Mercurial > hg
annotate mercurial/changelog.py @ 47532:ccbabaee5c36
dirstate-entry: add a `need_delay` method
This abstract the internal processing need for entry that would have an
ambiguous mtime (If I understand things correctly).
Differential Revision: https://phab.mercurial-scm.org/D10974
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sun, 04 Jul 2021 02:13:53 +0200 |
parents | cac0e0621ceb |
children | 6000f5b25c9b |
rev | line source |
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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 from __future__ import absolute_import |
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9 |
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10 from .i18n import _ |
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11 from .node import ( |
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12 bin, |
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13 hex, |
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14 ) |
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15 from .thirdparty import attr |
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16 |
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17 from . import ( |
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18 encoding, |
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19 error, |
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20 metadata, |
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21 pycompat, |
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22 revlog, |
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23 ) |
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24 from .utils import ( |
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25 dateutil, |
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26 stringutil, |
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27 ) |
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28 from .revlogutils import ( |
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29 constants as revlog_constants, |
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30 flagutil, |
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31 ) |
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32 |
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33 _defaultextra = {b'branch': b'default'} |
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34 |
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35 |
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36 def _string_escape(text): |
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37 """ |
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38 >>> from .pycompat import bytechr as chr |
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39 >>> d = {b'nl': chr(10), b'bs': chr(92), b'cr': chr(13), b'nul': chr(0)} |
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40 >>> s = b"ab%(nl)scd%(bs)s%(bs)sn%(nul)s12ab%(cr)scd%(bs)s%(nl)s" % d |
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41 >>> s |
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42 'ab\\ncd\\\\\\\\n\\x0012ab\\rcd\\\\\\n' |
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43 >>> res = _string_escape(s) |
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44 >>> s == _string_unescape(res) |
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45 True |
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46 """ |
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47 # subset of the string_escape codec |
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48 text = ( |
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49 text.replace(b'\\', b'\\\\') |
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50 .replace(b'\n', b'\\n') |
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51 .replace(b'\r', b'\\r') |
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52 ) |
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53 return text.replace(b'\0', b'\\0') |
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54 |
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55 |
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56 def _string_unescape(text): |
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57 if b'\\0' in text: |
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58 # fix up \0 without getting into trouble with \\0 |
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59 text = text.replace(b'\\\\', b'\\\\\n') |
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60 text = text.replace(b'\\0', b'\0') |
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61 text = text.replace(b'\n', b'') |
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62 return stringutil.unescapestr(text) |
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63 |
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64 |
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65 def decodeextra(text): |
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66 """ |
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67 >>> from .pycompat import bytechr as chr |
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68 >>> sorted(decodeextra(encodeextra({b'foo': b'bar', b'baz': chr(0) + b'2'}) |
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69 ... ).items()) |
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70 [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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71 >>> sorted(decodeextra(encodeextra({b'foo': b'bar', |
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72 ... b'baz': chr(92) + chr(0) + b'2'}) |
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73 ... ).items()) |
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74 [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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75 """ |
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76 extra = _defaultextra.copy() |
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77 for l in text.split(b'\0'): |
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78 if l: |
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79 k, v = _string_unescape(l).split(b':', 1) |
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80 extra[k] = v |
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81 return extra |
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82 |
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83 |
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84 def encodeextra(d): |
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85 # keys must be sorted to produce a deterministic changelog entry |
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86 items = [_string_escape(b'%s:%s' % (k, d[k])) for k in sorted(d)] |
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87 return b"\0".join(items) |
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88 |
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89 |
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90 def stripdesc(desc): |
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91 """strip trailing whitespace and leading and trailing empty lines""" |
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92 return b'\n'.join([l.rstrip() for l in desc.splitlines()]).strip(b'\n') |
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93 |
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94 |
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95 class appender(object): |
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96 """the changelog index must be updated last on disk, so we use this class |
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97 to delay writes to it""" |
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98 |
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99 def __init__(self, vfs, name, mode, buf): |
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100 self.data = buf |
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101 fp = vfs(name, mode) |
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102 self.fp = fp |
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103 self.offset = fp.tell() |
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104 self.size = vfs.fstat(fp).st_size |
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105 self._end = self.size |
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106 |
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107 def end(self): |
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108 return self._end |
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109 |
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110 def tell(self): |
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111 return self.offset |
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112 |
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113 def flush(self): |
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114 pass |
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115 |
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116 @property |
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117 def closed(self): |
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118 return self.fp.closed |
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119 |
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120 def close(self): |
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121 self.fp.close() |
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122 |
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123 def seek(self, offset, whence=0): |
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124 '''virtual file offset spans real file and data''' |
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125 if whence == 0: |
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126 self.offset = offset |
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127 elif whence == 1: |
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128 self.offset += offset |
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129 elif whence == 2: |
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130 self.offset = self.end() + offset |
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131 if self.offset < self.size: |
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132 self.fp.seek(self.offset) |
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133 |
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134 def read(self, count=-1): |
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135 '''only trick here is reads that span real file and data''' |
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136 ret = b"" |
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137 if self.offset < self.size: |
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138 s = self.fp.read(count) |
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139 ret = s |
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140 self.offset += len(s) |
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141 if count > 0: |
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142 count -= len(s) |
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143 if count != 0: |
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144 doff = self.offset - self.size |
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145 self.data.insert(0, b"".join(self.data)) |
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146 del self.data[1:] |
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147 s = self.data[0][doff : doff + count] |
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148 self.offset += len(s) |
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149 ret += s |
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150 return ret |
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151 |
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152 def write(self, s): |
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153 self.data.append(bytes(s)) |
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154 self.offset += len(s) |
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155 self._end += len(s) |
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156 |
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157 def __enter__(self): |
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158 self.fp.__enter__() |
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159 return self |
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160 |
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161 def __exit__(self, *args): |
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162 return self.fp.__exit__(*args) |
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163 |
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164 |
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165 class _divertopener(object): |
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166 def __init__(self, opener, target): |
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167 self._opener = opener |
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168 self._target = target |
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169 |
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170 def __call__(self, name, mode=b'r', checkambig=False, **kwargs): |
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171 if name != self._target: |
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172 return self._opener(name, mode, **kwargs) |
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173 return self._opener(name + b".a", mode, **kwargs) |
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174 |
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175 def __getattr__(self, attr): |
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176 return getattr(self._opener, attr) |
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177 |
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178 |
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179 def _delayopener(opener, target, buf): |
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180 """build an opener that stores chunks in 'buf' instead of 'target'""" |
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181 |
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182 def _delay(name, mode=b'r', checkambig=False, **kwargs): |
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183 if name != target: |
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184 return opener(name, mode, **kwargs) |
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185 assert not kwargs |
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186 return appender(opener, name, mode, buf) |
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187 |
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188 return _delay |
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189 |
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190 |
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191 @attr.s |
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192 class _changelogrevision(object): |
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193 # Extensions might modify _defaultextra, so let the constructor below pass |
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194 # it in |
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195 extra = attr.ib() |
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196 manifest = attr.ib() |
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197 user = attr.ib(default=b'') |
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198 date = attr.ib(default=(0, 0)) |
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199 files = attr.ib(default=attr.Factory(list)) |
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200 filesadded = attr.ib(default=None) |
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201 filesremoved = attr.ib(default=None) |
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202 p1copies = attr.ib(default=None) |
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203 p2copies = attr.ib(default=None) |
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204 description = attr.ib(default=b'') |
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205 branchinfo = attr.ib(default=(_defaultextra[b'branch'], False)) |
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206 |
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207 |
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208 class changelogrevision(object): |
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209 """Holds results of a parsed changelog revision. |
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210 |
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211 Changelog revisions consist of multiple pieces of data, including |
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212 the manifest node, user, and date. This object exposes a view into |
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213 the parsed object. |
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214 """ |
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215 |
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216 __slots__ = ( |
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217 '_offsets', |
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218 '_text', |
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219 '_sidedata', |
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220 '_cpsd', |
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221 '_changes', |
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222 ) |
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223 |
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224 def __new__(cls, cl, text, sidedata, cpsd): |
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225 if not text: |
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226 return _changelogrevision(extra=_defaultextra, manifest=cl.nullid) |
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227 |
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228 self = super(changelogrevision, cls).__new__(cls) |
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229 # We could return here and implement the following as an __init__. |
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230 # But doing it here is equivalent and saves an extra function call. |
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231 |
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232 # format used: |
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233 # nodeid\n : manifest node in ascii |
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234 # user\n : user, no \n or \r allowed |
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235 # time tz extra\n : date (time is int or float, timezone is int) |
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236 # : extra is metadata, encoded and separated by '\0' |
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237 # : older versions ignore it |
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238 # files\n\n : files modified by the cset, no \n or \r allowed |
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239 # (.*) : comment (free text, ideally utf-8) |
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240 # |
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241 # changelog v0 doesn't use extra |
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242 |
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243 nl1 = text.index(b'\n') |
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244 nl2 = text.index(b'\n', nl1 + 1) |
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245 nl3 = text.index(b'\n', nl2 + 1) |
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246 |
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247 # The list of files may be empty. Which means nl3 is the first of the |
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248 # double newline that precedes the description. |
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249 if text[nl3 + 1 : nl3 + 2] == b'\n': |
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250 doublenl = nl3 |
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251 else: |
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252 doublenl = text.index(b'\n\n', nl3 + 1) |
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253 |
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254 self._offsets = (nl1, nl2, nl3, doublenl) |
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255 self._text = text |
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256 self._sidedata = sidedata |
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257 self._cpsd = cpsd |
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258 self._changes = None |
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259 |
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260 return self |
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261 |
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262 @property |
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263 def manifest(self): |
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264 return bin(self._text[0 : self._offsets[0]]) |
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265 |
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266 @property |
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267 def user(self): |
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268 off = self._offsets |
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269 return encoding.tolocal(self._text[off[0] + 1 : off[1]]) |
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270 |
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271 @property |
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272 def _rawdate(self): |
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273 off = self._offsets |
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274 dateextra = self._text[off[1] + 1 : off[2]] |
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275 return dateextra.split(b' ', 2)[0:2] |
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276 |
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277 @property |
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278 def _rawextra(self): |
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279 off = self._offsets |
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280 dateextra = self._text[off[1] + 1 : off[2]] |
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281 fields = dateextra.split(b' ', 2) |
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282 if len(fields) != 3: |
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283 return None |
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284 |
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285 return fields[2] |
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286 |
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287 @property |
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288 def date(self): |
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289 raw = self._rawdate |
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290 time = float(raw[0]) |
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291 # Various tools did silly things with the timezone. |
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292 try: |
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293 timezone = int(raw[1]) |
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294 except ValueError: |
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295 timezone = 0 |
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296 |
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297 return time, timezone |
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298 |
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299 @property |
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300 def extra(self): |
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301 raw = self._rawextra |
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302 if raw is None: |
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303 return _defaultextra |
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304 |
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305 return decodeextra(raw) |
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306 |
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307 @property |
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308 def changes(self): |
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309 if self._changes is not None: |
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310 return self._changes |
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311 if self._cpsd: |
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312 changes = metadata.decode_files_sidedata(self._sidedata) |
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313 else: |
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314 changes = metadata.ChangingFiles( |
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315 touched=self.files or (), |
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316 added=self.filesadded or (), |
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317 removed=self.filesremoved or (), |
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318 p1_copies=self.p1copies or {}, |
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319 p2_copies=self.p2copies or {}, |
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320 ) |
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321 self._changes = changes |
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322 return changes |
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323 |
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324 @property |
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325 def files(self): |
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326 if self._cpsd: |
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327 return sorted(self.changes.touched) |
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328 off = self._offsets |
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329 if off[2] == off[3]: |
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330 return [] |
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331 |
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332 return self._text[off[2] + 1 : off[3]].split(b'\n') |
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333 |
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334 @property |
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335 def filesadded(self): |
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336 if self._cpsd: |
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337 return self.changes.added |
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338 else: |
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339 rawindices = self.extra.get(b'filesadded') |
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340 if rawindices is None: |
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341 return None |
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342 return metadata.decodefileindices(self.files, rawindices) |
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343 |
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344 @property |
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345 def filesremoved(self): |
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346 if self._cpsd: |
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347 return self.changes.removed |
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348 else: |
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349 rawindices = self.extra.get(b'filesremoved') |
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350 if rawindices is None: |
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351 return None |
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352 return metadata.decodefileindices(self.files, rawindices) |
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353 |
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354 @property |
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355 def p1copies(self): |
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356 if self._cpsd: |
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357 return self.changes.copied_from_p1 |
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358 else: |
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359 rawcopies = self.extra.get(b'p1copies') |
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360 if rawcopies is None: |
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361 return None |
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362 return metadata.decodecopies(self.files, rawcopies) |
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363 |
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364 @property |
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365 def p2copies(self): |
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366 if self._cpsd: |
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367 return self.changes.copied_from_p2 |
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368 else: |
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369 rawcopies = self.extra.get(b'p2copies') |
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370 if rawcopies is None: |
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371 return None |
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372 return metadata.decodecopies(self.files, rawcopies) |
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373 |
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374 @property |
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375 def description(self): |
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376 return encoding.tolocal(self._text[self._offsets[3] + 2 :]) |
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377 |
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378 @property |
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379 def branchinfo(self): |
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380 extra = self.extra |
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381 return encoding.tolocal(extra.get(b"branch")), b'close' in extra |
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382 |
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383 |
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|
384 class changelog(revlog.revlog): |
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385 def __init__(self, opener, trypending=False, concurrencychecker=None): |
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386 """Load a changelog revlog using an opener. |
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387 |
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388 If ``trypending`` is true, we attempt to load the index from a |
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389 ``00changelog.i.a`` file instead of the default ``00changelog.i``. |
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390 The ``00changelog.i.a`` file contains index (and possibly inline |
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391 revision) data for a transaction that hasn't been finalized yet. |
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392 It exists in a separate file to facilitate readers (such as |
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393 hooks processes) accessing data before a transaction is finalized. |
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394 |
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395 ``concurrencychecker`` will be passed to the revlog init function, see |
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396 the documentation there. |
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397 """ |
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398 revlog.revlog.__init__( |
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399 self, |
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400 opener, |
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|
401 target=(revlog_constants.KIND_CHANGELOG, None), |
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402 radix=b'00changelog', |
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403 checkambig=True, |
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404 mmaplargeindex=True, |
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|
405 persistentnodemap=opener.options.get(b'persistent-nodemap', False), |
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406 concurrencychecker=concurrencychecker, |
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407 trypending=trypending, |
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408 ) |
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409 |
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|
410 if self._initempty and (self._format_version == revlog.REVLOGV1): |
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|
411 # changelogs don't benefit from generaldelta. |
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412 |
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|
413 self._format_flags &= ~revlog.FLAG_GENERALDELTA |
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|
414 self._generaldelta = False |
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415 |
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416 # Delta chains for changelogs tend to be very small because entries |
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417 # tend to be small and don't delta well with each. So disable delta |
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418 # chains. |
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419 self._storedeltachains = False |
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420 |
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|
421 self._realopener = opener |
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|
422 self._delayed = False |
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423 self._delaybuf = None |
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|
424 self._divert = False |
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425 self._filteredrevs = frozenset() |
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|
426 self._filteredrevs_hashcache = {} |
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|
427 self._copiesstorage = opener.options.get(b'copies-storage') |
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428 |
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|
429 @property |
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|
430 def filteredrevs(self): |
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431 return self._filteredrevs |
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432 |
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|
433 @filteredrevs.setter |
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434 def filteredrevs(self, val): |
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435 # Ensure all updates go through this function |
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436 assert isinstance(val, frozenset) |
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437 self._filteredrevs = val |
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438 self._filteredrevs_hashcache = {} |
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439 |
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440 def _write_docket(self, tr): |
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441 if not self._delayed: |
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442 super(changelog, self)._write_docket(tr) |
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443 |
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444 def delayupdate(self, tr): |
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|
445 """delay visibility of index updates to other readers""" |
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|
446 if self._docket is None and not self._delayed: |
23201
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
447 if len(self) == 0: |
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
448 self._divert = True |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
449 if self._realopener.exists(self._indexfile + b'.a'): |
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
450 self._realopener.unlink(self._indexfile + b'.a') |
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
451 self.opener = _divertopener(self._realopener, self._indexfile) |
23201
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
452 else: |
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
453 self._delaybuf = [] |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
43027
diff
changeset
|
454 self.opener = _delayopener( |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
455 self._realopener, self._indexfile, self._delaybuf |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
43027
diff
changeset
|
456 ) |
47425
e0a314bcbc9d
revlog: Extract low-level random-access file read caching logic
Simon Sapin <simon.sapin@octobus.net>
parents:
47385
diff
changeset
|
457 self._segmentfile.opener = self.opener |
47426
cac0e0621ceb
revlog: use file read caching for sidedata
Simon Sapin <simon.sapin@octobus.net>
parents:
47425
diff
changeset
|
458 self._segmentfile_sidedata.opener = self.opener |
8644
c2ef478b2efa
changelog: make delayopener less intrusive
Matt Mackall <mpm@selenic.com>
parents:
8499
diff
changeset
|
459 self._delayed = True |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
460 tr.addpending(b'cl-%i' % id(self), self._writepending) |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
461 tr.addfinalize(b'cl-%i' % id(self), self._finalize) |
4261
cd7b36b7869c
restructure changelog file appending
Matt Mackall <mpm@selenic.com>
parents:
4258
diff
changeset
|
462 |
23205
2d54aa5397cd
changelog: rely on transaction for finalization
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23203
diff
changeset
|
463 def _finalize(self, tr): |
43787
be8552f25cab
cleanup: fix docstring formatting
Matt Harbison <matt_harbison@yahoo.com>
parents:
43506
diff
changeset
|
464 """finalize index updates""" |
8644
c2ef478b2efa
changelog: make delayopener less intrusive
Matt Mackall <mpm@selenic.com>
parents:
8499
diff
changeset
|
465 self._delayed = False |
9165
07f9b2f4a9aa
changelog: swap opener to switch delay modes
Matt Mackall <mpm@selenic.com>
parents:
9164
diff
changeset
|
466 self.opener = self._realopener |
47425
e0a314bcbc9d
revlog: Extract low-level random-access file read caching logic
Simon Sapin <simon.sapin@octobus.net>
parents:
47385
diff
changeset
|
467 self._segmentfile.opener = self.opener |
47426
cac0e0621ceb
revlog: use file read caching for sidedata
Simon Sapin <simon.sapin@octobus.net>
parents:
47425
diff
changeset
|
468 self._segmentfile_sidedata.opener = self.opener |
4269
73c918c71300
changelog: optimize delayed updates for clone vs pull
Matt Mackall <mpm@selenic.com>
parents:
4261
diff
changeset
|
469 # move redirected index data back into place |
47239
682f09857d69
revlogv2: delay the update of the changelog docket to transaction end
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47234
diff
changeset
|
470 if self._docket is not None: |
682f09857d69
revlogv2: delay the update of the changelog docket to transaction end
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47234
diff
changeset
|
471 self._write_docket(tr) |
682f09857d69
revlogv2: delay the update of the changelog docket to transaction end
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47234
diff
changeset
|
472 elif self._divert: |
23201
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
473 assert not self._delaybuf |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
474 tmpname = self._indexfile + b".a" |
19898
3f92e749d381
changelog: use "vfs.rename()" instead of "util.rename()"
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
18587
diff
changeset
|
475 nfile = self.opener.open(tmpname) |
14207
c1cca38818b9
changelog: fixes leaked file handle
Zachary Gramana <zgramana@pottsconsultinggroup.com>
parents:
14004
diff
changeset
|
476 nfile.close() |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
477 self.opener.rename(tmpname, self._indexfile, checkambig=True) |
4269
73c918c71300
changelog: optimize delayed updates for clone vs pull
Matt Mackall <mpm@selenic.com>
parents:
4261
diff
changeset
|
478 elif self._delaybuf: |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
479 fp = self.opener(self._indexfile, b'a', checkambig=True) |
43077
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formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
480 fp.write(b"".join(self._delaybuf)) |
4261
cd7b36b7869c
restructure changelog file appending
Matt Mackall <mpm@selenic.com>
parents:
4258
diff
changeset
|
481 fp.close() |
23201
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
482 self._delaybuf = None |
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
483 self._divert = False |
4269
73c918c71300
changelog: optimize delayed updates for clone vs pull
Matt Mackall <mpm@selenic.com>
parents:
4261
diff
changeset
|
484 # split when we're done |
35974
9ba1d0c724e2
revlog: rename 'self.checkinlinesize' into '_enforceinlinesize'
Boris Feld <boris.feld@octobus.net>
parents:
35963
diff
changeset
|
485 self._enforceinlinesize(tr) |
4261
cd7b36b7869c
restructure changelog file appending
Matt Mackall <mpm@selenic.com>
parents:
4258
diff
changeset
|
486 |
23280
b01c491af0cf
transaction: pass the transaction to 'pending' callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23205
diff
changeset
|
487 def _writepending(self, tr): |
43787
be8552f25cab
cleanup: fix docstring formatting
Matt Harbison <matt_harbison@yahoo.com>
parents:
43506
diff
changeset
|
488 """create a file containing the unfinalized state for |
be8552f25cab
cleanup: fix docstring formatting
Matt Harbison <matt_harbison@yahoo.com>
parents:
43506
diff
changeset
|
489 pretxnchangegroup""" |
47241
2219853a1503
revlogv2: track pending write in the docket and expose it to hooks
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47240
diff
changeset
|
490 if self._docket: |
2219853a1503
revlogv2: track pending write in the docket and expose it to hooks
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47240
diff
changeset
|
491 return self._docket.write(tr, pending=True) |
7787
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
492 if self._delaybuf: |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
493 # make a temporary copy of the index |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
494 fp1 = self._realopener(self._indexfile) |
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
495 pendingfilename = self._indexfile + b".a" |
23292
e44399c494ab
changelog: register changelog.i.a as a temporary file
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23281
diff
changeset
|
496 # register as a temp file to ensure cleanup on failure |
e44399c494ab
changelog: register changelog.i.a as a temporary file
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23281
diff
changeset
|
497 tr.registertmp(pendingfilename) |
e44399c494ab
changelog: register changelog.i.a as a temporary file
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23281
diff
changeset
|
498 # write existing data |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
499 fp2 = self._realopener(pendingfilename, b"w") |
7787
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
500 fp2.write(fp1.read()) |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
501 # add pending data |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
502 fp2.write(b"".join(self._delaybuf)) |
7787
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
503 fp2.close() |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
504 # switch modes so finalize can simply rename |
23201
7e97bf6ee2d6
changelog: rework the delayupdate mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23088
diff
changeset
|
505 self._delaybuf = None |
9164
b0d995b6b0a6
changelog: factor out _delayname
Matt Mackall <mpm@selenic.com>
parents:
9163
diff
changeset
|
506 self._divert = True |
47148
a07d5cb03a85
revlog: rename `indexfile` to `_indexfile`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47145
diff
changeset
|
507 self.opener = _divertopener(self._realopener, self._indexfile) |
47425
e0a314bcbc9d
revlog: Extract low-level random-access file read caching logic
Simon Sapin <simon.sapin@octobus.net>
parents:
47385
diff
changeset
|
508 self._segmentfile.opener = self.opener |
47426
cac0e0621ceb
revlog: use file read caching for sidedata
Simon Sapin <simon.sapin@octobus.net>
parents:
47425
diff
changeset
|
509 self._segmentfile_sidedata.opener = self.opener |
7787
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
510 |
9164
b0d995b6b0a6
changelog: factor out _delayname
Matt Mackall <mpm@selenic.com>
parents:
9163
diff
changeset
|
511 if self._divert: |
7787
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
512 return True |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
513 |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
514 return False |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
Matt Mackall <mpm@selenic.com>
parents:
7634
diff
changeset
|
515 |
47214
906a7bcaac86
revlog: introduce a mandatory `_writing` context to update revlog content
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47150
diff
changeset
|
516 def _enforceinlinesize(self, tr): |
9165
07f9b2f4a9aa
changelog: swap opener to switch delay modes
Matt Mackall <mpm@selenic.com>
parents:
9164
diff
changeset
|
517 if not self._delayed: |
47214
906a7bcaac86
revlog: introduce a mandatory `_writing` context to update revlog content
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47150
diff
changeset
|
518 revlog.revlog._enforceinlinesize(self, tr) |
4261
cd7b36b7869c
restructure changelog file appending
Matt Mackall <mpm@selenic.com>
parents:
4258
diff
changeset
|
519 |
46631
230f73019e49
changelog: rename parameters to reflect semantics
Joerg Sonnenberger <joerg@bec.de>
parents:
46607
diff
changeset
|
520 def read(self, nodeorrev): |
28487
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
521 """Obtain data from a parsed changelog revision. |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
522 |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
523 Returns a 6-tuple of: |
3233
2f35961854fb
[extendedchangelog] add extra metadata in the changelog entry
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3232
diff
changeset
|
524 |
28487
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
525 - manifest node in binary |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
526 - author/user as a localstr |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
527 - date as a 2-tuple of (time, timezone) |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
528 - list of files |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
529 - commit message as a localstr |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
530 - dict of extra metadata |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
531 |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
532 Unless you need to access all fields, consider calling |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
533 ``changelogrevision`` instead, as it is faster for partial object |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
534 access. |
3077
ad6aecaf4eed
document changelog format
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
2859
diff
changeset
|
535 """ |
47385
9d9eb22b9b69
revlog: no longer return sidedata from `_revisiondata`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47383
diff
changeset
|
536 d = self._revisiondata(nodeorrev) |
47383
659a452ee263
revlog: use `self.sidedata` directly to construct changelogrevision
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47241
diff
changeset
|
537 sidedata = self.sidedata(nodeorrev) |
659a452ee263
revlog: use `self.sidedata` directly to construct changelogrevision
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47241
diff
changeset
|
538 copy_sd = self._copiesstorage == b'changeset-sidedata' |
659a452ee263
revlog: use `self.sidedata` directly to construct changelogrevision
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47241
diff
changeset
|
539 c = changelogrevision(self, d, sidedata, copy_sd) |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
43027
diff
changeset
|
540 return (c.manifest, c.user, c.date, c.files, c.description, c.extra) |
3233
2f35961854fb
[extendedchangelog] add extra metadata in the changelog entry
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3232
diff
changeset
|
541 |
28487
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
542 def changelogrevision(self, nodeorrev): |
98d98a645e9d
changelog: add class to represent parsed changelog revisions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28315
diff
changeset
|
543 """Obtain a ``changelogrevision`` for a node or revision.""" |
47385
9d9eb22b9b69
revlog: no longer return sidedata from `_revisiondata`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47383
diff
changeset
|
544 text = self._revisiondata(nodeorrev) |
47383
659a452ee263
revlog: use `self.sidedata` directly to construct changelogrevision
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47241
diff
changeset
|
545 sidedata = self.sidedata(nodeorrev) |
43230
e51f5d06a99c
sidedatacopies: only read from copies when in this mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
546 return changelogrevision( |
46780
6266d19556ad
node: introduce nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents:
46714
diff
changeset
|
547 self, text, sidedata, self._copiesstorage == b'changeset-sidedata' |
43230
e51f5d06a99c
sidedatacopies: only read from copies when in this mode
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
548 ) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
549 |
46631
230f73019e49
changelog: rename parameters to reflect semantics
Joerg Sonnenberger <joerg@bec.de>
parents:
46607
diff
changeset
|
550 def readfiles(self, nodeorrev): |
27439
ed003859f1d8
changelog: add a new method to get files modified by a changeset
Laurent Charignon <lcharignon@fb.com>
parents:
26094
diff
changeset
|
551 """ |
ed003859f1d8
changelog: add a new method to get files modified by a changeset
Laurent Charignon <lcharignon@fb.com>
parents:
26094
diff
changeset
|
552 short version of read that only returns the files modified by the cset |
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553 """ |
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554 text = self.revision(nodeorrev) |
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555 if not text: |
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556 return [] |
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557 last = text.index(b"\n\n") |
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558 l = text[:last].split(b'\n') |
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559 return l[3:] |
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560 |
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561 def add( |
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562 self, |
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563 manifest, |
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564 files, |
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565 desc, |
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566 transaction, |
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567 p1, |
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568 p2, |
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569 user, |
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570 date=None, |
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571 extra=None, |
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572 ): |
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573 # Convert to UTF-8 encoded bytestrings as the very first |
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574 # thing: calling any method on a localstr object will turn it |
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575 # into a str object and the cached UTF-8 string is thus lost. |
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576 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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577 |
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578 user = user.strip() |
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579 # An empty username or a username with a "\n" will make the |
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580 # revision text contain two "\n\n" sequences -> corrupt |
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581 # repository since read cannot unpack the revision. |
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582 if not user: |
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583 raise error.StorageError(_(b"empty username")) |
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584 if b"\n" in user: |
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585 raise error.StorageError( |
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586 _(b"username %r contains a newline") % pycompat.bytestr(user) |
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587 ) |
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588 |
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589 desc = stripdesc(desc) |
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590 |
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591 if date: |
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592 parseddate = b"%d %d" % dateutil.parsedate(date) |
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593 else: |
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594 parseddate = b"%d %d" % dateutil.makedate() |
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595 if extra: |
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596 branch = extra.get(b"branch") |
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597 if branch in (b"default", b""): |
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598 del extra[b"branch"] |
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599 elif branch in (b".", b"null", b"tip"): |
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600 raise error.StorageError( |
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601 _(b'the name \'%s\' is reserved') % branch |
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602 ) |
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603 sortedfiles = sorted(files.touched) |
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604 flags = 0 |
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605 sidedata = None |
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606 if self._copiesstorage == b'changeset-sidedata': |
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607 if files.has_copies_info: |
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608 flags |= flagutil.REVIDX_HASCOPIESINFO |
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609 sidedata = metadata.encode_files_sidedata(files) |
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610 |
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611 if extra: |
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612 extra = encodeextra(extra) |
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613 parseddate = b"%s %s" % (parseddate, extra) |
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614 l = [hex(manifest), user, parseddate] + sortedfiles + [b"", desc] |
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615 text = b"\n".join(l) |
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616 rev = self.addrevision( |
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617 text, transaction, len(self), p1, p2, sidedata=sidedata, flags=flags |
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618 ) |
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619 return self.node(rev) |
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620 |
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621 def branchinfo(self, rev): |
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622 """return the branch name and open/close state of a revision |
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623 |
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624 This function exists because creating a changectx object |
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625 just to access this is costly.""" |
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626 return self.changelogrevision(rev).branchinfo |
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|
627 |
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628 def _nodeduplicatecallback(self, transaction, rev): |
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629 # keep track of revisions that got "re-added", eg: unbunde of know rev. |
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630 # |
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631 # We track them in a list to preserve their order from the source bundle |
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632 duplicates = transaction.changes.setdefault(b'revduplicates', []) |
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633 duplicates.append(rev) |