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annotate mercurial/phases.py @ 16624:3f85cef66dcc

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phases: call filterunknown() in readroots() One less function manipulating localrepo state.
author Patrick Mezard <patrick@mezard.eu>
date Thu, 10 May 2012 18:21:15 +0200
parents 72319bfd7966
children df9df747070d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
15659
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parents: 15649
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1 """ Mercurial phases support code
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2
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3 ---
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4
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5 Copyright 2011 Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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6 Logilab SA <contact@logilab.fr>
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7 Augie Fackler <durin42@gmail.com>
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8
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9 This software may be used and distributed according to the terms of the
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10 GNU General Public License version 2 or any later version.
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11
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12 ---
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13
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14 This module implements most phase logic in mercurial.
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16
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17 Basic Concept
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18 =============
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19
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20 A 'changeset phases' is an indicator that tells us how a changeset is
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21 manipulated and communicated. The details of each phase is described below,
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22 here we describe the properties they have in common.
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23
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24 Like bookmarks, phases are not stored in history and thus are not permanent and
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25 leave no audit trail.
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26
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27 First, no changeset can be in two phases at once. Phases are ordered, so they
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28 can be considered from lowest to highest. The default, lowest phase is 'public'
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29 - this is the normal phase of existing changesets. A child changeset can not be
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30 in a lower phase than its parents.
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31
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32 These phases share a hierarchy of traits:
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33
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34 immutable shared
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35 public: X X
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36 draft: X
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37 secret:
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38
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39 local commits are draft by default
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40
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41 Phase movement and exchange
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42 ============================
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43
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44 Phase data are exchanged by pushkey on pull and push. Some server have a
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45 publish option set, we call them publishing server. Pushing to such server make
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46 draft changeset publish.
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47
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48 A small list of fact/rules define the exchange of phase:
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49
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50 * old client never changes server states
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51 * pull never changes server states
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52 * publish and old server csets are seen as public by client
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53
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54 * Any secret changeset seens in another repository is lowered to at least draft
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55
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56
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57 Here is the final table summing up the 49 possible usecase of phase exchange:
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58
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59 server
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60 old publish non-publish
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61 N X N D P N D P
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62 old client
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63 pull
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64 N - X/X - X/D X/P - X/D X/P
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65 X - X/X - X/D X/P - X/D X/P
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66 push
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67 X X/X X/X X/P X/P X/P X/D X/D X/P
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68 new client
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69 pull
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70 N - P/X - P/D P/P - D/D P/P
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71 D - P/X - P/D P/P - D/D P/P
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72 P - P/X - P/D P/P - P/D P/P
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73 push
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74 D P/X P/X P/P P/P P/P D/D D/D P/P
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75 P P/X P/X P/P P/P P/P P/P P/P P/P
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76
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77 Legend:
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78
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79 A/B = final state on client / state on server
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80
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81 * N = new/not present,
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82 * P = public,
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83 * D = draft,
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84 * X = not tracked (ie: the old client or server has no internal way of
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85 recording the phase.)
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86
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87 passive = only pushes
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88
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89
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90 A cell here can be read like this:
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91
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92 "When a new client pushes a draft changeset (D) to a publishing server
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93 where it's not present (N), it's marked public on both sides (P/P)."
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94
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95 Note: old client behave as publish server with Draft only content
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96 - other people see it as public
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97 - content is pushed as draft
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98
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99 """
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100
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101 import errno
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102 from node import nullid, bin, hex, short
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103 from i18n import _
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104
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105 allphases = public, draft, secret = range(3)
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106 trackedphases = allphases[1:]
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107 phasenames = ['public', 'draft', 'secret']
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108
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109 def _filterunknown(ui, changelog, phaseroots):
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110 """remove unknown nodes from the phase boundary
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111
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112 Nothing is lost as unknown nodes only hold data for their descendants
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113 """
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114 updated = False
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115 nodemap = changelog.nodemap # to filter unknown nodes
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116 for phase, nodes in enumerate(phaseroots):
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117 missing = [node for node in nodes if node not in nodemap]
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118 if missing:
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119 for mnode in missing:
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120 ui.debug(
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121 'removing unknown node %s from %i-phase boundary\n'
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122 % (short(mnode), phase))
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123 nodes.symmetric_difference_update(missing)
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124 updated = True
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125 return updated
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diff changeset
126
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127 def readroots(repo):
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128 """Read phase roots from disk"""
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129 roots = [set() for i in allphases]
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130 try:
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diff changeset
131 f = repo.sopener('phaseroots')
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132 try:
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133 for line in f:
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134 phase, nh = line.split()
15418
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135 roots[int(phase)].add(bin(nh))
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136 finally:
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137 f.close()
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diff changeset
138 except IOError, inst:
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diff changeset
139 if inst.errno != errno.ENOENT:
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140 raise
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141 for f in repo._phasedefaults:
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142 roots = f(repo, roots)
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143 repo._dirtyphases = True
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144 if _filterunknown(repo.ui, repo.changelog, roots):
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145 repo._dirtyphases = True
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146 return roots
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147
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148 def writeroots(repo):
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149 """Write phase roots from disk"""
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150 f = repo.sopener('phaseroots', 'w', atomictemp=True)
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151 try:
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152 for phase, roots in enumerate(repo._phaseroots):
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153 for h in roots:
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154 f.write('%i %s\n' % (phase, hex(h)))
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155 repo._dirtyphases = False
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156 finally:
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157 f.close()
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158
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159 def advanceboundary(repo, targetphase, nodes):
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160 """Add nodes to a phase changing other nodes phases if necessary.
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161
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162 This function move boundary *forward* this means that all nodes are set
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163 in the target phase or kept in a *lower* phase.
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164
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165 Simplify boundary to contains phase roots only."""
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166 delroots = [] # set of root deleted by this path
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167 for phase in xrange(targetphase + 1, len(allphases)):
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168 # filter nodes that are not in a compatible phase already
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169 # XXX rev phase cache might have been invalidated by a previous loop
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170 # XXX we need to be smarter here
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171 nodes = [n for n in nodes if repo[n].phase() >= phase]
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172 if not nodes:
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173 break # no roots to move anymore
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174 roots = repo._phaseroots[phase]
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175 olds = roots.copy()
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176 ctxs = list(repo.set('roots((%ln::) - (%ln::%ln))', olds, olds, nodes))
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177 roots.clear()
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diff changeset
178 roots.update(ctx.node() for ctx in ctxs)
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179 if olds != roots:
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180 # invalidate cache (we probably could be smarter here
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181 if '_phaserev' in vars(repo):
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182 del repo._phaserev
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183 repo._dirtyphases = True
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184 # some roots may need to be declared for lower phases
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185 delroots.extend(olds - roots)
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186 # declare deleted root in the target phase
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187 if targetphase != 0:
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188 retractboundary(repo, targetphase, delroots)
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189
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190
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191 def retractboundary(repo, targetphase, nodes):
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diff changeset
192 """Set nodes back to a phase changing other nodes phases if necessary.
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193
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194 This function move boundary *backward* this means that all nodes are set
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diff changeset
195 in the target phase or kept in a *higher* phase.
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196
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197 Simplify boundary to contains phase roots only."""
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198 currentroots = repo._phaseroots[targetphase]
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199 newroots = [n for n in nodes if repo[n].phase() < targetphase]
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200 if newroots:
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201 currentroots.update(newroots)
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202 ctxs = repo.set('roots(%ln::)', currentroots)
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diff changeset
203 currentroots.intersection_update(ctx.node() for ctx in ctxs)
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diff changeset
204 if '_phaserev' in vars(repo):
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diff changeset
205 del repo._phaserev
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diff changeset
206 repo._dirtyphases = True
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diff changeset
207
15648
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diff changeset
208
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diff changeset
209 def listphases(repo):
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diff changeset
210 """List phases root for serialisation over pushkey"""
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diff changeset
211 keys = {}
15892
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diff changeset
212 value = '%i' % draft
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diff changeset
213 for root in repo._phaseroots[draft]:
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diff changeset
214 keys[hex(root)] = value
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diff changeset
215
15648
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diff changeset
216 if repo.ui.configbool('phases', 'publish', True):
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diff changeset
217 # Add an extra data to let remote know we are a publishing repo.
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diff changeset
218 # Publishing repo can't just pretend they are old repo. When pushing to
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diff changeset
219 # a publishing repo, the client still need to push phase boundary
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diff changeset
220 #
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diff changeset
221 # Push do not only push changeset. It also push phase data. New
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diff changeset
222 # phase data may apply to common changeset which won't be push (as they
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diff changeset
223 # are common). Here is a very simple example:
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diff changeset
224 #
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diff changeset
225 # 1) repo A push changeset X as draft to repo B
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diff changeset
226 # 2) repo B make changeset X public
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diff changeset
227 # 3) repo B push to repo A. X is not pushed but the data that X as now
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diff changeset
228 # public should
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diff changeset
229 #
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diff changeset
230 # The server can't handle it on it's own as it has no idea of client
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diff changeset
231 # phase data.
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diff changeset
232 keys['publishing'] = 'True'
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diff changeset
233 return keys
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diff changeset
234
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diff changeset
235 def pushphase(repo, nhex, oldphasestr, newphasestr):
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diff changeset
236 """List phases root for serialisation over pushkey"""
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diff changeset
237 lock = repo.lock()
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diff changeset
238 try:
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diff changeset
239 currentphase = repo[nhex].phase()
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diff changeset
240 newphase = abs(int(newphasestr)) # let's avoid negative index surprise
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diff changeset
241 oldphase = abs(int(oldphasestr)) # let's avoid negative index surprise
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diff changeset
242 if currentphase == oldphase and newphase < oldphase:
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diff changeset
243 advanceboundary(repo, newphase, [bin(nhex)])
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diff changeset
244 return 1
16051
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parents: 16030
diff changeset
245 elif currentphase == newphase:
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parents: 16030
diff changeset
246 # raced, but got correct result
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Matt Mackall <mpm@selenic.com>
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247 return 1
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248 else:
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249 return 0
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diff changeset
250 finally:
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251 lock.release()
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252
15697
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253 def visibleheads(repo):
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254 """return the set of visible head of this repo"""
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255 # XXX we want a cache on this
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256 sroots = repo._phaseroots[secret]
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257 if sroots:
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258 # XXX very slow revset. storing heads or secret "boundary" would help.
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259 revset = repo.set('heads(not (%ln::))', sroots)
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260
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diff changeset
261 vheads = [ctx.node() for ctx in revset]
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diff changeset
262 if not vheads:
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diff changeset
263 vheads.append(nullid)
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264 else:
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265 vheads = repo.heads()
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266 return vheads
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267
16535
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parents: 16293
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268 def visiblebranchmap(repo):
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269 """return a branchmap for the visible set"""
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270 # XXX Recomputing this data on the fly is very slow. We should build a
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271 # XXX cached version while computin the standard branchmap version.
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272 sroots = repo._phaseroots[secret]
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273 if sroots:
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274 vbranchmap = {}
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275 for branch, nodes in repo.branchmap().iteritems():
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276 # search for secret heads.
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277 for n in nodes:
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278 if repo[n].phase() >= secret:
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279 nodes = None
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diff changeset
280 break
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281 # if secreat heads where found we must compute them again
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282 if nodes is None:
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283 s = repo.set('heads(branch(%s) - secret())', branch)
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284 nodes = [c.node() for c in s]
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285 vbranchmap[branch] = nodes
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286 else:
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diff changeset
287 vbranchmap = repo.branchmap()
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288 return vbranchmap
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289
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290 def analyzeremotephases(repo, subset, roots):
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291 """Compute phases heads and root in a subset of node from root dict
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diff changeset
292
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293 * subset is heads of the subset
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294 * roots is {<nodeid> => phase} mapping. key and value are string.
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diff changeset
295
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diff changeset
296 Accept unknown element input
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297 """
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298 # build list from dictionary
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diff changeset
299 draftroots = []
15902
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Sune Foldager <cryo@cyanite.org>
parents: 15892
diff changeset
300 nodemap = repo.changelog.nodemap # to filter unknown nodes
15649
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parents: 15648
diff changeset
301 for nhex, phase in roots.iteritems():
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parents: 15648
diff changeset
302 if nhex == 'publishing': # ignore data related to publish option
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diff changeset
303 continue
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diff changeset
304 node = bin(nhex)
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diff changeset
305 phase = int(phase)
15892
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diff changeset
306 if phase == 0:
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diff changeset
307 if node != nullid:
15953
52dc2b33d0be phase: fix warning text from invalid remote phase
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parents: 15948
diff changeset
308 repo.ui.warn(_('ignoring inconsistent public root'
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parents: 15948
diff changeset
309 ' from remote: %s\n') % nhex)
15892
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parents: 15821
diff changeset
310 elif phase == 1:
15902
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diff changeset
311 if node in nodemap:
15892
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diff changeset
312 draftroots.append(node)
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diff changeset
313 else:
15953
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diff changeset
314 repo.ui.warn(_('ignoring unexpected root from remote: %i %s\n')
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parents: 15948
diff changeset
315 % (phase, nhex))
15649
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diff changeset
316 # compute heads
15954
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diff changeset
317 publicheads = newheads(repo, subset, draftroots)
15892
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diff changeset
318 return publicheads, draftroots
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diff changeset
319
15954
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diff changeset
320 def newheads(repo, heads, roots):
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diff changeset
321 """compute new head of a subset minus another
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parents: 15953
diff changeset
322
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parents: 15953
diff changeset
323 * `heads`: define the first subset
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parents: 15953
diff changeset
324 * `rroots`: define the second we substract to the first"""
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parents: 15953
diff changeset
325 revset = repo.set('heads((%ln + parents(%ln)) - (%ln::%ln))',
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parents: 15953
diff changeset
326 heads, roots, roots, heads)
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parents: 15953
diff changeset
327 return [c.node() for c in revset]
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parents: 15953
diff changeset
328
16030
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Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 16025
diff changeset
329
308406677e9d phases: allow phase name in phases.new-commit settings
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parents: 16025
diff changeset
330 def newcommitphase(ui):
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parents: 16025
diff changeset
331 """helper to get the target phase of new commit
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parents: 16025
diff changeset
332
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parents: 16025
diff changeset
333 Handle all possible values for the phases.new-commit options.
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parents: 16025
diff changeset
334
308406677e9d phases: allow phase name in phases.new-commit settings
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 16025
diff changeset
335 """
308406677e9d phases: allow phase name in phases.new-commit settings
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parents: 16025
diff changeset
336 v = ui.config('phases', 'new-commit', draft)
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parents: 16025
diff changeset
337 try:
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parents: 16025
diff changeset
338 return phasenames.index(v)
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parents: 16025
diff changeset
339 except ValueError:
308406677e9d phases: allow phase name in phases.new-commit settings
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parents: 16025
diff changeset
340 try:
308406677e9d phases: allow phase name in phases.new-commit settings
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parents: 16025
diff changeset
341 return int(v)
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parents: 16025
diff changeset
342 except ValueError:
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Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 16025
diff changeset
343 msg = _("phases.new-commit: not a valid phase name ('%s')")
308406677e9d phases: allow phase name in phases.new-commit settings
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parents: 16025
diff changeset
344 raise error.ConfigError(msg % v)
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parents: 16025
diff changeset
345