Mercurial > hg
annotate mercurial/changelog.py @ 28219:97fe88806f6f
check-code: allow old style class with special comments
The following chgserver change will use an old style class to comply with
SocketServer's code style. This patch made it possible to pass check-code.
author | Jun Wu <quark@fb.com> |
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date | Wed, 24 Feb 2016 18:42:14 +0000 |
parents | ed003859f1d8 |
children | d698c11bd189 |
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 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 |
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17 from . import ( |
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18 encoding, |
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19 error, |
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20 revlog, |
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21 util, |
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22 ) |
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23 |
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24 _defaultextra = {'branch': 'default'} |
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25 |
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26 def _string_escape(text): |
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27 """ |
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28 >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)} |
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29 >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d |
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30 >>> s |
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31 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' |
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32 >>> res = _string_escape(s) |
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33 >>> s == res.decode('string_escape') |
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34 True |
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35 """ |
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36 # subset of the string_escape codec |
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37 text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') |
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38 return text.replace('\0', '\\0') |
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39 |
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40 def decodeextra(text): |
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41 """ |
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42 >>> sorted(decodeextra(encodeextra({'foo': 'bar', 'baz': chr(0) + '2'}) |
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43 ... ).iteritems()) |
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44 [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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45 >>> sorted(decodeextra(encodeextra({'foo': 'bar', |
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46 ... 'baz': chr(92) + chr(0) + '2'}) |
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47 ... ).iteritems()) |
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48 [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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49 """ |
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50 extra = _defaultextra.copy() |
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51 for l in text.split('\0'): |
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52 if l: |
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53 if '\\0' in l: |
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54 # fix up \0 without getting into trouble with \\0 |
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55 l = l.replace('\\\\', '\\\\\n') |
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56 l = l.replace('\\0', '\0') |
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57 l = l.replace('\n', '') |
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58 k, v = l.decode('string_escape').split(':', 1) |
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59 extra[k] = v |
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60 return extra |
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61 |
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62 def encodeextra(d): |
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63 # keys must be sorted to produce a deterministic changelog entry |
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64 items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)] |
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65 return "\0".join(items) |
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66 |
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67 def stripdesc(desc): |
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68 """strip trailing whitespace and leading and trailing empty lines""" |
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69 return '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n') |
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70 |
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71 class appender(object): |
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72 '''the changelog index must be updated last on disk, so we use this class |
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73 to delay writes to it''' |
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74 def __init__(self, vfs, name, mode, buf): |
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75 self.data = buf |
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76 fp = vfs(name, mode) |
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77 self.fp = fp |
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78 self.offset = fp.tell() |
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79 self.size = vfs.fstat(fp).st_size |
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80 |
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81 def end(self): |
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82 return self.size + len("".join(self.data)) |
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83 def tell(self): |
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84 return self.offset |
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85 def flush(self): |
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86 pass |
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87 def close(self): |
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88 self.fp.close() |
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89 |
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90 def seek(self, offset, whence=0): |
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91 '''virtual file offset spans real file and data''' |
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92 if whence == 0: |
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93 self.offset = offset |
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94 elif whence == 1: |
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95 self.offset += offset |
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96 elif whence == 2: |
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97 self.offset = self.end() + offset |
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98 if self.offset < self.size: |
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99 self.fp.seek(self.offset) |
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100 |
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101 def read(self, count=-1): |
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102 '''only trick here is reads that span real file and data''' |
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103 ret = "" |
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104 if self.offset < self.size: |
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105 s = self.fp.read(count) |
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106 ret = s |
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107 self.offset += len(s) |
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108 if count > 0: |
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109 count -= len(s) |
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110 if count != 0: |
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111 doff = self.offset - self.size |
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112 self.data.insert(0, "".join(self.data)) |
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113 del self.data[1:] |
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114 s = self.data[0][doff:doff + count] |
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115 self.offset += len(s) |
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116 ret += s |
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117 return ret |
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118 |
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119 def write(self, s): |
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120 self.data.append(str(s)) |
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121 self.offset += len(s) |
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122 |
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123 def _divertopener(opener, target): |
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124 """build an opener that writes in 'target.a' instead of 'target'""" |
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125 def _divert(name, mode='r'): |
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126 if name != target: |
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127 return opener(name, mode) |
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128 return opener(name + ".a", mode) |
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129 return _divert |
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130 |
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131 def _delayopener(opener, target, buf): |
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132 """build an opener that stores chunks in 'buf' instead of 'target'""" |
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133 def _delay(name, mode='r'): |
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134 if name != target: |
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135 return opener(name, mode) |
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136 return appender(opener, name, mode, buf) |
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137 return _delay |
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138 |
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139 class changelog(revlog.revlog): |
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140 def __init__(self, opener): |
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141 revlog.revlog.__init__(self, opener, "00changelog.i") |
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142 if self._initempty: |
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143 # changelogs don't benefit from generaldelta |
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144 self.version &= ~revlog.REVLOGGENERALDELTA |
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145 self._generaldelta = False |
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146 self._realopener = opener |
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147 self._delayed = False |
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148 self._delaybuf = None |
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149 self._divert = False |
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150 self.filteredrevs = frozenset() |
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151 |
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152 def tip(self): |
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153 """filtered version of revlog.tip""" |
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154 for i in xrange(len(self) -1, -2, -1): |
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155 if i not in self.filteredrevs: |
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156 return self.node(i) |
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157 |
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158 def __contains__(self, rev): |
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159 """filtered version of revlog.__contains__""" |
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160 return (0 <= rev < len(self) |
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161 and rev not in self.filteredrevs) |
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162 |
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163 def __iter__(self): |
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164 """filtered version of revlog.__iter__""" |
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165 if len(self.filteredrevs) == 0: |
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166 return revlog.revlog.__iter__(self) |
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167 |
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168 def filterediter(): |
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169 for i in xrange(len(self)): |
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170 if i not in self.filteredrevs: |
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171 yield i |
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172 |
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173 return filterediter() |
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174 |
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175 def revs(self, start=0, stop=None): |
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176 """filtered version of revlog.revs""" |
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177 for i in super(changelog, self).revs(start, stop): |
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178 if i not in self.filteredrevs: |
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179 yield i |
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180 |
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181 @util.propertycache |
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182 def nodemap(self): |
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183 # XXX need filtering too |
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184 self.rev(self.node(0)) |
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185 return self._nodecache |
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186 |
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187 def reachableroots(self, minroot, heads, roots, includepath=False): |
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188 return self.index.reachableroots2(minroot, heads, roots, includepath) |
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189 |
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190 def headrevs(self): |
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191 if self.filteredrevs: |
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192 try: |
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193 return self.index.headrevsfiltered(self.filteredrevs) |
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194 # AttributeError covers non-c-extension environments and |
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195 # old c extensions without filter handling. |
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196 except AttributeError: |
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197 return self._headrevs() |
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198 |
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199 return super(changelog, self).headrevs() |
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200 |
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201 def strip(self, *args, **kwargs): |
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202 # XXX make something better than assert |
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203 # We can't expect proper strip behavior if we are filtered. |
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204 assert not self.filteredrevs |
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205 super(changelog, self).strip(*args, **kwargs) |
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206 |
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207 def rev(self, node): |
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208 """filtered version of revlog.rev""" |
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209 r = super(changelog, self).rev(node) |
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210 if r in self.filteredrevs: |
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211 raise error.FilteredLookupError(hex(node), self.indexfile, |
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212 _('filtered node')) |
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213 return r |
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214 |
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215 def node(self, rev): |
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216 """filtered version of revlog.node""" |
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217 if rev in self.filteredrevs: |
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218 raise error.FilteredIndexError(rev) |
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219 return super(changelog, self).node(rev) |
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220 |
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221 def linkrev(self, rev): |
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222 """filtered version of revlog.linkrev""" |
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223 if rev in self.filteredrevs: |
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224 raise error.FilteredIndexError(rev) |
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225 return super(changelog, self).linkrev(rev) |
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226 |
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227 def parentrevs(self, rev): |
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228 """filtered version of revlog.parentrevs""" |
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229 if rev in self.filteredrevs: |
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230 raise error.FilteredIndexError(rev) |
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231 return super(changelog, self).parentrevs(rev) |
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232 |
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233 def flags(self, rev): |
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234 """filtered version of revlog.flags""" |
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235 if rev in self.filteredrevs: |
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236 raise error.FilteredIndexError(rev) |
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237 return super(changelog, self).flags(rev) |
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238 |
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239 def delayupdate(self, tr): |
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240 "delay visibility of index updates to other readers" |
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241 |
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242 if not self._delayed: |
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243 if len(self) == 0: |
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244 self._divert = True |
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245 if self._realopener.exists(self.indexfile + '.a'): |
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246 self._realopener.unlink(self.indexfile + '.a') |
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247 self.opener = _divertopener(self._realopener, self.indexfile) |
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248 else: |
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249 self._delaybuf = [] |
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250 self.opener = _delayopener(self._realopener, self.indexfile, |
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251 self._delaybuf) |
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252 self._delayed = True |
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253 tr.addpending('cl-%i' % id(self), self._writepending) |
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254 tr.addfinalize('cl-%i' % id(self), self._finalize) |
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255 |
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256 def _finalize(self, tr): |
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257 "finalize index updates" |
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258 self._delayed = False |
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259 self.opener = self._realopener |
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260 # move redirected index data back into place |
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261 if self._divert: |
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262 assert not self._delaybuf |
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263 tmpname = self.indexfile + ".a" |
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264 nfile = self.opener.open(tmpname) |
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265 nfile.close() |
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266 self.opener.rename(tmpname, self.indexfile) |
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267 elif self._delaybuf: |
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268 fp = self.opener(self.indexfile, 'a') |
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269 fp.write("".join(self._delaybuf)) |
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270 fp.close() |
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271 self._delaybuf = None |
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272 self._divert = False |
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273 # split when we're done |
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274 self.checkinlinesize(tr) |
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275 |
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276 def readpending(self, file): |
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277 """read index data from a "pending" file |
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278 |
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279 During a transaction, the actual changeset data is already stored in the |
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280 main file, but not yet finalized in the on-disk index. Instead, a |
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281 "pending" index is written by the transaction logic. If this function |
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282 is running, we are likely in a subprocess invoked in a hook. The |
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283 subprocess is informed that it is within a transaction and needs to |
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284 access its content. |
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285 |
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286 This function will read all the index data out of the pending file and |
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287 overwrite the main index.""" |
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288 |
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289 if not self.opener.exists(file): |
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290 return # no pending data for changelog |
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291 r = revlog.revlog(self.opener, file) |
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292 self.index = r.index |
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293 self.nodemap = r.nodemap |
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294 self._nodecache = r._nodecache |
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295 self._chunkcache = r._chunkcache |
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296 |
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297 def _writepending(self, tr): |
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298 "create a file containing the unfinalized state for pretxnchangegroup" |
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299 if self._delaybuf: |
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300 # make a temporary copy of the index |
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301 fp1 = self._realopener(self.indexfile) |
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302 pendingfilename = self.indexfile + ".a" |
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303 # register as a temp file to ensure cleanup on failure |
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304 tr.registertmp(pendingfilename) |
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305 # write existing data |
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306 fp2 = self._realopener(pendingfilename, "w") |
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307 fp2.write(fp1.read()) |
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308 # add pending data |
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309 fp2.write("".join(self._delaybuf)) |
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310 fp2.close() |
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311 # switch modes so finalize can simply rename |
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312 self._delaybuf = None |
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313 self._divert = True |
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314 self.opener = _divertopener(self._realopener, self.indexfile) |
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315 |
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316 if self._divert: |
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317 return True |
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318 |
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319 return False |
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320 |
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321 def checkinlinesize(self, tr, fp=None): |
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322 if not self._delayed: |
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323 revlog.revlog.checkinlinesize(self, tr, fp) |
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324 |
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325 def read(self, node): |
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326 """ |
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327 format used: |
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328 nodeid\n : manifest node in ascii |
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329 user\n : user, no \n or \r allowed |
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330 time tz extra\n : date (time is int or float, timezone is int) |
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331 : extra is metadata, encoded and separated by '\0' |
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332 : older versions ignore it |
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333 files\n\n : files modified by the cset, no \n or \r allowed |
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334 (.*) : comment (free text, ideally utf-8) |
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335 |
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336 changelog v0 doesn't use extra |
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337 """ |
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338 text = self.revision(node) |
37 | 339 if not text: |
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340 return (nullid, "", (0, 0), [], "", _defaultextra) |
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341 last = text.index("\n\n") |
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342 desc = encoding.tolocal(text[last + 2:]) |
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343 l = text[:last].split('\n') |
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344 manifest = bin(l[0]) |
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345 user = encoding.tolocal(l[1]) |
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346 |
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347 tdata = l[2].split(' ', 2) |
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348 if len(tdata) != 3: |
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349 time = float(tdata[0]) |
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350 try: |
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351 # various tools did silly things with the time zone field. |
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352 timezone = int(tdata[1]) |
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353 except ValueError: |
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354 timezone = 0 |
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355 extra = _defaultextra |
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356 else: |
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357 time, timezone = float(tdata[0]), int(tdata[1]) |
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358 extra = decodeextra(tdata[2]) |
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359 |
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360 files = l[3:] |
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361 return (manifest, user, (time, timezone), files, desc, extra) |
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362 |
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363 def readfiles(self, node): |
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364 """ |
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365 short version of read that only returns the files modified by the cset |
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366 """ |
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367 text = self.revision(node) |
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368 if not text: |
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369 return [] |
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370 last = text.index("\n\n") |
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371 l = text[:last].split('\n') |
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372 return l[3:] |
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373 |
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374 def add(self, manifest, files, desc, transaction, p1, p2, |
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375 user, date=None, extra=None): |
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376 # Convert to UTF-8 encoded bytestrings as the very first |
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377 # thing: calling any method on a localstr object will turn it |
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378 # into a str object and the cached UTF-8 string is thus lost. |
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379 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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380 |
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381 user = user.strip() |
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382 # An empty username or a username with a "\n" will make the |
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383 # revision text contain two "\n\n" sequences -> corrupt |
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384 # repository since read cannot unpack the revision. |
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385 if not user: |
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386 raise error.RevlogError(_("empty username")) |
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387 if "\n" in user: |
7633 | 388 raise error.RevlogError(_("username %s contains a newline") |
389 % repr(user)) | |
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390 |
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391 desc = stripdesc(desc) |
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392 |
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393 if date: |
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394 parseddate = "%d %d" % util.parsedate(date) |
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395 else: |
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396 parseddate = "%d %d" % util.makedate() |
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397 if extra: |
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398 branch = extra.get("branch") |
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399 if branch in ("default", ""): |
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400 del extra["branch"] |
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401 elif branch in (".", "null", "tip"): |
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402 raise error.RevlogError(_('the name \'%s\' is reserved') |
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403 % branch) |
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404 if extra: |
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405 extra = encodeextra(extra) |
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406 parseddate = "%s %s" % (parseddate, extra) |
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407 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
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408 text = "\n".join(l) |
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409 return self.addrevision(text, transaction, len(self), p1, p2) |
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410 |
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411 def branchinfo(self, rev): |
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412 """return the branch name and open/close state of a revision |
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413 |
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414 This function exists because creating a changectx object |
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415 just to access this is costly.""" |
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416 extra = self.read(rev)[5] |
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417 return encoding.tolocal(extra.get("branch")), 'close' in extra |