Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/context.py @ 3168:05c588e1803d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
context: add __nonzero__ methods
author Matt Mackall <mpm@selenic.com>
date Fri, 29 Sep 2006 17:47:51 -0500
parents ebdb3f616bc0
children 14792adabf80
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1 # context.py - changeset and file context objects for mercurial
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2 #
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3 # Copyright 2006 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
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 from node import *
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9 from demandload import demandload
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10 demandload(globals(), "ancestor util")
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11
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12 class changectx(object):
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13 """A changecontext object makes access to data related to a particular
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14 changeset convenient."""
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15 def __init__(self, repo, changeid=None):
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16 """changeid is a revision number, node, or tag"""
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17 self._repo = repo
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18
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19 if not changeid and changeid != 0:
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20 p1, p2 = self._repo.dirstate.parents()
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21 self._rev = self._repo.changelog.rev(p1)
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22 if self._rev == -1:
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23 changeid = 'tip'
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24 else:
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25 self._node = p1
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26 return
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27
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28 self._node = self._repo.lookup(changeid)
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29 self._rev = self._repo.changelog.rev(self._node)
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30
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31 def __str__(self):
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32 return short(self.node())
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33
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34 def __repr__(self):
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35 return "<changectx %s>" % short(self.node())
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36
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37 def __eq__(self, other):
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38 return self._rev == other._rev
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39
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40 def __nonzero__(self):
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41 return self._rev != -1
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42
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43 def changeset(self):
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44 try:
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45 return self._changeset
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46 except AttributeError:
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47 self._changeset = self._repo.changelog.read(self.node())
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48 return self._changeset
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49
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50 def manifest(self):
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51 try:
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52 return self._manifest
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53 except AttributeError:
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54 self._manifest = self._repo.manifest.read(self.changeset()[0])
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55 return self._manifest
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56
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57 def rev(self): return self._rev
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58 def node(self): return self._node
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59 def user(self): return self.changeset()[1]
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60 def date(self): return self.changeset()[2]
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61 def files(self): return self.changeset()[3]
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62 def description(self): return self.changeset()[4]
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63
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64 def parents(self):
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65 """return contexts for each parent changeset"""
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66 p = self._repo.changelog.parents(self._node)
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67 return [ changectx(self._repo, x) for x in p ]
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68
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69 def children(self):
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70 """return contexts for each child changeset"""
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71 c = self._repo.changelog.children(self._node)
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72 return [ changectx(self._repo, x) for x in c ]
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73
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74 def filenode(self, path):
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75 node, flag = self._repo.manifest.find(self.changeset()[0], path)
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76 return node
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77
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78 def filectx(self, path, fileid=None):
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79 """get a file context from this changeset"""
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80 if fileid is None:
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81 fileid = self.filenode(path)
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82 return filectx(self._repo, path, fileid=fileid)
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83
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84 def filectxs(self):
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85 """generate a file context for each file in this changeset's
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86 manifest"""
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87 mf = self.manifest()
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88 m = mf.keys()
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89 m.sort()
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90 for f in m:
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91 yield self.filectx(f, fileid=mf[f])
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92
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93 def ancestor(self, c2):
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94 """
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95 return the ancestor context of self and c2
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96 """
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97 n = self._repo.changelog.ancestor(self._node, c2._node)
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98 return changectx(self._repo, n)
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99
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100 class filectx(object):
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101 """A filecontext object makes access to data related to a particular
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102 filerevision convenient."""
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103 def __init__(self, repo, path, changeid=None, fileid=None, filelog=None):
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104 """changeid can be a changeset revision, node, or tag.
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105 fileid can be a file revision or node."""
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106 self._repo = repo
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107 self._path = path
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108
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109 assert changeid is not None or fileid is not None
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110
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111 if filelog:
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112 self._filelog = filelog
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113 else:
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114 self._filelog = self._repo.file(self._path)
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115
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116 if fileid is None:
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117 self._changeid = changeid
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118 else:
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119 self._filenode = self._filelog.lookup(fileid)
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120 self._changeid = self._filelog.linkrev(self._filenode)
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121
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122 def __getattr__(self, name):
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123 if name == '_changectx':
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124 self._changectx = changectx(self._repo, self._changeid)
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125 return self._changectx
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126 elif name == '_filenode':
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127 self._filenode = self._changectx.filenode(self._path)
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128 return self._filenode
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129 elif name == '_filerev':
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130 self._filerev = self._filelog.rev(self._filenode)
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131 return self._filerev
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132 else:
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133 raise AttributeError, name
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134
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135 def __nonzero__(self):
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136 return self._filerev != nullid
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137
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138 def __str__(self):
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139 return "%s@%s" % (self.path(), short(self.node()))
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140
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141 def __repr__(self):
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142 return "<filectx %s@%s>" % (self.path(), short(self.node()))
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143
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144 def __eq__(self, other):
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145 return self._path == other._path and self._changeid == other._changeid
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146
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147 def filerev(self): return self._filerev
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148 def filenode(self): return self._filenode
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149 def filelog(self): return self._filelog
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150
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151 def rev(self):
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152 if hasattr(self, "_changectx"):
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153 return self._changectx.rev()
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154 return self._filelog.linkrev(self._filenode)
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155
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156 def node(self): return self._changectx.node()
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157 def user(self): return self._changectx.user()
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158 def date(self): return self._changectx.date()
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159 def files(self): return self._changectx.files()
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160 def description(self): return self._changectx.description()
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161 def manifest(self): return self._changectx.manifest()
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162 def changectx(self): return self._changectx
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163
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164 def data(self): return self._filelog.read(self._filenode)
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165 def renamed(self): return self._filelog.renamed(self._filenode)
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166 def path(self): return self._path
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167
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168 def parents(self):
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169 p = self._path
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170 fl = self._filelog
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171 pl = [ (p, n, fl) for n in self._filelog.parents(self._filenode) ]
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172
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173 r = self.renamed()
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174 if r:
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175 pl[0] = (r[0], r[1], None)
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176
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177 return [ filectx(self._repo, p, fileid=n, filelog=l)
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178 for p,n,l in pl if n != nullid ]
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179
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180 def children(self):
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181 # hard for renames
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182 c = self._filelog.children(self._filenode)
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183 return [ filectx(self._repo, self._path, fileid=x,
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184 filelog=self._filelog) for x in c ]
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185
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186 def annotate(self):
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187 getctx = util.cachefunc(lambda x: filectx(self._repo, self._path,
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188 changeid=x,
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189 filelog=self._filelog))
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190 hist = self._filelog.annotate(self._filenode)
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191
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192 return [(getctx(rev), line) for rev, line in hist]
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193
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194 def ancestor(self, fc2):
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195 """
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196 find the common ancestor file context, if any, of self, and fc2
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197 """
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198
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199 acache = {}
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200 flcache = {self._path:self._filelog, fc2._path:fc2._filelog}
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201 def parents(vertex):
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202 if vertex in acache:
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203 return acache[vertex]
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204 f, n = vertex
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205 if f not in flcache:
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206 flcache[f] = self._repo.file(f)
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207 fl = flcache[f]
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208 pl = [ (f,p) for p in fl.parents(n) if p != nullid ]
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209 re = fl.renamed(n)
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210 if re:
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211 pl.append(re)
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212 acache[vertex]=pl
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213 return pl
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214
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215 a, b = (self._path, self._filenode), (fc2._path, fc2._filenode)
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216 v = ancestor.ancestor(a, b, parents)
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217 if v:
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218 f,n = v
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219 return filectx(self._repo, f, fileid=n, filelog=flcache[f])
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220
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221 return None