote
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191 if unbundle:
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192 # local repo finds heads on server, finds out what
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193 # revs it must push. once revs transferred, if server
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194 # finds it has different heads (someone else won
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195 # commit/push race), server aborts.
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196 if pushop.force:
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197 remoteheads = ['force']
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198 else:
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199 remoteheads = pushop.remoteheads
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200 # ssh: return remote's addchangegroup()
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201 # http: return remote's addchangegroup() or 0 for error
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202 pushop.ret = pushop.remote.unbundle(cg, remoteheads,
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203 'push')
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204 else:
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205 # we return an integer indicating remote head count
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206 # change
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207 pushop.ret = pushop.remote.addchangegroup(cg, 'push',
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208 pushop.repo.url())
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209
20441
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210 def _pushsyncphase(pushop):
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211 """synchronise phase information locally and remotly"""
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212 unfi = pushop.repo.unfiltered()
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213 if pushop.ret:
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214 # push succeed, synchronize target of the push
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215 cheads = pushop.outgoing.missingheads
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216 elif pushop.revs is None:
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217 # All out push fails. synchronize all common
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218 cheads = pushop.outgoing.commonheads
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219 else:
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220 # I want cheads = heads(::missingheads and ::commonheads)
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221 # (missingheads is revs with secret changeset filtered out)
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222 #
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223 # This can be expressed as:
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224 # cheads = ( (missingheads and ::commonheads)
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225 # + (commonheads and ::missingheads))"
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226 # )
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227 #
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228 # while trying to push we already computed the following:
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229 # common = (::commonheads)
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230 # missing = ((commonheads::missingheads) - commonheads)
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231 #
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232 # We can pick:
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233 # * missingheads part of common (::commonheads)
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234 common = set(pushop.outgoing.common)
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235 nm = pushop.repo.changelog.nodemap
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236 cheads = [node for node in pushop.revs if nm[node] in common]
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237 # and
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238 # * commonheads parents on missing
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239 revset = unfi.set('%ln and parents(roots(%ln))',
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240 pushop.outgoing.commonheads,
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241 pushop.outgoing.missing)
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242 cheads.extend(c.node() for c in revset)
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243 pushop.commonheads = cheads
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244 # even when we don't push, exchanging phase data is useful
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245 remotephases = pushop.remote.listkeys('phases')
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246 if (pushop.ui.configbool('ui', '_usedassubrepo', False)
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247 and remotephases # server supports phases
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248 and pushop.ret is None # nothing was pushed
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249 and remotephases.get('publishing', False)):
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250 # When:
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251 # - this is a subrepo push
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252 # - and remote support phase
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253 # - and no changeset was pushed
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254 # - and remote is publishing
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255 # We may be in issue 3871 case!
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256 # We drop the possible phase synchronisation done by
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257 # courtesy to publish changesets possibly locally draft
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258 # on the remote.
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259 remotephases = {'publishing': 'True'}
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260 if not remotephases: # old server or public only rer
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261 _localphasemove(pushop, cheads)
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262 # don't push any phase data as there is nothing to push
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263 else:
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264 ana = phases.analyzeremotephases(pushop.repo, cheads,
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265 remotephases)
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266 pheads, droots = ana
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267 ### Apply remote phase on local
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268 if remotephases.get('publishing', False):
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269 _localphasemove(pushop, cheads)
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270 else: # publish = False
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271 _localphasemove(pushop, pheads)
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272 _localphasemove(pushop, cheads, phases.draft)
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273 ### Apply local phase on remote
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274
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275 # Get the list of all revs draft on remote by public here.
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276 # XXX Beware that revset break if droots is not strictly
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277 # XXX root we may want to ensure it is but it is costly
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278 outdated = unfi.set('heads((%ln::%ln) and public())',
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279 droots, cheads)
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280 for newremotehead in outdated:
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281 r = pushop.remote.pushkey('phases',
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282 newremotehead.hex(),
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283 str(phases.draft),
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284 str(phases.public))
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285 if not r:
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286 pushop.ui.warn(_('updating %s to public failed!\n')
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287 % newremotehead)
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288
20438
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289 def _localphasemove(pushop, nodes, phase=phases.public):
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290 """move <nodes> to <phase> in the local source repo"""
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291 if pushop.locallocked:
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292 phases.advanceboundary(pushop.repo, phase, nodes)
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293 else:
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294 # repo is not locked, do not change any phases!
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295 # Informs the user that phases should have been moved when
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296 # applicable.
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297 actualmoves = [n for n in nodes if phase < pushop.repo[n].phase()]
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298 phasestr = phases.phasenames[phase]
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299 if actualmoves:
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300 pushop.ui.status(_('cannot lock source repo, skipping '
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301 'local %s phase update\n') % phasestr)
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302
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303 def _pushobsolete(pushop):
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304 """utility function to push obsolete markers to a remote"""
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305 pushop.ui.debug('try to push obsolete markers to remote\n')
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306 repo = pushop.repo
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307 remote = pushop.remote
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308 if (obsolete._enabled and repo.obsstore and
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309 'obsolete' in remote.listkeys('namespaces')):
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310 rslts = []
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311 remotedata = repo.listkeys('obsolete')
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312 for key in sorted(remotedata, reverse=True):
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313 # reverse sort to ensure we end with dump0
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314 data = remotedata[key]
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315 rslts.append(remote.pushkey('obsolete', key, '', data))
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316 if [r for r in rslts if not r]:
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317 msg = _('failed to push some obsolete markers!\n')
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318 repo.ui.warn(msg)
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319
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320 def _pushbookmark(pushop):
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321 """Update bookmark position on remote"""
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322 ui = pushop.ui
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323 repo = pushop.repo.unfiltered()
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324 remote = pushop.remote
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325 ui.debug("checking for updated bookmarks\n")
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326 revnums = map(repo.changelog.rev, pushop.revs or [])
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327 ancestors = [a for a in repo.changelog.ancestors(revnums, inclusive=True)]
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328 (addsrc, adddst, advsrc, advdst, diverge, differ, invalid
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329 ) = bookmarks.compare(repo, repo._bookmarks, remote.listkeys('bookmarks'),
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330 srchex=hex)
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331
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332 for b, scid, dcid in advsrc:
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333 if ancestors and repo[scid].rev() not in ancestors:
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334 continue
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335 if remote.pushkey('bookmarks', b, dcid, scid):
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336 ui.status(_("updating bookmark %s\n") % b)
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337 else:
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338 ui.warn(_('updating bookmark %s failed!\n') % b)