Mercurial > hg
annotate mercurial/phases.py @ 15711:c51c9dc13a58
cygwin: add cygwin specific normcase logic
in cygwin environment, mount point part of path is treated as case
sensitive, even though underlying NTFS is case insensitive.
this patch preserves mount point part of specified path, only if it is
absolute one.
there is no easy way to get list of current mount points from python
program, other than to execute "mount" external command, because
cygwin does not store current mount points into Unix/Linux like
/etc/XXXtab file.
so, this patch introduces cygwinmountpoints variable to list mount
points to be preserved case.
this allows some other extensions to customize mount point
configuration.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Fri, 16 Dec 2011 21:21:08 +0900 |
parents | e34f4d1f0dbb |
children | 57241845a4bb |
rev | line source |
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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 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 = range(3) |
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106 trackedphases = allphases[1:] |
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107 |
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108 def readroots(repo): |
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109 """Read phase roots from disk""" |
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110 roots = [set() for i in allphases] |
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111 roots[0].add(nullid) |
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112 try: |
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113 f = repo.sopener('phaseroots') |
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114 try: |
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115 for line in f: |
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116 phase, nh = line.strip().split() |
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117 roots[int(phase)].add(bin(nh)) |
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118 finally: |
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119 f.close() |
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120 except IOError, inst: |
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121 if inst.errno != errno.ENOENT: |
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122 raise |
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123 return roots |
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124 |
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125 def writeroots(repo): |
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126 """Write phase roots from disk""" |
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127 f = repo.sopener('phaseroots', 'w', atomictemp=True) |
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128 try: |
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129 for phase, roots in enumerate(repo._phaseroots): |
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130 for h in roots: |
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131 f.write('%i %s\n' % (phase, hex(h))) |
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132 repo._dirtyphases = False |
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133 finally: |
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134 f.close() |
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135 |
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136 def filterunknown(repo, phaseroots=None): |
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137 """remove unknown nodes from the phase boundary |
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138 |
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139 no data is lost as unknown node only old data for their descentants |
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140 """ |
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141 if phaseroots is None: |
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142 phaseroots = repo._phaseroots |
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143 for phase, nodes in enumerate(phaseroots): |
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144 missing = [node for node in nodes if node not in repo] |
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145 if missing: |
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146 for mnode in missing: |
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147 msg = _('Removing unknown node %(n)s from %(p)i-phase boundary') |
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148 repo.ui.debug(msg, {'n': short(mnode), 'p': phase}) |
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149 nodes.symmetric_difference_update(missing) |
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150 repo._dirtyphases = True |
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151 |
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152 def advanceboundary(repo, targetphase, nodes): |
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153 """Add nodes to a phase changing other nodes phases if necessary. |
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154 |
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155 This function move boundary *forward* this means that all nodes are set |
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156 in the target phase or kept in a *lower* phase. |
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157 |
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158 Simplify boundary to contains phase roots only.""" |
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159 delroots = [] # set of root deleted by this path |
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160 for phase in xrange(targetphase + 1, len(allphases)): |
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161 # filter nodes that are not in a compatible phase already |
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162 # XXX rev phase cache might have been invalidated by a previous loop |
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163 # XXX we need to be smarter here |
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164 nodes = [n for n in nodes if repo[n].phase() >= phase] |
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165 if not nodes: |
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166 break # no roots to move anymore |
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167 roots = repo._phaseroots[phase] |
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168 olds = roots.copy() |
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169 ctxs = list(repo.set('roots((%ln::) - (%ln::%ln))', olds, olds, nodes)) |
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170 roots.clear() |
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171 roots.update(ctx.node() for ctx in ctxs) |
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172 if olds != roots: |
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173 # invalidate cache (we probably could be smarter here |
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174 if '_phaserev' in vars(repo): |
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175 del repo._phaserev |
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176 repo._dirtyphases = True |
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177 # some roots may need to be declared for lower phases |
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178 delroots.extend(olds - roots) |
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179 # declare deleted root in the target phase |
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180 if targetphase != 0: |
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181 retractboundary(repo, targetphase, delroots) |
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182 |
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183 |
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184 def retractboundary(repo, targetphase, nodes): |
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185 """Set nodes back to a phase changing other nodes phases if necessary. |
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186 |
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187 This function move boundary *backward* this means that all nodes are set |
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188 in the target phase or kept in a *higher* phase. |
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189 |
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190 Simplify boundary to contains phase roots only.""" |
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191 currentroots = repo._phaseroots[targetphase] |
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192 newroots = [n for n in nodes if repo[n].phase() < targetphase] |
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193 if newroots: |
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194 currentroots.update(newroots) |
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195 ctxs = repo.set('roots(%ln::)', currentroots) |
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196 currentroots.intersection_update(ctx.node() for ctx in ctxs) |
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197 if '_phaserev' in vars(repo): |
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198 del repo._phaserev |
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199 repo._dirtyphases = True |
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200 |
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201 |
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202 def listphases(repo): |
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203 """List phases root for serialisation over pushkey""" |
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204 keys = {} |
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205 for phase in trackedphases: |
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206 for root in repo._phaseroots[phase]: |
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207 keys[hex(root)] = '%i' % phase |
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208 if repo.ui.configbool('phases', 'publish', True): |
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209 # Add an extra data to let remote know we are a publishing repo. |
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210 # Publishing repo can't just pretend they are old repo. When pushing to |
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211 # a publishing repo, the client still need to push phase boundary |
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212 # |
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213 # Push do not only push changeset. It also push phase data. New |
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214 # phase data may apply to common changeset which won't be push (as they |
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215 # are common). Here is a very simple example: |
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216 # |
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217 # 1) repo A push changeset X as draft to repo B |
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218 # 2) repo B make changeset X public |
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219 # 3) repo B push to repo A. X is not pushed but the data that X as now |
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220 # public should |
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221 # |
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222 # The server can't handle it on it's own as it has no idea of client |
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223 # phase data. |
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224 keys['publishing'] = 'True' |
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225 return keys |
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226 |
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227 def pushphase(repo, nhex, oldphasestr, newphasestr): |
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228 """List phases root for serialisation over pushkey""" |
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229 lock = repo.lock() |
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230 try: |
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231 currentphase = repo[nhex].phase() |
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232 newphase = abs(int(newphasestr)) # let's avoid negative index surprise |
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233 oldphase = abs(int(oldphasestr)) # let's avoid negative index surprise |
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234 if currentphase == oldphase and newphase < oldphase: |
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235 advanceboundary(repo, newphase, [bin(nhex)]) |
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236 return 1 |
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237 else: |
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238 return 0 |
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239 finally: |
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240 lock.release() |
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241 |
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242 def visibleheads(repo): |
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243 """return the set of visible head of this repo""" |
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244 # XXX we want a cache on this |
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245 sroots = repo._phaseroots[2] |
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246 if sroots: |
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247 # XXX very slow revset. storing heads or secret "boundary" would help. |
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248 revset = repo.set('heads(not (%ln::))', sroots) |
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249 |
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250 vheads = [ctx.node() for ctx in revset] |
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251 if not vheads: |
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252 vheads.append(nullid) |
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253 else: |
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254 vheads = repo.heads() |
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255 return vheads |
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256 |
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257 def analyzeremotephases(repo, subset, roots): |
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258 """Compute phases heads and root in a subset of node from root dict |
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259 |
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260 * subset is heads of the subset |
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261 * roots is {<nodeid> => phase} mapping. key and value are string. |
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262 |
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263 Accept unknown element input |
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264 """ |
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265 # build list from dictionary |
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266 phaseroots = [[] for p in allphases] |
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267 for nhex, phase in roots.iteritems(): |
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268 if nhex == 'publishing': # ignore data related to publish option |
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269 continue |
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270 node = bin(nhex) |
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271 phase = int(phase) |
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272 if node in repo: |
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273 phaseroots[phase].append(node) |
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274 # compute heads |
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275 phaseheads = [[] for p in allphases] |
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276 for phase in allphases[:-1]: |
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277 toproof = phaseroots[phase + 1] |
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278 revset = repo.set('heads((%ln + parents(%ln)) - (%ln::%ln))', |
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279 subset, toproof, toproof, subset) |
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280 phaseheads[phase].extend(c.node() for c in revset) |
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281 return phaseheads, phaseroots |
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282 |