Mercurial > hg
annotate mercurial/changelog.py @ 34879:7d51a7792f52
subrepo: implement 'unshare' for Mercurial subrepos
I think there's a slight hole here in that a subrepo could be shared, removed
from .hgsub, and then it's not part of context.substate (so not iterated over).
But the push command has the same hole IIRC, and I think removing a subrepo is
an edge case.
The import hack is a copy/paste of subrepo.subrepo().
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Tue, 17 Oct 2017 22:55:33 -0400 |
parents | 50474f0b3f1b |
children | 137a08d82232 |
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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 Matt Mackall <mpm@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 nullid, |
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15 ) |
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16 from .thirdparty import ( |
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17 attr, |
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18 ) |
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19 |
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20 from . import ( |
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21 encoding, |
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22 error, |
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23 revlog, |
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24 util, |
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25 ) |
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26 |
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27 _defaultextra = {'branch': 'default'} |
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28 |
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29 def _string_escape(text): |
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30 """ |
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31 >>> from .pycompat import bytechr as chr |
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32 >>> d = {b'nl': chr(10), b'bs': chr(92), b'cr': chr(13), b'nul': chr(0)} |
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33 >>> s = b"ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d |
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34 >>> s |
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35 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' |
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36 >>> res = _string_escape(s) |
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37 >>> s == util.unescapestr(res) |
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38 True |
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39 """ |
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40 # subset of the string_escape codec |
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41 text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') |
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42 return text.replace('\0', '\\0') |
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43 |
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44 def decodeextra(text): |
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45 """ |
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46 >>> from .pycompat import bytechr as chr |
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47 >>> sorted(decodeextra(encodeextra({b'foo': b'bar', b'baz': chr(0) + b'2'}) |
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48 ... ).items()) |
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49 [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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50 >>> sorted(decodeextra(encodeextra({b'foo': b'bar', |
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51 ... b'baz': chr(92) + chr(0) + b'2'}) |
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52 ... ).items()) |
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53 [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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54 """ |
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55 extra = _defaultextra.copy() |
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56 for l in text.split('\0'): |
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57 if l: |
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58 if '\\0' in l: |
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59 # fix up \0 without getting into trouble with \\0 |
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60 l = l.replace('\\\\', '\\\\\n') |
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61 l = l.replace('\\0', '\0') |
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62 l = l.replace('\n', '') |
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63 k, v = util.unescapestr(l).split(':', 1) |
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64 extra[k] = v |
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65 return extra |
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66 |
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67 def encodeextra(d): |
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68 # keys must be sorted to produce a deterministic changelog entry |
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69 items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)] |
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70 return "\0".join(items) |
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71 |
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72 def stripdesc(desc): |
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73 """strip trailing whitespace and leading and trailing empty lines""" |
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74 return '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n') |
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75 |
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76 class appender(object): |
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77 '''the changelog index must be updated last on disk, so we use this class |
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78 to delay writes to it''' |
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79 def __init__(self, vfs, name, mode, buf): |
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80 self.data = buf |
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81 fp = vfs(name, mode) |
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82 self.fp = fp |
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83 self.offset = fp.tell() |
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84 self.size = vfs.fstat(fp).st_size |
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85 self._end = self.size |
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86 |
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87 def end(self): |
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88 return self._end |
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89 def tell(self): |
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90 return self.offset |
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91 def flush(self): |
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92 pass |
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93 def close(self): |
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94 self.fp.close() |
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95 |
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96 def seek(self, offset, whence=0): |
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97 '''virtual file offset spans real file and data''' |
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98 if whence == 0: |
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99 self.offset = offset |
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100 elif whence == 1: |
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101 self.offset += offset |
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102 elif whence == 2: |
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103 self.offset = self.end() + offset |
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104 if self.offset < self.size: |
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105 self.fp.seek(self.offset) |
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106 |
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107 def read(self, count=-1): |
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108 '''only trick here is reads that span real file and data''' |
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109 ret = "" |
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110 if self.offset < self.size: |
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111 s = self.fp.read(count) |
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112 ret = s |
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113 self.offset += len(s) |
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114 if count > 0: |
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115 count -= len(s) |
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116 if count != 0: |
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117 doff = self.offset - self.size |
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118 self.data.insert(0, "".join(self.data)) |
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119 del self.data[1:] |
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120 s = self.data[0][doff:doff + count] |
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121 self.offset += len(s) |
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122 ret += s |
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123 return ret |
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124 |
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125 def write(self, s): |
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126 self.data.append(bytes(s)) |
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127 self.offset += len(s) |
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128 self._end += len(s) |
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129 |
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130 def _divertopener(opener, target): |
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131 """build an opener that writes in 'target.a' instead of 'target'""" |
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132 def _divert(name, mode='r', checkambig=False): |
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133 if name != target: |
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134 return opener(name, mode) |
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135 return opener(name + ".a", mode) |
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136 return _divert |
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137 |
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138 def _delayopener(opener, target, buf): |
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139 """build an opener that stores chunks in 'buf' instead of 'target'""" |
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140 def _delay(name, mode='r', checkambig=False): |
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141 if name != target: |
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142 return opener(name, mode) |
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143 return appender(opener, name, mode, buf) |
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144 return _delay |
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145 |
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146 @attr.s |
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147 class _changelogrevision(object): |
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148 # Extensions might modify _defaultextra, so let the constructor below pass |
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149 # it in |
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150 extra = attr.ib() |
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151 manifest = attr.ib(default=nullid) |
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152 user = attr.ib(default='') |
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153 date = attr.ib(default=(0, 0)) |
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154 files = attr.ib(default=attr.Factory(list)) |
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155 description = attr.ib(default='') |
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156 |
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157 class changelogrevision(object): |
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158 """Holds results of a parsed changelog revision. |
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159 |
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160 Changelog revisions consist of multiple pieces of data, including |
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161 the manifest node, user, and date. This object exposes a view into |
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162 the parsed object. |
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163 """ |
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164 |
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165 __slots__ = ( |
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166 u'_offsets', |
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167 u'_text', |
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168 ) |
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169 |
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170 def __new__(cls, text): |
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171 if not text: |
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172 return _changelogrevision(extra=_defaultextra) |
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173 |
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174 self = super(changelogrevision, cls).__new__(cls) |
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175 # We could return here and implement the following as an __init__. |
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176 # But doing it here is equivalent and saves an extra function call. |
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177 |
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178 # format used: |
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179 # nodeid\n : manifest node in ascii |
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180 # user\n : user, no \n or \r allowed |
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181 # time tz extra\n : date (time is int or float, timezone is int) |
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182 # : extra is metadata, encoded and separated by '\0' |
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183 # : older versions ignore it |
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184 # files\n\n : files modified by the cset, no \n or \r allowed |
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185 # (.*) : comment (free text, ideally utf-8) |
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186 # |
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187 # changelog v0 doesn't use extra |
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188 |
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189 nl1 = text.index('\n') |
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190 nl2 = text.index('\n', nl1 + 1) |
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191 nl3 = text.index('\n', nl2 + 1) |
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192 |
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193 # The list of files may be empty. Which means nl3 is the first of the |
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194 # double newline that precedes the description. |
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195 if text[nl3 + 1:nl3 + 2] == '\n': |
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196 doublenl = nl3 |
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197 else: |
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198 doublenl = text.index('\n\n', nl3 + 1) |
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199 |
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200 self._offsets = (nl1, nl2, nl3, doublenl) |
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201 self._text = text |
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202 |
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203 return self |
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204 |
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205 @property |
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206 def manifest(self): |
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207 return bin(self._text[0:self._offsets[0]]) |
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208 |
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209 @property |
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210 def user(self): |
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211 off = self._offsets |
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212 return encoding.tolocal(self._text[off[0] + 1:off[1]]) |
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213 |
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214 @property |
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215 def _rawdate(self): |
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216 off = self._offsets |
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217 dateextra = self._text[off[1] + 1:off[2]] |
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218 return dateextra.split(' ', 2)[0:2] |
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219 |
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220 @property |
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221 def _rawextra(self): |
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222 off = self._offsets |
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223 dateextra = self._text[off[1] + 1:off[2]] |
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224 fields = dateextra.split(' ', 2) |
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225 if len(fields) != 3: |
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226 return None |
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227 |
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228 return fields[2] |
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229 |
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230 @property |
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231 def date(self): |
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232 raw = self._rawdate |
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233 time = float(raw[0]) |
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234 # Various tools did silly things with the timezone. |
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235 try: |
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236 timezone = int(raw[1]) |
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237 except ValueError: |
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238 timezone = 0 |
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239 |
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240 return time, timezone |
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241 |
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242 @property |
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243 def extra(self): |
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244 raw = self._rawextra |
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245 if raw is None: |
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246 return _defaultextra |
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247 |
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248 return decodeextra(raw) |
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249 |
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250 @property |
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251 def files(self): |
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252 off = self._offsets |
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253 if off[2] == off[3]: |
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254 return [] |
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255 |
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256 return self._text[off[2] + 1:off[3]].split('\n') |
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257 |
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258 @property |
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259 def description(self): |
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260 return encoding.tolocal(self._text[self._offsets[3] + 2:]) |
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261 |
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262 class changelog(revlog.revlog): |
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263 def __init__(self, opener, trypending=False): |
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264 """Load a changelog revlog using an opener. |
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265 |
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266 If ``trypending`` is true, we attempt to load the index from a |
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267 ``00changelog.i.a`` file instead of the default ``00changelog.i``. |
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268 The ``00changelog.i.a`` file contains index (and possibly inline |
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269 revision) data for a transaction that hasn't been finalized yet. |
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270 It exists in a separate file to facilitate readers (such as |
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271 hooks processes) accessing data before a transaction is finalized. |
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272 """ |
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273 if trypending and opener.exists('00changelog.i.a'): |
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274 indexfile = '00changelog.i.a' |
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275 else: |
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276 indexfile = '00changelog.i' |
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277 |
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278 datafile = '00changelog.d' |
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279 revlog.revlog.__init__(self, opener, indexfile, datafile=datafile, |
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280 checkambig=True, mmaplargeindex=True) |
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281 |
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282 if self._initempty: |
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283 # changelogs don't benefit from generaldelta |
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284 self.version &= ~revlog.FLAG_GENERALDELTA |
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285 self._generaldelta = False |
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286 |
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287 # Delta chains for changelogs tend to be very small because entries |
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288 # tend to be small and don't delta well with each. So disable delta |
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289 # chains. |
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290 self.storedeltachains = False |
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291 |
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292 self._realopener = opener |
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293 self._delayed = False |
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294 self._delaybuf = None |
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295 self._divert = False |
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296 self.filteredrevs = frozenset() |
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297 |
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298 def tip(self): |
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299 """filtered version of revlog.tip""" |
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300 for i in xrange(len(self) -1, -2, -1): |
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301 if i not in self.filteredrevs: |
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302 return self.node(i) |
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303 |
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304 def __contains__(self, rev): |
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305 """filtered version of revlog.__contains__""" |
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306 return (0 <= rev < len(self) |
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307 and rev not in self.filteredrevs) |
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308 |
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309 def __iter__(self): |
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310 """filtered version of revlog.__iter__""" |
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311 if len(self.filteredrevs) == 0: |
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312 return revlog.revlog.__iter__(self) |
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313 |
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314 def filterediter(): |
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315 for i in xrange(len(self)): |
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316 if i not in self.filteredrevs: |
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317 yield i |
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318 |
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319 return filterediter() |
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320 |
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321 def revs(self, start=0, stop=None): |
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322 """filtered version of revlog.revs""" |
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323 for i in super(changelog, self).revs(start, stop): |
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324 if i not in self.filteredrevs: |
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325 yield i |
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326 |
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327 @util.propertycache |
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328 def nodemap(self): |
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329 # XXX need filtering too |
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330 self.rev(self.node(0)) |
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331 return self._nodecache |
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332 |
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333 def reachableroots(self, minroot, heads, roots, includepath=False): |
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334 return self.index.reachableroots2(minroot, heads, roots, includepath) |
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335 |
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336 def headrevs(self): |
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337 if self.filteredrevs: |
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338 try: |
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339 return self.index.headrevsfiltered(self.filteredrevs) |
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340 # AttributeError covers non-c-extension environments and |
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341 # old c extensions without filter handling. |
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342 except AttributeError: |
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343 return self._headrevs() |
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344 |
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345 return super(changelog, self).headrevs() |
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346 |
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347 def strip(self, *args, **kwargs): |
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348 # XXX make something better than assert |
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349 # We can't expect proper strip behavior if we are filtered. |
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350 assert not self.filteredrevs |
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351 super(changelog, self).strip(*args, **kwargs) |
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352 |
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353 def rev(self, node): |
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354 """filtered version of revlog.rev""" |
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355 r = super(changelog, self).rev(node) |
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356 if r in self.filteredrevs: |
23015
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repoview: add a FilteredLookupError class
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357 raise error.FilteredLookupError(hex(node), self.indexfile, |
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358 _('filtered node')) |
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359 return r |
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360 |
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361 def node(self, rev): |
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362 """filtered version of revlog.node""" |
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363 if rev in self.filteredrevs: |
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364 raise error.FilteredIndexError(rev) |
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365 return super(changelog, self).node(rev) |
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366 |
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367 def linkrev(self, rev): |
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368 """filtered version of revlog.linkrev""" |
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369 if rev in self.filteredrevs: |
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370 raise error.FilteredIndexError(rev) |
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371 return super(changelog, self).linkrev(rev) |
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372 |
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373 def parentrevs(self, rev): |
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374 """filtered version of revlog.parentrevs""" |
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375 if rev in self.filteredrevs: |
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376 raise error.FilteredIndexError(rev) |
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377 return super(changelog, self).parentrevs(rev) |
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378 |
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379 def flags(self, rev): |
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380 """filtered version of revlog.flags""" |
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381 if rev in self.filteredrevs: |
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382 raise error.FilteredIndexError(rev) |
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383 return super(changelog, self).flags(rev) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
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|
384 |
23203
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385 def delayupdate(self, tr): |
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386 "delay visibility of index updates to other readers" |
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387 |
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388 if not self._delayed: |
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389 if len(self) == 0: |
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390 self._divert = True |
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391 if self._realopener.exists(self.indexfile + '.a'): |
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392 self._realopener.unlink(self.indexfile + '.a') |
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393 self.opener = _divertopener(self._realopener, self.indexfile) |
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394 else: |
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395 self._delaybuf = [] |
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396 self.opener = _delayopener(self._realopener, self.indexfile, |
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|
397 self._delaybuf) |
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|
398 self._delayed = True |
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|
399 tr.addpending('cl-%i' % id(self), self._writepending) |
23281
f60ed8cf4afc
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|
400 tr.addfinalize('cl-%i' % id(self), self._finalize) |
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|
401 |
23205
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|
402 def _finalize(self, tr): |
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403 "finalize index updates" |
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|
404 self._delayed = False |
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405 self.opener = self._realopener |
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|
406 # move redirected index data back into place |
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407 if self._divert: |
23201
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changeset
|
408 assert not self._delaybuf |
19898
3f92e749d381
changelog: use "vfs.rename()" instead of "util.rename()"
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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diff
changeset
|
409 tmpname = self.indexfile + ".a" |
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parents:
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diff
changeset
|
410 nfile = self.opener.open(tmpname) |
14207
c1cca38818b9
changelog: fixes leaked file handle
Zachary Gramana <zgramana@pottsconsultinggroup.com>
parents:
14004
diff
changeset
|
411 nfile.close() |
29999
003c41edc5f5
changelog: specify checkambig=True to avoid ambiguity around truncation
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parents:
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diff
changeset
|
412 self.opener.rename(tmpname, self.indexfile, checkambig=True) |
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413 elif self._delaybuf: |
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|
414 fp = self.opener(self.indexfile, 'a', checkambig=True) |
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415 fp.write("".join(self._delaybuf)) |
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416 fp.close() |
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417 self._delaybuf = None |
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418 self._divert = False |
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419 # split when we're done |
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420 self.checkinlinesize(tr) |
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|
421 |
23280
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diff
changeset
|
422 def _writepending(self, tr): |
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|
423 "create a file containing the unfinalized state for pretxnchangegroup" |
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424 if self._delaybuf: |
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425 # make a temporary copy of the index |
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|
426 fp1 = self._realopener(self.indexfile) |
23292
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changelog: register changelog.i.a as a temporary file
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|
427 pendingfilename = self.indexfile + ".a" |
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|
428 # register as a temp file to ensure cleanup on failure |
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|
429 tr.registertmp(pendingfilename) |
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|
430 # write existing data |
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|
431 fp2 = self._realopener(pendingfilename, "w") |
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|
432 fp2.write(fp1.read()) |
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|
433 # add pending data |
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Introduce HG_PREPEND to solve pretxn races
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|
434 fp2.write("".join(self._delaybuf)) |
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|
435 fp2.close() |
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changeset
|
436 # switch modes so finalize can simply rename |
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changeset
|
437 self._delaybuf = None |
9164
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changeset
|
438 self._divert = True |
23201
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changeset
|
439 self.opener = _divertopener(self._realopener, self.indexfile) |
7787
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Introduce HG_PREPEND to solve pretxn races
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changeset
|
440 |
9164
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changeset
|
441 if self._divert: |
7787
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Introduce HG_PREPEND to solve pretxn races
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diff
changeset
|
442 return True |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
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parents:
7634
diff
changeset
|
443 |
b8d750daadde
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parents:
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diff
changeset
|
444 return False |
b8d750daadde
Introduce HG_PREPEND to solve pretxn races
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parents:
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diff
changeset
|
445 |
4261
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changeset
|
446 def checkinlinesize(self, tr, fp=None): |
9165
07f9b2f4a9aa
changelog: swap opener to switch delay modes
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447 if not self._delayed: |
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448 revlog.revlog.checkinlinesize(self, tr, fp) |
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449 |
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450 def read(self, node): |
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451 """Obtain data from a parsed changelog revision. |
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452 |
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453 Returns a 6-tuple of: |
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454 |
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455 - manifest node in binary |
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456 - author/user as a localstr |
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457 - date as a 2-tuple of (time, timezone) |
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458 - list of files |
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459 - commit message as a localstr |
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460 - dict of extra metadata |
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461 |
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462 Unless you need to access all fields, consider calling |
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463 ``changelogrevision`` instead, as it is faster for partial object |
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464 access. |
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465 """ |
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466 c = changelogrevision(self.revision(node)) |
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467 return ( |
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468 c.manifest, |
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469 c.user, |
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470 c.date, |
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471 c.files, |
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472 c.description, |
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473 c.extra |
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474 ) |
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475 |
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476 def changelogrevision(self, nodeorrev): |
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477 """Obtain a ``changelogrevision`` for a node or revision.""" |
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478 return changelogrevision(self.revision(nodeorrev)) |
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479 |
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480 def readfiles(self, node): |
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481 """ |
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482 short version of read that only returns the files modified by the cset |
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483 """ |
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484 text = self.revision(node) |
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485 if not text: |
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486 return [] |
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487 last = text.index("\n\n") |
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488 l = text[:last].split('\n') |
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489 return l[3:] |
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490 |
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491 def add(self, manifest, files, desc, transaction, p1, p2, |
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492 user, date=None, extra=None): |
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493 # Convert to UTF-8 encoded bytestrings as the very first |
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494 # thing: calling any method on a localstr object will turn it |
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495 # into a str object and the cached UTF-8 string is thus lost. |
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496 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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497 |
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498 user = user.strip() |
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499 # An empty username or a username with a "\n" will make the |
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500 # revision text contain two "\n\n" sequences -> corrupt |
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501 # repository since read cannot unpack the revision. |
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502 if not user: |
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503 raise error.RevlogError(_("empty username")) |
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504 if "\n" in user: |
7633 | 505 raise error.RevlogError(_("username %s contains a newline") |
506 % repr(user)) | |
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507 |
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508 desc = stripdesc(desc) |
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509 |
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510 if date: |
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511 parseddate = "%d %d" % util.parsedate(date) |
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512 else: |
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513 parseddate = "%d %d" % util.makedate() |
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514 if extra: |
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515 branch = extra.get("branch") |
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516 if branch in ("default", ""): |
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517 del extra["branch"] |
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518 elif branch in (".", "null", "tip"): |
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519 raise error.RevlogError(_('the name \'%s\' is reserved') |
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520 % branch) |
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521 if extra: |
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522 extra = encodeextra(extra) |
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523 parseddate = "%s %s" % (parseddate, extra) |
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524 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
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525 text = "\n".join(l) |
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526 return self.addrevision(text, transaction, len(self), p1, p2) |
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527 |
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528 def branchinfo(self, rev): |
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529 """return the branch name and open/close state of a revision |
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530 |
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531 This function exists because creating a changectx object |
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532 just to access this is costly.""" |
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533 extra = self.read(rev)[5] |
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534 return encoding.tolocal(extra.get("branch")), 'close' in extra |
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535 |
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536 def _addrevision(self, node, rawtext, transaction, *args, **kwargs): |
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537 # overlay over the standard revlog._addrevision to track the new |
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538 # revision on the transaction. |
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539 rev = len(self) |
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540 node = super(changelog, self)._addrevision(node, rawtext, transaction, |
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541 *args, **kwargs) |
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542 revs = transaction.changes.get('revs') |
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543 if revs is not None: |
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544 revs.add(rev) |
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545 return node |