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1 | 1 | # changelog.py - changelog class for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2005-2007 Olivia Mackall <olivia@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | |
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9 | 9 | from .i18n import _ |
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10 | 10 | from .node import ( |
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11 | 11 | bin, |
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12 | 12 | hex, |
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13 | 13 | ) |
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14 | 14 | from .thirdparty import attr |
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15 | 15 | |
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16 | 16 | from . import ( |
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17 | 17 | encoding, |
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18 | 18 | error, |
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19 | 19 | metadata, |
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20 | 20 | pycompat, |
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21 | 21 | revlog, |
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22 | 22 | ) |
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23 | 23 | from .utils import ( |
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24 | 24 | dateutil, |
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25 | 25 | stringutil, |
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26 | 26 | ) |
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27 | 27 | from .revlogutils import ( |
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28 | 28 | constants as revlog_constants, |
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29 | 29 | flagutil, |
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30 | 30 | ) |
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31 | 31 | |
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32 | 32 | _defaultextra = {b'branch': b'default'} |
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33 | 33 | |
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34 | 34 | |
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35 | 35 | def _string_escape(text): |
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36 | 36 | """ |
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37 | 37 | >>> from .pycompat import bytechr as chr |
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38 | 38 | >>> d = {b'nl': chr(10), b'bs': chr(92), b'cr': chr(13), b'nul': chr(0)} |
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39 | 39 | >>> s = b"ab%(nl)scd%(bs)s%(bs)sn%(nul)s12ab%(cr)scd%(bs)s%(nl)s" % d |
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40 | 40 | >>> s |
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41 | 41 | 'ab\\ncd\\\\\\\\n\\x0012ab\\rcd\\\\\\n' |
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42 | 42 | >>> res = _string_escape(s) |
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43 | 43 | >>> s == _string_unescape(res) |
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44 | 44 | True |
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45 | 45 | """ |
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46 | 46 | # subset of the string_escape codec |
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47 | 47 | text = ( |
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48 | 48 | text.replace(b'\\', b'\\\\') |
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49 | 49 | .replace(b'\n', b'\\n') |
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50 | 50 | .replace(b'\r', b'\\r') |
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51 | 51 | ) |
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52 | 52 | return text.replace(b'\0', b'\\0') |
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53 | 53 | |
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54 | 54 | |
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55 | 55 | def _string_unescape(text): |
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56 | 56 | if b'\\0' in text: |
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57 | 57 | # fix up \0 without getting into trouble with \\0 |
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58 | 58 | text = text.replace(b'\\\\', b'\\\\\n') |
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59 | 59 | text = text.replace(b'\\0', b'\0') |
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60 | 60 | text = text.replace(b'\n', b'') |
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61 | 61 | return stringutil.unescapestr(text) |
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62 | 62 | |
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63 | 63 | |
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64 | 64 | def decodeextra(text): |
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65 | 65 | """ |
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66 | 66 | >>> from .pycompat import bytechr as chr |
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67 | 67 | >>> sorted(decodeextra(encodeextra({b'foo': b'bar', b'baz': chr(0) + b'2'}) |
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68 | 68 | ... ).items()) |
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69 | 69 | [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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70 | 70 | >>> sorted(decodeextra(encodeextra({b'foo': b'bar', |
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71 | 71 | ... b'baz': chr(92) + chr(0) + b'2'}) |
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72 | 72 | ... ).items()) |
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73 | 73 | [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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74 | 74 | """ |
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75 | 75 | extra = _defaultextra.copy() |
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76 | 76 | for l in text.split(b'\0'): |
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77 | 77 | if l: |
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78 | 78 | k, v = _string_unescape(l).split(b':', 1) |
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79 | 79 | extra[k] = v |
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80 | 80 | return extra |
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81 | 81 | |
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82 | 82 | |
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83 | 83 | def encodeextra(d): |
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84 | 84 | # keys must be sorted to produce a deterministic changelog entry |
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85 | 85 | items = [_string_escape(b'%s:%s' % (k, d[k])) for k in sorted(d)] |
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86 | 86 | return b"\0".join(items) |
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87 | 87 | |
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88 | 88 | |
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89 | 89 | def stripdesc(desc): |
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90 | 90 | """strip trailing whitespace and leading and trailing empty lines""" |
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91 | 91 | return b'\n'.join([l.rstrip() for l in desc.splitlines()]).strip(b'\n') |
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92 | 92 | |
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93 | 93 | |
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94 | 94 | @attr.s |
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95 | 95 | class _changelogrevision: |
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96 | 96 | # Extensions might modify _defaultextra, so let the constructor below pass |
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97 | 97 | # it in |
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98 | 98 | extra = attr.ib() |
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99 | 99 | manifest = attr.ib() |
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100 | 100 | user = attr.ib(default=b'') |
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101 | 101 | date = attr.ib(default=(0, 0)) |
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102 | 102 | files = attr.ib(default=attr.Factory(list)) |
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103 | 103 | filesadded = attr.ib(default=None) |
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104 | 104 | filesremoved = attr.ib(default=None) |
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105 | 105 | p1copies = attr.ib(default=None) |
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106 | 106 | p2copies = attr.ib(default=None) |
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107 | 107 | description = attr.ib(default=b'') |
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108 | 108 | branchinfo = attr.ib(default=(_defaultextra[b'branch'], False)) |
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109 | 109 | |
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110 | 110 | |
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111 | 111 | class changelogrevision: |
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112 | 112 | """Holds results of a parsed changelog revision. |
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113 | 113 | |
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114 | 114 | Changelog revisions consist of multiple pieces of data, including |
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115 | 115 | the manifest node, user, and date. This object exposes a view into |
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116 | 116 | the parsed object. |
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117 | 117 | """ |
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118 | 118 | |
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119 | 119 | __slots__ = ( |
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120 | 120 | '_offsets', |
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121 | 121 | '_text', |
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122 | 122 | '_sidedata', |
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123 | 123 | '_cpsd', |
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124 | 124 | '_changes', |
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125 | 125 | ) |
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126 | 126 | |
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127 | 127 | def __new__(cls, cl, text, sidedata, cpsd): |
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128 | 128 | if not text: |
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129 | 129 | return _changelogrevision(extra=_defaultextra, manifest=cl.nullid) |
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130 | 130 | |
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131 | 131 | self = super(changelogrevision, cls).__new__(cls) |
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132 | 132 | # We could return here and implement the following as an __init__. |
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133 | 133 | # But doing it here is equivalent and saves an extra function call. |
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134 | 134 | |
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135 | 135 | # format used: |
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136 | 136 | # nodeid\n : manifest node in ascii |
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137 | 137 | # user\n : user, no \n or \r allowed |
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138 | 138 | # time tz extra\n : date (time is int or float, timezone is int) |
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139 | 139 | # : extra is metadata, encoded and separated by '\0' |
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140 | 140 | # : older versions ignore it |
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141 | 141 | # files\n\n : files modified by the cset, no \n or \r allowed |
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142 | 142 | # (.*) : comment (free text, ideally utf-8) |
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143 | 143 | # |
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144 | 144 | # changelog v0 doesn't use extra |
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145 | 145 | |
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146 | 146 | nl1 = text.index(b'\n') |
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147 | 147 | nl2 = text.index(b'\n', nl1 + 1) |
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148 | 148 | nl3 = text.index(b'\n', nl2 + 1) |
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149 | 149 | |
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150 | 150 | # The list of files may be empty. Which means nl3 is the first of the |
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151 | 151 | # double newline that precedes the description. |
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152 | 152 | if text[nl3 + 1 : nl3 + 2] == b'\n': |
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153 | 153 | doublenl = nl3 |
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154 | 154 | else: |
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155 | 155 | doublenl = text.index(b'\n\n', nl3 + 1) |
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156 | 156 | |
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157 | 157 | self._offsets = (nl1, nl2, nl3, doublenl) |
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158 | 158 | self._text = text |
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159 | 159 | self._sidedata = sidedata |
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160 | 160 | self._cpsd = cpsd |
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161 | 161 | self._changes = None |
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162 | 162 | |
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163 | 163 | return self |
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164 | 164 | |
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165 | 165 | @property |
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166 | 166 | def manifest(self): |
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167 | 167 | return bin(self._text[0 : self._offsets[0]]) |
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168 | 168 | |
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169 | 169 | @property |
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170 | 170 | def user(self): |
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171 | 171 | off = self._offsets |
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172 | 172 | return encoding.tolocal(self._text[off[0] + 1 : off[1]]) |
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173 | 173 | |
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174 | 174 | @property |
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175 | 175 | def _rawdate(self): |
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176 | 176 | off = self._offsets |
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177 | 177 | dateextra = self._text[off[1] + 1 : off[2]] |
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178 | 178 | return dateextra.split(b' ', 2)[0:2] |
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179 | 179 | |
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180 | 180 | @property |
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181 | 181 | def _rawextra(self): |
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182 | 182 | off = self._offsets |
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183 | 183 | dateextra = self._text[off[1] + 1 : off[2]] |
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184 | 184 | fields = dateextra.split(b' ', 2) |
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185 | 185 | if len(fields) != 3: |
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186 | 186 | return None |
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187 | 187 | |
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188 | 188 | return fields[2] |
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189 | 189 | |
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190 | 190 | @property |
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191 | 191 | def date(self): |
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192 | 192 | raw = self._rawdate |
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193 | 193 | time = float(raw[0]) |
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194 | 194 | # Various tools did silly things with the timezone. |
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195 | 195 | try: |
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196 | 196 | timezone = int(raw[1]) |
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197 | 197 | except ValueError: |
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198 | 198 | timezone = 0 |
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199 | 199 | |
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200 | 200 | return time, timezone |
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201 | 201 | |
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202 | 202 | @property |
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203 | 203 | def extra(self): |
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204 | 204 | raw = self._rawextra |
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205 | 205 | if raw is None: |
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206 | 206 | return _defaultextra |
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207 | 207 | |
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208 | 208 | return decodeextra(raw) |
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209 | 209 | |
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210 | 210 | @property |
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211 | 211 | def changes(self): |
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212 | 212 | if self._changes is not None: |
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213 | 213 | return self._changes |
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214 | 214 | if self._cpsd: |
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215 | 215 | changes = metadata.decode_files_sidedata(self._sidedata) |
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216 | 216 | else: |
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217 | 217 | changes = metadata.ChangingFiles( |
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218 | 218 | touched=self.files or (), |
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219 | 219 | added=self.filesadded or (), |
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220 | 220 | removed=self.filesremoved or (), |
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221 | 221 | p1_copies=self.p1copies or {}, |
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222 | 222 | p2_copies=self.p2copies or {}, |
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223 | 223 | ) |
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224 | 224 | self._changes = changes |
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225 | 225 | return changes |
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226 | 226 | |
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227 | 227 | @property |
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228 | 228 | def files(self): |
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229 | 229 | if self._cpsd: |
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230 | 230 | return sorted(self.changes.touched) |
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231 | 231 | off = self._offsets |
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232 | 232 | if off[2] == off[3]: |
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233 | 233 | return [] |
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234 | 234 | |
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235 | 235 | return self._text[off[2] + 1 : off[3]].split(b'\n') |
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236 | 236 | |
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237 | 237 | @property |
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238 | 238 | def filesadded(self): |
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239 | 239 | if self._cpsd: |
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240 | 240 | return self.changes.added |
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241 | 241 | else: |
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242 | 242 | rawindices = self.extra.get(b'filesadded') |
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243 | 243 | if rawindices is None: |
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244 | 244 | return None |
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245 | 245 | return metadata.decodefileindices(self.files, rawindices) |
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246 | 246 | |
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247 | 247 | @property |
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248 | 248 | def filesremoved(self): |
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249 | 249 | if self._cpsd: |
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250 | 250 | return self.changes.removed |
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251 | 251 | else: |
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252 | 252 | rawindices = self.extra.get(b'filesremoved') |
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253 | 253 | if rawindices is None: |
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254 | 254 | return None |
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255 | 255 | return metadata.decodefileindices(self.files, rawindices) |
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256 | 256 | |
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257 | 257 | @property |
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258 | 258 | def p1copies(self): |
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259 | 259 | if self._cpsd: |
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260 | 260 | return self.changes.copied_from_p1 |
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261 | 261 | else: |
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262 | 262 | rawcopies = self.extra.get(b'p1copies') |
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263 | 263 | if rawcopies is None: |
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264 | 264 | return None |
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265 | 265 | return metadata.decodecopies(self.files, rawcopies) |
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266 | 266 | |
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267 | 267 | @property |
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268 | 268 | def p2copies(self): |
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269 | 269 | if self._cpsd: |
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270 | 270 | return self.changes.copied_from_p2 |
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271 | 271 | else: |
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272 | 272 | rawcopies = self.extra.get(b'p2copies') |
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273 | 273 | if rawcopies is None: |
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274 | 274 | return None |
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275 | 275 | return metadata.decodecopies(self.files, rawcopies) |
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276 | 276 | |
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277 | 277 | @property |
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278 | 278 | def description(self): |
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279 | 279 | return encoding.tolocal(self._text[self._offsets[3] + 2 :]) |
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280 | 280 | |
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281 | 281 | @property |
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282 | 282 | def branchinfo(self): |
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283 | 283 | extra = self.extra |
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284 | 284 | return encoding.tolocal(extra.get(b"branch")), b'close' in extra |
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285 | 285 | |
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286 | 286 | |
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287 | 287 | class changelog(revlog.revlog): |
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288 | 288 | def __init__(self, opener, trypending=False, concurrencychecker=None): |
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289 | 289 | """Load a changelog revlog using an opener. |
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290 | 290 | |
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291 | 291 | If ``trypending`` is true, we attempt to load the index from a |
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292 | 292 | ``00changelog.i.a`` file instead of the default ``00changelog.i``. |
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293 | 293 | The ``00changelog.i.a`` file contains index (and possibly inline |
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294 | 294 | revision) data for a transaction that hasn't been finalized yet. |
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295 | 295 | It exists in a separate file to facilitate readers (such as |
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296 | 296 | hooks processes) accessing data before a transaction is finalized. |
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297 | 297 | |
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298 | 298 | ``concurrencychecker`` will be passed to the revlog init function, see |
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299 | 299 | the documentation there. |
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300 | 300 | """ |
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301 | 301 | revlog.revlog.__init__( |
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302 | 302 | self, |
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303 | 303 | opener, |
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304 | 304 | target=(revlog_constants.KIND_CHANGELOG, None), |
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305 | 305 | radix=b'00changelog', |
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306 | 306 | checkambig=True, |
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307 | 307 | mmaplargeindex=True, |
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308 | 308 | persistentnodemap=opener.options.get(b'persistent-nodemap', False), |
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309 | 309 | concurrencychecker=concurrencychecker, |
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310 | 310 | trypending=trypending, |
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311 | 311 | may_inline=False, |
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312 | 312 | ) |
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313 | 313 | |
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314 | 314 | if self._initempty and (self._format_version == revlog.REVLOGV1): |
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315 | 315 | # changelogs don't benefit from generaldelta. |
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316 | 316 | |
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317 | 317 | self._format_flags &= ~revlog.FLAG_GENERALDELTA |
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318 | 318 | self.delta_config.general_delta = False |
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319 | 319 | |
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320 | 320 | # Delta chains for changelogs tend to be very small because entries |
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321 | 321 | # tend to be small and don't delta well with each. So disable delta |
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322 | 322 | # chains. |
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323 | 323 | self._storedeltachains = False |
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324 | 324 | |
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325 | 325 | self._v2_delayed = False |
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326 | 326 | self._filteredrevs = frozenset() |
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327 | 327 | self._filteredrevs_hashcache = {} |
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328 | 328 | self._copiesstorage = opener.options.get(b'copies-storage') |
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329 | 329 | |
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330 | def __contains__(self, rev): | |
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331 | return (0 <= rev < len(self)) and rev not in self._filteredrevs | |
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332 | ||
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330 | 333 | @property |
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331 | 334 | def filteredrevs(self): |
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332 | 335 | return self._filteredrevs |
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333 | 336 | |
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334 | 337 | @filteredrevs.setter |
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335 | 338 | def filteredrevs(self, val): |
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336 | 339 | # Ensure all updates go through this function |
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337 | 340 | assert isinstance(val, frozenset) |
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338 | 341 | self._filteredrevs = val |
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339 | 342 | self._filteredrevs_hashcache = {} |
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340 | 343 | |
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341 | 344 | def _write_docket(self, tr): |
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342 | 345 | if not self._v2_delayed: |
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343 | 346 | super(changelog, self)._write_docket(tr) |
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344 | 347 | |
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345 | 348 | def delayupdate(self, tr): |
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346 | 349 | """delay visibility of index updates to other readers""" |
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347 | 350 | assert not self._inner.is_open |
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348 | 351 | assert not self._may_inline |
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349 | 352 | # enforce that older changelog that are still inline are split at the |
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350 | 353 | # first opportunity. |
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351 | 354 | if self._inline: |
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352 | 355 | self._enforceinlinesize(tr) |
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353 | 356 | if self._docket is not None: |
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354 | 357 | self._v2_delayed = True |
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355 | 358 | else: |
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356 | 359 | new_index = self._inner.delay() |
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357 | 360 | if new_index is not None: |
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358 | 361 | self._indexfile = new_index |
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359 | 362 | tr.registertmp(new_index) |
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360 | 363 | tr.addpending(b'cl-%i' % id(self), self._writepending) |
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361 | 364 | tr.addfinalize(b'cl-%i' % id(self), self._finalize) |
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362 | 365 | |
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363 | 366 | def _finalize(self, tr): |
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364 | 367 | """finalize index updates""" |
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365 | 368 | assert not self._inner.is_open |
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366 | 369 | if self._docket is not None: |
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367 | 370 | self._docket.write(tr) |
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368 | 371 | self._v2_delayed = False |
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369 | 372 | else: |
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370 | 373 | new_index_file = self._inner.finalize_pending() |
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371 | 374 | self._indexfile = new_index_file |
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372 | 375 | if self._inline: |
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373 | 376 | msg = 'changelog should not be inline at that point' |
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374 | 377 | raise error.ProgrammingError(msg) |
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375 | 378 | |
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376 | 379 | def _writepending(self, tr): |
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377 | 380 | """create a file containing the unfinalized state for |
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378 | 381 | pretxnchangegroup""" |
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379 | 382 | assert not self._inner.is_open |
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380 | 383 | if self._docket: |
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381 | 384 | any_pending = self._docket.write(tr, pending=True) |
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382 | 385 | self._v2_delayed = False |
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383 | 386 | else: |
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384 | 387 | new_index, any_pending = self._inner.write_pending() |
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385 | 388 | if new_index is not None: |
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386 | 389 | self._indexfile = new_index |
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387 | 390 | tr.registertmp(new_index) |
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388 | 391 | return any_pending |
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389 | 392 | |
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390 | 393 | def _enforceinlinesize(self, tr): |
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391 | 394 | if not self.is_delaying: |
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392 | 395 | revlog.revlog._enforceinlinesize(self, tr) |
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393 | 396 | |
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394 | 397 | def read(self, nodeorrev): |
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395 | 398 | """Obtain data from a parsed changelog revision. |
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396 | 399 | |
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397 | 400 | Returns a 6-tuple of: |
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398 | 401 | |
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399 | 402 | - manifest node in binary |
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400 | 403 | - author/user as a localstr |
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401 | 404 | - date as a 2-tuple of (time, timezone) |
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402 | 405 | - list of files |
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403 | 406 | - commit message as a localstr |
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404 | 407 | - dict of extra metadata |
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405 | 408 | |
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406 | 409 | Unless you need to access all fields, consider calling |
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407 | 410 | ``changelogrevision`` instead, as it is faster for partial object |
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408 | 411 | access. |
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409 | 412 | """ |
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410 | 413 | d = self._revisiondata(nodeorrev) |
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411 | 414 | sidedata = self.sidedata(nodeorrev) |
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412 | 415 | copy_sd = self._copiesstorage == b'changeset-sidedata' |
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413 | 416 | c = changelogrevision(self, d, sidedata, copy_sd) |
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414 | 417 | return (c.manifest, c.user, c.date, c.files, c.description, c.extra) |
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415 | 418 | |
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416 | 419 | def changelogrevision(self, nodeorrev): |
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417 | 420 | """Obtain a ``changelogrevision`` for a node or revision.""" |
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418 | 421 | text = self._revisiondata(nodeorrev) |
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419 | 422 | sidedata = self.sidedata(nodeorrev) |
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420 | 423 | return changelogrevision( |
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421 | 424 | self, text, sidedata, self._copiesstorage == b'changeset-sidedata' |
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422 | 425 | ) |
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423 | 426 | |
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424 | 427 | def readfiles(self, nodeorrev): |
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425 | 428 | """ |
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426 | 429 | short version of read that only returns the files modified by the cset |
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427 | 430 | """ |
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428 | 431 | text = self.revision(nodeorrev) |
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429 | 432 | if not text: |
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430 | 433 | return [] |
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431 | 434 | last = text.index(b"\n\n") |
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432 | 435 | l = text[:last].split(b'\n') |
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433 | 436 | return l[3:] |
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434 | 437 | |
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435 | 438 | def add( |
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436 | 439 | self, |
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437 | 440 | manifest, |
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438 | 441 | files, |
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439 | 442 | desc, |
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440 | 443 | transaction, |
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441 | 444 | p1, |
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442 | 445 | p2, |
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443 | 446 | user, |
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444 | 447 | date=None, |
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445 | 448 | extra=None, |
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446 | 449 | ): |
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447 | 450 | # Convert to UTF-8 encoded bytestrings as the very first |
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448 | 451 | # thing: calling any method on a localstr object will turn it |
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449 | 452 | # into a str object and the cached UTF-8 string is thus lost. |
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450 | 453 | user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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451 | 454 | |
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452 | 455 | user = user.strip() |
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453 | 456 | # An empty username or a username with a "\n" will make the |
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454 | 457 | # revision text contain two "\n\n" sequences -> corrupt |
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455 | 458 | # repository since read cannot unpack the revision. |
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456 | 459 | if not user: |
|
457 | 460 | raise error.StorageError(_(b"empty username")) |
|
458 | 461 | if b"\n" in user: |
|
459 | 462 | raise error.StorageError( |
|
460 | 463 | _(b"username %r contains a newline") % pycompat.bytestr(user) |
|
461 | 464 | ) |
|
462 | 465 | |
|
463 | 466 | desc = stripdesc(desc) |
|
464 | 467 | |
|
465 | 468 | if date: |
|
466 | 469 | parseddate = b"%d %d" % dateutil.parsedate(date) |
|
467 | 470 | else: |
|
468 | 471 | parseddate = b"%d %d" % dateutil.makedate() |
|
469 | 472 | if extra: |
|
470 | 473 | branch = extra.get(b"branch") |
|
471 | 474 | if branch in (b"default", b""): |
|
472 | 475 | del extra[b"branch"] |
|
473 | 476 | elif branch in (b".", b"null", b"tip"): |
|
474 | 477 | raise error.StorageError( |
|
475 | 478 | _(b'the name \'%s\' is reserved') % branch |
|
476 | 479 | ) |
|
477 | 480 | sortedfiles = sorted(files.touched) |
|
478 | 481 | flags = 0 |
|
479 | 482 | sidedata = None |
|
480 | 483 | if self._copiesstorage == b'changeset-sidedata': |
|
481 | 484 | if files.has_copies_info: |
|
482 | 485 | flags |= flagutil.REVIDX_HASCOPIESINFO |
|
483 | 486 | sidedata = metadata.encode_files_sidedata(files) |
|
484 | 487 | |
|
485 | 488 | if extra: |
|
486 | 489 | extra = encodeextra(extra) |
|
487 | 490 | parseddate = b"%s %s" % (parseddate, extra) |
|
488 | 491 | l = [hex(manifest), user, parseddate] + sortedfiles + [b"", desc] |
|
489 | 492 | text = b"\n".join(l) |
|
490 | 493 | rev = self.addrevision( |
|
491 | 494 | text, transaction, len(self), p1, p2, sidedata=sidedata, flags=flags |
|
492 | 495 | ) |
|
493 | 496 | return self.node(rev) |
|
494 | 497 | |
|
495 | 498 | def branchinfo(self, rev): |
|
496 | 499 | """return the branch name and open/close state of a revision |
|
497 | 500 | |
|
498 | 501 | This function exists because creating a changectx object |
|
499 | 502 | just to access this is costly.""" |
|
500 | 503 | return self.changelogrevision(rev).branchinfo |
|
501 | 504 | |
|
502 | 505 | def _nodeduplicatecallback(self, transaction, rev): |
|
503 | 506 | # keep track of revisions that got "re-added", eg: unbunde of know rev. |
|
504 | 507 | # |
|
505 | 508 | # We track them in a list to preserve their order from the source bundle |
|
506 | 509 | duplicates = transaction.changes.setdefault(b'revduplicates', []) |
|
507 | 510 | duplicates.append(rev) |
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