Mercurial > hg
annotate mercurial/changelog.py @ 20835:0e8417131a29
util: add the code path to "cachefunc()" for the function taking no arguments
Before this patch, "util.cachefunc()" caches the value returned by the
specified function into dictionary "cache", even if the specified
function takes no arguments.
In such case, "cache" has at most one entry, and distinction between
entries in "cache" is meaningless.
This patch adds the code path to "cachefunc()" for the function taking
no arguments for efficiency: to store only one cached value, using
list "cache" is a little faster than using dictionary "cache".
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Sat, 15 Feb 2014 19:52:26 +0900 |
parents | 7d4219512823 |
children | 667df8f478d1 |
rev | line source |
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1095 | 1 # changelog.py - changelog class for mercurial |
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2 # |
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Updated copyright notices and add "and others" to "hg version"
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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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forbid username with '\n' at the changelog level
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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
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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 |
20185
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branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
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345 def branchinfo(self, rev): |
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346 """return the branch name and open/close state 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.""" |
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Brodie Rao <brodie@sf.io>
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350 extra = self.read(rev)[5] |
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351 return encoding.tolocal(extra.get("branch")), 'close' in extra |