Mercurial > hg
annotate mercurial/changelog.py @ 24066:afdf5f6ab37a
pager: set an attribute on ui indicating that a pager is active
A subsequent patch will teach the color extension to do different things
depending on whether a pager is active. This patch leaves a breadcrumb
on the ui instance to allow it do that that.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Fri, 06 Feb 2015 12:07:56 -0800 |
parents | 828dc8db5515 |
children | b5cd8c2f6e65 |
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 node import bin, hex, nullid |
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9 from i18n import _ |
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10 import util, error, revlog, encoding |
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11 |
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12 _defaultextra = {'branch': 'default'} |
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13 |
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14 def _string_escape(text): |
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15 """ |
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16 >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)} |
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17 >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d |
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18 >>> s |
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19 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' |
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20 >>> res = _string_escape(s) |
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21 >>> s == res.decode('string_escape') |
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22 True |
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23 """ |
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24 # subset of the string_escape codec |
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25 text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') |
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26 return text.replace('\0', '\\0') |
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27 |
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28 def decodeextra(text): |
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29 """ |
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30 >>> sorted(decodeextra(encodeextra({'foo': 'bar', 'baz': chr(0) + '2'}) |
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31 ... ).iteritems()) |
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32 [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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33 >>> sorted(decodeextra(encodeextra({'foo': 'bar', |
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34 ... 'baz': chr(92) + chr(0) + '2'}) |
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35 ... ).iteritems()) |
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36 [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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37 """ |
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38 extra = _defaultextra.copy() |
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39 for l in text.split('\0'): |
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40 if l: |
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41 if '\\0' in l: |
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42 # fix up \0 without getting into trouble with \\0 |
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43 l = l.replace('\\\\', '\\\\\n') |
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44 l = l.replace('\\0', '\0') |
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45 l = l.replace('\n', '') |
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46 k, v = l.decode('string_escape').split(':', 1) |
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47 extra[k] = v |
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48 return extra |
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49 |
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50 def encodeextra(d): |
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51 # keys must be sorted to produce a deterministic changelog entry |
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52 items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)] |
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53 return "\0".join(items) |
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54 |
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55 def stripdesc(desc): |
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56 """strip trailing whitespace and leading and trailing empty lines""" |
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57 return '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n') |
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58 |
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59 class appender(object): |
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60 '''the changelog index must be updated last on disk, so we use this class |
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61 to delay writes to it''' |
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62 def __init__(self, vfs, name, mode, buf): |
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63 self.data = buf |
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64 fp = vfs(name, mode) |
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65 self.fp = fp |
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66 self.offset = fp.tell() |
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67 self.size = vfs.fstat(fp).st_size |
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68 |
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69 def end(self): |
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70 return self.size + len("".join(self.data)) |
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71 def tell(self): |
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72 return self.offset |
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73 def flush(self): |
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74 pass |
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75 def close(self): |
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76 self.fp.close() |
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77 |
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78 def seek(self, offset, whence=0): |
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79 '''virtual file offset spans real file and data''' |
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80 if whence == 0: |
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81 self.offset = offset |
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82 elif whence == 1: |
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83 self.offset += offset |
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84 elif whence == 2: |
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85 self.offset = self.end() + offset |
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86 if self.offset < self.size: |
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87 self.fp.seek(self.offset) |
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88 |
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89 def read(self, count=-1): |
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90 '''only trick here is reads that span real file and data''' |
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91 ret = "" |
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92 if self.offset < self.size: |
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93 s = self.fp.read(count) |
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94 ret = s |
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95 self.offset += len(s) |
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96 if count > 0: |
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97 count -= len(s) |
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98 if count != 0: |
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99 doff = self.offset - self.size |
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100 self.data.insert(0, "".join(self.data)) |
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101 del self.data[1:] |
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102 s = self.data[0][doff:doff + count] |
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103 self.offset += len(s) |
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104 ret += s |
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105 return ret |
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106 |
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107 def write(self, s): |
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108 self.data.append(str(s)) |
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109 self.offset += len(s) |
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110 |
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111 def _divertopener(opener, target): |
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112 """build an opener that writes in 'target.a' instead of 'target'""" |
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113 def _divert(name, mode='r'): |
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114 if name != target: |
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115 return opener(name, mode) |
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116 return opener(name + ".a", mode) |
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117 return _divert |
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118 |
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119 def _delayopener(opener, target, buf): |
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120 """build an opener that stores chunks in 'buf' instead of 'target'""" |
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121 def _delay(name, mode='r'): |
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122 if name != target: |
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123 return opener(name, mode) |
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124 return appender(opener, name, mode, buf) |
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125 return _delay |
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126 |
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127 class changelog(revlog.revlog): |
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128 def __init__(self, opener): |
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129 revlog.revlog.__init__(self, opener, "00changelog.i") |
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130 if self._initempty: |
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131 # changelogs don't benefit from generaldelta |
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132 self.version &= ~revlog.REVLOGGENERALDELTA |
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133 self._generaldelta = False |
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134 self._realopener = opener |
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135 self._delayed = False |
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136 self._delaybuf = None |
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137 self._divert = False |
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138 self.filteredrevs = frozenset() |
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139 |
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140 def tip(self): |
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141 """filtered version of revlog.tip""" |
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142 for i in xrange(len(self) -1, -2, -1): |
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143 if i not in self.filteredrevs: |
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144 return self.node(i) |
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145 |
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146 def __contains__(self, rev): |
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147 """filtered version of revlog.__contains__""" |
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148 return (revlog.revlog.__contains__(self, rev) |
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149 and rev not in self.filteredrevs) |
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150 |
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151 def __iter__(self): |
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152 """filtered version of revlog.__iter__""" |
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153 if len(self.filteredrevs) == 0: |
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154 return revlog.revlog.__iter__(self) |
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155 |
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156 def filterediter(): |
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157 for i in xrange(len(self)): |
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158 if i not in self.filteredrevs: |
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159 yield i |
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160 |
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161 return filterediter() |
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162 |
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163 def revs(self, start=0, stop=None): |
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164 """filtered version of revlog.revs""" |
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165 for i in super(changelog, self).revs(start, stop): |
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166 if i not in self.filteredrevs: |
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167 yield i |
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168 |
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169 @util.propertycache |
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170 def nodemap(self): |
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171 # XXX need filtering too |
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172 self.rev(self.node(0)) |
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173 return self._nodecache |
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174 |
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175 def hasnode(self, node): |
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176 """filtered version of revlog.hasnode""" |
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177 try: |
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178 i = self.rev(node) |
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179 return i not in self.filteredrevs |
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180 except KeyError: |
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181 return False |
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182 |
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183 def headrevs(self): |
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184 if self.filteredrevs: |
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185 try: |
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186 return self.index.headrevsfiltered(self.filteredrevs) |
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187 # AttributeError covers non-c-extension environments and |
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188 # old c extensions without filter handling. |
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189 except AttributeError: |
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190 return self._headrevs() |
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191 |
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192 return super(changelog, self).headrevs() |
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193 |
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194 def strip(self, *args, **kwargs): |
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195 # XXX make something better than assert |
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196 # We can't expect proper strip behavior if we are filtered. |
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197 assert not self.filteredrevs |
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198 super(changelog, self).strip(*args, **kwargs) |
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199 |
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200 def rev(self, node): |
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201 """filtered version of revlog.rev""" |
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202 r = super(changelog, self).rev(node) |
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203 if r in self.filteredrevs: |
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204 raise error.FilteredLookupError(hex(node), self.indexfile, |
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205 _('filtered node')) |
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206 return r |
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207 |
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208 def node(self, rev): |
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209 """filtered version of revlog.node""" |
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210 if rev in self.filteredrevs: |
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211 raise error.FilteredIndexError(rev) |
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212 return super(changelog, self).node(rev) |
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213 |
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214 def linkrev(self, rev): |
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215 """filtered version of revlog.linkrev""" |
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216 if rev in self.filteredrevs: |
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217 raise error.FilteredIndexError(rev) |
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218 return super(changelog, self).linkrev(rev) |
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219 |
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220 def parentrevs(self, rev): |
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221 """filtered version of revlog.parentrevs""" |
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222 if rev in self.filteredrevs: |
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223 raise error.FilteredIndexError(rev) |
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224 return super(changelog, self).parentrevs(rev) |
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225 |
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226 def flags(self, rev): |
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227 """filtered version of revlog.flags""" |
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228 if rev in self.filteredrevs: |
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229 raise error.FilteredIndexError(rev) |
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230 return super(changelog, self).flags(rev) |
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231 |
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232 def delayupdate(self, tr): |
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233 "delay visibility of index updates to other readers" |
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234 |
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235 if not self._delayed: |
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236 if len(self) == 0: |
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237 self._divert = True |
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238 if self._realopener.exists(self.indexfile + '.a'): |
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239 self._realopener.unlink(self.indexfile + '.a') |
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240 self.opener = _divertopener(self._realopener, self.indexfile) |
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241 else: |
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242 self._delaybuf = [] |
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243 self.opener = _delayopener(self._realopener, self.indexfile, |
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244 self._delaybuf) |
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245 self._delayed = True |
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246 tr.addpending('cl-%i' % id(self), self._writepending) |
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247 tr.addfinalize('cl-%i' % id(self), self._finalize) |
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248 |
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249 def _finalize(self, tr): |
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250 "finalize index updates" |
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251 self._delayed = False |
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252 self.opener = self._realopener |
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253 # move redirected index data back into place |
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254 if self._divert: |
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255 assert not self._delaybuf |
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256 tmpname = self.indexfile + ".a" |
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257 nfile = self.opener.open(tmpname) |
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258 nfile.close() |
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259 self.opener.rename(tmpname, self.indexfile) |
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260 elif self._delaybuf: |
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261 fp = self.opener(self.indexfile, 'a') |
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262 fp.write("".join(self._delaybuf)) |
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263 fp.close() |
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264 self._delaybuf = None |
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265 self._divert = False |
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266 # split when we're done |
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267 self.checkinlinesize(tr) |
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268 |
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269 def readpending(self, file): |
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270 r = revlog.revlog(self.opener, file) |
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271 self.index = r.index |
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272 self.nodemap = r.nodemap |
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273 self._nodecache = r._nodecache |
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274 self._chunkcache = r._chunkcache |
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275 |
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276 def _writepending(self, tr): |
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277 "create a file containing the unfinalized state for pretxnchangegroup" |
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278 if self._delaybuf: |
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279 # make a temporary copy of the index |
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280 fp1 = self._realopener(self.indexfile) |
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281 pendingfilename = self.indexfile + ".a" |
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282 # register as a temp file to ensure cleanup on failure |
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283 tr.registertmp(pendingfilename) |
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284 # write existing data |
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285 fp2 = self._realopener(pendingfilename, "w") |
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286 fp2.write(fp1.read()) |
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287 # add pending data |
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288 fp2.write("".join(self._delaybuf)) |
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289 fp2.close() |
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290 # switch modes so finalize can simply rename |
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291 self._delaybuf = None |
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292 self._divert = True |
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293 self.opener = _divertopener(self._realopener, self.indexfile) |
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294 |
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295 if self._divert: |
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296 return True |
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297 |
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298 return False |
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299 |
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300 def checkinlinesize(self, tr, fp=None): |
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301 if not self._delayed: |
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302 revlog.revlog.checkinlinesize(self, tr, fp) |
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303 |
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304 def read(self, node): |
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305 """ |
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306 format used: |
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307 nodeid\n : manifest node in ascii |
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308 user\n : user, no \n or \r allowed |
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309 time tz extra\n : date (time is int or float, timezone is int) |
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310 : extra is metadata, encoded and separated by '\0' |
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311 : older versions ignore it |
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312 files\n\n : files modified by the cset, no \n or \r allowed |
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313 (.*) : comment (free text, ideally utf-8) |
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314 |
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315 changelog v0 doesn't use extra |
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316 """ |
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317 text = self.revision(node) |
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319 return (nullid, "", (0, 0), [], "", _defaultextra) |
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320 last = text.index("\n\n") |
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321 desc = encoding.tolocal(text[last + 2:]) |
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322 l = text[:last].split('\n') |
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323 manifest = bin(l[0]) |
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324 user = encoding.tolocal(l[1]) |
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325 |
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326 tdata = l[2].split(' ', 2) |
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327 if len(tdata) != 3: |
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328 time = float(tdata[0]) |
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329 try: |
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330 # various tools did silly things with the time zone field. |
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331 timezone = int(tdata[1]) |
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332 except ValueError: |
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333 timezone = 0 |
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334 extra = _defaultextra |
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335 else: |
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336 time, timezone = float(tdata[0]), int(tdata[1]) |
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337 extra = decodeextra(tdata[2]) |
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338 |
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339 files = l[3:] |
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340 return (manifest, user, (time, timezone), files, desc, extra) |
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341 |
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342 def add(self, manifest, files, desc, transaction, p1, p2, |
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343 user, date=None, extra=None): |
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344 # Convert to UTF-8 encoded bytestrings as the very first |
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345 # thing: calling any method on a localstr object will turn it |
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346 # into a str object and the cached UTF-8 string is thus lost. |
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347 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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348 |
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349 user = user.strip() |
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350 # An empty username or a username with a "\n" will make the |
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351 # revision text contain two "\n\n" sequences -> corrupt |
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352 # repository since read cannot unpack the revision. |
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353 if not user: |
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354 raise error.RevlogError(_("empty username")) |
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355 if "\n" in user: |
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357 % repr(user)) | |
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358 |
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359 desc = stripdesc(desc) |
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360 |
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361 if date: |
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362 parseddate = "%d %d" % util.parsedate(date) |
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363 else: |
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364 parseddate = "%d %d" % util.makedate() |
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365 if extra: |
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366 branch = extra.get("branch") |
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367 if branch in ("default", ""): |
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368 del extra["branch"] |
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369 elif branch in (".", "null", "tip"): |
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370 raise error.RevlogError(_('the name \'%s\' is reserved') |
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371 % branch) |
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372 if extra: |
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373 extra = encodeextra(extra) |
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374 parseddate = "%s %s" % (parseddate, extra) |
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375 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
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376 text = "\n".join(l) |
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377 return self.addrevision(text, transaction, len(self), p1, p2) |
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378 |
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379 def branchinfo(self, rev): |
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380 """return the branch name and open/close state of a revision |
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381 |
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382 This function exists because creating a changectx object |
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383 just to access this is costly.""" |
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384 extra = self.read(rev)[5] |
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385 return encoding.tolocal(extra.get("branch")), 'close' in extra |