Mercurial > hg
annotate mercurial/exchange.py @ 20954:dba91f8060eb
bundle2: add an exchange.getbundle function
This function can return a `HG10` or `HG20` bundle. It uses the `bundlecaps`
parameters to decides which one to return.
This is a distinct function from `changegroup.getbundle` for two reasons. First
the APIs of `bundle10` and `bundle20` are not compatible yet. The two functions
may be reunited in the future. Second `exchange.getbundle` will grow parameters
for all kinds of data (phases, obsmarkers, ...) so it's better to keep the
changegroup generation in its own function for now.
This function will be used it in the next changesets.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Fri, 04 Apr 2014 01:51:54 -0700 |
parents | d3775db748a0 |
children | 12f161f08d74 |
rev | line source |
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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, nullid |
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10 import errno |
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11 import util, scmutil, changegroup, base85 |
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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) |
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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 _pushcomputecommonheads(pushop) |
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108 _pushsyncphase(pushop) |
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109 _pushobsolete(pushop) |
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110 finally: |
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111 if lock is not None: |
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112 lock.release() |
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113 finally: |
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114 if locallock is not None: |
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115 locallock.release() |
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116 |
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117 _pushbookmark(pushop) |
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118 return pushop.ret |
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119 |
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120 def _pushdiscovery(pushop): |
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121 # discovery |
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122 unfi = pushop.repo.unfiltered() |
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123 fci = discovery.findcommonincoming |
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124 commoninc = fci(unfi, pushop.remote, force=pushop.force) |
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125 common, inc, remoteheads = commoninc |
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126 fco = discovery.findcommonoutgoing |
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127 outgoing = fco(unfi, pushop.remote, onlyheads=pushop.revs, |
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128 commoninc=commoninc, force=pushop.force) |
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129 pushop.outgoing = outgoing |
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130 pushop.remoteheads = remoteheads |
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131 pushop.incoming = inc |
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132 |
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133 def _pushcheckoutgoing(pushop): |
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134 outgoing = pushop.outgoing |
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135 unfi = pushop.repo.unfiltered() |
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136 if not outgoing.missing: |
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137 # nothing to push |
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138 scmutil.nochangesfound(unfi.ui, unfi, outgoing.excluded) |
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139 return False |
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140 # something to push |
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141 if not pushop.force: |
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142 # if repo.obsstore == False --> no obsolete |
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143 # then, save the iteration |
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144 if unfi.obsstore: |
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145 # this message are here for 80 char limit reason |
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146 mso = _("push includes obsolete changeset: %s!") |
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147 mst = "push includes %s changeset: %s!" |
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148 # plain versions for i18n tool to detect them |
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149 _("push includes unstable changeset: %s!") |
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150 _("push includes bumped changeset: %s!") |
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151 _("push includes divergent changeset: %s!") |
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152 # If we are to push if there is at least one |
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153 # obsolete or unstable changeset in missing, at |
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154 # least one of the missinghead will be obsolete or |
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155 # unstable. So checking heads only is ok |
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156 for node in outgoing.missingheads: |
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157 ctx = unfi[node] |
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158 if ctx.obsolete(): |
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159 raise util.Abort(mso % ctx) |
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160 elif ctx.troubled(): |
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161 raise util.Abort(_(mst) |
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162 % (ctx.troubles()[0], |
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163 ctx)) |
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164 newbm = pushop.ui.configlist('bookmarks', 'pushing') |
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165 discovery.checkheads(unfi, pushop.remote, outgoing, |
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166 pushop.remoteheads, |
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167 pushop.newbranch, |
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168 bool(pushop.incoming), |
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169 newbm) |
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170 return True |
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171 |
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172 def _pushchangeset(pushop): |
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173 """Make the actual push of changeset bundle to remote repo""" |
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174 outgoing = pushop.outgoing |
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175 unbundle = pushop.remote.capable('unbundle') |
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176 # TODO: get bundlecaps from remote |
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177 bundlecaps = None |
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178 # create a changegroup from local |
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179 if pushop.revs is None and not (outgoing.excluded |
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180 or pushop.repo.changelog.filteredrevs): |
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181 # push everything, |
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182 # use the fast path, no race possible on push |
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183 bundler = changegroup.bundle10(pushop.repo, bundlecaps) |
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184 cg = changegroup.getsubset(pushop.repo, |
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185 outgoing, |
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186 bundler, |
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187 'push', |
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188 fastpath=True) |
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189 else: |
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190 cg = changegroup.getlocalbundle(pushop.repo, 'push', outgoing, |
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191 bundlecaps) |
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192 |
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193 # apply changegroup to remote |
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194 if unbundle: |
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195 # local repo finds heads on server, finds out what |
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196 # revs it must push. once revs transferred, if server |
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197 # finds it has different heads (someone else won |
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198 # commit/push race), server aborts. |
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199 if pushop.force: |
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200 remoteheads = ['force'] |
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201 else: |
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202 remoteheads = pushop.remoteheads |
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203 # ssh: return remote's addchangegroup() |
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204 # http: return remote's addchangegroup() or 0 for error |
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205 pushop.ret = pushop.remote.unbundle(cg, remoteheads, |
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206 'push') |
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207 else: |
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208 # we return an integer indicating remote head count |
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209 # change |
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210 pushop.ret = pushop.remote.addchangegroup(cg, 'push', |
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211 pushop.repo.url()) |
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212 |
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213 def _pushcomputecommonheads(pushop): |
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214 unfi = pushop.repo.unfiltered() |
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215 if pushop.ret: |
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216 # push succeed, synchronize target of the push |
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217 cheads = pushop.outgoing.missingheads |
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218 elif pushop.revs is None: |
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219 # All out push fails. synchronize all common |
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220 cheads = pushop.outgoing.commonheads |
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221 else: |
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222 # I want cheads = heads(::missingheads and ::commonheads) |
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223 # (missingheads is revs with secret changeset filtered out) |
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224 # |
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225 # This can be expressed as: |
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226 # cheads = ( (missingheads and ::commonheads) |
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227 # + (commonheads and ::missingheads))" |
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228 # ) |
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229 # |
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230 # while trying to push we already computed the following: |
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231 # common = (::commonheads) |
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232 # missing = ((commonheads::missingheads) - commonheads) |
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233 # |
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234 # We can pick: |
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235 # * missingheads part of common (::commonheads) |
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236 common = set(pushop.outgoing.common) |
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237 nm = pushop.repo.changelog.nodemap |
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238 cheads = [node for node in pushop.revs if nm[node] in common] |
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239 # and |
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240 # * commonheads parents on missing |
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241 revset = unfi.set('%ln and parents(roots(%ln))', |
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242 pushop.outgoing.commonheads, |
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243 pushop.outgoing.missing) |
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244 cheads.extend(c.node() for c in revset) |
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245 pushop.commonheads = cheads |
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246 |
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247 def _pushsyncphase(pushop): |
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248 """synchronise phase information locally and remotly""" |
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249 unfi = pushop.repo.unfiltered() |
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250 cheads = pushop.commonheads |
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251 if pushop.ret: |
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252 # push succeed, synchronize target of the push |
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253 cheads = pushop.outgoing.missingheads |
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254 elif pushop.revs is None: |
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255 # All out push fails. synchronize all common |
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256 cheads = pushop.outgoing.commonheads |
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257 else: |
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258 # I want cheads = heads(::missingheads and ::commonheads) |
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259 # (missingheads is revs with secret changeset filtered out) |
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260 # |
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261 # This can be expressed as: |
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262 # cheads = ( (missingheads and ::commonheads) |
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263 # + (commonheads and ::missingheads))" |
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264 # ) |
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265 # |
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266 # while trying to push we already computed the following: |
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267 # common = (::commonheads) |
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268 # missing = ((commonheads::missingheads) - commonheads) |
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269 # |
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270 # We can pick: |
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271 # * missingheads part of common (::commonheads) |
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272 common = set(pushop.outgoing.common) |
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273 nm = pushop.repo.changelog.nodemap |
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274 cheads = [node for node in pushop.revs if nm[node] in common] |
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275 # and |
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276 # * commonheads parents on missing |
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277 revset = unfi.set('%ln and parents(roots(%ln))', |
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278 pushop.outgoing.commonheads, |
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279 pushop.outgoing.missing) |
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280 cheads.extend(c.node() for c in revset) |
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281 pushop.commonheads = cheads |
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282 # even when we don't push, exchanging phase data is useful |
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283 remotephases = pushop.remote.listkeys('phases') |
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284 if (pushop.ui.configbool('ui', '_usedassubrepo', False) |
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285 and remotephases # server supports phases |
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286 and pushop.ret is None # nothing was pushed |
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287 and remotephases.get('publishing', False)): |
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288 # When: |
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289 # - this is a subrepo push |
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290 # - and remote support phase |
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291 # - and no changeset was pushed |
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292 # - and remote is publishing |
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293 # We may be in issue 3871 case! |
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294 # We drop the possible phase synchronisation done by |
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295 # courtesy to publish changesets possibly locally draft |
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296 # on the remote. |
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297 remotephases = {'publishing': 'True'} |
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298 if not remotephases: # old server or public only rer |
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299 _localphasemove(pushop, cheads) |
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300 # don't push any phase data as there is nothing to push |
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301 else: |
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302 ana = phases.analyzeremotephases(pushop.repo, cheads, |
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303 remotephases) |
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304 pheads, droots = ana |
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305 ### Apply remote phase on local |
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306 if remotephases.get('publishing', False): |
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307 _localphasemove(pushop, cheads) |
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308 else: # publish = False |
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309 _localphasemove(pushop, pheads) |
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310 _localphasemove(pushop, cheads, phases.draft) |
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311 ### Apply local phase on remote |
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312 |
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313 # Get the list of all revs draft on remote by public here. |
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314 # XXX Beware that revset break if droots is not strictly |
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315 # XXX root we may want to ensure it is but it is costly |
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316 outdated = unfi.set('heads((%ln::%ln) and public())', |
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317 droots, cheads) |
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318 for newremotehead in outdated: |
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319 r = pushop.remote.pushkey('phases', |
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320 newremotehead.hex(), |
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321 str(phases.draft), |
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322 str(phases.public)) |
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323 if not r: |
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324 pushop.ui.warn(_('updating %s to public failed!\n') |
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325 % newremotehead) |
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326 |
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327 def _localphasemove(pushop, nodes, phase=phases.public): |
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328 """move <nodes> to <phase> in the local source repo""" |
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329 if pushop.locallocked: |
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330 phases.advanceboundary(pushop.repo, phase, nodes) |
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331 else: |
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332 # repo is not locked, do not change any phases! |
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333 # Informs the user that phases should have been moved when |
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334 # applicable. |
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335 actualmoves = [n for n in nodes if phase < pushop.repo[n].phase()] |
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336 phasestr = phases.phasenames[phase] |
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337 if actualmoves: |
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338 pushop.ui.status(_('cannot lock source repo, skipping ' |
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339 'local %s phase update\n') % phasestr) |
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340 |
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341 def _pushobsolete(pushop): |
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342 """utility function to push obsolete markers to a remote""" |
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343 pushop.ui.debug('try to push obsolete markers to remote\n') |
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344 repo = pushop.repo |
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345 remote = pushop.remote |
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346 if (obsolete._enabled and repo.obsstore and |
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347 'obsolete' in remote.listkeys('namespaces')): |
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348 rslts = [] |
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349 remotedata = repo.listkeys('obsolete') |
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350 for key in sorted(remotedata, reverse=True): |
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351 # reverse sort to ensure we end with dump0 |
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352 data = remotedata[key] |
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353 rslts.append(remote.pushkey('obsolete', key, '', data)) |
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354 if [r for r in rslts if not r]: |
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355 msg = _('failed to push some obsolete markers!\n') |
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356 repo.ui.warn(msg) |
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357 |
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358 def _pushbookmark(pushop): |
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359 """Update bookmark position on remote""" |
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360 ui = pushop.ui |
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361 repo = pushop.repo.unfiltered() |
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362 remote = pushop.remote |
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363 ui.debug("checking for updated bookmarks\n") |
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364 revnums = map(repo.changelog.rev, pushop.revs or []) |
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365 ancestors = [a for a in repo.changelog.ancestors(revnums, inclusive=True)] |
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366 (addsrc, adddst, advsrc, advdst, diverge, differ, invalid |
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367 ) = bookmarks.compare(repo, repo._bookmarks, remote.listkeys('bookmarks'), |
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368 srchex=hex) |
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369 |
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370 for b, scid, dcid in advsrc: |
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371 if ancestors and repo[scid].rev() not in ancestors: |
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372 continue |
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373 if remote.pushkey('bookmarks', b, dcid, scid): |
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374 ui.status(_("updating bookmark %s\n") % b) |
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375 else: |
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376 ui.warn(_('updating bookmark %s failed!\n') % b) |
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377 |
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378 class pulloperation(object): |
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379 """A object that represent a single pull operation |
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380 |
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381 It purpose is to carry push related state and very common operation. |
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382 |
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383 A new should be created at the begining of each pull and discarded |
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384 afterward. |
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385 """ |
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386 |
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387 def __init__(self, repo, remote, heads=None, force=False): |
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388 # repo we pull into |
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389 self.repo = repo |
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390 # repo we pull from |
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391 self.remote = remote |
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392 # revision we try to pull (None is "all") |
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393 self.heads = heads |
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394 # do we force pull? |
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395 self.force = force |
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396 # the name the pull transaction |
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397 self._trname = 'pull\n' + util.hidepassword(remote.url()) |
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398 # hold the transaction once created |
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399 self._tr = None |
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400 # set of common changeset between local and remote before pull |
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401 self.common = None |
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402 # set of pulled head |
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403 self.rheads = None |
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404 # list of missing changeset to fetch remotly |
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405 self.fetch = None |
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406 # result of changegroup pulling (used as returng code by pull) |
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407 self.cgresult = None |
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408 # list of step remaining todo (related to future bundle2 usage) |
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409 self.todosteps = set(['changegroup', 'phases', 'obsmarkers']) |
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410 |
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411 @util.propertycache |
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412 def pulledsubset(self): |
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413 """heads of the set of changeset target by the pull""" |
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414 # compute target subset |
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415 if self.heads is None: |
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416 # We pulled every thing possible |
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417 # sync on everything common |
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418 c = set(self.common) |
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419 ret = list(self.common) |
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420 for n in self.rheads: |
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421 if n not in c: |
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422 ret.append(n) |
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423 return ret |
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424 else: |
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425 # We pulled a specific subset |
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426 # sync on this subset |
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427 return self.heads |
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428 |
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429 def gettransaction(self): |
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430 """get appropriate pull transaction, creating it if needed""" |
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431 if self._tr is None: |
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432 self._tr = self.repo.transaction(self._trname) |
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433 return self._tr |
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434 |
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435 def closetransaction(self): |
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436 """close transaction if created""" |
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437 if self._tr is not None: |
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438 self._tr.close() |
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439 |
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440 def releasetransaction(self): |
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441 """release transaction if created""" |
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442 if self._tr is not None: |
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443 self._tr.release() |
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444 |
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445 def pull(repo, remote, heads=None, force=False): |
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446 pullop = pulloperation(repo, remote, heads, force) |
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447 if pullop.remote.local(): |
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448 missing = set(pullop.remote.requirements) - pullop.repo.supported |
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449 if missing: |
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450 msg = _("required features are not" |
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451 " supported in the destination:" |
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452 " %s") % (', '.join(sorted(missing))) |
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453 raise util.Abort(msg) |
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454 |
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455 lock = pullop.repo.lock() |
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456 try: |
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457 _pulldiscovery(pullop) |
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458 if 'changegroup' in pullop.todosteps: |
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459 _pullchangeset(pullop) |
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460 if 'phases' in pullop.todosteps: |
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461 _pullphase(pullop) |
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462 if 'obsmarkers' in pullop.todosteps: |
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463 _pullobsolete(pullop) |
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464 pullop.closetransaction() |
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465 finally: |
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466 pullop.releasetransaction() |
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467 lock.release() |
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468 |
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469 return pullop.cgresult |
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470 |
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471 def _pulldiscovery(pullop): |
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472 """discovery phase for the pull |
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473 |
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474 Current handle changeset discovery only, will change handle all discovery |
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475 at some point.""" |
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476 tmp = discovery.findcommonincoming(pullop.repo.unfiltered(), |
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477 pullop.remote, |
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478 heads=pullop.heads, |
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479 force=pullop.force) |
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480 pullop.common, pullop.fetch, pullop.rheads = tmp |
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481 |
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482 def _pullchangeset(pullop): |
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483 """pull changeset from unbundle into the local repo""" |
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484 # We delay the open of the transaction as late as possible so we |
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485 # don't open transaction for nothing or you break future useful |
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486 # rollback call |
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487 pullop.todosteps.remove('changegroup') |
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488 if not pullop.fetch: |
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489 pullop.repo.ui.status(_("no changes found\n")) |
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490 pullop.cgresult = 0 |
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491 return |
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492 pullop.gettransaction() |
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493 if pullop.heads is None and list(pullop.common) == [nullid]: |
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494 pullop.repo.ui.status(_("requesting all changes\n")) |
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495 elif pullop.heads is None and pullop.remote.capable('changegroupsubset'): |
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496 # issue1320, avoid a race if remote changed after discovery |
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497 pullop.heads = pullop.rheads |
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498 |
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499 if pullop.remote.capable('getbundle'): |
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500 # TODO: get bundlecaps from remote |
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501 cg = pullop.remote.getbundle('pull', common=pullop.common, |
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502 heads=pullop.heads or pullop.rheads) |
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503 elif pullop.heads is None: |
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504 cg = pullop.remote.changegroup(pullop.fetch, 'pull') |
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505 elif not pullop.remote.capable('changegroupsubset'): |
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506 raise util.Abort(_("partial pull cannot be done because " |
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507 "other repository doesn't support " |
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508 "changegroupsubset.")) |
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509 else: |
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510 cg = pullop.remote.changegroupsubset(pullop.fetch, pullop.heads, 'pull') |
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511 pullop.cgresult = changegroup.addchangegroup(pullop.repo, cg, 'pull', |
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512 pullop.remote.url()) |
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513 |
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514 def _pullphase(pullop): |
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515 # Get remote phases data from remote |
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516 pullop.todosteps.remove('phases') |
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517 remotephases = pullop.remote.listkeys('phases') |
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518 publishing = bool(remotephases.get('publishing', False)) |
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519 if remotephases and not publishing: |
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520 # remote is new and unpublishing |
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521 pheads, _dr = phases.analyzeremotephases(pullop.repo, |
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522 pullop.pulledsubset, |
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523 remotephases) |
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524 phases.advanceboundary(pullop.repo, phases.public, pheads) |
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525 phases.advanceboundary(pullop.repo, phases.draft, |
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526 pullop.pulledsubset) |
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527 else: |
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528 # Remote is old or publishing all common changesets |
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529 # should be seen as public |
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530 phases.advanceboundary(pullop.repo, phases.public, |
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531 pullop.pulledsubset) |
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532 |
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533 def _pullobsolete(pullop): |
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534 """utility function to pull obsolete markers from a remote |
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535 |
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536 The `gettransaction` is function that return the pull transaction, creating |
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537 one if necessary. We return the transaction to inform the calling code that |
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538 a new transaction have been created (when applicable). |
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539 |
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540 Exists mostly to allow overriding for experimentation purpose""" |
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541 pullop.todosteps.remove('obsmarkers') |
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542 tr = None |
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543 if obsolete._enabled: |
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544 pullop.repo.ui.debug('fetching remote obsolete markers\n') |
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545 remoteobs = pullop.remote.listkeys('obsolete') |
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546 if 'dump0' in remoteobs: |
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547 tr = pullop.gettransaction() |
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548 for key in sorted(remoteobs, reverse=True): |
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549 if key.startswith('dump'): |
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550 data = base85.b85decode(remoteobs[key]) |
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551 pullop.repo.obsstore.mergemarkers(tr, data) |
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552 pullop.repo.invalidatevolatilesets() |
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553 return tr |
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554 |
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555 def getbundle(repo, source, heads=None, common=None, bundlecaps=None): |
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556 """return a full bundle (with potentially multiple kind of parts) |
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557 |
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558 Could be a bundle HG10 or a bundle HG20 depending on bundlecaps |
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559 passed. For now, the bundle can contain only changegroup, but this will |
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560 changes when more part type will be available for bundle2. |
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561 |
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562 This is different from changegroup.getbundle that only returns an HG10 |
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563 changegroup bundle. They may eventually get reunited in the future when we |
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564 have a clearer idea of the API we what to query different data. |
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565 |
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566 The implementation is at a very early stage and will get massive rework |
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567 when the API of bundle is refined. |
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568 """ |
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569 # build bundle here. |
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570 cg = changegroup.getbundle(repo, source, heads=heads, |
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571 common=common, bundlecaps=None) |
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572 if bundlecaps is None or 'HG20' not in bundlecaps: |
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573 return cg |
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574 # very crude first implementation, |
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575 # the bundle API will change and the generation will be done lazily. |
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576 bundler = bundle2.bundle20(repo.ui) |
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577 tempname = changegroup.writebundle(cg, None, 'HG10UN') |
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578 data = open(tempname).read() |
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579 part = bundle2.part('changegroup', data=data) |
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580 bundler.addpart(part) |
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581 temp = cStringIO.StringIO() |
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582 for c in bundler.getchunks(): |
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583 temp.write(c) |
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584 temp.seek(0) |
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585 return bundle2.unbundle20(repo.ui, temp) |