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annotate mercurial/exchange.py @ 20466:233623d58c9a

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push: move discovery in its own function Now that every necessary information is held in the `pushoperation` object, we can extract the discovery logic to it's own function. This changeset is pure code movement only.
author Pierre-Yves David <pierre-yves.david@logilab.fr>
date Thu, 30 Jan 2014 21:05:29 -0800
parents 170f71061069
children ef880ced6d07
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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
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52 def push(repo, remote, force=False, revs=None, newbranch=False):
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53 '''Push outgoing changesets (limited by revs) from a local
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54 repository to remote. Return an integer:
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55 - None means nothing to push
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56 - 0 means HTTP error
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57 - 1 means we pushed and remote head count is unchanged *or*
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58 we have outgoing changesets but refused to push
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59 - other values as described by addchangegroup()
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60 '''
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61 pushop = pushoperation(repo, remote, force, revs, newbranch)
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62 if pushop.remote.local():
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63 missing = (set(pushop.repo.requirements)
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64 - pushop.remote.local().supported)
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65 if missing:
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66 msg = _("required features are not"
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67 " supported in the destination:"
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68 " %s") % (', '.join(sorted(missing)))
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69 raise util.Abort(msg)
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70
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71 # there are two ways to push to remote repo:
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72 #
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73 # addchangegroup assumes local user can lock remote
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74 # repo (local filesystem, old ssh servers).
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75 #
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76 # unbundle assumes local user cannot lock remote repo (new ssh
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77 # servers, http servers).
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78
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79 if not pushop.remote.canpush():
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80 raise util.Abort(_("destination does not support push"))
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81 # get local lock as we might write phase data
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82 locallock = None
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83 try:
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84 locallock = pushop.repo.lock()
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85 pushop.locallocked = True
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86 except IOError, err:
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87 pushop.locallocked = False
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88 if err.errno != errno.EACCES:
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89 raise
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90 # source repo cannot be locked.
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91 # We do not abort the push, but just disable the local phase
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92 # synchronisation.
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93 msg = 'cannot lock source repository: %s\n' % err
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94 pushop.ui.debug(msg)
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95 try:
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96 pushop.repo.checkpush(pushop.force, pushop.revs)
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97 lock = None
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98 unbundle = pushop.remote.capable('unbundle')
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99 if not unbundle:
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100 lock = pushop.remote.lock()
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101 try:
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102 _pushdiscovery(pushop)
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103 if _pushcheckoutgoing(pushop):
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104 _pushchangeset(pushop)
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105 _pushsyncphase(pushop)
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106 _pushobsolete(pushop)
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107 finally:
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108 if lock is not None:
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109 lock.release()
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110 finally:
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111 if locallock is not None:
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112 locallock.release()
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113
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114 _pushbookmark(pushop)
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115 return pushop.ret
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116
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117 def _pushdiscovery(pushop):
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118 # discovery
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119 unfi = pushop.repo.unfiltered()
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120 fci = discovery.findcommonincoming
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121 commoninc = fci(unfi, pushop.remote, force=pushop.force)
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122 common, inc, remoteheads = commoninc
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123 fco = discovery.findcommonoutgoing
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124 outgoing = fco(unfi, pushop.remote, onlyheads=pushop.revs,
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125 commoninc=commoninc, force=pushop.force)
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126 pushop.outgoing = outgoing
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127 pushop.remoteheads = remoteheads
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128 pushop.incoming = inc
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129
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130 def _pushcheckoutgoing(pushop):
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131 outgoing = pushop.outgoing
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132 unfi = pushop.repo.unfiltered()
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133 if not outgoing.missing:
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134 # nothing to push
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135 scmutil.nochangesfound(unfi.ui, unfi, outgoing.excluded)
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136 return False
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137 # something to push
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138 if not pushop.force:
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139 # if repo.obsstore == False --> no obsolete
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140 # then, save the iteration
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141 if unfi.obsstore:
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142 # this message are here for 80 char limit reason
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143 mso = _("push includes obsolete changeset: %s!")
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144 mst = "push includes %s changeset: %s!"
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145 # plain versions for i18n tool to detect them
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146 _("push includes unstable changeset: %s!")
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147 _("push includes bumped changeset: %s!")
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148 _("push includes divergent changeset: %s!")
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149 # If we are to push if there is at least one
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150 # obsolete or unstable changeset in missing, at
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151 # least one of the missinghead will be obsolete or
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152 # unstable. So checking heads only is ok
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153 for node in outgoing.missingheads:
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154 ctx = unfi[node]
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155 if ctx.obsolete():
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156 raise util.Abort(mso % ctx)
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157 elif ctx.troubled():
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158 raise util.Abort(_(mst)
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159 % (ctx.troubles()[0],
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160 ctx))
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161 newbm = pushop.ui.configlist('bookmarks', 'pushing')
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162 discovery.checkheads(unfi, pushop.remote, outgoing,
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163 pushop.remoteheads,
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164 pushop.newbranch,
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165 bool(pushop.incoming),
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166 newbm)
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167 return True
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168
20463
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169 def _pushchangeset(pushop):
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170 """Make the actual push of changeset bundle to remote repo"""
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171 outgoing = pushop.outgoing
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172 unbundle = pushop.remote.capable('unbundle')
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173 # TODO: get bundlecaps from remote
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174 bundlecaps = None
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175 # create a changegroup from local
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176 if pushop.revs is None and not (outgoing.excluded
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177 or pushop.repo.changelog.filteredrevs):
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178 # push everything,
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179 # use the fast path, no race possible on push
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180 bundler = changegroup.bundle10(pushop.repo, bundlecaps)
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181 cg = pushop.repo._changegroupsubset(outgoing,
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182 bundler,
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183 'push',
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184 fastpath=True)
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185 else:
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186 cg = pushop.repo.getlocalbundle('push', outgoing, bundlecaps)
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187
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188 # apply changegroup to remote
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189 if unbundle:
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190 # local repo finds heads on server, finds out what
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191 # revs it must push. once revs transferred, if server
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192 # finds it has different heads (someone else won
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193 # commit/push race), server aborts.
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194 if pushop.force:
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195 remoteheads = ['force']
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196 else:
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197 remoteheads = pushop.remoteheads
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198 # ssh: return remote's addchangegroup()
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199 # http: return remote's addchangegroup() or 0 for error
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200 pushop.ret = pushop.remote.unbundle(cg, remoteheads,
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201 'push')
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202 else:
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203 # we return an integer indicating remote head count
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204 # change
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205 pushop.ret = pushop.remote.addchangegroup(cg, 'push',
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206 pushop.repo.url())
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207
20441
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208 def _pushsyncphase(pushop):
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209 """synchronise phase information locally and remotly"""
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210 unfi = pushop.repo.unfiltered()
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211 if pushop.ret:
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212 # push succeed, synchronize target of the push
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213 cheads = pushop.outgoing.missingheads
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214 elif pushop.revs is None:
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215 # All out push fails. synchronize all common
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216 cheads = pushop.outgoing.commonheads
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217 else:
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218 # I want cheads = heads(::missingheads and ::commonheads)
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219 # (missingheads is revs with secret changeset filtered out)
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220 #
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221 # This can be expressed as:
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222 # cheads = ( (missingheads and ::commonheads)
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223 # + (commonheads and ::missingheads))"
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224 # )
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225 #
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226 # while trying to push we already computed the following:
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227 # common = (::commonheads)
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228 # missing = ((commonheads::missingheads) - commonheads)
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229 #
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230 # We can pick:
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231 # * missingheads part of common (::commonheads)
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232 common = set(pushop.outgoing.common)
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233 nm = pushop.repo.changelog.nodemap
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234 cheads = [node for node in pushop.revs if nm[node] in common]
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235 # and
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236 # * commonheads parents on missing
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237 revset = unfi.set('%ln and parents(roots(%ln))',
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238 pushop.outgoing.commonheads,
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239 pushop.outgoing.missing)
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240 cheads.extend(c.node() for c in revset)
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241 # even when we don't push, exchanging phase data is useful
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242 remotephases = pushop.remote.listkeys('phases')
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243 if (pushop.ui.configbool('ui', '_usedassubrepo', False)
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244 and remotephases # server supports phases
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245 and pushop.ret is None # nothing was pushed
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246 and remotephases.get('publishing', False)):
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247 # When:
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248 # - this is a subrepo push
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249 # - and remote support phase
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250 # - and no changeset was pushed
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251 # - and remote is publishing
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252 # We may be in issue 3871 case!
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253 # We drop the possible phase synchronisation done by
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254 # courtesy to publish changesets possibly locally draft
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255 # on the remote.
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256 remotephases = {'publishing': 'True'}
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257 if not remotephases: # old server or public only rer
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258 _localphasemove(pushop, cheads)
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259 # don't push any phase data as there is nothing to push
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260 else:
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261 ana = phases.analyzeremotephases(pushop.repo, cheads,
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262 remotephases)
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263 pheads, droots = ana
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264 ### Apply remote phase on local
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265 if remotephases.get('publishing', False):
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266 _localphasemove(pushop, cheads)
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267 else: # publish = False
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268 _localphasemove(pushop, pheads)
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269 _localphasemove(pushop, cheads, phases.draft)
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270 ### Apply local phase on remote
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271
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272 # Get the list of all revs draft on remote by public here.
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273 # XXX Beware that revset break if droots is not strictly
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274 # XXX root we may want to ensure it is but it is costly
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275 outdated = unfi.set('heads((%ln::%ln) and public())',
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276 droots, cheads)
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277 for newremotehead in outdated:
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278 r = pushop.remote.pushkey('phases',
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279 newremotehead.hex(),
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280 str(phases.draft),
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281 str(phases.public))
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282 if not r:
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283 pushop.ui.warn(_('updating %s to public failed!\n')
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284 % newremotehead)
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285
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286 def _localphasemove(pushop, nodes, phase=phases.public):
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287 """move <nodes> to <phase> in the local source repo"""
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288 if pushop.locallocked:
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289 phases.advanceboundary(pushop.repo, phase, nodes)
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290 else:
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291 # repo is not locked, do not change any phases!
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292 # Informs the user that phases should have been moved when
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293 # applicable.
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294 actualmoves = [n for n in nodes if phase < pushop.repo[n].phase()]
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295 phasestr = phases.phasenames[phase]
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296 if actualmoves:
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297 pushop.ui.status(_('cannot lock source repo, skipping '
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298 'local %s phase update\n') % phasestr)
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299
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300 def _pushobsolete(pushop):
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301 """utility function to push obsolete markers to a remote"""
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302 pushop.ui.debug('try to push obsolete markers to remote\n')
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303 repo = pushop.repo
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304 remote = pushop.remote
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305 if (obsolete._enabled and repo.obsstore and
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306 'obsolete' in remote.listkeys('namespaces')):
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307 rslts = []
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308 remotedata = repo.listkeys('obsolete')
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309 for key in sorted(remotedata, reverse=True):
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310 # reverse sort to ensure we end with dump0
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311 data = remotedata[key]
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312 rslts.append(remote.pushkey('obsolete', key, '', data))
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313 if [r for r in rslts if not r]:
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314 msg = _('failed to push some obsolete markers!\n')
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315 repo.ui.warn(msg)
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316
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317 def _pushbookmark(pushop):
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318 """Update bookmark position on remote"""
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319 ui = pushop.ui
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320 repo = pushop.repo.unfiltered()
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321 remote = pushop.remote
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322 ui.debug("checking for updated bookmarks\n")
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323 revnums = map(repo.changelog.rev, pushop.revs or [])
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324 ancestors = [a for a in repo.changelog.ancestors(revnums, inclusive=True)]
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325 (addsrc, adddst, advsrc, advdst, diverge, differ, invalid
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326 ) = bookmarks.compare(repo, repo._bookmarks, remote.listkeys('bookmarks'),
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327 srchex=hex)
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328
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329 for b, scid, dcid in advsrc:
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330 if ancestors and repo[scid].rev() not in ancestors:
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331 continue
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332 if remote.pushkey('bookmarks', b, dcid, scid):
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333 ui.status(_("updating bookmark %s\n") % b)
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334 else:
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335 ui.warn(_('updating bookmark %s failed!\n') % b)