Mercurial > hg
annotate mercurial/changelog.py @ 51858:2fd44b3dcc33 default tip
revlog: use the method to check if the revlog is being written to
This was probably fine, but it could become not fine at some point.
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Wed, 19 Jun 2024 18:06:50 +0200 |
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1095 | 1 # changelog.py - changelog class for mercurial |
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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 |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 |
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9 import typing |
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10 |
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11 from .i18n import _ |
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12 from .node import ( |
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13 bin, |
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14 hex, |
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15 ) |
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16 from .thirdparty import attr |
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17 |
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18 # Force pytype to use the non-vendored package |
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19 if typing.TYPE_CHECKING: |
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20 # noinspection PyPackageRequirements |
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21 import attr |
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22 |
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23 from . import ( |
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24 encoding, |
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25 error, |
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26 metadata, |
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27 pycompat, |
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28 revlog, |
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29 ) |
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30 from .utils import ( |
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31 dateutil, |
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32 stringutil, |
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33 ) |
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34 from .revlogutils import ( |
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35 constants as revlog_constants, |
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36 flagutil, |
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37 ) |
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38 |
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39 _defaultextra = {b'branch': b'default'} |
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40 |
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41 |
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42 def _string_escape(text): |
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43 """ |
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44 >>> from .pycompat import bytechr as chr |
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45 >>> d = {b'nl': chr(10), b'bs': chr(92), b'cr': chr(13), b'nul': chr(0)} |
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46 >>> s = b"ab%(nl)scd%(bs)s%(bs)sn%(nul)s12ab%(cr)scd%(bs)s%(nl)s" % d |
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47 >>> s |
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48 'ab\\ncd\\\\\\\\n\\x0012ab\\rcd\\\\\\n' |
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49 >>> res = _string_escape(s) |
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50 >>> s == _string_unescape(res) |
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51 True |
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52 """ |
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53 # subset of the string_escape codec |
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54 text = ( |
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55 text.replace(b'\\', b'\\\\') |
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56 .replace(b'\n', b'\\n') |
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57 .replace(b'\r', b'\\r') |
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58 ) |
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59 return text.replace(b'\0', b'\\0') |
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60 |
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61 |
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62 def _string_unescape(text): |
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63 if b'\\0' in text: |
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64 # fix up \0 without getting into trouble with \\0 |
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65 text = text.replace(b'\\\\', b'\\\\\n') |
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66 text = text.replace(b'\\0', b'\0') |
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67 text = text.replace(b'\n', b'') |
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68 return stringutil.unescapestr(text) |
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69 |
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70 |
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71 def decodeextra(text): |
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72 """ |
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73 >>> from .pycompat import bytechr as chr |
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74 >>> sorted(decodeextra(encodeextra({b'foo': b'bar', b'baz': chr(0) + b'2'}) |
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75 ... ).items()) |
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76 [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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77 >>> sorted(decodeextra(encodeextra({b'foo': b'bar', |
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78 ... b'baz': chr(92) + chr(0) + b'2'}) |
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79 ... ).items()) |
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80 [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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81 """ |
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82 extra = _defaultextra.copy() |
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83 for l in text.split(b'\0'): |
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84 if l: |
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85 k, v = _string_unescape(l).split(b':', 1) |
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86 extra[k] = v |
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87 return extra |
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88 |
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89 |
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90 def encodeextra(d): |
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91 # keys must be sorted to produce a deterministic changelog entry |
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92 items = [_string_escape(b'%s:%s' % (k, d[k])) for k in sorted(d)] |
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93 return b"\0".join(items) |
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94 |
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95 |
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96 def stripdesc(desc): |
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97 """strip trailing whitespace and leading and trailing empty lines""" |
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98 return b'\n'.join([l.rstrip() for l in desc.splitlines()]).strip(b'\n') |
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99 |
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100 |
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101 @attr.s |
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102 class _changelogrevision: |
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103 # Extensions might modify _defaultextra, so let the constructor below pass |
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104 # it in |
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105 extra = attr.ib() |
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106 manifest = attr.ib() |
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107 user = attr.ib(default=b'') |
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108 date = attr.ib(default=(0, 0)) |
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109 files = attr.ib(default=attr.Factory(list)) |
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110 filesadded = attr.ib(default=None) |
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111 filesremoved = attr.ib(default=None) |
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112 p1copies = attr.ib(default=None) |
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113 p2copies = attr.ib(default=None) |
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114 description = attr.ib(default=b'') |
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115 branchinfo = attr.ib(default=(_defaultextra[b'branch'], False)) |
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116 |
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117 |
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118 class changelogrevision: |
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119 """Holds results of a parsed changelog revision. |
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120 |
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121 Changelog revisions consist of multiple pieces of data, including |
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122 the manifest node, user, and date. This object exposes a view into |
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123 the parsed object. |
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124 """ |
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125 |
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126 __slots__ = ( |
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127 '_offsets', |
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128 '_text', |
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129 '_sidedata', |
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130 '_cpsd', |
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131 '_changes', |
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132 ) |
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133 |
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134 def __new__(cls, cl, text, sidedata, cpsd): |
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135 if not text: |
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136 return _changelogrevision(extra=_defaultextra, manifest=cl.nullid) |
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137 |
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138 self = super(changelogrevision, cls).__new__(cls) |
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139 # We could return here and implement the following as an __init__. |
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140 # But doing it here is equivalent and saves an extra function call. |
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141 |
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142 # format used: |
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143 # nodeid\n : manifest node in ascii |
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144 # user\n : user, no \n or \r allowed |
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145 # time tz extra\n : date (time is int or float, timezone is int) |
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146 # : extra is metadata, encoded and separated by '\0' |
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147 # : older versions ignore it |
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148 # files\n\n : files modified by the cset, no \n or \r allowed |
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149 # (.*) : comment (free text, ideally utf-8) |
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150 # |
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151 # changelog v0 doesn't use extra |
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152 |
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153 nl1 = text.index(b'\n') |
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154 nl2 = text.index(b'\n', nl1 + 1) |
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155 nl3 = text.index(b'\n', nl2 + 1) |
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156 |
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157 # The list of files may be empty. Which means nl3 is the first of the |
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158 # double newline that precedes the description. |
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159 if text[nl3 + 1 : nl3 + 2] == b'\n': |
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160 doublenl = nl3 |
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161 else: |
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162 doublenl = text.index(b'\n\n', nl3 + 1) |
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163 |
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164 self._offsets = (nl1, nl2, nl3, doublenl) |
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165 self._text = text |
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166 self._sidedata = sidedata |
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167 self._cpsd = cpsd |
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168 self._changes = None |
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169 |
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170 return self |
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171 |
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172 @property |
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173 def manifest(self): |
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174 return bin(self._text[0 : self._offsets[0]]) |
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175 |
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176 @property |
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177 def user(self): |
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178 off = self._offsets |
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179 return encoding.tolocal(self._text[off[0] + 1 : off[1]]) |
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180 |
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181 @property |
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182 def _rawdate(self): |
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183 off = self._offsets |
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184 dateextra = self._text[off[1] + 1 : off[2]] |
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185 return dateextra.split(b' ', 2)[0:2] |
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186 |
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187 @property |
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188 def _rawextra(self): |
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189 off = self._offsets |
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190 dateextra = self._text[off[1] + 1 : off[2]] |
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191 fields = dateextra.split(b' ', 2) |
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192 if len(fields) != 3: |
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193 return None |
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194 |
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195 return fields[2] |
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196 |
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197 @property |
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198 def date(self): |
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199 raw = self._rawdate |
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200 time = float(raw[0]) |
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201 # Various tools did silly things with the timezone. |
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202 try: |
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203 timezone = int(raw[1]) |
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204 except ValueError: |
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205 timezone = 0 |
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206 |
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207 return time, timezone |
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208 |
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209 @property |
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210 def extra(self): |
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211 raw = self._rawextra |
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212 if raw is None: |
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213 return _defaultextra |
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214 |
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215 return decodeextra(raw) |
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216 |
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217 @property |
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218 def changes(self): |
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219 if self._changes is not None: |
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220 return self._changes |
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221 if self._cpsd: |
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222 changes = metadata.decode_files_sidedata(self._sidedata) |
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223 else: |
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224 changes = metadata.ChangingFiles( |
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225 touched=self.files or (), |
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226 added=self.filesadded or (), |
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227 removed=self.filesremoved or (), |
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228 p1_copies=self.p1copies or {}, |
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229 p2_copies=self.p2copies or {}, |
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230 ) |
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231 self._changes = changes |
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232 return changes |
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233 |
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234 @property |
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235 def files(self): |
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236 if self._cpsd: |
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237 return sorted(self.changes.touched) |
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238 off = self._offsets |
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239 if off[2] == off[3]: |
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240 return [] |
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241 |
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242 return self._text[off[2] + 1 : off[3]].split(b'\n') |
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243 |
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244 @property |
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245 def filesadded(self): |
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246 if self._cpsd: |
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247 return self.changes.added |
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248 else: |
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249 rawindices = self.extra.get(b'filesadded') |
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250 if rawindices is None: |
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251 return None |
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252 return metadata.decodefileindices(self.files, rawindices) |
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253 |
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254 @property |
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255 def filesremoved(self): |
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256 if self._cpsd: |
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257 return self.changes.removed |
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258 else: |
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259 rawindices = self.extra.get(b'filesremoved') |
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260 if rawindices is None: |
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261 return None |
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262 return metadata.decodefileindices(self.files, rawindices) |
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263 |
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264 @property |
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265 def p1copies(self): |
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266 if self._cpsd: |
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267 return self.changes.copied_from_p1 |
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268 else: |
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269 rawcopies = self.extra.get(b'p1copies') |
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270 if rawcopies is None: |
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271 return None |
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272 return metadata.decodecopies(self.files, rawcopies) |
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273 |
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274 @property |
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275 def p2copies(self): |
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276 if self._cpsd: |
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277 return self.changes.copied_from_p2 |
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278 else: |
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279 rawcopies = self.extra.get(b'p2copies') |
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280 if rawcopies is None: |
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281 return None |
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282 return metadata.decodecopies(self.files, rawcopies) |
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283 |
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284 @property |
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285 def description(self): |
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286 return encoding.tolocal(self._text[self._offsets[3] + 2 :]) |
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287 |
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288 @property |
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289 def branchinfo(self): |
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290 extra = self.extra |
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291 return encoding.tolocal(extra.get(b"branch")), b'close' in extra |
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292 |
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293 |
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294 class changelog(revlog.revlog): |
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295 def __init__(self, opener, trypending=False, concurrencychecker=None): |
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296 """Load a changelog revlog using an opener. |
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297 |
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298 If ``trypending`` is true, we attempt to load the index from a |
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299 ``00changelog.i.a`` file instead of the default ``00changelog.i``. |
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300 The ``00changelog.i.a`` file contains index (and possibly inline |
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301 revision) data for a transaction that hasn't been finalized yet. |
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302 It exists in a separate file to facilitate readers (such as |
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|
303 hooks processes) accessing data before a transaction is finalized. |
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304 |
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305 ``concurrencychecker`` will be passed to the revlog init function, see |
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306 the documentation there. |
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307 """ |
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308 revlog.revlog.__init__( |
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309 self, |
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310 opener, |
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311 target=(revlog_constants.KIND_CHANGELOG, None), |
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312 radix=b'00changelog', |
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313 checkambig=True, |
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314 mmaplargeindex=True, |
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315 persistentnodemap=opener.options.get(b'persistent-nodemap', False), |
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316 concurrencychecker=concurrencychecker, |
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317 trypending=trypending, |
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318 may_inline=False, |
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319 ) |
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320 |
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321 if self._initempty and (self._format_version == revlog.REVLOGV1): |
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322 # changelogs don't benefit from generaldelta. |
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323 |
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324 self._format_flags &= ~revlog.FLAG_GENERALDELTA |
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325 self.delta_config.general_delta = False |
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326 |
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327 # Delta chains for changelogs tend to be very small because entries |
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328 # tend to be small and don't delta well with each. So disable delta |
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329 # chains. |
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330 self._storedeltachains = False |
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331 |
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332 self._v2_delayed = False |
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333 self._filteredrevs = frozenset() |
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334 self._filteredrevs_hashcache = {} |
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335 self._copiesstorage = opener.options.get(b'copies-storage') |
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336 |
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337 def __contains__(self, rev): |
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338 return (0 <= rev < len(self)) and rev not in self._filteredrevs |
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339 |
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340 @property |
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341 def filteredrevs(self): |
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342 return self._filteredrevs |
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343 |
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344 @filteredrevs.setter |
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345 def filteredrevs(self, val): |
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346 # Ensure all updates go through this function |
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347 assert isinstance(val, frozenset) |
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348 self._filteredrevs = val |
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349 self._filteredrevs_hashcache = {} |
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350 |
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351 def _write_docket(self, tr): |
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352 if not self._v2_delayed: |
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353 super(changelog, self)._write_docket(tr) |
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354 |
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355 def delayupdate(self, tr): |
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356 """delay visibility of index updates to other readers""" |
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357 assert not self._inner.is_open |
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358 assert not self._may_inline |
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359 # enforce that older changelog that are still inline are split at the |
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360 # first opportunity. |
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361 if self._inline: |
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362 self._enforceinlinesize(tr) |
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363 if self._docket is not None: |
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364 self._v2_delayed = True |
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365 else: |
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366 new_index = self._inner.delay() |
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367 if new_index is not None: |
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368 self._indexfile = new_index |
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369 tr.registertmp(new_index) |
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370 # use "000" as prefix to make sure we run before the spliting of legacy |
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371 # inline changelog.. |
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372 tr.addpending(b'000-cl-%i' % id(self), self._writepending) |
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373 tr.addfinalize(b'000-cl-%i' % id(self), self._finalize) |
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374 |
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375 def _finalize(self, tr): |
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376 """finalize index updates""" |
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377 assert not self._inner.is_open |
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378 if self._docket is not None: |
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379 self._docket.write(tr) |
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380 self._v2_delayed = False |
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381 else: |
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382 new_index_file = self._inner.finalize_pending() |
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383 self._indexfile = new_index_file |
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384 if self._inline: |
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385 msg = 'changelog should not be inline at that point' |
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386 raise error.ProgrammingError(msg) |
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387 |
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388 def _writepending(self, tr): |
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389 """create a file containing the unfinalized state for |
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390 pretxnchangegroup""" |
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391 assert not self._inner.is_open |
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392 if self._docket: |
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393 any_pending = self._docket.write(tr, pending=True) |
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394 self._v2_delayed = False |
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395 else: |
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396 new_index, any_pending = self._inner.write_pending() |
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397 if new_index is not None: |
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398 self._indexfile = new_index |
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399 tr.registertmp(new_index) |
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400 return any_pending |
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401 |
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402 def _enforceinlinesize(self, tr): |
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403 if not self.is_delaying: |
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404 revlog.revlog._enforceinlinesize(self, tr) |
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405 |
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406 def read(self, nodeorrev): |
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407 """Obtain data from a parsed changelog revision. |
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408 |
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409 Returns a 6-tuple of: |
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410 |
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411 - manifest node in binary |
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412 - author/user as a localstr |
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413 - date as a 2-tuple of (time, timezone) |
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414 - list of files |
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415 - commit message as a localstr |
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416 - dict of extra metadata |
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417 |
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418 Unless you need to access all fields, consider calling |
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419 ``changelogrevision`` instead, as it is faster for partial object |
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420 access. |
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421 """ |
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422 d = self._revisiondata(nodeorrev) |
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423 sidedata = self.sidedata(nodeorrev) |
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424 copy_sd = self._copiesstorage == b'changeset-sidedata' |
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425 c = changelogrevision(self, d, sidedata, copy_sd) |
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426 return (c.manifest, c.user, c.date, c.files, c.description, c.extra) |
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427 |
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428 def changelogrevision(self, nodeorrev): |
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429 """Obtain a ``changelogrevision`` for a node or revision.""" |
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430 text = self._revisiondata(nodeorrev) |
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431 sidedata = self.sidedata(nodeorrev) |
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432 return changelogrevision( |
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433 self, text, sidedata, self._copiesstorage == b'changeset-sidedata' |
43230
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434 ) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
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435 |
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436 def readfiles(self, nodeorrev): |
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437 """ |
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438 short version of read that only returns the files modified by the cset |
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439 """ |
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440 text = self.revision(nodeorrev) |
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441 if not text: |
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442 return [] |
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443 last = text.index(b"\n\n") |
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444 l = text[:last].split(b'\n') |
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445 return l[3:] |
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446 |
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447 def add( |
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448 self, |
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449 manifest, |
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450 files, |
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451 desc, |
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452 transaction, |
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453 p1, |
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454 p2, |
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455 user, |
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456 date=None, |
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457 extra=None, |
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458 ): |
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459 # Convert to UTF-8 encoded bytestrings as the very first |
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460 # thing: calling any method on a localstr object will turn it |
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461 # into a str object and the cached UTF-8 string is thus lost. |
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462 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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463 |
7035
9d023ef7b467
forbid username with '\n' at the changelog level
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464 user = user.strip() |
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465 # An empty username or a username with a "\n" will make the |
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466 # revision text contain two "\n\n" sequences -> corrupt |
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467 # repository since read cannot unpack the revision. |
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468 if not user: |
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469 raise error.StorageError(_(b"empty username")) |
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470 if b"\n" in user: |
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471 raise error.StorageError( |
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472 _(b"username %r contains a newline") % pycompat.bytestr(user) |
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473 ) |
8499
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commit: move description trimming into changelog
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474 |
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475 desc = stripdesc(desc) |
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476 |
1195
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Validate user input of dates when adding a changelog entry.
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477 if date: |
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478 parseddate = b"%d %d" % dateutil.parsedate(date) |
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479 else: |
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480 parseddate = b"%d %d" % dateutil.makedate() |
10417
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branch: avoid using reserved tag names
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481 if extra: |
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482 branch = extra.get(b"branch") |
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483 if branch in (b"default", b""): |
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484 del extra[b"branch"] |
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485 elif branch in (b".", b"null", b"tip"): |
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486 raise error.StorageError( |
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487 _(b'the name \'%s\' is reserved') % branch |
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488 ) |
45324
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commitctx: directly pass a ChangingFiles object to changelog.add
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45249
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489 sortedfiles = sorted(files.touched) |
45671
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copies: add a HASCOPIESINFO flag to highlight rev with useful data
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490 flags = 0 |
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491 sidedata = None |
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commitctx: extract copy information encoding into extra into commit.py
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492 if self._copiesstorage == b'changeset-sidedata': |
45728
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changing-files: add a shorthand property to check for copy relevant info
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493 if files.has_copies_info: |
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494 flags |= flagutil.REVIDX_HASCOPIESINFO |
45569
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sidedata: rename `encode_copies_sidedata` to `encode_files_sidedata`
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45515
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|
495 sidedata = metadata.encode_files_sidedata(files) |
42141
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copies: add config option for writing copy metadata to file and/or changset
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parents:
42116
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changeset
|
496 |
3233
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[extendedchangelog] add extra metadata in the changelog entry
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3232
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|
497 if extra: |
8443
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changelog: turn {de,en}code_extra methods into functions
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498 extra = encodeextra(extra) |
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499 parseddate = b"%s %s" % (parseddate, extra) |
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500 l = [hex(manifest), user, parseddate] + sortedfiles + [b"", desc] |
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|
501 text = b"\n".join(l) |
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parents:
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|
502 rev = self.addrevision( |
45672
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changeset
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503 text, transaction, len(self), p1, p2, sidedata=sidedata, flags=flags |
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|
504 ) |
46508
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|
505 return self.node(rev) |
18306
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parents:
18231
diff
changeset
|
506 |
20185
7d4219512823
branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents:
19899
diff
changeset
|
507 def branchinfo(self, rev): |
7d4219512823
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19899
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changeset
|
508 """return the branch name and open/close state of a revision |
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parents:
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diff
changeset
|
509 |
18308
4e27b06a0fd9
changelog: please check-code and remove tabs
Mads Kiilerich <mads@kiilerich.com>
parents:
18306
diff
changeset
|
510 This function exists because creating a changectx object |
4e27b06a0fd9
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18306
diff
changeset
|
511 just to access this is costly.""" |
46370
cad17d50736c
changelog: move branchinfo to changelogrevision
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parents:
46197
diff
changeset
|
512 return self.changelogrevision(rev).branchinfo |
39887
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changelog: keep track of duplicated node in the transaction adding them
Boris Feld <boris.feld@octobus.net>
parents:
39777
diff
changeset
|
513 |
46509
7a93b7b3dc2d
revlog: change addgroup callbacks to take revision numbers
Joerg Sonnenberger <joerg@bec.de>
parents:
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diff
changeset
|
514 def _nodeduplicatecallback(self, transaction, rev): |
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|
515 # keep track of revisions that got "re-added", eg: unbunde of know rev. |
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|
516 # |
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|
517 # We track them in a list to preserve their order from the source bundle |
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|
518 duplicates = transaction.changes.setdefault(b'revduplicates', []) |
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changeset
|
519 duplicates.append(rev) |