Mercurial > hg
annotate mercurial/revlogutils/revlogv0.py @ 47394:ac60a1366a49
revlog: move `offset_type` to `revlogutils`
This multiple module are using this so it make sense to move it at the utility
level.
Differential Revision: https://phab.mercurial-scm.org/D10792
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sun, 30 May 2021 16:19:36 +0200 |
parents | 9d1a8829f959 |
children | 8f87dcb46f53 |
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1 # revlogv0 - code related to revlog format "V0" |
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2 # |
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3 # Copyright 2005-2007 Olivia Mackall <olivia@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 from __future__ import absolute_import |
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8 |
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9 |
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10 from ..node import sha1nodeconstants |
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11 from .constants import ( |
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12 COMP_MODE_INLINE, |
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13 INDEX_ENTRY_V0, |
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14 ) |
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15 from ..i18n import _ |
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16 |
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17 from .. import ( |
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18 error, |
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19 node, |
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20 pycompat, |
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21 revlogutils, |
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22 util, |
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23 ) |
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24 |
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25 from . import ( |
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26 flagutil, |
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27 nodemap as nodemaputil, |
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28 ) |
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29 |
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30 |
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31 def getoffset(q): |
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32 return int(q >> 16) |
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33 |
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34 |
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35 def gettype(q): |
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36 return int(q & 0xFFFF) |
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37 |
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38 |
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39 class revlogoldindex(list): |
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40 rust_ext_compat = 0 |
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41 entry_size = INDEX_ENTRY_V0.size |
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42 null_item = ( |
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43 0, |
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44 0, |
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45 0, |
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46 -1, |
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47 -1, |
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48 -1, |
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49 -1, |
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50 sha1nodeconstants.nullid, |
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51 0, |
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52 0, |
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53 COMP_MODE_INLINE, |
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54 COMP_MODE_INLINE, |
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55 ) |
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56 |
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57 @property |
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58 def nodemap(self): |
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59 msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]" |
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60 util.nouideprecwarn(msg, b'5.3', stacklevel=2) |
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61 return self._nodemap |
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62 |
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63 @util.propertycache |
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64 def _nodemap(self): |
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65 nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: node.nullrev}) |
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66 for r in range(0, len(self)): |
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67 n = self[r][7] |
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68 nodemap[n] = r |
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69 return nodemap |
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70 |
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71 def has_node(self, node): |
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72 """return True if the node exist in the index""" |
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73 return node in self._nodemap |
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74 |
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75 def rev(self, node): |
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76 """return a revision for a node |
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77 |
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78 If the node is unknown, raise a RevlogError""" |
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79 return self._nodemap[node] |
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80 |
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81 def get_rev(self, node): |
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82 """return a revision for a node |
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83 |
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84 If the node is unknown, return None""" |
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85 return self._nodemap.get(node) |
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86 |
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87 def append(self, tup): |
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88 self._nodemap[tup[7]] = len(self) |
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89 super(revlogoldindex, self).append(tup) |
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90 |
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91 def __delitem__(self, i): |
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92 if not isinstance(i, slice) or not i.stop == -1 or i.step is not None: |
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93 raise ValueError(b"deleting slices only supports a:-1 with step 1") |
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94 for r in pycompat.xrange(i.start, len(self)): |
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95 del self._nodemap[self[r][7]] |
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96 super(revlogoldindex, self).__delitem__(i) |
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97 |
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98 def clearcaches(self): |
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99 self.__dict__.pop('_nodemap', None) |
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100 |
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101 def __getitem__(self, i): |
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102 if i == -1: |
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103 return self.null_item |
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104 return list.__getitem__(self, i) |
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105 |
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106 def pack_header(self, header): |
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107 """pack header information in binary""" |
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108 return b'' |
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109 |
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110 def entry_binary(self, rev): |
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111 """return the raw binary string representing a revision""" |
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112 entry = self[rev] |
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113 if gettype(entry[0]): |
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114 raise error.RevlogError( |
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115 _(b'index entry flags need revlog version 1') |
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116 ) |
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117 e2 = ( |
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118 getoffset(entry[0]), |
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119 entry[1], |
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120 entry[3], |
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121 entry[4], |
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122 self[entry[5]][7], |
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123 self[entry[6]][7], |
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124 entry[7], |
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125 ) |
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126 return INDEX_ENTRY_V0.pack(*e2) |
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127 |
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128 |
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129 def parse_index_v0(data, inline): |
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130 s = INDEX_ENTRY_V0.size |
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131 index = [] |
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132 nodemap = nodemaputil.NodeMap({node.nullid: node.nullrev}) |
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133 n = off = 0 |
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134 l = len(data) |
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135 while off + s <= l: |
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136 cur = data[off : off + s] |
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137 off += s |
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138 e = INDEX_ENTRY_V0.unpack(cur) |
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139 # transform to revlogv1 format |
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140 e2 = ( |
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141 revlogutils.offset_type(e[0], 0), |
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142 e[1], |
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143 -1, |
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144 e[2], |
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145 e[3], |
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146 nodemap.get(e[4], node.nullrev), |
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147 nodemap.get(e[5], node.nullrev), |
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148 e[6], |
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149 0, # no side data support |
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150 0, # no side data support |
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151 COMP_MODE_INLINE, |
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152 ) |
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153 index.append(e2) |
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154 nodemap[e[6]] = n |
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155 n += 1 |
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156 |
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157 index = revlogoldindex(index) |
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158 return index, None |