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1 | 1 | # obsolete.py - obsolete markers handling |
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2 | 2 | # |
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3 | 3 | # Copyright 2012 Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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4 | 4 | # Logilab SA <contact@logilab.fr> |
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5 | 5 | # |
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6 | 6 | # This software may be used and distributed according to the terms of the |
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7 | 7 | # GNU General Public License version 2 or any later version. |
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8 | 8 | |
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9 | 9 | """Obsolete marker handling |
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10 | 10 | |
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11 | 11 | An obsolete marker maps an old changeset to a list of new |
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12 | 12 | changesets. If the list of new changesets is empty, the old changeset |
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13 | 13 | is said to be "killed". Otherwise, the old changeset is being |
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14 | 14 | "replaced" by the new changesets. |
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15 | 15 | |
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16 | 16 | Obsolete markers can be used to record and distribute changeset graph |
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17 | 17 | transformations performed by history rewrite operations, and help |
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18 | 18 | building new tools to reconcile conflicting rewrite actions. To |
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19 | 19 | facilitate conflict resolution, markers include various annotations |
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20 | 20 | besides old and news changeset identifiers, such as creation date or |
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21 | 21 | author name. |
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22 | 22 | |
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23 | 23 | The old obsoleted changeset is called a "precursor" and possible |
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24 | 24 | replacements are called "successors". Markers that used changeset X as |
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25 | 25 | a precursor are called "successor markers of X" because they hold |
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26 | 26 | information about the successors of X. Markers that use changeset Y as |
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27 | 27 | a successors are call "precursor markers of Y" because they hold |
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28 | 28 | information about the precursors of Y. |
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29 | 29 | |
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30 | 30 | Examples: |
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31 | 31 | |
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32 | 32 | - When changeset A is replaced by changeset A', one marker is stored: |
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33 | 33 | |
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34 | 34 | (A, (A',)) |
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35 | 35 | |
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36 | 36 | - When changesets A and B are folded into a new changeset C, two markers are |
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37 | 37 | stored: |
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38 | 38 | |
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39 | 39 | (A, (C,)) and (B, (C,)) |
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40 | 40 | |
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41 | 41 | - When changeset A is simply "pruned" from the graph, a marker is created: |
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42 | 42 | |
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43 | 43 | (A, ()) |
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44 | 44 | |
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45 | 45 | - When changeset A is split into B and C, a single marker is used: |
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46 | 46 | |
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47 | 47 | (A, (B, C)) |
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48 | 48 | |
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49 | 49 | We use a single marker to distinguish the "split" case from the "divergence" |
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50 | 50 | case. If two independent operations rewrite the same changeset A in to A' and |
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51 | 51 | A'', we have an error case: divergent rewriting. We can detect it because |
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52 | 52 | two markers will be created independently: |
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53 | 53 | |
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54 | 54 | (A, (B,)) and (A, (C,)) |
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55 | 55 | |
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56 | 56 | Format |
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57 | 57 | ------ |
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58 | 58 | |
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59 | 59 | Markers are stored in an append-only file stored in |
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60 | 60 | '.hg/store/obsstore'. |
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61 | 61 | |
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62 | 62 | The file starts with a version header: |
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63 | 63 | |
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64 | 64 | - 1 unsigned byte: version number, starting at zero. |
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65 | 65 | |
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66 | 66 | The header is followed by the markers. Marker format depend of the version. See |
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67 | 67 | comment associated with each format for details. |
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68 | 68 | |
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69 | 69 | """ |
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70 | 70 | from __future__ import absolute_import |
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71 | 71 | |
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72 | 72 | import errno |
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73 | 73 | import struct |
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74 | 74 | |
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75 | 75 | from .i18n import _ |
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76 | 76 | from . import ( |
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77 | 77 | error, |
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78 | 78 | node, |
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79 | 79 | obsutil, |
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80 | 80 | phases, |
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81 | 81 | policy, |
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82 | 82 | util, |
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83 | 83 | ) |
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84 | 84 | |
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85 | 85 | parsers = policy.importmod(r'parsers') |
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86 | 86 | |
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87 | 87 | _pack = struct.pack |
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88 | 88 | _unpack = struct.unpack |
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89 | 89 | _calcsize = struct.calcsize |
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90 | 90 | propertycache = util.propertycache |
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91 | 91 | |
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92 | 92 | # the obsolete feature is not mature enough to be enabled by default. |
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93 | 93 | # you have to rely on third party extension extension to enable this. |
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94 | 94 | _enabled = False |
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95 | 95 | |
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96 | 96 | # Options for obsolescence |
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97 | 97 | createmarkersopt = 'createmarkers' |
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98 | 98 | allowunstableopt = 'allowunstable' |
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99 | 99 | exchangeopt = 'exchange' |
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100 | 100 | |
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101 | 101 | def isenabled(repo, option): |
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102 | 102 | """Returns True if the given repository has the given obsolete option |
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103 | 103 | enabled. |
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104 | 104 | """ |
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105 | 105 | result = set(repo.ui.configlist('experimental', 'evolution')) |
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106 | 106 | if 'all' in result: |
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107 | 107 | return True |
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108 | 108 | |
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109 | 109 | # For migration purposes, temporarily return true if the config hasn't been |
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110 | 110 | # set but _enabled is true. |
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111 | 111 | if len(result) == 0 and _enabled: |
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112 | 112 | return True |
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113 | 113 | |
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114 | 114 | # createmarkers must be enabled if other options are enabled |
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115 | 115 | if ((allowunstableopt in result or exchangeopt in result) and |
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116 | 116 | not createmarkersopt in result): |
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117 | 117 | raise error.Abort(_("'createmarkers' obsolete option must be enabled " |
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118 | 118 | "if other obsolete options are enabled")) |
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119 | 119 | |
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120 | 120 | return option in result |
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121 | 121 | |
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122 | 122 | ### obsolescence marker flag |
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123 | 123 | |
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124 | 124 | ## bumpedfix flag |
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125 | 125 | # |
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126 | 126 | # When a changeset A' succeed to a changeset A which became public, we call A' |
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127 | 127 | # "bumped" because it's a successors of a public changesets |
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128 | 128 | # |
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129 | 129 | # o A' (bumped) |
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130 | 130 | # |`: |
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131 | 131 | # | o A |
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132 | 132 | # |/ |
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133 | 133 | # o Z |
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134 | 134 | # |
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135 | 135 | # The way to solve this situation is to create a new changeset Ad as children |
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136 | 136 | # of A. This changeset have the same content than A'. So the diff from A to A' |
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137 | 137 | # is the same than the diff from A to Ad. Ad is marked as a successors of A' |
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138 | 138 | # |
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139 | 139 | # o Ad |
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140 | 140 | # |`: |
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141 | 141 | # | x A' |
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142 | 142 | # |'| |
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143 | 143 | # o | A |
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144 | 144 | # |/ |
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145 | 145 | # o Z |
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146 | 146 | # |
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147 | 147 | # But by transitivity Ad is also a successors of A. To avoid having Ad marked |
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148 | 148 | # as bumped too, we add the `bumpedfix` flag to the marker. <A', (Ad,)>. |
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149 | 149 | # This flag mean that the successors express the changes between the public and |
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150 | 150 | # bumped version and fix the situation, breaking the transitivity of |
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151 | 151 | # "bumped" here. |
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152 | 152 | bumpedfix = 1 |
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153 | 153 | usingsha256 = 2 |
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154 | 154 | |
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155 | 155 | ## Parsing and writing of version "0" |
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156 | 156 | # |
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157 | 157 | # The header is followed by the markers. Each marker is made of: |
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158 | 158 | # |
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159 | 159 | # - 1 uint8 : number of new changesets "N", can be zero. |
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160 | 160 | # |
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161 | 161 | # - 1 uint32: metadata size "M" in bytes. |
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162 | 162 | # |
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163 | 163 | # - 1 byte: a bit field. It is reserved for flags used in common |
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164 | 164 | # obsolete marker operations, to avoid repeated decoding of metadata |
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165 | 165 | # entries. |
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166 | 166 | # |
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167 | 167 | # - 20 bytes: obsoleted changeset identifier. |
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168 | 168 | # |
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169 | 169 | # - N*20 bytes: new changesets identifiers. |
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170 | 170 | # |
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171 | 171 | # - M bytes: metadata as a sequence of nul-terminated strings. Each |
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172 | 172 | # string contains a key and a value, separated by a colon ':', without |
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173 | 173 | # additional encoding. Keys cannot contain '\0' or ':' and values |
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174 | 174 | # cannot contain '\0'. |
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175 | 175 | _fm0version = 0 |
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176 | 176 | _fm0fixed = '>BIB20s' |
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177 | 177 | _fm0node = '20s' |
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178 | 178 | _fm0fsize = _calcsize(_fm0fixed) |
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179 | 179 | _fm0fnodesize = _calcsize(_fm0node) |
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180 | 180 | |
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181 | 181 | def _fm0readmarkers(data, off): |
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182 | 182 | # Loop on markers |
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183 | 183 | l = len(data) |
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184 | 184 | while off + _fm0fsize <= l: |
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185 | 185 | # read fixed part |
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186 | 186 | cur = data[off:off + _fm0fsize] |
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187 | 187 | off += _fm0fsize |
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188 | 188 | numsuc, mdsize, flags, pre = _unpack(_fm0fixed, cur) |
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189 | 189 | # read replacement |
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190 | 190 | sucs = () |
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191 | 191 | if numsuc: |
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192 | 192 | s = (_fm0fnodesize * numsuc) |
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193 | 193 | cur = data[off:off + s] |
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194 | 194 | sucs = _unpack(_fm0node * numsuc, cur) |
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195 | 195 | off += s |
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196 | 196 | # read metadata |
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197 | 197 | # (metadata will be decoded on demand) |
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198 | 198 | metadata = data[off:off + mdsize] |
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199 | 199 | if len(metadata) != mdsize: |
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200 | 200 | raise error.Abort(_('parsing obsolete marker: metadata is too ' |
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201 | 201 | 'short, %d bytes expected, got %d') |
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202 | 202 | % (mdsize, len(metadata))) |
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203 | 203 | off += mdsize |
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204 | 204 | metadata = _fm0decodemeta(metadata) |
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205 | 205 | try: |
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206 | 206 | when, offset = metadata.pop('date', '0 0').split(' ') |
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207 | 207 | date = float(when), int(offset) |
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208 | 208 | except ValueError: |
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209 | 209 | date = (0., 0) |
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210 | 210 | parents = None |
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211 | 211 | if 'p2' in metadata: |
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212 | 212 | parents = (metadata.pop('p1', None), metadata.pop('p2', None)) |
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213 | 213 | elif 'p1' in metadata: |
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214 | 214 | parents = (metadata.pop('p1', None),) |
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215 | 215 | elif 'p0' in metadata: |
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216 | 216 | parents = () |
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217 | 217 | if parents is not None: |
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218 | 218 | try: |
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219 | 219 | parents = tuple(node.bin(p) for p in parents) |
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220 | 220 | # if parent content is not a nodeid, drop the data |
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221 | 221 | for p in parents: |
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222 | 222 | if len(p) != 20: |
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223 | 223 | parents = None |
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224 | 224 | break |
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225 | 225 | except TypeError: |
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226 | 226 | # if content cannot be translated to nodeid drop the data. |
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227 | 227 | parents = None |
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228 | 228 | |
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229 | 229 | metadata = tuple(sorted(metadata.iteritems())) |
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230 | 230 | |
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231 | 231 | yield (pre, sucs, flags, metadata, date, parents) |
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232 | 232 | |
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233 | 233 | def _fm0encodeonemarker(marker): |
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234 | 234 | pre, sucs, flags, metadata, date, parents = marker |
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235 | 235 | if flags & usingsha256: |
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236 | 236 | raise error.Abort(_('cannot handle sha256 with old obsstore format')) |
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237 | 237 | metadata = dict(metadata) |
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238 | 238 | time, tz = date |
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239 | 239 | metadata['date'] = '%r %i' % (time, tz) |
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240 | 240 | if parents is not None: |
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241 | 241 | if not parents: |
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242 | 242 | # mark that we explicitly recorded no parents |
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243 | 243 | metadata['p0'] = '' |
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244 | 244 | for i, p in enumerate(parents, 1): |
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245 | 245 | metadata['p%i' % i] = node.hex(p) |
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246 | 246 | metadata = _fm0encodemeta(metadata) |
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247 | 247 | numsuc = len(sucs) |
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248 | 248 | format = _fm0fixed + (_fm0node * numsuc) |
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249 | 249 | data = [numsuc, len(metadata), flags, pre] |
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250 | 250 | data.extend(sucs) |
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251 | 251 | return _pack(format, *data) + metadata |
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252 | 252 | |
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253 | 253 | def _fm0encodemeta(meta): |
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254 | 254 | """Return encoded metadata string to string mapping. |
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255 | 255 | |
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256 | 256 | Assume no ':' in key and no '\0' in both key and value.""" |
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257 | 257 | for key, value in meta.iteritems(): |
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258 | 258 | if ':' in key or '\0' in key: |
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259 | 259 | raise ValueError("':' and '\0' are forbidden in metadata key'") |
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260 | 260 | if '\0' in value: |
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261 | 261 | raise ValueError("':' is forbidden in metadata value'") |
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262 | 262 | return '\0'.join(['%s:%s' % (k, meta[k]) for k in sorted(meta)]) |
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263 | 263 | |
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264 | 264 | def _fm0decodemeta(data): |
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265 | 265 | """Return string to string dictionary from encoded version.""" |
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266 | 266 | d = {} |
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267 | 267 | for l in data.split('\0'): |
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268 | 268 | if l: |
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269 | 269 | key, value = l.split(':') |
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270 | 270 | d[key] = value |
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271 | 271 | return d |
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272 | 272 | |
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273 | 273 | ## Parsing and writing of version "1" |
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274 | 274 | # |
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275 | 275 | # The header is followed by the markers. Each marker is made of: |
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276 | 276 | # |
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277 | 277 | # - uint32: total size of the marker (including this field) |
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278 | 278 | # |
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279 | 279 | # - float64: date in seconds since epoch |
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280 | 280 | # |
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281 | 281 | # - int16: timezone offset in minutes |
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282 | 282 | # |
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283 | 283 | # - uint16: a bit field. It is reserved for flags used in common |
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284 | 284 | # obsolete marker operations, to avoid repeated decoding of metadata |
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285 | 285 | # entries. |
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286 | 286 | # |
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287 | 287 | # - uint8: number of successors "N", can be zero. |
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288 | 288 | # |
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289 | 289 | # - uint8: number of parents "P", can be zero. |
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290 | 290 | # |
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291 | 291 | # 0: parents data stored but no parent, |
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292 | 292 | # 1: one parent stored, |
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293 | 293 | # 2: two parents stored, |
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294 | 294 | # 3: no parent data stored |
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295 | 295 | # |
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296 | 296 | # - uint8: number of metadata entries M |
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297 | 297 | # |
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298 | 298 | # - 20 or 32 bytes: precursor changeset identifier. |
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299 | 299 | # |
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300 | 300 | # - N*(20 or 32) bytes: successors changesets identifiers. |
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301 | 301 | # |
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302 | 302 | # - P*(20 or 32) bytes: parents of the precursors changesets. |
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303 | 303 | # |
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304 | 304 | # - M*(uint8, uint8): size of all metadata entries (key and value) |
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305 | 305 | # |
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306 | 306 | # - remaining bytes: the metadata, each (key, value) pair after the other. |
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307 | 307 | _fm1version = 1 |
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308 | 308 | _fm1fixed = '>IdhHBBB20s' |
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309 | 309 | _fm1nodesha1 = '20s' |
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310 | 310 | _fm1nodesha256 = '32s' |
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311 | 311 | _fm1nodesha1size = _calcsize(_fm1nodesha1) |
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312 | 312 | _fm1nodesha256size = _calcsize(_fm1nodesha256) |
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313 | 313 | _fm1fsize = _calcsize(_fm1fixed) |
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314 | 314 | _fm1parentnone = 3 |
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315 | 315 | _fm1parentshift = 14 |
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316 | 316 | _fm1parentmask = (_fm1parentnone << _fm1parentshift) |
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317 | 317 | _fm1metapair = 'BB' |
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318 | 318 | _fm1metapairsize = _calcsize('BB') |
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319 | 319 | |
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320 | 320 | def _fm1purereadmarkers(data, off): |
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321 | 321 | # make some global constants local for performance |
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322 | 322 | noneflag = _fm1parentnone |
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323 | 323 | sha2flag = usingsha256 |
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324 | 324 | sha1size = _fm1nodesha1size |
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325 | 325 | sha2size = _fm1nodesha256size |
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326 | 326 | sha1fmt = _fm1nodesha1 |
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327 | 327 | sha2fmt = _fm1nodesha256 |
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328 | 328 | metasize = _fm1metapairsize |
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329 | 329 | metafmt = _fm1metapair |
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330 | 330 | fsize = _fm1fsize |
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331 | 331 | unpack = _unpack |
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332 | 332 | |
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333 | 333 | # Loop on markers |
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334 | 334 | stop = len(data) - _fm1fsize |
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335 | 335 | ufixed = struct.Struct(_fm1fixed).unpack |
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336 | 336 | |
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337 | 337 | while off <= stop: |
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338 | 338 | # read fixed part |
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339 | 339 | o1 = off + fsize |
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340 | 340 | t, secs, tz, flags, numsuc, numpar, nummeta, prec = ufixed(data[off:o1]) |
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341 | 341 | |
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342 | 342 | if flags & sha2flag: |
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343 | 343 | # FIXME: prec was read as a SHA1, needs to be amended |
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344 | 344 | |
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345 | 345 | # read 0 or more successors |
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346 | 346 | if numsuc == 1: |
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347 | 347 | o2 = o1 + sha2size |
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348 | 348 | sucs = (data[o1:o2],) |
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349 | 349 | else: |
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350 | 350 | o2 = o1 + sha2size * numsuc |
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351 | 351 | sucs = unpack(sha2fmt * numsuc, data[o1:o2]) |
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352 | 352 | |
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353 | 353 | # read parents |
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354 | 354 | if numpar == noneflag: |
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355 | 355 | o3 = o2 |
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356 | 356 | parents = None |
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357 | 357 | elif numpar == 1: |
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358 | 358 | o3 = o2 + sha2size |
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359 | 359 | parents = (data[o2:o3],) |
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360 | 360 | else: |
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361 | 361 | o3 = o2 + sha2size * numpar |
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362 | 362 | parents = unpack(sha2fmt * numpar, data[o2:o3]) |
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363 | 363 | else: |
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364 | 364 | # read 0 or more successors |
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365 | 365 | if numsuc == 1: |
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366 | 366 | o2 = o1 + sha1size |
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367 | 367 | sucs = (data[o1:o2],) |
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368 | 368 | else: |
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369 | 369 | o2 = o1 + sha1size * numsuc |
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370 | 370 | sucs = unpack(sha1fmt * numsuc, data[o1:o2]) |
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371 | 371 | |
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372 | 372 | # read parents |
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373 | 373 | if numpar == noneflag: |
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374 | 374 | o3 = o2 |
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375 | 375 | parents = None |
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376 | 376 | elif numpar == 1: |
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377 | 377 | o3 = o2 + sha1size |
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378 | 378 | parents = (data[o2:o3],) |
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379 | 379 | else: |
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380 | 380 | o3 = o2 + sha1size * numpar |
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381 | 381 | parents = unpack(sha1fmt * numpar, data[o2:o3]) |
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382 | 382 | |
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383 | 383 | # read metadata |
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384 | 384 | off = o3 + metasize * nummeta |
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385 | 385 | metapairsize = unpack('>' + (metafmt * nummeta), data[o3:off]) |
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386 | 386 | metadata = [] |
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387 | 387 | for idx in xrange(0, len(metapairsize), 2): |
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388 | 388 | o1 = off + metapairsize[idx] |
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389 | 389 | o2 = o1 + metapairsize[idx + 1] |
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390 | 390 | metadata.append((data[off:o1], data[o1:o2])) |
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391 | 391 | off = o2 |
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392 | 392 | |
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393 | 393 | yield (prec, sucs, flags, tuple(metadata), (secs, tz * 60), parents) |
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394 | 394 | |
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395 | 395 | def _fm1encodeonemarker(marker): |
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396 | 396 | pre, sucs, flags, metadata, date, parents = marker |
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397 | 397 | # determine node size |
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398 | 398 | _fm1node = _fm1nodesha1 |
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399 | 399 | if flags & usingsha256: |
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400 | 400 | _fm1node = _fm1nodesha256 |
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401 | 401 | numsuc = len(sucs) |
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402 | 402 | numextranodes = numsuc |
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403 | 403 | if parents is None: |
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404 | 404 | numpar = _fm1parentnone |
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405 | 405 | else: |
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406 | 406 | numpar = len(parents) |
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407 | 407 | numextranodes += numpar |
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408 | 408 | formatnodes = _fm1node * numextranodes |
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409 | 409 | formatmeta = _fm1metapair * len(metadata) |
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410 | 410 | format = _fm1fixed + formatnodes + formatmeta |
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411 | 411 | # tz is stored in minutes so we divide by 60 |
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412 | 412 | tz = date[1]//60 |
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413 | 413 | data = [None, date[0], tz, flags, numsuc, numpar, len(metadata), pre] |
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414 | 414 | data.extend(sucs) |
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415 | 415 | if parents is not None: |
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416 | 416 | data.extend(parents) |
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417 | 417 | totalsize = _calcsize(format) |
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418 | 418 | for key, value in metadata: |
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419 | 419 | lk = len(key) |
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420 | 420 | lv = len(value) |
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421 | 421 | data.append(lk) |
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422 | 422 | data.append(lv) |
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423 | 423 | totalsize += lk + lv |
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424 | 424 | data[0] = totalsize |
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425 | 425 | data = [_pack(format, *data)] |
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426 | 426 | for key, value in metadata: |
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427 | 427 | data.append(key) |
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428 | 428 | data.append(value) |
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429 | 429 | return ''.join(data) |
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430 | 430 | |
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431 | 431 | def _fm1readmarkers(data, off): |
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432 | 432 | native = getattr(parsers, 'fm1readmarkers', None) |
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433 | 433 | if not native: |
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434 | 434 | return _fm1purereadmarkers(data, off) |
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435 | 435 | stop = len(data) - _fm1fsize |
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436 | 436 | return native(data, off, stop) |
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437 | 437 | |
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438 | 438 | # mapping to read/write various marker formats |
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439 | 439 | # <version> -> (decoder, encoder) |
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440 | 440 | formats = {_fm0version: (_fm0readmarkers, _fm0encodeonemarker), |
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441 | 441 | _fm1version: (_fm1readmarkers, _fm1encodeonemarker)} |
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442 | 442 | |
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443 | 443 | def _readmarkerversion(data): |
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444 | 444 | return _unpack('>B', data[0:1])[0] |
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445 | 445 | |
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446 | 446 | @util.nogc |
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447 | 447 | def _readmarkers(data): |
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448 | 448 | """Read and enumerate markers from raw data""" |
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449 | 449 | diskversion = _readmarkerversion(data) |
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450 | 450 | off = 1 |
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451 | 451 | if diskversion not in formats: |
|
452 | 452 | msg = _('parsing obsolete marker: unknown version %r') % diskversion |
|
453 | 453 | raise error.UnknownVersion(msg, version=diskversion) |
|
454 | 454 | return diskversion, formats[diskversion][0](data, off) |
|
455 | 455 | |
|
456 | 456 | def encodeheader(version=_fm0version): |
|
457 | 457 | return _pack('>B', version) |
|
458 | 458 | |
|
459 | 459 | def encodemarkers(markers, addheader=False, version=_fm0version): |
|
460 | 460 | # Kept separate from flushmarkers(), it will be reused for |
|
461 | 461 | # markers exchange. |
|
462 | 462 | encodeone = formats[version][1] |
|
463 | 463 | if addheader: |
|
464 | 464 | yield encodeheader(version) |
|
465 | 465 | for marker in markers: |
|
466 | 466 | yield encodeone(marker) |
|
467 | 467 | |
|
468 | 468 | @util.nogc |
|
469 | 469 | def _addsuccessors(successors, markers): |
|
470 | 470 | for mark in markers: |
|
471 | 471 | successors.setdefault(mark[0], set()).add(mark) |
|
472 | 472 | |
|
473 | 473 | @util.nogc |
|
474 | 474 | def _addprecursors(precursors, markers): |
|
475 | 475 | for mark in markers: |
|
476 | 476 | for suc in mark[1]: |
|
477 | 477 | precursors.setdefault(suc, set()).add(mark) |
|
478 | 478 | |
|
479 | 479 | @util.nogc |
|
480 | 480 | def _addchildren(children, markers): |
|
481 | 481 | for mark in markers: |
|
482 | 482 | parents = mark[5] |
|
483 | 483 | if parents is not None: |
|
484 | 484 | for p in parents: |
|
485 | 485 | children.setdefault(p, set()).add(mark) |
|
486 | 486 | |
|
487 | 487 | def _checkinvalidmarkers(markers): |
|
488 | 488 | """search for marker with invalid data and raise error if needed |
|
489 | 489 | |
|
490 | 490 | Exist as a separated function to allow the evolve extension for a more |
|
491 | 491 | subtle handling. |
|
492 | 492 | """ |
|
493 | 493 | for mark in markers: |
|
494 | 494 | if node.nullid in mark[1]: |
|
495 | 495 | raise error.Abort(_('bad obsolescence marker detected: ' |
|
496 | 496 | 'invalid successors nullid')) |
|
497 | 497 | |
|
498 | 498 | class obsstore(object): |
|
499 | 499 | """Store obsolete markers |
|
500 | 500 | |
|
501 | 501 | Markers can be accessed with two mappings: |
|
502 | 502 | - precursors[x] -> set(markers on precursors edges of x) |
|
503 | 503 | - successors[x] -> set(markers on successors edges of x) |
|
504 | 504 | - children[x] -> set(markers on precursors edges of children(x) |
|
505 | 505 | """ |
|
506 | 506 | |
|
507 | 507 | fields = ('prec', 'succs', 'flag', 'meta', 'date', 'parents') |
|
508 | 508 | # prec: nodeid, precursor changesets |
|
509 | 509 | # succs: tuple of nodeid, successor changesets (0-N length) |
|
510 | 510 | # flag: integer, flag field carrying modifier for the markers (see doc) |
|
511 | 511 | # meta: binary blob, encoded metadata dictionary |
|
512 | 512 | # date: (float, int) tuple, date of marker creation |
|
513 | 513 | # parents: (tuple of nodeid) or None, parents of precursors |
|
514 | 514 | # None is used when no data has been recorded |
|
515 | 515 | |
|
516 | 516 | def __init__(self, svfs, defaultformat=_fm1version, readonly=False): |
|
517 | 517 | # caches for various obsolescence related cache |
|
518 | 518 | self.caches = {} |
|
519 | 519 | self.svfs = svfs |
|
520 | 520 | self._defaultformat = defaultformat |
|
521 | 521 | self._readonly = readonly |
|
522 | 522 | |
|
523 | 523 | def __iter__(self): |
|
524 | 524 | return iter(self._all) |
|
525 | 525 | |
|
526 | 526 | def __len__(self): |
|
527 | 527 | return len(self._all) |
|
528 | 528 | |
|
529 | 529 | def __nonzero__(self): |
|
530 | 530 | if not self._cached('_all'): |
|
531 | 531 | try: |
|
532 | 532 | return self.svfs.stat('obsstore').st_size > 1 |
|
533 | 533 | except OSError as inst: |
|
534 | 534 | if inst.errno != errno.ENOENT: |
|
535 | 535 | raise |
|
536 | 536 | # just build an empty _all list if no obsstore exists, which |
|
537 | 537 | # avoids further stat() syscalls |
|
538 | 538 | pass |
|
539 | 539 | return bool(self._all) |
|
540 | 540 | |
|
541 | 541 | __bool__ = __nonzero__ |
|
542 | 542 | |
|
543 | 543 | @property |
|
544 | 544 | def readonly(self): |
|
545 | 545 | """True if marker creation is disabled |
|
546 | 546 | |
|
547 | 547 | Remove me in the future when obsolete marker is always on.""" |
|
548 | 548 | return self._readonly |
|
549 | 549 | |
|
550 | 550 | def create(self, transaction, prec, succs=(), flag=0, parents=None, |
|
551 | 551 | date=None, metadata=None, ui=None): |
|
552 | 552 | """obsolete: add a new obsolete marker |
|
553 | 553 | |
|
554 | 554 | * ensuring it is hashable |
|
555 | 555 | * check mandatory metadata |
|
556 | 556 | * encode metadata |
|
557 | 557 | |
|
558 | 558 | If you are a human writing code creating marker you want to use the |
|
559 | 559 | `createmarkers` function in this module instead. |
|
560 | 560 | |
|
561 | 561 | return True if a new marker have been added, False if the markers |
|
562 | 562 | already existed (no op). |
|
563 | 563 | """ |
|
564 | 564 | if metadata is None: |
|
565 | 565 | metadata = {} |
|
566 | 566 | if date is None: |
|
567 | 567 | if 'date' in metadata: |
|
568 | 568 | # as a courtesy for out-of-tree extensions |
|
569 | 569 | date = util.parsedate(metadata.pop('date')) |
|
570 | 570 | elif ui is not None: |
|
571 | 571 | date = ui.configdate('devel', 'default-date') |
|
572 | 572 | if date is None: |
|
573 | 573 | date = util.makedate() |
|
574 | 574 | else: |
|
575 | 575 | date = util.makedate() |
|
576 | 576 | if len(prec) != 20: |
|
577 | 577 | raise ValueError(prec) |
|
578 | 578 | for succ in succs: |
|
579 | 579 | if len(succ) != 20: |
|
580 | 580 | raise ValueError(succ) |
|
581 | 581 | if prec in succs: |
|
582 | 582 | raise ValueError(_('in-marker cycle with %s') % node.hex(prec)) |
|
583 | 583 | |
|
584 | 584 | metadata = tuple(sorted(metadata.iteritems())) |
|
585 | 585 | |
|
586 | 586 | marker = (str(prec), tuple(succs), int(flag), metadata, date, parents) |
|
587 | 587 | return bool(self.add(transaction, [marker])) |
|
588 | 588 | |
|
589 | 589 | def add(self, transaction, markers): |
|
590 | 590 | """Add new markers to the store |
|
591 | 591 | |
|
592 | 592 | Take care of filtering duplicate. |
|
593 | 593 | Return the number of new marker.""" |
|
594 | 594 | if self._readonly: |
|
595 | 595 | raise error.Abort(_('creating obsolete markers is not enabled on ' |
|
596 | 596 | 'this repo')) |
|
597 | 597 | known = set() |
|
598 | 598 | getsuccessors = self.successors.get |
|
599 | 599 | new = [] |
|
600 | 600 | for m in markers: |
|
601 | 601 | if m not in getsuccessors(m[0], ()) and m not in known: |
|
602 | 602 | known.add(m) |
|
603 | 603 | new.append(m) |
|
604 | 604 | if new: |
|
605 | 605 | f = self.svfs('obsstore', 'ab') |
|
606 | 606 | try: |
|
607 | 607 | offset = f.tell() |
|
608 | 608 | transaction.add('obsstore', offset) |
|
609 | 609 | # offset == 0: new file - add the version header |
|
610 |
|
|
|
611 |
|
|
|
610 | data = b''.join(encodemarkers(new, offset == 0, self._version)) | |
|
611 | f.write(data) | |
|
612 | 612 | finally: |
|
613 | 613 | # XXX: f.close() == filecache invalidation == obsstore rebuilt. |
|
614 | 614 | # call 'filecacheentry.refresh()' here |
|
615 | 615 | f.close() |
|
616 | 616 | addedmarkers = transaction.changes.get('obsmarkers') |
|
617 | 617 | if addedmarkers is not None: |
|
618 | 618 | addedmarkers.update(new) |
|
619 | self._addmarkers(new) | |
|
619 | self._addmarkers(new, data) | |
|
620 | 620 | # new marker *may* have changed several set. invalidate the cache. |
|
621 | 621 | self.caches.clear() |
|
622 | 622 | # records the number of new markers for the transaction hooks |
|
623 | 623 | previous = int(transaction.hookargs.get('new_obsmarkers', '0')) |
|
624 | 624 | transaction.hookargs['new_obsmarkers'] = str(previous + len(new)) |
|
625 | 625 | return len(new) |
|
626 | 626 | |
|
627 | 627 | def mergemarkers(self, transaction, data): |
|
628 | 628 | """merge a binary stream of markers inside the obsstore |
|
629 | 629 | |
|
630 | 630 | Returns the number of new markers added.""" |
|
631 | 631 | version, markers = _readmarkers(data) |
|
632 | 632 | return self.add(transaction, markers) |
|
633 | 633 | |
|
634 | 634 | @propertycache |
|
635 | 635 | def _data(self): |
|
636 | 636 | return self.svfs.tryread('obsstore') |
|
637 | 637 | |
|
638 | 638 | @propertycache |
|
639 | 639 | def _version(self): |
|
640 | 640 | if len(self._data) >= 1: |
|
641 | 641 | return _readmarkerversion(self._data) |
|
642 | 642 | else: |
|
643 | 643 | return self._defaultformat |
|
644 | 644 | |
|
645 | 645 | @propertycache |
|
646 | 646 | def _all(self): |
|
647 | 647 | data = self._data |
|
648 | 648 | if not data: |
|
649 | 649 | return [] |
|
650 | 650 | self._version, markers = _readmarkers(data) |
|
651 | 651 | markers = list(markers) |
|
652 | 652 | _checkinvalidmarkers(markers) |
|
653 | 653 | return markers |
|
654 | 654 | |
|
655 | 655 | @propertycache |
|
656 | 656 | def successors(self): |
|
657 | 657 | successors = {} |
|
658 | 658 | _addsuccessors(successors, self._all) |
|
659 | 659 | return successors |
|
660 | 660 | |
|
661 | 661 | @propertycache |
|
662 | 662 | def precursors(self): |
|
663 | 663 | precursors = {} |
|
664 | 664 | _addprecursors(precursors, self._all) |
|
665 | 665 | return precursors |
|
666 | 666 | |
|
667 | 667 | @propertycache |
|
668 | 668 | def children(self): |
|
669 | 669 | children = {} |
|
670 | 670 | _addchildren(children, self._all) |
|
671 | 671 | return children |
|
672 | 672 | |
|
673 | 673 | def _cached(self, attr): |
|
674 | 674 | return attr in self.__dict__ |
|
675 | 675 | |
|
676 | def _addmarkers(self, markers): | |
|
676 | def _addmarkers(self, markers, rawdata): | |
|
677 | 677 | markers = list(markers) # to allow repeated iteration |
|
678 | self._data = self._data + rawdata | |
|
678 | 679 | self._all.extend(markers) |
|
679 | 680 | if self._cached('successors'): |
|
680 | 681 | _addsuccessors(self.successors, markers) |
|
681 | 682 | if self._cached('precursors'): |
|
682 | 683 | _addprecursors(self.precursors, markers) |
|
683 | 684 | if self._cached('children'): |
|
684 | 685 | _addchildren(self.children, markers) |
|
685 | 686 | _checkinvalidmarkers(markers) |
|
686 | 687 | |
|
687 | 688 | def relevantmarkers(self, nodes): |
|
688 | 689 | """return a set of all obsolescence markers relevant to a set of nodes. |
|
689 | 690 | |
|
690 | 691 | "relevant" to a set of nodes mean: |
|
691 | 692 | |
|
692 | 693 | - marker that use this changeset as successor |
|
693 | 694 | - prune marker of direct children on this changeset |
|
694 | 695 | - recursive application of the two rules on precursors of these markers |
|
695 | 696 | |
|
696 | 697 | It is a set so you cannot rely on order.""" |
|
697 | 698 | |
|
698 | 699 | pendingnodes = set(nodes) |
|
699 | 700 | seenmarkers = set() |
|
700 | 701 | seennodes = set(pendingnodes) |
|
701 | 702 | precursorsmarkers = self.precursors |
|
702 | 703 | succsmarkers = self.successors |
|
703 | 704 | children = self.children |
|
704 | 705 | while pendingnodes: |
|
705 | 706 | direct = set() |
|
706 | 707 | for current in pendingnodes: |
|
707 | 708 | direct.update(precursorsmarkers.get(current, ())) |
|
708 | 709 | pruned = [m for m in children.get(current, ()) if not m[1]] |
|
709 | 710 | direct.update(pruned) |
|
710 | 711 | pruned = [m for m in succsmarkers.get(current, ()) if not m[1]] |
|
711 | 712 | direct.update(pruned) |
|
712 | 713 | direct -= seenmarkers |
|
713 | 714 | pendingnodes = set([m[0] for m in direct]) |
|
714 | 715 | seenmarkers |= direct |
|
715 | 716 | pendingnodes -= seennodes |
|
716 | 717 | seennodes |= pendingnodes |
|
717 | 718 | return seenmarkers |
|
718 | 719 | |
|
719 | 720 | def makestore(ui, repo): |
|
720 | 721 | """Create an obsstore instance from a repo.""" |
|
721 | 722 | # read default format for new obsstore. |
|
722 | 723 | # developer config: format.obsstore-version |
|
723 | 724 | defaultformat = ui.configint('format', 'obsstore-version') |
|
724 | 725 | # rely on obsstore class default when possible. |
|
725 | 726 | kwargs = {} |
|
726 | 727 | if defaultformat is not None: |
|
727 | 728 | kwargs['defaultformat'] = defaultformat |
|
728 | 729 | readonly = not isenabled(repo, createmarkersopt) |
|
729 | 730 | store = obsstore(repo.svfs, readonly=readonly, **kwargs) |
|
730 | 731 | if store and readonly: |
|
731 | 732 | ui.warn(_('obsolete feature not enabled but %i markers found!\n') |
|
732 | 733 | % len(list(store))) |
|
733 | 734 | return store |
|
734 | 735 | |
|
735 | 736 | def commonversion(versions): |
|
736 | 737 | """Return the newest version listed in both versions and our local formats. |
|
737 | 738 | |
|
738 | 739 | Returns None if no common version exists. |
|
739 | 740 | """ |
|
740 | 741 | versions.sort(reverse=True) |
|
741 | 742 | # search for highest version known on both side |
|
742 | 743 | for v in versions: |
|
743 | 744 | if v in formats: |
|
744 | 745 | return v |
|
745 | 746 | return None |
|
746 | 747 | |
|
747 | 748 | # arbitrary picked to fit into 8K limit from HTTP server |
|
748 | 749 | # you have to take in account: |
|
749 | 750 | # - the version header |
|
750 | 751 | # - the base85 encoding |
|
751 | 752 | _maxpayload = 5300 |
|
752 | 753 | |
|
753 | 754 | def _pushkeyescape(markers): |
|
754 | 755 | """encode markers into a dict suitable for pushkey exchange |
|
755 | 756 | |
|
756 | 757 | - binary data is base85 encoded |
|
757 | 758 | - split in chunks smaller than 5300 bytes""" |
|
758 | 759 | keys = {} |
|
759 | 760 | parts = [] |
|
760 | 761 | currentlen = _maxpayload * 2 # ensure we create a new part |
|
761 | 762 | for marker in markers: |
|
762 | 763 | nextdata = _fm0encodeonemarker(marker) |
|
763 | 764 | if (len(nextdata) + currentlen > _maxpayload): |
|
764 | 765 | currentpart = [] |
|
765 | 766 | currentlen = 0 |
|
766 | 767 | parts.append(currentpart) |
|
767 | 768 | currentpart.append(nextdata) |
|
768 | 769 | currentlen += len(nextdata) |
|
769 | 770 | for idx, part in enumerate(reversed(parts)): |
|
770 | 771 | data = ''.join([_pack('>B', _fm0version)] + part) |
|
771 | 772 | keys['dump%i' % idx] = util.b85encode(data) |
|
772 | 773 | return keys |
|
773 | 774 | |
|
774 | 775 | def listmarkers(repo): |
|
775 | 776 | """List markers over pushkey""" |
|
776 | 777 | if not repo.obsstore: |
|
777 | 778 | return {} |
|
778 | 779 | return _pushkeyescape(sorted(repo.obsstore)) |
|
779 | 780 | |
|
780 | 781 | def pushmarker(repo, key, old, new): |
|
781 | 782 | """Push markers over pushkey""" |
|
782 | 783 | if not key.startswith('dump'): |
|
783 | 784 | repo.ui.warn(_('unknown key: %r') % key) |
|
784 | 785 | return False |
|
785 | 786 | if old: |
|
786 | 787 | repo.ui.warn(_('unexpected old value for %r') % key) |
|
787 | 788 | return False |
|
788 | 789 | data = util.b85decode(new) |
|
789 | 790 | lock = repo.lock() |
|
790 | 791 | try: |
|
791 | 792 | tr = repo.transaction('pushkey: obsolete markers') |
|
792 | 793 | try: |
|
793 | 794 | repo.obsstore.mergemarkers(tr, data) |
|
794 | 795 | repo.invalidatevolatilesets() |
|
795 | 796 | tr.close() |
|
796 | 797 | return True |
|
797 | 798 | finally: |
|
798 | 799 | tr.release() |
|
799 | 800 | finally: |
|
800 | 801 | lock.release() |
|
801 | 802 | |
|
802 | 803 | # keep compatibility for the 4.3 cycle |
|
803 | 804 | def allprecursors(obsstore, nodes, ignoreflags=0): |
|
804 | 805 | movemsg = 'obsolete.allprecursors moved to obsutil.allprecursors' |
|
805 | 806 | util.nouideprecwarn(movemsg, '4.3') |
|
806 | 807 | return obsutil.allprecursors(obsstore, nodes, ignoreflags) |
|
807 | 808 | |
|
808 | 809 | def allsuccessors(obsstore, nodes, ignoreflags=0): |
|
809 | 810 | movemsg = 'obsolete.allsuccessors moved to obsutil.allsuccessors' |
|
810 | 811 | util.nouideprecwarn(movemsg, '4.3') |
|
811 | 812 | return obsutil.allsuccessors(obsstore, nodes, ignoreflags) |
|
812 | 813 | |
|
813 | 814 | def marker(repo, data): |
|
814 | 815 | movemsg = 'obsolete.marker moved to obsutil.marker' |
|
815 | 816 | repo.ui.deprecwarn(movemsg, '4.3') |
|
816 | 817 | return obsutil.marker(repo, data) |
|
817 | 818 | |
|
818 | 819 | def getmarkers(repo, nodes=None, exclusive=False): |
|
819 | 820 | movemsg = 'obsolete.getmarkers moved to obsutil.getmarkers' |
|
820 | 821 | repo.ui.deprecwarn(movemsg, '4.3') |
|
821 | 822 | return obsutil.getmarkers(repo, nodes=nodes, exclusive=exclusive) |
|
822 | 823 | |
|
823 | 824 | def exclusivemarkers(repo, nodes): |
|
824 | 825 | movemsg = 'obsolete.exclusivemarkers moved to obsutil.exclusivemarkers' |
|
825 | 826 | repo.ui.deprecwarn(movemsg, '4.3') |
|
826 | 827 | return obsutil.exclusivemarkers(repo, nodes) |
|
827 | 828 | |
|
828 | 829 | def foreground(repo, nodes): |
|
829 | 830 | movemsg = 'obsolete.foreground moved to obsutil.foreground' |
|
830 | 831 | repo.ui.deprecwarn(movemsg, '4.3') |
|
831 | 832 | return obsutil.foreground(repo, nodes) |
|
832 | 833 | |
|
833 | 834 | def successorssets(repo, initialnode, cache=None): |
|
834 | 835 | movemsg = 'obsolete.successorssets moved to obsutil.successorssets' |
|
835 | 836 | repo.ui.deprecwarn(movemsg, '4.3') |
|
836 | 837 | return obsutil.successorssets(repo, initialnode, cache=cache) |
|
837 | 838 | |
|
838 | 839 | # mapping of 'set-name' -> <function to compute this set> |
|
839 | 840 | cachefuncs = {} |
|
840 | 841 | def cachefor(name): |
|
841 | 842 | """Decorator to register a function as computing the cache for a set""" |
|
842 | 843 | def decorator(func): |
|
843 | 844 | if name in cachefuncs: |
|
844 | 845 | msg = "duplicated registration for volatileset '%s' (existing: %r)" |
|
845 | 846 | raise error.ProgrammingError(msg % (name, cachefuncs[name])) |
|
846 | 847 | cachefuncs[name] = func |
|
847 | 848 | return func |
|
848 | 849 | return decorator |
|
849 | 850 | |
|
850 | 851 | def getrevs(repo, name): |
|
851 | 852 | """Return the set of revision that belong to the <name> set |
|
852 | 853 | |
|
853 | 854 | Such access may compute the set and cache it for future use""" |
|
854 | 855 | repo = repo.unfiltered() |
|
855 | 856 | if not repo.obsstore: |
|
856 | 857 | return frozenset() |
|
857 | 858 | if name not in repo.obsstore.caches: |
|
858 | 859 | repo.obsstore.caches[name] = cachefuncs[name](repo) |
|
859 | 860 | return repo.obsstore.caches[name] |
|
860 | 861 | |
|
861 | 862 | # To be simple we need to invalidate obsolescence cache when: |
|
862 | 863 | # |
|
863 | 864 | # - new changeset is added: |
|
864 | 865 | # - public phase is changed |
|
865 | 866 | # - obsolescence marker are added |
|
866 | 867 | # - strip is used a repo |
|
867 | 868 | def clearobscaches(repo): |
|
868 | 869 | """Remove all obsolescence related cache from a repo |
|
869 | 870 | |
|
870 | 871 | This remove all cache in obsstore is the obsstore already exist on the |
|
871 | 872 | repo. |
|
872 | 873 | |
|
873 | 874 | (We could be smarter here given the exact event that trigger the cache |
|
874 | 875 | clearing)""" |
|
875 | 876 | # only clear cache is there is obsstore data in this repo |
|
876 | 877 | if 'obsstore' in repo._filecache: |
|
877 | 878 | repo.obsstore.caches.clear() |
|
878 | 879 | |
|
879 | 880 | def _mutablerevs(repo): |
|
880 | 881 | """the set of mutable revision in the repository""" |
|
881 | 882 | return repo._phasecache.getrevset(repo, (phases.draft, phases.secret)) |
|
882 | 883 | |
|
883 | 884 | @cachefor('obsolete') |
|
884 | 885 | def _computeobsoleteset(repo): |
|
885 | 886 | """the set of obsolete revisions""" |
|
886 | 887 | getnode = repo.changelog.node |
|
887 | 888 | notpublic = _mutablerevs(repo) |
|
888 | 889 | isobs = repo.obsstore.successors.__contains__ |
|
889 | 890 | obs = set(r for r in notpublic if isobs(getnode(r))) |
|
890 | 891 | return obs |
|
891 | 892 | |
|
892 | 893 | @cachefor('unstable') |
|
893 | 894 | def _computeunstableset(repo): |
|
894 | 895 | """the set of non obsolete revisions with obsolete parents""" |
|
895 | 896 | pfunc = repo.changelog.parentrevs |
|
896 | 897 | mutable = _mutablerevs(repo) |
|
897 | 898 | obsolete = getrevs(repo, 'obsolete') |
|
898 | 899 | others = mutable - obsolete |
|
899 | 900 | unstable = set() |
|
900 | 901 | for r in sorted(others): |
|
901 | 902 | # A rev is unstable if one of its parent is obsolete or unstable |
|
902 | 903 | # this works since we traverse following growing rev order |
|
903 | 904 | for p in pfunc(r): |
|
904 | 905 | if p in obsolete or p in unstable: |
|
905 | 906 | unstable.add(r) |
|
906 | 907 | break |
|
907 | 908 | return unstable |
|
908 | 909 | |
|
909 | 910 | @cachefor('suspended') |
|
910 | 911 | def _computesuspendedset(repo): |
|
911 | 912 | """the set of obsolete parents with non obsolete descendants""" |
|
912 | 913 | suspended = repo.changelog.ancestors(getrevs(repo, 'unstable')) |
|
913 | 914 | return set(r for r in getrevs(repo, 'obsolete') if r in suspended) |
|
914 | 915 | |
|
915 | 916 | @cachefor('extinct') |
|
916 | 917 | def _computeextinctset(repo): |
|
917 | 918 | """the set of obsolete parents without non obsolete descendants""" |
|
918 | 919 | return getrevs(repo, 'obsolete') - getrevs(repo, 'suspended') |
|
919 | 920 | |
|
920 | 921 | |
|
921 | 922 | @cachefor('bumped') |
|
922 | 923 | def _computebumpedset(repo): |
|
923 | 924 | """the set of revs trying to obsolete public revisions""" |
|
924 | 925 | bumped = set() |
|
925 | 926 | # util function (avoid attribute lookup in the loop) |
|
926 | 927 | phase = repo._phasecache.phase # would be faster to grab the full list |
|
927 | 928 | public = phases.public |
|
928 | 929 | cl = repo.changelog |
|
929 | 930 | torev = cl.nodemap.get |
|
930 | 931 | for ctx in repo.set('(not public()) and (not obsolete())'): |
|
931 | 932 | rev = ctx.rev() |
|
932 | 933 | # We only evaluate mutable, non-obsolete revision |
|
933 | 934 | node = ctx.node() |
|
934 | 935 | # (future) A cache of precursors may worth if split is very common |
|
935 | 936 | for pnode in obsutil.allprecursors(repo.obsstore, [node], |
|
936 | 937 | ignoreflags=bumpedfix): |
|
937 | 938 | prev = torev(pnode) # unfiltered! but so is phasecache |
|
938 | 939 | if (prev is not None) and (phase(repo, prev) <= public): |
|
939 | 940 | # we have a public precursor |
|
940 | 941 | bumped.add(rev) |
|
941 | 942 | break # Next draft! |
|
942 | 943 | return bumped |
|
943 | 944 | |
|
944 | 945 | @cachefor('divergent') |
|
945 | 946 | def _computedivergentset(repo): |
|
946 | 947 | """the set of rev that compete to be the final successors of some revision. |
|
947 | 948 | """ |
|
948 | 949 | divergent = set() |
|
949 | 950 | obsstore = repo.obsstore |
|
950 | 951 | newermap = {} |
|
951 | 952 | for ctx in repo.set('(not public()) - obsolete()'): |
|
952 | 953 | mark = obsstore.precursors.get(ctx.node(), ()) |
|
953 | 954 | toprocess = set(mark) |
|
954 | 955 | seen = set() |
|
955 | 956 | while toprocess: |
|
956 | 957 | prec = toprocess.pop()[0] |
|
957 | 958 | if prec in seen: |
|
958 | 959 | continue # emergency cycle hanging prevention |
|
959 | 960 | seen.add(prec) |
|
960 | 961 | if prec not in newermap: |
|
961 | 962 | obsutil.successorssets(repo, prec, cache=newermap) |
|
962 | 963 | newer = [n for n in newermap[prec] if n] |
|
963 | 964 | if len(newer) > 1: |
|
964 | 965 | divergent.add(ctx.rev()) |
|
965 | 966 | break |
|
966 | 967 | toprocess.update(obsstore.precursors.get(prec, ())) |
|
967 | 968 | return divergent |
|
968 | 969 | |
|
969 | 970 | |
|
970 | 971 | def createmarkers(repo, relations, flag=0, date=None, metadata=None, |
|
971 | 972 | operation=None): |
|
972 | 973 | """Add obsolete markers between changesets in a repo |
|
973 | 974 | |
|
974 | 975 | <relations> must be an iterable of (<old>, (<new>, ...)[,{metadata}]) |
|
975 | 976 | tuple. `old` and `news` are changectx. metadata is an optional dictionary |
|
976 | 977 | containing metadata for this marker only. It is merged with the global |
|
977 | 978 | metadata specified through the `metadata` argument of this function, |
|
978 | 979 | |
|
979 | 980 | Trying to obsolete a public changeset will raise an exception. |
|
980 | 981 | |
|
981 | 982 | Current user and date are used except if specified otherwise in the |
|
982 | 983 | metadata attribute. |
|
983 | 984 | |
|
984 | 985 | This function operates within a transaction of its own, but does |
|
985 | 986 | not take any lock on the repo. |
|
986 | 987 | """ |
|
987 | 988 | # prepare metadata |
|
988 | 989 | if metadata is None: |
|
989 | 990 | metadata = {} |
|
990 | 991 | if 'user' not in metadata: |
|
991 | 992 | metadata['user'] = repo.ui.username() |
|
992 | 993 | useoperation = repo.ui.configbool('experimental', |
|
993 | 994 | 'evolution.track-operation', |
|
994 | 995 | False) |
|
995 | 996 | if useoperation and operation: |
|
996 | 997 | metadata['operation'] = operation |
|
997 | 998 | tr = repo.transaction('add-obsolescence-marker') |
|
998 | 999 | try: |
|
999 | 1000 | markerargs = [] |
|
1000 | 1001 | for rel in relations: |
|
1001 | 1002 | prec = rel[0] |
|
1002 | 1003 | sucs = rel[1] |
|
1003 | 1004 | localmetadata = metadata.copy() |
|
1004 | 1005 | if 2 < len(rel): |
|
1005 | 1006 | localmetadata.update(rel[2]) |
|
1006 | 1007 | |
|
1007 | 1008 | if not prec.mutable(): |
|
1008 | 1009 | raise error.Abort(_("cannot obsolete public changeset: %s") |
|
1009 | 1010 | % prec, |
|
1010 | 1011 | hint="see 'hg help phases' for details") |
|
1011 | 1012 | nprec = prec.node() |
|
1012 | 1013 | nsucs = tuple(s.node() for s in sucs) |
|
1013 | 1014 | npare = None |
|
1014 | 1015 | if not nsucs: |
|
1015 | 1016 | npare = tuple(p.node() for p in prec.parents()) |
|
1016 | 1017 | if nprec in nsucs: |
|
1017 | 1018 | raise error.Abort(_("changeset %s cannot obsolete itself") |
|
1018 | 1019 | % prec) |
|
1019 | 1020 | |
|
1020 | 1021 | # Creating the marker causes the hidden cache to become invalid, |
|
1021 | 1022 | # which causes recomputation when we ask for prec.parents() above. |
|
1022 | 1023 | # Resulting in n^2 behavior. So let's prepare all of the args |
|
1023 | 1024 | # first, then create the markers. |
|
1024 | 1025 | markerargs.append((nprec, nsucs, npare, localmetadata)) |
|
1025 | 1026 | |
|
1026 | 1027 | for args in markerargs: |
|
1027 | 1028 | nprec, nsucs, npare, localmetadata = args |
|
1028 | 1029 | repo.obsstore.create(tr, nprec, nsucs, flag, parents=npare, |
|
1029 | 1030 | date=date, metadata=localmetadata, |
|
1030 | 1031 | ui=repo.ui) |
|
1031 | 1032 | repo.filteredrevcache.clear() |
|
1032 | 1033 | tr.close() |
|
1033 | 1034 | finally: |
|
1034 | 1035 | tr.release() |
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