Mercurial > hg
annotate mercurial/phases.py @ 31758:04ec317b8128
hgweb: expose a followlines UI in filerevision view
In filerevision view (/file/<rev>/<fname>) we add some event listeners on
mouse clicks of <span> elements in the <pre class="sourcelines"> block.
Those listeners will capture a range of lines selected between two mouse
clicks and a box inviting to follow the history of selected lines will then
show up. Selected lines (i.e. the block of lines) get a CSS class which make
them highlighted. Selection can be cancelled (and restarted) by either
clicking on the cancel ("x") button in the invite box or clicking on any other
source line. Also clicking twice on the same line will abort the selection and
reset event listeners to restart the process.
As a first step, this action is only advertised by the "cursor: cell" CSS rule
on source lines elements as any other mechanisms would make the code
significantly more complicated. This might be improved later.
All JavaScript code lives in a new "linerangelog.js" file, sourced in
filerevision template (only in "paper" style for now).
author | Denis Laxalde <denis.laxalde@logilab.fr> |
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date | Wed, 29 Mar 2017 22:26:16 +0200 |
parents | 1470b0f771c8 |
children | 511a62669f1b |
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 |
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10 of the 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 phase' 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 |
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22 below, 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 |
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25 permanent and 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, |
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28 so they can be considered from lowest to highest. The default, lowest |
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29 phase is 'public' - this is the normal phase of existing changesets. A |
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30 child changeset can not be 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 is exchanged by pushkey on pull and push. Some servers have |
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45 a publish option set, we call such a server a "publishing server". |
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46 Pushing a draft changeset to a publishing server changes the phase to |
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47 public. |
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48 |
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49 A small list of fact/rules define the exchange of phase: |
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50 |
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51 * old client never changes server states |
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52 * pull never changes server states |
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53 * publish and old server changesets are seen as public by client |
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54 * any secret changeset seen in another repository is lowered to at |
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55 least draft |
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56 |
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57 Here is the final table summing up the 49 possible use cases of phase |
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58 exchange: |
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59 |
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60 server |
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61 old publish non-publish |
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62 N X N D P N D P |
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63 old client |
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64 pull |
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65 N - X/X - X/D X/P - X/D X/P |
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66 X - X/X - X/D X/P - X/D X/P |
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67 push |
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68 X X/X X/X X/P X/P X/P X/D X/D X/P |
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69 new client |
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70 pull |
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71 N - P/X - P/D P/P - D/D P/P |
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72 D - P/X - P/D P/P - D/D P/P |
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73 P - P/X - P/D P/P - P/D P/P |
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74 push |
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75 D P/X P/X P/P P/P P/P D/D D/D P/P |
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76 P P/X P/X P/P P/P P/P P/P P/P P/P |
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77 |
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78 Legend: |
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79 |
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80 A/B = final state on client / state on server |
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81 |
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82 * N = new/not present, |
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83 * P = public, |
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84 * D = draft, |
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85 * X = not tracked (i.e., the old client or server has no internal |
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86 way of recording the phase.) |
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87 |
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88 passive = only pushes |
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89 |
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90 |
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91 A cell here can be read like this: |
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92 |
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93 "When a new client pushes a draft changeset (D) to a publishing |
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94 server where it's not present (N), it's marked public on both |
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95 sides (P/P)." |
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96 |
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97 Note: old client behave as a publishing server with draft only content |
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98 - other people see it as public |
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99 - content is pushed as draft |
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100 |
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101 """ |
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102 |
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103 from __future__ import absolute_import |
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104 |
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105 import errno |
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106 |
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107 from .i18n import _ |
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108 from .node import ( |
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109 bin, |
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110 hex, |
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111 nullid, |
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112 nullrev, |
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113 short, |
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114 ) |
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115 from . import ( |
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116 error, |
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117 smartset, |
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118 txnutil, |
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119 ) |
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120 |
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121 allphases = public, draft, secret = range(3) |
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122 trackedphases = allphases[1:] |
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123 phasenames = ['public', 'draft', 'secret'] |
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124 |
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125 def _readroots(repo, phasedefaults=None): |
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126 """Read phase roots from disk |
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127 |
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128 phasedefaults is a list of fn(repo, roots) callable, which are |
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129 executed if the phase roots file does not exist. When phases are |
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130 being initialized on an existing repository, this could be used to |
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131 set selected changesets phase to something else than public. |
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132 |
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133 Return (roots, dirty) where dirty is true if roots differ from |
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134 what is being stored. |
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135 """ |
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136 repo = repo.unfiltered() |
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137 dirty = False |
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138 roots = [set() for i in allphases] |
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139 try: |
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140 f, pending = txnutil.trypending(repo.root, repo.svfs, 'phaseroots') |
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141 try: |
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142 for line in f: |
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143 phase, nh = line.split() |
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144 roots[int(phase)].add(bin(nh)) |
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145 finally: |
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146 f.close() |
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147 except IOError as inst: |
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148 if inst.errno != errno.ENOENT: |
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149 raise |
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150 if phasedefaults: |
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151 for f in phasedefaults: |
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152 roots = f(repo, roots) |
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153 dirty = True |
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154 return roots, dirty |
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155 |
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156 class phasecache(object): |
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157 def __init__(self, repo, phasedefaults, _load=True): |
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158 if _load: |
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159 # Cheap trick to allow shallow-copy without copy module |
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160 self.phaseroots, self.dirty = _readroots(repo, phasedefaults) |
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161 self._phaserevs = None |
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162 self._phasesets = None |
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163 self.filterunknown(repo) |
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164 self.opener = repo.svfs |
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165 |
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166 def getrevset(self, repo, phases): |
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167 """return a smartset for the given phases""" |
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168 self.loadphaserevs(repo) # ensure phase's sets are loaded |
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169 |
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170 if self._phasesets and all(self._phasesets[p] is not None |
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171 for p in phases): |
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172 # fast path - use _phasesets |
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173 revs = self._phasesets[phases[0]] |
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174 if len(phases) > 1: |
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175 revs = revs.copy() # only copy when needed |
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176 for p in phases[1:]: |
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177 revs.update(self._phasesets[p]) |
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178 if repo.changelog.filteredrevs: |
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179 revs = revs - repo.changelog.filteredrevs |
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180 return smartset.baseset(revs) |
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181 else: |
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182 # slow path - enumerate all revisions |
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183 phase = self.phase |
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184 revs = (r for r in repo if phase(repo, r) in phases) |
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185 return smartset.generatorset(revs, iterasc=True) |
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186 |
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187 def copy(self): |
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188 # Shallow copy meant to ensure isolation in |
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189 # advance/retractboundary(), nothing more. |
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190 ph = self.__class__(None, None, _load=False) |
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191 ph.phaseroots = self.phaseroots[:] |
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192 ph.dirty = self.dirty |
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193 ph.opener = self.opener |
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194 ph._phaserevs = self._phaserevs |
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195 ph._phasesets = self._phasesets |
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196 return ph |
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197 |
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198 def replace(self, phcache): |
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199 """replace all values in 'self' with content of phcache""" |
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200 for a in ('phaseroots', 'dirty', 'opener', '_phaserevs', '_phasesets'): |
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201 setattr(self, a, getattr(phcache, a)) |
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202 |
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203 def _getphaserevsnative(self, repo): |
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204 repo = repo.unfiltered() |
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205 nativeroots = [] |
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206 for phase in trackedphases: |
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207 nativeroots.append(map(repo.changelog.rev, self.phaseroots[phase])) |
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208 return repo.changelog.computephases(nativeroots) |
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209 |
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210 def _computephaserevspure(self, repo): |
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211 repo = repo.unfiltered() |
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212 revs = [public] * len(repo.changelog) |
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213 self._phaserevs = revs |
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214 self._populatephaseroots(repo) |
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215 for phase in trackedphases: |
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216 roots = list(map(repo.changelog.rev, self.phaseroots[phase])) |
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217 if roots: |
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218 for rev in roots: |
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219 revs[rev] = phase |
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220 for rev in repo.changelog.descendants(roots): |
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221 revs[rev] = phase |
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222 |
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223 def loadphaserevs(self, repo): |
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224 """ensure phase information is loaded in the object""" |
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225 if self._phaserevs is None: |
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226 try: |
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227 res = self._getphaserevsnative(repo) |
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228 self._phaserevs, self._phasesets = res |
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229 except AttributeError: |
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230 self._computephaserevspure(repo) |
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231 |
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232 def invalidate(self): |
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233 self._phaserevs = None |
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234 self._phasesets = None |
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235 |
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236 def _populatephaseroots(self, repo): |
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237 """Fills the _phaserevs cache with phases for the roots. |
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238 """ |
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239 cl = repo.changelog |
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240 phaserevs = self._phaserevs |
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241 for phase in trackedphases: |
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242 roots = map(cl.rev, self.phaseroots[phase]) |
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243 for root in roots: |
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244 phaserevs[root] = phase |
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245 |
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246 def phase(self, repo, rev): |
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247 # We need a repo argument here to be able to build _phaserevs |
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248 # if necessary. The repository instance is not stored in |
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249 # phasecache to avoid reference cycles. The changelog instance |
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250 # is not stored because it is a filecache() property and can |
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251 # be replaced without us being notified. |
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252 if rev == nullrev: |
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253 return public |
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254 if rev < nullrev: |
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255 raise ValueError(_('cannot lookup negative revision')) |
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256 if self._phaserevs is None or rev >= len(self._phaserevs): |
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257 self.invalidate() |
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258 self.loadphaserevs(repo) |
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259 return self._phaserevs[rev] |
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260 |
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261 def write(self): |
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262 if not self.dirty: |
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263 return |
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264 f = self.opener('phaseroots', 'w', atomictemp=True, checkambig=True) |
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265 try: |
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266 self._write(f) |
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267 finally: |
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268 f.close() |
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269 |
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270 def _write(self, fp): |
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271 for phase, roots in enumerate(self.phaseroots): |
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272 for h in roots: |
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273 fp.write('%i %s\n' % (phase, hex(h))) |
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274 self.dirty = False |
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275 |
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276 def _updateroots(self, phase, newroots, tr): |
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277 self.phaseroots[phase] = newroots |
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278 self.invalidate() |
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279 self.dirty = True |
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280 |
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281 tr.addfilegenerator('phase', ('phaseroots',), self._write) |
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282 tr.hookargs['phases_moved'] = '1' |
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283 |
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284 def advanceboundary(self, repo, tr, targetphase, nodes): |
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285 # Be careful to preserve shallow-copied values: do not update |
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286 # phaseroots values, replace them. |
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287 |
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288 repo = repo.unfiltered() |
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289 delroots = [] # set of root deleted by this path |
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290 for phase in xrange(targetphase + 1, len(allphases)): |
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291 # filter nodes that are not in a compatible phase already |
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292 nodes = [n for n in nodes |
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293 if self.phase(repo, repo[n].rev()) >= phase] |
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294 if not nodes: |
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295 break # no roots to move anymore |
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296 olds = self.phaseroots[phase] |
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297 roots = set(ctx.node() for ctx in repo.set( |
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298 'roots((%ln::) - (%ln::%ln))', olds, olds, nodes)) |
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299 if olds != roots: |
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300 self._updateroots(phase, roots, tr) |
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301 # some roots may need to be declared for lower phases |
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302 delroots.extend(olds - roots) |
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303 # declare deleted root in the target phase |
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304 if targetphase != 0: |
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305 self.retractboundary(repo, tr, targetphase, delroots) |
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306 repo.invalidatevolatilesets() |
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307 |
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308 def retractboundary(self, repo, tr, targetphase, nodes): |
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309 # Be careful to preserve shallow-copied values: do not update |
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310 # phaseroots values, replace them. |
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311 |
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312 repo = repo.unfiltered() |
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313 currentroots = self.phaseroots[targetphase] |
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314 newroots = [n for n in nodes |
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315 if self.phase(repo, repo[n].rev()) < targetphase] |
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316 if newroots: |
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317 if nullid in newroots: |
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318 raise error.Abort(_('cannot change null revision phase')) |
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319 currentroots = currentroots.copy() |
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320 currentroots.update(newroots) |
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321 |
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322 # Only compute new roots for revs above the roots that are being |
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323 # retracted. |
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324 minnewroot = min(repo[n].rev() for n in newroots) |
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325 aboveroots = [n for n in currentroots |
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326 if repo[n].rev() >= minnewroot] |
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327 updatedroots = repo.set('roots(%ln::)', aboveroots) |
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328 |
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329 finalroots = set(n for n in currentroots if repo[n].rev() < |
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330 minnewroot) |
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331 finalroots.update(ctx.node() for ctx in updatedroots) |
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332 |
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333 self._updateroots(targetphase, finalroots, tr) |
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334 repo.invalidatevolatilesets() |
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335 |
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336 def filterunknown(self, repo): |
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337 """remove unknown nodes from the phase boundary |
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338 |
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339 Nothing is lost as unknown nodes only hold data for their descendants. |
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340 """ |
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341 filtered = False |
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342 nodemap = repo.changelog.nodemap # to filter unknown nodes |
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343 for phase, nodes in enumerate(self.phaseroots): |
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344 missing = sorted(node for node in nodes if node not in nodemap) |
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345 if missing: |
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346 for mnode in missing: |
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347 repo.ui.debug( |
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348 'removing unknown node %s from %i-phase boundary\n' |
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349 % (short(mnode), phase)) |
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350 nodes.symmetric_difference_update(missing) |
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351 filtered = True |
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352 if filtered: |
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353 self.dirty = True |
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354 # filterunknown is called by repo.destroyed, we may have no changes in |
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355 # root but phaserevs contents is certainly invalid (or at least we |
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356 # have not proper way to check that). related to issue 3858. |
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357 # |
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358 # The other caller is __init__ that have no _phaserevs initialized |
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359 # anyway. If this change we should consider adding a dedicated |
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360 # "destroyed" function to phasecache or a proper cache key mechanism |
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361 # (see branchmap one) |
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362 self.invalidate() |
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363 |
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364 def advanceboundary(repo, tr, targetphase, nodes): |
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365 """Add nodes to a phase changing other nodes phases if necessary. |
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366 |
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367 This function move boundary *forward* this means that all nodes |
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368 are set in the target phase or kept in a *lower* phase. |
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369 |
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370 Simplify boundary to contains phase roots only.""" |
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371 phcache = repo._phasecache.copy() |
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372 phcache.advanceboundary(repo, tr, targetphase, nodes) |
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373 repo._phasecache.replace(phcache) |
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374 |
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375 def retractboundary(repo, tr, targetphase, nodes): |
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376 """Set nodes back to a phase changing other nodes phases if |
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377 necessary. |
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378 |
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379 This function move boundary *backward* this means that all nodes |
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380 are set in the target phase or kept in a *higher* phase. |
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381 |
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382 Simplify boundary to contains phase roots only.""" |
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383 phcache = repo._phasecache.copy() |
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384 phcache.retractboundary(repo, tr, targetphase, nodes) |
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385 repo._phasecache.replace(phcache) |
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386 |
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387 def listphases(repo): |
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388 """List phases root for serialization over pushkey""" |
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389 keys = {} |
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390 value = '%i' % draft |
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391 for root in repo._phasecache.phaseroots[draft]: |
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392 keys[hex(root)] = value |
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393 |
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394 if repo.publishing(): |
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395 # Add an extra data to let remote know we are a publishing |
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396 # repo. Publishing repo can't just pretend they are old repo. |
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397 # When pushing to a publishing repo, the client still need to |
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398 # push phase boundary |
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399 # |
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400 # Push do not only push changeset. It also push phase data. |
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401 # New phase data may apply to common changeset which won't be |
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402 # push (as they are common). Here is a very simple example: |
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403 # |
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404 # 1) repo A push changeset X as draft to repo B |
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405 # 2) repo B make changeset X public |
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406 # 3) repo B push to repo A. X is not pushed but the data that |
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407 # X as now public should |
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408 # |
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409 # The server can't handle it on it's own as it has no idea of |
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410 # client phase data. |
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411 keys['publishing'] = 'True' |
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412 return keys |
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413 |
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414 def pushphase(repo, nhex, oldphasestr, newphasestr): |
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416 repo = repo.unfiltered() |
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417 with repo.lock(): |
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418 currentphase = repo[nhex].phase() |
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419 newphase = abs(int(newphasestr)) # let's avoid negative index surprise |
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420 oldphase = abs(int(oldphasestr)) # let's avoid negative index surprise |
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421 if currentphase == oldphase and newphase < oldphase: |
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422 with repo.transaction('pushkey-phase') as tr: |
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423 advanceboundary(repo, tr, newphase, [bin(nhex)]) |
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424 return 1 |
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425 elif currentphase == newphase: |
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426 # raced, but got correct result |
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427 return 1 |
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428 else: |
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429 return 0 |
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430 |
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431 def analyzeremotephases(repo, subset, roots): |
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432 """Compute phases heads and root in a subset of node from root dict |
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433 |
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434 * subset is heads of the subset |
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435 * roots is {<nodeid> => phase} mapping. key and value are string. |
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436 |
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437 Accept unknown element input |
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438 """ |
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439 repo = repo.unfiltered() |
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440 # build list from dictionary |
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441 draftroots = [] |
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442 nodemap = repo.changelog.nodemap # to filter unknown nodes |
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443 for nhex, phase in roots.iteritems(): |
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444 if nhex == 'publishing': # ignore data related to publish option |
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445 continue |
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446 node = bin(nhex) |
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447 phase = int(phase) |
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448 if phase == public: |
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449 if node != nullid: |
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450 repo.ui.warn(_('ignoring inconsistent public root' |
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451 ' from remote: %s\n') % nhex) |
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452 elif phase == draft: |
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453 if node in nodemap: |
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454 draftroots.append(node) |
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455 else: |
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456 repo.ui.warn(_('ignoring unexpected root from remote: %i %s\n') |
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457 % (phase, nhex)) |
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458 # compute heads |
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459 publicheads = newheads(repo, subset, draftroots) |
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460 return publicheads, draftroots |
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461 |
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462 def newheads(repo, heads, roots): |
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463 """compute new head of a subset minus another |
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464 |
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465 * `heads`: define the first subset |
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466 * `roots`: define the second we subtract from the first""" |
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467 repo = repo.unfiltered() |
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468 revset = repo.set('heads((%ln + parents(%ln)) - (%ln::%ln))', |
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469 heads, roots, roots, heads) |
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470 return [c.node() for c in revset] |
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471 |
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472 |
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473 def newcommitphase(ui): |
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474 """helper to get the target phase of new commit |
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475 |
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476 Handle all possible values for the phases.new-commit options. |
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477 |
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478 """ |
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479 v = ui.config('phases', 'new-commit', draft) |
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480 try: |
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481 return phasenames.index(v) |
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482 except ValueError: |
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483 try: |
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484 return int(v) |
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485 except ValueError: |
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486 msg = _("phases.new-commit: not a valid phase name ('%s')") |
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487 raise error.ConfigError(msg % v) |
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488 |
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489 def hassecret(repo): |
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490 """utility function that check if a repo have any secret changeset.""" |
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491 return bool(repo._phasecache.phaseroots[2]) |