Mercurial > hg
annotate mercurial/changelog.py @ 20166:7eda5bb9ec8f
parsers: clarify documentation of test-parseindex2.py
This change updates and improves the description of test-parseindex2.py.
In particular, it removes language that can be interpreted to mean that the
test module checks only the C implementation of parsers.parse_index2().
Rather, the module checks parsers.parse_index2(), which can be either the
C or pure Python implementation, depending on which version is being used.
As of e57c532c3835, the module also does more than just compare the return
value with the original Python implementation.
author | Chris Jerdonek <chris.jerdonek@gmail.com> |
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date | Mon, 02 Dec 2013 07:49:49 -0800 |
parents | 8c3dcbbfb5de |
children | 7d4219512823 |
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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 delayopener(opener, target, divert, buf): |
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112 def o(name, mode='r'): |
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113 if name != target: |
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114 return opener(name, mode) |
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115 if divert: |
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116 return opener(name + ".a", mode.replace('a', 'w')) |
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117 # otherwise, divert to memory |
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118 return appender(opener, name, mode, buf) |
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119 return o |
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120 |
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121 class changelog(revlog.revlog): |
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122 def __init__(self, opener): |
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123 revlog.revlog.__init__(self, opener, "00changelog.i") |
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124 if self._initempty: |
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125 # changelogs don't benefit from generaldelta |
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126 self.version &= ~revlog.REVLOGGENERALDELTA |
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127 self._generaldelta = False |
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128 self._realopener = opener |
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129 self._delayed = False |
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130 self._divert = False |
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131 self.filteredrevs = frozenset() |
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132 |
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133 def tip(self): |
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134 """filtered version of revlog.tip""" |
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135 for i in xrange(len(self) -1, -2, -1): |
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136 if i not in self.filteredrevs: |
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137 return self.node(i) |
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138 |
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139 def __iter__(self): |
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140 """filtered version of revlog.__iter__""" |
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141 if len(self.filteredrevs) == 0: |
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142 return revlog.revlog.__iter__(self) |
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143 |
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144 def filterediter(): |
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145 for i in xrange(len(self)): |
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146 if i not in self.filteredrevs: |
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147 yield i |
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148 |
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149 return filterediter() |
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150 |
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151 def revs(self, start=0, stop=None): |
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152 """filtered version of revlog.revs""" |
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153 for i in super(changelog, self).revs(start, stop): |
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154 if i not in self.filteredrevs: |
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155 yield i |
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156 |
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157 @util.propertycache |
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158 def nodemap(self): |
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159 # XXX need filtering too |
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160 self.rev(self.node(0)) |
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161 return self._nodecache |
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162 |
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163 def hasnode(self, node): |
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164 """filtered version of revlog.hasnode""" |
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165 try: |
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166 i = self.rev(node) |
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167 return i not in self.filteredrevs |
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168 except KeyError: |
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169 return False |
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170 |
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171 def headrevs(self): |
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172 if self.filteredrevs: |
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173 # XXX we should fix and use the C version |
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174 return self._headrevs() |
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175 return super(changelog, self).headrevs() |
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176 |
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177 def strip(self, *args, **kwargs): |
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178 # XXX make something better than assert |
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179 # We can't expect proper strip behavior if we are filtered. |
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180 assert not self.filteredrevs |
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181 super(changelog, self).strip(*args, **kwargs) |
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182 |
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183 def rev(self, node): |
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184 """filtered version of revlog.rev""" |
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185 r = super(changelog, self).rev(node) |
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186 if r in self.filteredrevs: |
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187 raise error.LookupError(hex(node), self.indexfile, _('no node')) |
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188 return r |
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189 |
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190 def node(self, rev): |
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191 """filtered version of revlog.node""" |
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192 if rev in self.filteredrevs: |
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193 raise IndexError(rev) |
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194 return super(changelog, self).node(rev) |
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195 |
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196 def linkrev(self, rev): |
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197 """filtered version of revlog.linkrev""" |
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198 if rev in self.filteredrevs: |
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199 raise IndexError(rev) |
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200 return super(changelog, self).linkrev(rev) |
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201 |
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202 def parentrevs(self, rev): |
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203 """filtered version of revlog.parentrevs""" |
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204 if rev in self.filteredrevs: |
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205 raise IndexError(rev) |
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206 return super(changelog, self).parentrevs(rev) |
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207 |
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208 def flags(self, rev): |
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209 """filtered version of revlog.flags""" |
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210 if rev in self.filteredrevs: |
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211 raise IndexError(rev) |
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212 return super(changelog, self).flags(rev) |
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213 |
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214 def delayupdate(self): |
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215 "delay visibility of index updates to other readers" |
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216 self._delayed = True |
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217 self._divert = (len(self) == 0) |
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218 self._delaybuf = [] |
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219 self.opener = delayopener(self._realopener, self.indexfile, |
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220 self._divert, self._delaybuf) |
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221 |
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222 def finalize(self, tr): |
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223 "finalize index updates" |
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224 self._delayed = False |
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225 self.opener = self._realopener |
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226 # move redirected index data back into place |
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227 if self._divert: |
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228 tmpname = self.indexfile + ".a" |
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229 nfile = self.opener.open(tmpname) |
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230 nfile.close() |
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231 self.opener.rename(tmpname, self.indexfile) |
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232 elif self._delaybuf: |
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233 fp = self.opener(self.indexfile, 'a') |
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234 fp.write("".join(self._delaybuf)) |
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235 fp.close() |
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236 self._delaybuf = [] |
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237 # split when we're done |
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238 self.checkinlinesize(tr) |
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239 |
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240 def readpending(self, file): |
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241 r = revlog.revlog(self.opener, file) |
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242 self.index = r.index |
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243 self.nodemap = r.nodemap |
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244 self._nodecache = r._nodecache |
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245 self._chunkcache = r._chunkcache |
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246 |
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247 def writepending(self): |
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248 "create a file containing the unfinalized state for pretxnchangegroup" |
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249 if self._delaybuf: |
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250 # make a temporary copy of the index |
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251 fp1 = self._realopener(self.indexfile) |
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252 fp2 = self._realopener(self.indexfile + ".a", "w") |
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253 fp2.write(fp1.read()) |
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254 # add pending data |
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255 fp2.write("".join(self._delaybuf)) |
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256 fp2.close() |
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257 # switch modes so finalize can simply rename |
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258 self._delaybuf = [] |
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259 self._divert = True |
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260 |
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261 if self._divert: |
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262 return True |
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263 |
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264 return False |
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265 |
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266 def checkinlinesize(self, tr, fp=None): |
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267 if not self._delayed: |
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268 revlog.revlog.checkinlinesize(self, tr, fp) |
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269 |
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270 def read(self, node): |
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271 """ |
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272 format used: |
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273 nodeid\n : manifest node in ascii |
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274 user\n : user, no \n or \r allowed |
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275 time tz extra\n : date (time is int or float, timezone is int) |
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276 : extra is metadata, encoded and separated by '\0' |
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277 : older versions ignore it |
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278 files\n\n : files modified by the cset, no \n or \r allowed |
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279 (.*) : comment (free text, ideally utf-8) |
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280 |
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281 changelog v0 doesn't use extra |
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282 """ |
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283 text = self.revision(node) |
37 | 284 if not text: |
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285 return (nullid, "", (0, 0), [], "", _defaultextra) |
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286 last = text.index("\n\n") |
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287 desc = encoding.tolocal(text[last + 2:]) |
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288 l = text[:last].split('\n') |
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289 manifest = bin(l[0]) |
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290 user = encoding.tolocal(l[1]) |
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291 |
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292 tdata = l[2].split(' ', 2) |
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293 if len(tdata) != 3: |
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294 time = float(tdata[0]) |
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295 try: |
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296 # various tools did silly things with the time zone field. |
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297 timezone = int(tdata[1]) |
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298 except ValueError: |
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299 timezone = 0 |
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300 extra = _defaultextra |
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301 else: |
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302 time, timezone = float(tdata[0]), int(tdata[1]) |
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303 extra = decodeextra(tdata[2]) |
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304 |
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305 files = l[3:] |
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306 return (manifest, user, (time, timezone), files, desc, extra) |
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307 |
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308 def add(self, manifest, files, desc, transaction, p1, p2, |
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309 user, date=None, extra=None): |
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310 # Convert to UTF-8 encoded bytestrings as the very first |
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311 # thing: calling any method on a localstr object will turn it |
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312 # into a str object and the cached UTF-8 string is thus lost. |
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313 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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314 |
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315 user = user.strip() |
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316 # An empty username or a username with a "\n" will make the |
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317 # revision text contain two "\n\n" sequences -> corrupt |
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318 # repository since read cannot unpack the revision. |
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319 if not user: |
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320 raise error.RevlogError(_("empty username")) |
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321 if "\n" in user: |
7633 | 322 raise error.RevlogError(_("username %s contains a newline") |
323 % repr(user)) | |
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324 |
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325 desc = stripdesc(desc) |
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326 |
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327 if date: |
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328 parseddate = "%d %d" % util.parsedate(date) |
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329 else: |
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330 parseddate = "%d %d" % util.makedate() |
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331 if extra: |
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332 branch = extra.get("branch") |
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333 if branch in ("default", ""): |
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Wagner Bruna <wbruna@softwareexpress.com.br>
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334 del extra["branch"] |
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335 elif branch in (".", "null", "tip"): |
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336 raise error.RevlogError(_('the name \'%s\' is reserved') |
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337 % branch) |
3233
2f35961854fb
[extendedchangelog] add extra metadata in the changelog entry
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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338 if extra: |
8443
53ff4a5af284
changelog: turn {de,en}code_extra methods into functions
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339 extra = encodeextra(extra) |
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340 parseddate = "%s %s" % (parseddate, extra) |
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replace util.sort with sorted built-in
Matt Mackall <mpm@selenic.com>
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341 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
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Add back links from file revisions to changeset revisions
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342 text = "\n".join(l) |
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add __len__ and __iter__ methods to repo and revlog
Matt Mackall <mpm@selenic.com>
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343 return self.addrevision(text, transaction, len(self), p1, p2) |
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changelog: add a `branch` method, bypassing changectx
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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344 |
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345 def branch(self, rev): |
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346 """return the branch of a revision |
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347 |
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changelog: please check-code and remove tabs
Mads Kiilerich <mads@kiilerich.com>
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348 This function exists because creating a changectx object |
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349 just to access this is costly.""" |
18306
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350 return encoding.tolocal(self.read(rev)[5].get("branch")) |