Mercurial > hg
annotate mercurial/changelog.py @ 19093:6f27efc7db23 stable
hgweb: fix empty navigation detection
For some obscure reason, changelog.node(0) returns nullid if changelog is empty.
this break empty navigation detection. We fix this code by using the length of
the changelog.
Using the length have some issue with revision filtering but this is a small
step in the right direction. Proper fix comes in later changeset.
author | Pierre-Yves David <pierre-yves.david@logilab.fr> |
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date | Tue, 30 Apr 2013 15:11:12 +0200 |
parents | cbf5f3eb9d13 |
children | 3f92e749d381 |
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, fp, buf): |
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63 self.data = buf |
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64 self.fp = fp |
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65 self.offset = fp.tell() |
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66 self.size = util.fstat(fp).st_size |
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67 |
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68 def end(self): |
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69 return self.size + len("".join(self.data)) |
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70 def tell(self): |
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71 return self.offset |
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72 def flush(self): |
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73 pass |
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74 def close(self): |
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75 self.fp.close() |
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76 |
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77 def seek(self, offset, whence=0): |
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78 '''virtual file offset spans real file and data''' |
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79 if whence == 0: |
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80 self.offset = offset |
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81 elif whence == 1: |
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82 self.offset += offset |
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83 elif whence == 2: |
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84 self.offset = self.end() + offset |
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85 if self.offset < self.size: |
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86 self.fp.seek(self.offset) |
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87 |
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88 def read(self, count=-1): |
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89 '''only trick here is reads that span real file and data''' |
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90 ret = "" |
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91 if self.offset < self.size: |
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92 s = self.fp.read(count) |
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93 ret = s |
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94 self.offset += len(s) |
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95 if count > 0: |
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96 count -= len(s) |
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97 if count != 0: |
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98 doff = self.offset - self.size |
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99 self.data.insert(0, "".join(self.data)) |
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100 del self.data[1:] |
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101 s = self.data[0][doff:doff + count] |
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102 self.offset += len(s) |
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103 ret += s |
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104 return ret |
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105 |
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106 def write(self, s): |
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107 self.data.append(str(s)) |
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108 self.offset += len(s) |
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109 |
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110 def delayopener(opener, target, divert, buf): |
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111 def o(name, mode='r'): |
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112 if name != target: |
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113 return opener(name, mode) |
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114 if divert: |
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115 return opener(name + ".a", mode.replace('a', 'w')) |
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116 # otherwise, divert to memory |
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117 return appender(opener(name, mode), buf) |
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118 return o |
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119 |
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120 class changelog(revlog.revlog): |
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121 def __init__(self, opener): |
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122 revlog.revlog.__init__(self, opener, "00changelog.i") |
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123 if self._initempty: |
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124 # changelogs don't benefit from generaldelta |
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125 self.version &= ~revlog.REVLOGGENERALDELTA |
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126 self._generaldelta = False |
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127 self._realopener = opener |
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128 self._delayed = False |
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129 self._divert = False |
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130 self.filteredrevs = frozenset() |
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131 |
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132 def tip(self): |
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133 """filtered version of revlog.tip""" |
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134 for i in xrange(len(self) -1, -2, -1): |
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135 if i not in self.filteredrevs: |
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136 return self.node(i) |
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137 |
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138 def __iter__(self): |
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139 """filtered version of revlog.__iter__""" |
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140 if len(self.filteredrevs) == 0: |
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141 return revlog.revlog.__iter__(self) |
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142 |
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143 def filterediter(): |
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144 for i in xrange(len(self)): |
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145 if i not in self.filteredrevs: |
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146 yield i |
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147 |
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148 return filterediter() |
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149 |
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150 def revs(self, start=0, stop=None): |
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151 """filtered version of revlog.revs""" |
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152 for i in super(changelog, self).revs(start, stop): |
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153 if i not in self.filteredrevs: |
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154 yield i |
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155 |
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156 @util.propertycache |
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157 def nodemap(self): |
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158 # XXX need filtering too |
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159 self.rev(self.node(0)) |
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160 return self._nodecache |
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161 |
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162 def hasnode(self, node): |
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163 """filtered version of revlog.hasnode""" |
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164 try: |
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165 i = self.rev(node) |
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166 return i not in self.filteredrevs |
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167 except KeyError: |
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168 return False |
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169 |
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170 def headrevs(self): |
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171 if self.filteredrevs: |
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172 # XXX we should fix and use the C version |
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173 return self._headrevs() |
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174 return super(changelog, self).headrevs() |
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175 |
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176 def strip(self, *args, **kwargs): |
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177 # XXX make something better than assert |
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178 # We can't expect proper strip behavior if we are filtered. |
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179 assert not self.filteredrevs |
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180 super(changelog, self).strip(*args, **kwargs) |
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181 |
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182 def rev(self, node): |
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183 """filtered version of revlog.rev""" |
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184 r = super(changelog, self).rev(node) |
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185 if r in self.filteredrevs: |
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186 raise error.LookupError(hex(node), self.indexfile, _('no node')) |
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187 return r |
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188 |
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189 def node(self, rev): |
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190 """filtered version of revlog.node""" |
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191 if rev in self.filteredrevs: |
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192 raise IndexError(rev) |
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193 return super(changelog, self).node(rev) |
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194 |
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195 def linkrev(self, rev): |
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196 """filtered version of revlog.linkrev""" |
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197 if rev in self.filteredrevs: |
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198 raise IndexError(rev) |
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199 return super(changelog, self).linkrev(rev) |
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200 |
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201 def parentrevs(self, rev): |
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202 """filtered version of revlog.parentrevs""" |
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203 if rev in self.filteredrevs: |
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204 raise IndexError(rev) |
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205 return super(changelog, self).parentrevs(rev) |
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206 |
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207 def flags(self, rev): |
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208 """filtered version of revlog.flags""" |
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209 if rev in self.filteredrevs: |
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210 raise IndexError(rev) |
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211 return super(changelog, self).flags(rev) |
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212 |
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213 def delayupdate(self): |
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214 "delay visibility of index updates to other readers" |
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215 self._delayed = True |
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216 self._divert = (len(self) == 0) |
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217 self._delaybuf = [] |
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218 self.opener = delayopener(self._realopener, self.indexfile, |
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219 self._divert, self._delaybuf) |
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220 |
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221 def finalize(self, tr): |
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222 "finalize index updates" |
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223 self._delayed = False |
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224 self.opener = self._realopener |
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225 # move redirected index data back into place |
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226 if self._divert: |
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227 nfile = self.opener(self.indexfile + ".a") |
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228 n = nfile.name |
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229 nfile.close() |
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230 util.rename(n, n[:-2]) |
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231 elif self._delaybuf: |
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232 fp = self.opener(self.indexfile, 'a') |
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233 fp.write("".join(self._delaybuf)) |
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234 fp.close() |
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235 self._delaybuf = [] |
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236 # split when we're done |
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237 self.checkinlinesize(tr) |
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238 |
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239 def readpending(self, file): |
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240 r = revlog.revlog(self.opener, file) |
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241 self.index = r.index |
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242 self.nodemap = r.nodemap |
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243 self._nodecache = r._nodecache |
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244 self._chunkcache = r._chunkcache |
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245 |
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246 def writepending(self): |
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247 "create a file containing the unfinalized state for pretxnchangegroup" |
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248 if self._delaybuf: |
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249 # make a temporary copy of the index |
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250 fp1 = self._realopener(self.indexfile) |
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251 fp2 = self._realopener(self.indexfile + ".a", "w") |
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252 fp2.write(fp1.read()) |
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253 # add pending data |
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254 fp2.write("".join(self._delaybuf)) |
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255 fp2.close() |
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256 # switch modes so finalize can simply rename |
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257 self._delaybuf = [] |
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258 self._divert = True |
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259 |
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260 if self._divert: |
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261 return True |
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262 |
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263 return False |
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264 |
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265 def checkinlinesize(self, tr, fp=None): |
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266 if not self._delayed: |
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267 revlog.revlog.checkinlinesize(self, tr, fp) |
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268 |
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269 def read(self, node): |
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270 """ |
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271 format used: |
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272 nodeid\n : manifest node in ascii |
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273 user\n : user, no \n or \r allowed |
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274 time tz extra\n : date (time is int or float, timezone is int) |
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275 : extra is metadata, encoded and separated by '\0' |
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276 : older versions ignore it |
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277 files\n\n : files modified by the cset, no \n or \r allowed |
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278 (.*) : comment (free text, ideally utf-8) |
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279 |
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280 changelog v0 doesn't use extra |
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281 """ |
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282 text = self.revision(node) |
37 | 283 if not text: |
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284 return (nullid, "", (0, 0), [], "", _defaultextra) |
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285 last = text.index("\n\n") |
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286 desc = encoding.tolocal(text[last + 2:]) |
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287 l = text[:last].split('\n') |
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288 manifest = bin(l[0]) |
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289 user = encoding.tolocal(l[1]) |
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290 |
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291 tdata = l[2].split(' ', 2) |
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292 if len(tdata) != 3: |
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293 time = float(tdata[0]) |
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294 try: |
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295 # various tools did silly things with the time zone field. |
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296 timezone = int(tdata[1]) |
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297 except ValueError: |
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298 timezone = 0 |
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299 extra = _defaultextra |
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300 else: |
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301 time, timezone = float(tdata[0]), int(tdata[1]) |
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302 extra = decodeextra(tdata[2]) |
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303 |
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304 files = l[3:] |
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305 return (manifest, user, (time, timezone), files, desc, extra) |
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306 |
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307 def add(self, manifest, files, desc, transaction, p1, p2, |
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308 user, date=None, extra=None): |
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309 # Convert to UTF-8 encoded bytestrings as the very first |
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310 # thing: calling any method on a localstr object will turn it |
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311 # into a str object and the cached UTF-8 string is thus lost. |
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312 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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313 |
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314 user = user.strip() |
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315 # An empty username or a username with a "\n" will make the |
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316 # revision text contain two "\n\n" sequences -> corrupt |
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317 # repository since read cannot unpack the revision. |
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318 if not user: |
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319 raise error.RevlogError(_("empty username")) |
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320 if "\n" in user: |
7633 | 321 raise error.RevlogError(_("username %s contains a newline") |
322 % repr(user)) | |
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323 |
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324 desc = stripdesc(desc) |
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325 |
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326 if date: |
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327 parseddate = "%d %d" % util.parsedate(date) |
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328 else: |
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329 parseddate = "%d %d" % util.makedate() |
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330 if extra: |
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331 branch = extra.get("branch") |
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332 if branch in ("default", ""): |
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333 del extra["branch"] |
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334 elif branch in (".", "null", "tip"): |
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|
335 raise error.RevlogError(_('the name \'%s\' is reserved') |
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|
336 % branch) |
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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3232
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337 if extra: |
8443
53ff4a5af284
changelog: turn {de,en}code_extra methods into functions
Martin Geisler <mg@lazybytes.net>
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8442
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338 extra = encodeextra(extra) |
3233
2f35961854fb
[extendedchangelog] add extra metadata in the changelog entry
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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3232
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339 parseddate = "%s %s" % (parseddate, extra) |
8209
a1a5a57efe90
replace util.sort with sorted built-in
Matt Mackall <mpm@selenic.com>
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7948
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340 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
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341 text = "\n".join(l) |
6750
fb42030d79d6
add __len__ and __iter__ methods to repo and revlog
Matt Mackall <mpm@selenic.com>
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342 return self.addrevision(text, transaction, len(self), p1, p2) |
18306
06185554e7e3
changelog: add a `branch` method, bypassing changectx
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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18231
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343 |
06185554e7e3
changelog: add a `branch` method, bypassing changectx
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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344 def branch(self, rev): |
06185554e7e3
changelog: add a `branch` method, bypassing changectx
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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345 """return the branch of a revision |
06185554e7e3
changelog: add a `branch` method, bypassing changectx
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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18231
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346 |
18308
4e27b06a0fd9
changelog: please check-code and remove tabs
Mads Kiilerich <mads@kiilerich.com>
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18306
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347 This function exists because creating a changectx object |
4e27b06a0fd9
changelog: please check-code and remove tabs
Mads Kiilerich <mads@kiilerich.com>
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18306
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348 just to access this is costly.""" |
18306
06185554e7e3
changelog: add a `branch` method, bypassing changectx
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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18231
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349 return encoding.tolocal(self.read(rev)[5].get("branch")) |