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annotate mercurial/revlogutils/revlogv0.py @ 52668:5cc8deb96b48

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pyupgrade: modernize calls to superclass methods This is the `legacy` fixer in `pyupgrade`, with the loop yielding the offset of `yield` statements commented out.
author Matt Harbison <matt_harbison@yahoo.com>
date Sun, 05 Jan 2025 22:23:31 -0500
parents 609700e5d8df
children 8de68446a5bd
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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
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8 from __future__ import annotations
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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 INDEX_ENTRY_V0,
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13 )
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14 from ..i18n import _
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15
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16 from .. import (
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17 error,
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18 node,
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19 revlogutils,
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20 util,
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21 )
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22
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23 from . import (
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24 nodemap as nodemaputil,
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25 )
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26
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27
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28 def getoffset(q):
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29 return int(q >> 16)
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30
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31
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32 def gettype(q):
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33 return int(q & 0xFFFF)
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34
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35
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36 class revlogoldindex(list):
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37 rust_ext_compat = 0
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38 entry_size = INDEX_ENTRY_V0.size
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39 null_item = revlogutils.entry(
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40 data_offset=0,
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41 data_compressed_length=0,
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42 data_delta_base=node.nullrev,
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43 link_rev=node.nullrev,
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44 parent_rev_1=node.nullrev,
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45 parent_rev_2=node.nullrev,
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46 node_id=sha1nodeconstants.nullid,
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47 )
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48
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49 @util.propertycache
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50 def _nodemap(self):
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51 nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: node.nullrev})
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52 for r in range(0, len(self)):
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53 n = self[r][7]
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54 nodemap[n] = r
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55 return nodemap
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56
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57 def has_node(self, node):
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58 """return True if the node exist in the index"""
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59 return node in self._nodemap
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60
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61 def rev(self, node):
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62 """return a revision for a node
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63
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64 If the node is unknown, raise a RevlogError"""
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65 return self._nodemap[node]
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66
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67 def get_rev(self, node):
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68 """return a revision for a node
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69
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70 If the node is unknown, return None"""
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71 return self._nodemap.get(node)
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72
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73 def append(self, tup):
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74 self._nodemap[tup[7]] = len(self)
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75 super().append(tup)
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76
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77 def __delitem__(self, i):
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78 if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
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79 raise ValueError(b"deleting slices only supports a:-1 with step 1")
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80 for r in range(i.start, len(self)):
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81 del self._nodemap[self[r][7]]
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82 super().__delitem__(i)
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83
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84 def clearcaches(self):
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85 self.__dict__.pop('_nodemap', None)
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86
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87 def __getitem__(self, i):
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88 if i == -1:
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89 return self.null_item
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90 return list.__getitem__(self, i)
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91
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92 def pack_header(self, header):
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93 """pack header information in binary"""
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94 return b''
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95
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96 def entry_binary(self, rev):
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97 """return the raw binary string representing a revision"""
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98 entry = self[rev]
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99 if gettype(entry[0]):
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100 raise error.RevlogError(
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101 _(b'index entry flags need revlog version 1')
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102 )
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103 e2 = (
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104 getoffset(entry[0]),
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105 entry[1],
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106 entry[3],
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107 entry[4],
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108 self[entry[5]][7],
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109 self[entry[6]][7],
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110 entry[7],
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111 )
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112 return INDEX_ENTRY_V0.pack(*e2)
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113
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114 def headrevs(self, excluded_revs=None, stop_rev=None):
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115 count = len(self)
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116 if stop_rev is not None:
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117 count = min(count, stop_rev)
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118 if not count:
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119 return [node.nullrev]
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120 # we won't iter over filtered rev so nobody is a head at start
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121 ishead = [0] * (count + 1)
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122 revs = range(count)
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123 if excluded_revs is not None:
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124 revs = (r for r in revs if r not in excluded_revs)
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125
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126 for r in revs:
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127 ishead[r] = 1 # I may be an head
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128 e = self[r]
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129 ishead[e[5]] = ishead[e[6]] = 0 # my parent are not
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130 return [r for r, val in enumerate(ishead) if val]
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131
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132
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133 def parse_index_v0(data, inline):
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134 s = INDEX_ENTRY_V0.size
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135 index = []
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136 nodemap = nodemaputil.NodeMap({node.nullid: node.nullrev})
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137 n = off = 0
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138 l = len(data)
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139 while off + s <= l:
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140 cur = data[off : off + s]
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141 off += s
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142 e = INDEX_ENTRY_V0.unpack(cur)
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143 # transform to revlogv1 format
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144 e2 = revlogutils.entry(
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145 data_offset=e[0],
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146 data_compressed_length=e[1],
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147 data_delta_base=e[2],
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148 link_rev=e[3],
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149 parent_rev_1=nodemap.get(e[4], node.nullrev),
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150 parent_rev_2=nodemap.get(e[5], node.nullrev),
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151 node_id=e[6],
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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