Mercurial > hg
annotate mercurial/obsolete.py @ 21707:e22cfd1ae97c stable
keyword: suppress keyword expansion while 'hg histedit' for internal merge
Before this patch, 'hg histedit' may cause unexpected conflict, if 'hg
histedit'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg histedit' for
internal merge by adding 'histedit' to 'restricted' command list like
'merge'.
Test in this patch just swaps order of revision #13 and #14: this is
enough to cause internal merge.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Thu, 05 Jun 2014 16:47:14 +0900 |
parents | bf2891877378 |
children | a56038e6a3c9 b27c3beaaf30 |
rev | line source |
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1 # obsolete.py - obsolete markers handling |
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2 # |
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3 # Copyright 2012 Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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4 # Logilab SA <contact@logilab.fr> |
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5 # |
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6 # This software may be used and distributed according to the terms of the |
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7 # GNU General Public License version 2 or any later version. |
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8 |
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9 """Obsolete marker handling |
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10 |
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11 An obsolete marker maps an old changeset to a list of new |
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12 changesets. If the list of new changesets is empty, the old changeset |
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13 is said to be "killed". Otherwise, the old changeset is being |
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14 "replaced" by the new changesets. |
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15 |
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16 Obsolete markers can be used to record and distribute changeset graph |
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17 transformations performed by history rewrite operations, and help |
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18 building new tools to reconcile conflicting rewrite actions. To |
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19 facilitate conflict resolution, markers include various annotations |
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20 besides old and news changeset identifiers, such as creation date or |
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21 author name. |
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22 |
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23 The old obsoleted changeset is called a "precursor" and possible |
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24 replacements are called "successors". Markers that used changeset X as |
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25 a precursor are called "successor markers of X" because they hold |
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26 information about the successors of X. Markers that use changeset Y as |
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27 a successors are call "precursor markers of Y" because they hold |
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28 information about the precursors of Y. |
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29 |
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30 Examples: |
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31 |
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32 - When changeset A is replaced by changeset A', one marker is stored: |
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33 |
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34 (A, (A',)) |
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35 |
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36 - When changesets A and B are folded into a new changeset C, two markers are |
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37 stored: |
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38 |
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39 (A, (C,)) and (B, (C,)) |
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40 |
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41 - When changeset A is simply "pruned" from the graph, a marker is created: |
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42 |
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43 (A, ()) |
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44 |
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45 - When changeset A is split into B and C, a single marker are used: |
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46 |
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47 (A, (C, C)) |
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48 |
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49 We use a single marker to distinguish the "split" case from the "divergence" |
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50 case. If two independent operations rewrite the same changeset A in to A' and |
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51 A'', we have an error case: divergent rewriting. We can detect it because |
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52 two markers will be created independently: |
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53 |
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54 (A, (B,)) and (A, (C,)) |
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55 |
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56 Format |
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57 ------ |
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58 |
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59 Markers are stored in an append-only file stored in |
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60 '.hg/store/obsstore'. |
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61 |
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62 The file starts with a version header: |
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63 |
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64 - 1 unsigned byte: version number, starting at zero. |
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65 |
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66 |
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67 The header is followed by the markers. Each marker is made of: |
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68 |
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69 - 1 unsigned byte: number of new changesets "N", can be zero. |
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70 |
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71 - 1 unsigned 32-bits integer: metadata size "M" in bytes. |
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72 |
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73 - 1 byte: a bit field. It is reserved for flags used in common |
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74 obsolete marker operations, to avoid repeated decoding of metadata |
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75 entries. |
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76 |
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77 - 20 bytes: obsoleted changeset identifier. |
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78 |
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79 - N*20 bytes: new changesets identifiers. |
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80 |
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81 - M bytes: metadata as a sequence of nul-terminated strings. Each |
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82 string contains a key and a value, separated by a colon ':', without |
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83 additional encoding. Keys cannot contain '\0' or ':' and values |
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84 cannot contain '\0'. |
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85 |
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86 """ |
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87 import struct |
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88 import util, base85, node |
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89 import phases |
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90 from i18n import _ |
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91 |
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92 _pack = struct.pack |
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93 _unpack = struct.unpack |
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94 |
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95 _SEEK_END = 2 # os.SEEK_END was introduced in Python 2.5 |
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96 |
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97 # the obsolete feature is not mature enough to be enabled by default. |
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98 # you have to rely on third party extension extension to enable this. |
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99 _enabled = False |
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100 |
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101 # data used for parsing and writing |
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102 _fmversion = 0 |
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103 _fmfixed = '>BIB20s' |
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104 _fmnode = '20s' |
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105 _fmfsize = struct.calcsize(_fmfixed) |
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106 _fnodesize = struct.calcsize(_fmnode) |
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107 |
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108 ### obsolescence marker flag |
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109 |
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110 ## bumpedfix flag |
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111 # |
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112 # When a changeset A' succeed to a changeset A which became public, we call A' |
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113 # "bumped" because it's a successors of a public changesets |
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114 # |
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115 # o A' (bumped) |
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116 # |`: |
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117 # | o A |
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118 # |/ |
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119 # o Z |
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120 # |
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121 # The way to solve this situation is to create a new changeset Ad as children |
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122 # of A. This changeset have the same content than A'. So the diff from A to A' |
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123 # is the same than the diff from A to Ad. Ad is marked as a successors of A' |
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124 # |
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125 # o Ad |
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126 # |`: |
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127 # | x A' |
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128 # |'| |
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129 # o | A |
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130 # |/ |
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131 # o Z |
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132 # |
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133 # But by transitivity Ad is also a successors of A. To avoid having Ad marked |
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134 # as bumped too, we add the `bumpedfix` flag to the marker. <A', (Ad,)>. |
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135 # This flag mean that the successors express the changes between the public and |
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136 # bumped version and fix the situation, breaking the transitivity of |
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137 # "bumped" here. |
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138 bumpedfix = 1 |
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139 |
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140 def _readmarkers(data): |
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141 """Read and enumerate markers from raw data""" |
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142 off = 0 |
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143 diskversion = _unpack('>B', data[off:off + 1])[0] |
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144 off += 1 |
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145 if diskversion != _fmversion: |
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146 raise util.Abort(_('parsing obsolete marker: unknown version %r') |
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147 % diskversion) |
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148 |
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149 # Loop on markers |
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150 l = len(data) |
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151 while off + _fmfsize <= l: |
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152 # read fixed part |
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153 cur = data[off:off + _fmfsize] |
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154 off += _fmfsize |
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155 nbsuc, mdsize, flags, pre = _unpack(_fmfixed, cur) |
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156 # read replacement |
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157 sucs = () |
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158 if nbsuc: |
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159 s = (_fnodesize * nbsuc) |
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160 cur = data[off:off + s] |
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161 sucs = _unpack(_fmnode * nbsuc, cur) |
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162 off += s |
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163 # read metadata |
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164 # (metadata will be decoded on demand) |
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165 metadata = data[off:off + mdsize] |
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166 if len(metadata) != mdsize: |
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167 raise util.Abort(_('parsing obsolete marker: metadata is too ' |
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168 'short, %d bytes expected, got %d') |
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169 % (mdsize, len(metadata))) |
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170 off += mdsize |
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171 yield (pre, sucs, flags, metadata) |
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172 |
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173 def encodemeta(meta): |
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174 """Return encoded metadata string to string mapping. |
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175 |
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176 Assume no ':' in key and no '\0' in both key and value.""" |
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177 for key, value in meta.iteritems(): |
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178 if ':' in key or '\0' in key: |
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179 raise ValueError("':' and '\0' are forbidden in metadata key'") |
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180 if '\0' in value: |
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181 raise ValueError("':' is forbidden in metadata value'") |
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182 return '\0'.join(['%s:%s' % (k, meta[k]) for k in sorted(meta)]) |
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183 |
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184 def decodemeta(data): |
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185 """Return string to string dictionary from encoded version.""" |
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186 d = {} |
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187 for l in data.split('\0'): |
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188 if l: |
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189 key, value = l.split(':') |
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190 d[key] = value |
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191 return d |
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192 |
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193 class marker(object): |
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194 """Wrap obsolete marker raw data""" |
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195 |
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196 def __init__(self, repo, data): |
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197 # the repo argument will be used to create changectx in later version |
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198 self._repo = repo |
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199 self._data = data |
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200 self._decodedmeta = None |
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201 |
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202 def __hash__(self): |
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203 return hash(self._data) |
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204 |
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205 def __eq__(self, other): |
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206 if type(other) != type(self): |
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207 return False |
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208 return self._data == other._data |
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209 |
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210 def precnode(self): |
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211 """Precursor changeset node identifier""" |
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212 return self._data[0] |
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213 |
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214 def succnodes(self): |
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215 """List of successor changesets node identifiers""" |
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216 return self._data[1] |
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217 |
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218 def metadata(self): |
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219 """Decoded metadata dictionary""" |
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220 if self._decodedmeta is None: |
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221 self._decodedmeta = decodemeta(self._data[3]) |
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222 return self._decodedmeta |
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223 |
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224 def date(self): |
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225 """Creation date as (unixtime, offset)""" |
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226 parts = self.metadata()['date'].split(' ') |
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227 return (float(parts[0]), int(parts[1])) |
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228 |
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229 class obsstore(object): |
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230 """Store obsolete markers |
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231 |
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232 Markers can be accessed with two mappings: |
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233 - precursors[x] -> set(markers on precursors edges of x) |
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234 - successors[x] -> set(markers on successors edges of x) |
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235 """ |
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236 |
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237 def __init__(self, sopener): |
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238 # caches for various obsolescence related cache |
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239 self.caches = {} |
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240 self._all = [] |
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241 # new markers to serialize |
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242 self.precursors = {} |
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243 self.successors = {} |
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244 self.sopener = sopener |
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245 data = sopener.tryread('obsstore') |
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246 if data: |
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247 self._load(_readmarkers(data)) |
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248 |
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249 def __iter__(self): |
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250 return iter(self._all) |
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251 |
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252 def __len__(self): |
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253 return len(self._all) |
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254 |
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255 def __nonzero__(self): |
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256 return bool(self._all) |
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257 |
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258 def create(self, transaction, prec, succs=(), flag=0, metadata=None): |
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259 """obsolete: add a new obsolete marker |
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260 |
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261 * ensuring it is hashable |
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262 * check mandatory metadata |
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263 * encode metadata |
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264 |
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265 If you are a human writing code creating marker you want to use the |
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266 `createmarkers` function in this module instead. |
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267 |
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268 return True if a new marker have been added, False if the markers |
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269 already existed (no op). |
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270 """ |
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271 if metadata is None: |
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272 metadata = {} |
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273 if 'date' not in metadata: |
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274 metadata['date'] = "%d %d" % util.makedate() |
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275 if len(prec) != 20: |
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276 raise ValueError(prec) |
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277 for succ in succs: |
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278 if len(succ) != 20: |
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279 raise ValueError(succ) |
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280 marker = (str(prec), tuple(succs), int(flag), encodemeta(metadata)) |
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281 return bool(self.add(transaction, [marker])) |
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282 |
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283 def add(self, transaction, markers): |
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284 """Add new markers to the store |
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285 |
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286 Take care of filtering duplicate. |
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287 Return the number of new marker.""" |
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288 if not _enabled: |
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289 raise util.Abort('obsolete feature is not enabled on this repo') |
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290 known = set(self._all) |
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291 new = [] |
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292 for m in markers: |
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293 if m not in known: |
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294 known.add(m) |
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295 new.append(m) |
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296 if new: |
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297 f = self.sopener('obsstore', 'ab') |
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298 try: |
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299 # Whether the file's current position is at the begin or at |
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300 # the end after opening a file for appending is implementation |
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301 # defined. So we must seek to the end before calling tell(), |
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302 # or we may get a zero offset for non-zero sized files on |
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303 # some platforms (issue3543). |
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304 f.seek(0, _SEEK_END) |
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305 offset = f.tell() |
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306 transaction.add('obsstore', offset) |
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307 # offset == 0: new file - add the version header |
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308 for bytes in _encodemarkers(new, offset == 0): |
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309 f.write(bytes) |
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310 finally: |
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311 # XXX: f.close() == filecache invalidation == obsstore rebuilt. |
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312 # call 'filecacheentry.refresh()' here |
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313 f.close() |
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314 self._load(new) |
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315 # new marker *may* have changed several set. invalidate the cache. |
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316 self.caches.clear() |
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317 return len(new) |
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318 |
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320 markers = _readmarkers(data) |
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322 |
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323 def _load(self, markers): |
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324 for mark in markers: |
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325 self._all.append(mark) |
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326 pre, sucs = mark[:2] |
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327 self.successors.setdefault(pre, set()).add(mark) |
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328 for suc in sucs: |
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329 self.precursors.setdefault(suc, set()).add(mark) |
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330 if node.nullid in self.precursors: |
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331 raise util.Abort(_('bad obsolescence marker detected: ' |
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332 'invalid successors nullid')) |
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333 |
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334 def _encodemarkers(markers, addheader=False): |
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335 # Kept separate from flushmarkers(), it will be reused for |
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336 # markers exchange. |
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337 if addheader: |
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338 yield _pack('>B', _fmversion) |
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339 for marker in markers: |
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340 yield _encodeonemarker(marker) |
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341 |
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342 |
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343 def _encodeonemarker(marker): |
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344 pre, sucs, flags, metadata = marker |
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345 nbsuc = len(sucs) |
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346 format = _fmfixed + (_fmnode * nbsuc) |
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347 data = [nbsuc, len(metadata), flags, pre] |
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348 data.extend(sucs) |
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349 return _pack(format, *data) + metadata |
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350 |
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351 # arbitrary picked to fit into 8K limit from HTTP server |
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352 # you have to take in account: |
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353 # - the version header |
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354 # - the base85 encoding |
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355 _maxpayload = 5300 |
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356 |
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357 def _pushkeyescape(markers): |
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358 """encode markers into a dict suitable for pushkey exchange |
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359 |
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360 - binary data is base85 encoded |
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361 - split in chunks smaller than 5300 bytes""" |
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362 keys = {} |
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363 parts = [] |
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364 currentlen = _maxpayload * 2 # ensure we create a new part |
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365 for marker in markers: |
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366 nextdata = _encodeonemarker(marker) |
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367 if (len(nextdata) + currentlen > _maxpayload): |
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368 currentpart = [] |
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369 currentlen = 0 |
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370 parts.append(currentpart) |
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371 currentpart.append(nextdata) |
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372 currentlen += len(nextdata) |
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373 for idx, part in enumerate(reversed(parts)): |
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374 data = ''.join([_pack('>B', _fmversion)] + part) |
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375 keys['dump%i' % idx] = base85.b85encode(data) |
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376 return keys |
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377 |
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378 def listmarkers(repo): |
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379 """List markers over pushkey""" |
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380 if not repo.obsstore: |
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381 return {} |
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382 return _pushkeyescape(repo.obsstore) |
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383 |
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384 def pushmarker(repo, key, old, new): |
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385 """Push markers over pushkey""" |
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386 if not key.startswith('dump'): |
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387 repo.ui.warn(_('unknown key: %r') % key) |
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388 return 0 |
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389 if old: |
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390 repo.ui.warn(_('unexpected old value for %r') % key) |
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391 return 0 |
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392 data = base85.b85decode(new) |
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393 lock = repo.lock() |
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394 try: |
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395 tr = repo.transaction('pushkey: obsolete markers') |
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396 try: |
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397 repo.obsstore.mergemarkers(tr, data) |
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398 tr.close() |
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399 return 1 |
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400 finally: |
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401 tr.release() |
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402 finally: |
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403 lock.release() |
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404 |
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405 def allmarkers(repo): |
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406 """all obsolete markers known in a repository""" |
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407 for markerdata in repo.obsstore: |
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408 yield marker(repo, markerdata) |
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409 |
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410 def precursormarkers(ctx): |
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411 """obsolete marker marking this changeset as a successors""" |
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412 for data in ctx._repo.obsstore.precursors.get(ctx.node(), ()): |
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413 yield marker(ctx._repo, data) |
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414 |
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415 def successormarkers(ctx): |
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416 """obsolete marker making this changeset obsolete""" |
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417 for data in ctx._repo.obsstore.successors.get(ctx.node(), ()): |
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418 yield marker(ctx._repo, data) |
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419 |
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420 def allsuccessors(obsstore, nodes, ignoreflags=0): |
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421 """Yield node for every successor of <nodes>. |
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422 |
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423 Some successors may be unknown locally. |
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424 |
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425 This is a linear yield unsuited to detecting split changesets. It includes |
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426 initial nodes too.""" |
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427 remaining = set(nodes) |
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428 seen = set(remaining) |
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429 while remaining: |
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430 current = remaining.pop() |
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431 yield current |
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432 for mark in obsstore.successors.get(current, ()): |
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433 # ignore marker flagged with specified flag |
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434 if mark[2] & ignoreflags: |
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435 continue |
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436 for suc in mark[1]: |
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437 if suc not in seen: |
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438 seen.add(suc) |
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439 remaining.add(suc) |
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440 |
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441 def allprecursors(obsstore, nodes, ignoreflags=0): |
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442 """Yield node for every precursors of <nodes>. |
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443 |
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444 Some precursors may be unknown locally. |
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445 |
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446 This is a linear yield unsuited to detecting folded changesets. It includes |
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447 initial nodes too.""" |
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448 |
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449 remaining = set(nodes) |
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450 seen = set(remaining) |
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451 while remaining: |
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452 current = remaining.pop() |
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453 yield current |
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454 for mark in obsstore.precursors.get(current, ()): |
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455 # ignore marker flagged with specified flag |
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456 if mark[2] & ignoreflags: |
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457 continue |
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458 suc = mark[0] |
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459 if suc not in seen: |
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460 seen.add(suc) |
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461 remaining.add(suc) |
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462 |
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463 def foreground(repo, nodes): |
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464 """return all nodes in the "foreground" of other node |
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465 |
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466 The foreground of a revision is anything reachable using parent -> children |
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467 or precursor -> successor relation. It is very similar to "descendant" but |
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468 augmented with obsolescence information. |
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469 |
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470 Beware that possible obsolescence cycle may result if complex situation. |
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471 """ |
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472 repo = repo.unfiltered() |
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473 foreground = set(repo.set('%ln::', nodes)) |
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474 if repo.obsstore: |
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475 # We only need this complicated logic if there is obsolescence |
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476 # XXX will probably deserve an optimised revset. |
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477 nm = repo.changelog.nodemap |
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478 plen = -1 |
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479 # compute the whole set of successors or descendants |
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480 while len(foreground) != plen: |
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481 plen = len(foreground) |
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482 succs = set(c.node() for c in foreground) |
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483 mutable = [c.node() for c in foreground if c.mutable()] |
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484 succs.update(allsuccessors(repo.obsstore, mutable)) |
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485 known = (n for n in succs if n in nm) |
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486 foreground = set(repo.set('%ln::', known)) |
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487 return set(c.node() for c in foreground) |
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488 |
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489 |
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490 def successorssets(repo, initialnode, cache=None): |
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491 """Return all set of successors of initial nodes |
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492 |
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493 The successors set of a changeset A are a group of revisions that succeed |
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494 A. It succeeds A as a consistent whole, each revision being only a partial |
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495 replacement. The successors set contains non-obsolete changesets only. |
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496 |
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497 This function returns the full list of successor sets which is why it |
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498 returns a list of tuples and not just a single tuple. Each tuple is a valid |
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499 successors set. Not that (A,) may be a valid successors set for changeset A |
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500 (see below). |
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501 |
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502 In most cases, a changeset A will have a single element (e.g. the changeset |
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503 A is replaced by A') in its successors set. Though, it is also common for a |
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504 changeset A to have no elements in its successor set (e.g. the changeset |
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505 has been pruned). Therefore, the returned list of successors sets will be |
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506 [(A',)] or [], respectively. |
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507 |
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508 When a changeset A is split into A' and B', however, it will result in a |
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509 successors set containing more than a single element, i.e. [(A',B')]. |
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510 Divergent changesets will result in multiple successors sets, i.e. [(A',), |
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511 (A'')]. |
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512 |
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513 If a changeset A is not obsolete, then it will conceptually have no |
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514 successors set. To distinguish this from a pruned changeset, the successor |
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515 set will only contain itself, i.e. [(A,)]. |
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516 |
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517 Finally, successors unknown locally are considered to be pruned (obsoleted |
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518 without any successors). |
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519 |
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520 The optional `cache` parameter is a dictionary that may contain precomputed |
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521 successors sets. It is meant to reuse the computation of a previous call to |
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522 `successorssets` when multiple calls are made at the same time. The cache |
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523 dictionary is updated in place. The caller is responsible for its live |
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524 spawn. Code that makes multiple calls to `successorssets` *must* use this |
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525 cache mechanism or suffer terrible performances. |
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526 |
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527 """ |
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528 |
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529 succmarkers = repo.obsstore.successors |
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530 |
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531 # Stack of nodes we search successors sets for |
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532 toproceed = [initialnode] |
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533 # set version of above list for fast loop detection |
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534 # element added to "toproceed" must be added here |
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535 stackedset = set(toproceed) |
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536 if cache is None: |
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537 cache = {} |
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538 |
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539 # This while loop is the flattened version of a recursive search for |
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540 # successors sets |
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541 # |
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542 # def successorssets(x): |
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543 # successors = directsuccessors(x) |
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544 # ss = [[]] |
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545 # for succ in directsuccessors(x): |
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546 # # product as in itertools cartesian product |
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547 # ss = product(ss, successorssets(succ)) |
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548 # return ss |
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549 # |
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550 # But we can not use plain recursive calls here: |
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551 # - that would blow the python call stack |
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552 # - obsolescence markers may have cycles, we need to handle them. |
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553 # |
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554 # The `toproceed` list act as our call stack. Every node we search |
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555 # successors set for are stacked there. |
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556 # |
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557 # The `stackedset` is set version of this stack used to check if a node is |
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558 # already stacked. This check is used to detect cycles and prevent infinite |
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559 # loop. |
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560 # |
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561 # successors set of all nodes are stored in the `cache` dictionary. |
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562 # |
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563 # After this while loop ends we use the cache to return the successors sets |
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564 # for the node requested by the caller. |
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565 while toproceed: |
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566 # Every iteration tries to compute the successors sets of the topmost |
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567 # node of the stack: CURRENT. |
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568 # |
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569 # There are four possible outcomes: |
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570 # |
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571 # 1) We already know the successors sets of CURRENT: |
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572 # -> mission accomplished, pop it from the stack. |
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573 # 2) Node is not obsolete: |
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574 # -> the node is its own successors sets. Add it to the cache. |
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575 # 3) We do not know successors set of direct successors of CURRENT: |
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576 # -> We add those successors to the stack. |
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577 # 4) We know successors sets of all direct successors of CURRENT: |
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578 # -> We can compute CURRENT successors set and add it to the |
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579 # cache. |
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580 # |
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581 current = toproceed[-1] |
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582 if current in cache: |
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583 # case (1): We already know the successors sets |
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584 stackedset.remove(toproceed.pop()) |
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585 elif current not in succmarkers: |
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586 # case (2): The node is not obsolete. |
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587 if current in repo: |
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588 # We have a valid last successors. |
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589 cache[current] = [(current,)] |
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590 else: |
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591 # Final obsolete version is unknown locally. |
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592 # Do not count that as a valid successors |
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593 cache[current] = [] |
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594 else: |
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595 # cases (3) and (4) |
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596 # |
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597 # We proceed in two phases. Phase 1 aims to distinguish case (3) |
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598 # from case (4): |
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599 # |
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600 # For each direct successors of CURRENT, we check whether its |
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601 # successors sets are known. If they are not, we stack the |
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602 # unknown node and proceed to the next iteration of the while |
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603 # loop. (case 3) |
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604 # |
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605 # During this step, we may detect obsolescence cycles: a node |
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606 # with unknown successors sets but already in the call stack. |
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607 # In such a situation, we arbitrary set the successors sets of |
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608 # the node to nothing (node pruned) to break the cycle. |
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609 # |
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610 # If no break was encountered we proceed to phase 2. |
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611 # |
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612 # Phase 2 computes successors sets of CURRENT (case 4); see details |
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613 # in phase 2 itself. |
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614 # |
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615 # Note the two levels of iteration in each phase. |
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616 # - The first one handles obsolescence markers using CURRENT as |
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617 # precursor (successors markers of CURRENT). |
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618 # |
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619 # Having multiple entry here means divergence. |
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620 # |
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621 # - The second one handles successors defined in each marker. |
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622 # |
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623 # Having none means pruned node, multiple successors means split, |
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624 # single successors are standard replacement. |
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625 # |
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626 for mark in sorted(succmarkers[current]): |
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627 for suc in mark[1]: |
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628 if suc not in cache: |
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629 if suc in stackedset: |
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630 # cycle breaking |
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631 cache[suc] = [] |
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632 else: |
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633 # case (3) If we have not computed successors sets |
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634 # of one of those successors we add it to the |
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635 # `toproceed` stack and stop all work for this |
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636 # iteration. |
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637 toproceed.append(suc) |
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638 stackedset.add(suc) |
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639 break |
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640 else: |
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641 continue |
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642 break |
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643 else: |
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644 # case (4): we know all successors sets of all direct |
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645 # successors |
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646 # |
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647 # Successors set contributed by each marker depends on the |
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648 # successors sets of all its "successors" node. |
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649 # |
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650 # Each different marker is a divergence in the obsolescence |
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651 # history. It contributes successors sets distinct from other |
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652 # markers. |
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653 # |
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654 # Within a marker, a successor may have divergent successors |
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655 # sets. In such a case, the marker will contribute multiple |
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656 # divergent successors sets. If multiple successors have |
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657 # divergent successors sets, a Cartesian product is used. |
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658 # |
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659 # At the end we post-process successors sets to remove |
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660 # duplicated entry and successors set that are strict subset of |
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661 # another one. |
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662 succssets = [] |
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663 for mark in sorted(succmarkers[current]): |
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664 # successors sets contributed by this marker |
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665 markss = [[]] |
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666 for suc in mark[1]: |
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667 # cardinal product with previous successors |
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668 productresult = [] |
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669 for prefix in markss: |
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670 for suffix in cache[suc]: |
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671 newss = list(prefix) |
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672 for part in suffix: |
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673 # do not duplicated entry in successors set |
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674 # first entry wins. |
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675 if part not in newss: |
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676 newss.append(part) |
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677 productresult.append(newss) |
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678 markss = productresult |
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679 succssets.extend(markss) |
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680 # remove duplicated and subset |
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681 seen = [] |
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682 final = [] |
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683 candidate = sorted(((set(s), s) for s in succssets if s), |
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684 key=lambda x: len(x[1]), reverse=True) |
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685 for setversion, listversion in candidate: |
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686 for seenset in seen: |
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687 if setversion.issubset(seenset): |
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688 break |
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689 else: |
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690 final.append(listversion) |
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691 seen.append(setversion) |
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692 final.reverse() # put small successors set first |
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693 cache[current] = final |
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694 return cache[initialnode] |
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|
695 |
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696 def _knownrevs(repo, nodes): |
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697 """yield revision numbers of known nodes passed in parameters |
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698 |
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699 Unknown revisions are silently ignored.""" |
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700 torev = repo.changelog.nodemap.get |
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701 for n in nodes: |
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702 rev = torev(n) |
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|
703 if rev is not None: |
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704 yield rev |
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705 |
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706 # mapping of 'set-name' -> <function to compute this set> |
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707 cachefuncs = {} |
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708 def cachefor(name): |
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709 """Decorator to register a function as computing the cache for a set""" |
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710 def decorator(func): |
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711 assert name not in cachefuncs |
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712 cachefuncs[name] = func |
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|
713 return func |
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714 return decorator |
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|
715 |
17825
3cc06457f15e
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716 def getrevs(repo, name): |
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717 """Return the set of revision that belong to the <name> set |
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718 |
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719 Such access may compute the set and cache it for future use""" |
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|
720 repo = repo.unfiltered() |
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721 if not repo.obsstore: |
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722 return () |
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723 if name not in repo.obsstore.caches: |
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724 repo.obsstore.caches[name] = cachefuncs[name](repo) |
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725 return repo.obsstore.caches[name] |
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726 |
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|
727 # To be simple we need to invalidate obsolescence cache when: |
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728 # |
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|
729 # - new changeset is added: |
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730 # - public phase is changed |
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|
731 # - obsolescence marker are added |
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|
732 # - strip is used a repo |
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|
733 def clearobscaches(repo): |
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|
734 """Remove all obsolescence related cache from a repo |
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|
735 |
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|
736 This remove all cache in obsstore is the obsstore already exist on the |
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|
737 repo. |
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|
738 |
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|
739 (We could be smarter here given the exact event that trigger the cache |
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|
740 clearing)""" |
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|
741 # only clear cache is there is obsstore data in this repo |
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|
742 if 'obsstore' in repo._filecache: |
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|
743 repo.obsstore.caches.clear() |
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|
744 |
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|
745 @cachefor('obsolete') |
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|
746 def _computeobsoleteset(repo): |
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|
747 """the set of obsolete revisions""" |
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|
748 obs = set() |
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|
749 getrev = repo.changelog.nodemap.get |
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|
750 getphase = repo._phasecache.phase |
17776
072812e9f570
obsolete: flip `obstore.successors` and `obsolete.precursors`
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17775
diff
changeset
|
751 for node in repo.obsstore.successors: |
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|
752 rev = getrev(node) |
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diff
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|
753 if rev is not None and getphase(repo, rev): |
17469
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|
754 obs.add(rev) |
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|
755 return obs |
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|
756 |
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|
757 @cachefor('unstable') |
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|
758 def _computeunstableset(repo): |
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|
759 """the set of non obsolete revisions with obsolete parents""" |
18275
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|
760 # revset is not efficient enough here |
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|
761 # we do (obsolete()::) - obsolete() by hand |
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|
762 obs = getrevs(repo, 'obsolete') |
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|
763 if not obs: |
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|
764 return set() |
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|
765 cl = repo.changelog |
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|
766 return set(r for r in cl.descendants(obs) if r not in obs) |
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|
767 |
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|
768 @cachefor('suspended') |
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|
769 def _computesuspendedset(repo): |
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|
770 """the set of obsolete parents with non obsolete descendants""" |
18276
834ef7e70d0f
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|
771 suspended = repo.changelog.ancestors(getrevs(repo, 'unstable')) |
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|
772 return set(r for r in getrevs(repo, 'obsolete') if r in suspended) |
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|
773 |
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|
774 @cachefor('extinct') |
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|
775 def _computeextinctset(repo): |
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776 """the set of obsolete parents without non obsolete descendants""" |
18277
a58260bc101f
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18276
diff
changeset
|
777 return getrevs(repo, 'obsolete') - getrevs(repo, 'suspended') |
17474
f85816af6294
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|
778 |
17828
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|
779 |
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changeset
|
780 @cachefor('bumped') |
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|
781 def _computebumpedset(repo): |
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changeset
|
782 """the set of revs trying to obsolete public revisions""" |
20207
cd62532c62a1
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20206
diff
changeset
|
783 bumped = set() |
21024
7731a2281cf0
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Mads Kiilerich <madski@unity3d.com>
parents:
20599
diff
changeset
|
784 # util function (avoid attribute lookup in the loop) |
20207
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785 phase = repo._phasecache.phase # would be faster to grab the full list |
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786 public = phases.public |
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787 cl = repo.changelog |
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788 torev = cl.nodemap.get |
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789 obs = getrevs(repo, 'obsolete') |
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790 for rev in repo: |
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791 # We only evaluate mutable, non-obsolete revision |
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792 if (public < phase(repo, rev)) and (rev not in obs): |
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793 node = cl.node(rev) |
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794 # (future) A cache of precursors may worth if split is very common |
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795 for pnode in allprecursors(repo.obsstore, [node], |
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796 ignoreflags=bumpedfix): |
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797 prev = torev(pnode) # unfiltered! but so is phasecache |
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798 if (prev is not None) and (phase(repo, prev) <= public): |
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799 # we have a public precursors |
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800 bumped.add(rev) |
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801 break # Next draft! |
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802 return bumped |
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803 |
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804 @cachefor('divergent') |
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805 def _computedivergentset(repo): |
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806 """the set of rev that compete to be the final successors of some revision. |
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807 """ |
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808 divergent = set() |
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809 obsstore = repo.obsstore |
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810 newermap = {} |
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811 for ctx in repo.set('(not public()) - obsolete()'): |
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812 mark = obsstore.precursors.get(ctx.node(), ()) |
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813 toprocess = set(mark) |
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814 while toprocess: |
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815 prec = toprocess.pop()[0] |
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816 if prec not in newermap: |
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817 successorssets(repo, prec, newermap) |
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818 newer = [n for n in newermap[prec] if n] |
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819 if len(newer) > 1: |
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820 divergent.add(ctx.rev()) |
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821 break |
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822 toprocess.update(obsstore.precursors.get(prec, ())) |
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823 return divergent |
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824 |
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825 |
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826 def createmarkers(repo, relations, flag=0, metadata=None): |
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827 """Add obsolete markers between changesets in a repo |
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828 |
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829 <relations> must be an iterable of (<old>, (<new>, ...)[,{metadata}]) |
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830 tuple. `old` and `news` are changectx. metadata is an optional dictionary |
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831 containing metadata for this marker only. It is merged with the global |
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832 metadata specified through the `metadata` argument of this function, |
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833 |
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834 Trying to obsolete a public changeset will raise an exception. |
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835 |
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836 Current user and date are used except if specified otherwise in the |
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837 metadata attribute. |
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838 |
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839 This function operates within a transaction of its own, but does |
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840 not take any lock on the repo. |
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841 """ |
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842 # prepare metadata |
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843 if metadata is None: |
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844 metadata = {} |
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845 if 'date' not in metadata: |
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846 metadata['date'] = '%i %i' % util.makedate() |
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847 if 'user' not in metadata: |
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848 metadata['user'] = repo.ui.username() |
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849 tr = repo.transaction('add-obsolescence-marker') |
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850 try: |
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851 for rel in relations: |
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852 prec = rel[0] |
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853 sucs = rel[1] |
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854 localmetadata = metadata.copy() |
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855 if 2 < len(rel): |
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856 localmetadata.update(rel[2]) |
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857 |
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858 if not prec.mutable(): |
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859 raise util.Abort("cannot obsolete immutable changeset: %s" |
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860 % prec) |
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861 nprec = prec.node() |
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862 nsucs = tuple(s.node() for s in sucs) |
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863 if nprec in nsucs: |
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864 raise util.Abort("changeset %s cannot obsolete itself" % prec) |
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865 repo.obsstore.create(tr, nprec, nsucs, flag, localmetadata) |
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866 repo.filteredrevcache.clear() |
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867 tr.close() |
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868 finally: |
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869 tr.release() |