Mercurial > hg
annotate mercurial/phases.py @ 15695:1b9dcf2eb011
phases: fix advanceboundary behavior when targetphase !=0
Changeset was properly removed from upper phase but was not explicitly added to
target phase. If advanced changesets had not pwasnt in target phase they was
considered public (0-phase).
author | Pierre-Yves David <pierre-yves.david@logilab.fr> |
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date | Mon, 19 Dec 2011 11:29:39 +0100 |
parents | 7fba5a245acc |
children | 0cb45fef99ba |
rev | line source |
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phases: change publish behavior to only alter behavior when server.
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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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15 |
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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 |
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38 local commits are draft by default |
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39 |
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40 Phase movement and exchange |
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41 ============================ |
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42 |
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43 Phase data are exchanged by pushkey on pull and push. Some server have a |
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44 publish option set, we call them publishing server. Pushing to such server make |
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45 draft changeset publish. |
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46 |
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47 A small list of fact/rules define the exchange of phase: |
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48 |
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49 * old client never changes server states |
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50 * pull never changes server states |
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51 * publish and old server csets are seen as public by client |
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52 |
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53 |
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54 Here is the final table summing up the 49 possible usecase of phase exchange: |
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55 |
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56 server |
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57 old publish non-publish |
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58 N X N D P N D P |
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59 old client |
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60 pull |
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61 N - X/X - X/D X/P - X/D X/P |
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62 X - X/X - X/D X/P - X/D X/P |
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63 push |
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64 X X/X X/X X/P X/P X/P X/D X/D X/P |
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65 new client |
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66 pull |
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67 N - P/X - P/D P/P - D/D P/P |
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68 D - P/X - P/D P/P - D/D P/P |
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69 P - P/X - P/D P/P - P/D P/P |
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70 push |
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71 D P/X P/X P/P P/P P/P D/D D/D P/P |
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72 P P/X P/X P/P P/P P/P P/P P/P P/P |
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73 |
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74 Legend: |
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75 |
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76 A/B = final state on client / state on server |
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77 |
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78 * N = new/not present, |
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79 * P = public, |
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80 * D = draft, |
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81 * X = not tracked (ie: the old client or server has no internal way of |
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82 recording the phase.) |
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83 |
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84 passive = only pushes |
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85 |
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86 |
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87 A cell here can be read like this: |
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88 |
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89 "When a new client pushes a draft changeset (D) to a publishing server |
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90 where it's not present (N), it's marked public on both sides (P/P)." |
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91 |
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92 Note: old client behave as publish server with Draft only content |
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93 - other people see it as public |
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94 - content is pushed as draft |
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95 |
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96 """ |
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97 |
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98 import errno |
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99 from node import nullid, bin, hex, short |
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100 from i18n import _ |
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101 |
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102 allphases = range(2) |
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103 trackedphases = allphases[1:] |
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104 |
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105 def readroots(repo): |
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106 """Read phase roots from disk""" |
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107 roots = [set() for i in allphases] |
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108 roots[0].add(nullid) |
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109 try: |
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110 f = repo.sopener('phaseroots') |
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111 try: |
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112 for line in f: |
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113 phase, nh = line.strip().split() |
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114 roots[int(phase)].add(bin(nh)) |
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115 finally: |
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116 f.close() |
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117 except IOError, inst: |
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118 if inst.errno != errno.ENOENT: |
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119 raise |
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120 return roots |
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121 |
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122 def writeroots(repo): |
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123 """Write phase roots from disk""" |
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124 f = repo.sopener('phaseroots', 'w', atomictemp=True) |
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125 try: |
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126 for phase, roots in enumerate(repo._phaseroots): |
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127 for h in roots: |
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128 f.write('%i %s\n' % (phase, hex(h))) |
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129 repo._dirtyphases = False |
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130 finally: |
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131 f.close() |
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132 |
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133 def filterunknown(repo, phaseroots=None): |
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134 """remove unknown nodes from the phase boundary |
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135 |
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136 no data is lost as unknown node only old data for their descentants |
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137 """ |
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138 if phaseroots is None: |
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139 phaseroots = repo._phaseroots |
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140 for phase, nodes in enumerate(phaseroots): |
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141 missing = [node for node in nodes if node not in repo] |
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142 if missing: |
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143 for mnode in missing: |
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144 msg = _('Removing unknown node %(n)s from %(p)i-phase boundary') |
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145 repo.ui.debug(msg, {'n': short(mnode), 'p': phase}) |
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146 nodes.symmetric_difference_update(missing) |
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147 repo._dirtyphases = True |
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148 |
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149 def advanceboundary(repo, targetphase, nodes): |
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150 """Add nodes to a phase changing other nodes phases if necessary. |
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151 |
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152 This function move boundary *forward* this means that all nodes are set |
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153 in the target phase or kept in a *lower* phase. |
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154 |
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155 Simplify boundary to contains phase roots only.""" |
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156 delroots = [] # set of root deleted by this path |
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157 for phase in xrange(targetphase + 1, len(allphases)): |
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158 # filter nodes that are not in a compatible phase already |
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159 # XXX rev phase cache might have been invalidated by a previous loop |
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160 # XXX we need to be smarter here |
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161 nodes = [n for n in nodes if repo[n].phase() >= phase] |
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162 if not nodes: |
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163 break # no roots to move anymore |
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164 roots = repo._phaseroots[phase] |
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165 olds = roots.copy() |
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166 ctxs = list(repo.set('roots((%ln::) - (%ln::%ln))', olds, olds, nodes)) |
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167 roots.clear() |
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168 roots.update(ctx.node() for ctx in ctxs) |
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169 if olds != roots: |
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170 # invalidate cache (we probably could be smarter here |
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171 if '_phaserev' in vars(repo): |
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172 del repo._phaserev |
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173 repo._dirtyphases = True |
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174 # some roots may need to be declared for lower phases |
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175 delroots.extend(olds - roots) |
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176 # declare deleted root in the target phase |
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177 if targetphase != 0: |
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178 retractboundary(repo, targetphase, delroots) |
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179 |
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180 |
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181 def retractboundary(repo, targetphase, nodes): |
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182 """Set nodes back to a phase changing other nodes phases if necessary. |
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183 |
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184 This function move boundary *backward* this means that all nodes are set |
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185 in the target phase or kept in a *higher* phase. |
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186 |
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187 Simplify boundary to contains phase roots only.""" |
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188 currentroots = repo._phaseroots[targetphase] |
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189 newroots = [n for n in nodes if repo[n].phase() < targetphase] |
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190 if newroots: |
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191 currentroots.update(newroots) |
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192 ctxs = repo.set('roots(%ln::)', currentroots) |
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193 currentroots.intersection_update(ctx.node() for ctx in ctxs) |
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194 if '_phaserev' in vars(repo): |
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195 del repo._phaserev |
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196 repo._dirtyphases = True |
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197 |
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198 |
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199 def listphases(repo): |
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200 """List phases root for serialisation over pushkey""" |
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201 keys = {} |
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202 for phase in trackedphases: |
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203 for root in repo._phaseroots[phase]: |
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204 keys[hex(root)] = '%i' % phase |
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205 if repo.ui.configbool('phases', 'publish', True): |
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206 # Add an extra data to let remote know we are a publishing repo. |
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207 # Publishing repo can't just pretend they are old repo. When pushing to |
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208 # a publishing repo, the client still need to push phase boundary |
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209 # |
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210 # Push do not only push changeset. It also push phase data. New |
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211 # phase data may apply to common changeset which won't be push (as they |
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212 # are common). Here is a very simple example: |
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213 # |
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214 # 1) repo A push changeset X as draft to repo B |
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215 # 2) repo B make changeset X public |
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216 # 3) repo B push to repo A. X is not pushed but the data that X as now |
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217 # public should |
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218 # |
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219 # The server can't handle it on it's own as it has no idea of client |
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220 # phase data. |
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221 keys['publishing'] = 'True' |
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222 return keys |
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223 |
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224 def pushphase(repo, nhex, oldphasestr, newphasestr): |
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225 """List phases root for serialisation over pushkey""" |
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226 lock = repo.lock() |
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227 try: |
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228 currentphase = repo[nhex].phase() |
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229 newphase = abs(int(newphasestr)) # let's avoid negative index surprise |
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230 oldphase = abs(int(oldphasestr)) # let's avoid negative index surprise |
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231 if currentphase == oldphase and newphase < oldphase: |
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232 advanceboundary(repo, newphase, [bin(nhex)]) |
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233 return 1 |
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234 else: |
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235 return 0 |
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236 finally: |
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237 lock.release() |
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238 |
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239 def analyzeremotephases(repo, subset, roots): |
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240 """Compute phases heads and root in a subset of node from root dict |
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241 |
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242 * subset is heads of the subset |
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243 * roots is {<nodeid> => phase} mapping. key and value are string. |
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244 |
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245 Accept unknown element input |
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246 """ |
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247 # build list from dictionary |
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248 phaseroots = [[] for p in allphases] |
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249 for nhex, phase in roots.iteritems(): |
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250 if nhex == 'publishing': # ignore data related to publish option |
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251 continue |
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252 node = bin(nhex) |
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253 phase = int(phase) |
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254 if node in repo: |
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255 phaseroots[phase].append(node) |
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256 # compute heads |
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257 phaseheads = [[] for p in allphases] |
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258 for phase in allphases[:-1]: |
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259 toproof = phaseroots[phase + 1] |
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260 revset = repo.set('heads((%ln + parents(%ln)) - (%ln::%ln))', |
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261 subset, toproof, toproof, subset) |
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262 phaseheads[phase].extend(c.node() for c in revset) |
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263 return phaseheads, phaseroots |
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264 |