Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/context.py @ 3172:5c93dd0ae413

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Refactor annotate copy support.
author Brendan Cully <brendan@kublai.com>
date Wed, 27 Sep 2006 09:10:21 -0700
parents 15d585dcdd1c
children 14792adabf80 0790dce2f3a8
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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 demandload import *
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9 from node import *
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10 demandload(globals(), 'bdiff')
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11
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12 from node import *
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13 from demandload import demandload
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14 demandload(globals(), "ancestor util")
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15
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16 class changectx(object):
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17 """A changecontext object makes access to data related to a particular
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18 changeset convenient."""
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19 def __init__(self, repo, changeid=None):
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20 """changeid is a revision number, node, or tag"""
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21 self._repo = repo
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22
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23 if not changeid and changeid != 0:
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24 p1, p2 = self._repo.dirstate.parents()
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25 self._rev = self._repo.changelog.rev(p1)
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26 if self._rev == -1:
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27 changeid = 'tip'
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28 else:
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29 self._node = p1
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30 return
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31
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32 self._node = self._repo.lookup(changeid)
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33 self._rev = self._repo.changelog.rev(self._node)
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34
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35 def __repr__(self):
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36 return "<changectx %s>" % short(self.node())
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37
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38 def changeset(self):
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39 try:
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40 return self._changeset
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41 except AttributeError:
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42 self._changeset = self._repo.changelog.read(self.node())
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43 return self._changeset
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44
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45 def manifest(self):
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46 try:
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47 return self._manifest
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48 except AttributeError:
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49 self._manifest = self._repo.manifest.read(self.changeset()[0])
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50 return self._manifest
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51
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52 def rev(self): return self._rev
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53 def node(self): return self._node
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54 def user(self): return self.changeset()[1]
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55 def date(self): return self.changeset()[2]
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56 def files(self): return self.changeset()[3]
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57 def description(self): return self.changeset()[4]
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58
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59 def parents(self):
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60 """return contexts for each parent changeset"""
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61 p = self._repo.changelog.parents(self._node)
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62 return [ changectx(self._repo, x) for x in p ]
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63
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64 def children(self):
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65 """return contexts for each child changeset"""
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66 c = self._repo.changelog.children(self._node)
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67 return [ changectx(self._repo, x) for x in c ]
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68
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69 def filenode(self, path):
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70 node, flag = self._repo.manifest.find(self.changeset()[0], path)
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71 return node
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72
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73 def filectx(self, path, fileid=None):
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74 """get a file context from this changeset"""
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75 if fileid is None:
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76 fileid = self.filenode(path)
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77 return filectx(self._repo, path, fileid=fileid)
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78
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79 def filectxs(self):
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80 """generate a file context for each file in this changeset's
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81 manifest"""
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82 mf = self.manifest()
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83 m = mf.keys()
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84 m.sort()
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85 for f in m:
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86 yield self.filectx(f, fileid=mf[f])
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87
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88 def ancestor(self, c2):
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89 """
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90 return the ancestor context of self and c2
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91 """
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92 n = self._repo.changelog.ancestor(self._node, c2._node)
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93 return changectx(self._repo, n)
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94
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95 class filectx(object):
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96 """A filecontext object makes access to data related to a particular
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97 filerevision convenient."""
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98 def __init__(self, repo, path, changeid=None, fileid=None, filelog=None):
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99 """changeid can be a changeset revision, node, or tag.
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100 fileid can be a file revision or node."""
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101 self._repo = repo
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102 self._path = path
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103
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104 assert changeid is not None or fileid is not None
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105
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106 if filelog:
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107 self._filelog = filelog
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108 else:
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109 self._filelog = self._repo.file(self._path)
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110
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111 if fileid is None:
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112 self._changeid = changeid
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113 else:
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114 self._filenode = self._filelog.lookup(fileid)
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115 self._changeid = self._filelog.linkrev(self._filenode)
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116
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117 def __getattr__(self, name):
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118 if name == '_changectx':
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119 self._changectx = changectx(self._repo, self._changeid)
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120 return self._changectx
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121 elif name == '_filenode':
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122 self._filenode = self._changectx.filenode(self._path)
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123 return self._filenode
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124 elif name == '_filerev':
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125 self._filerev = self._filelog.rev(self._filenode)
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126 return self._filerev
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127 else:
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128 raise AttributeError, name
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129
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130 def __repr__(self):
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131 return "<filectx %s@%s>" % (self.path(), short(self.node()))
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132
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133 def filerev(self): return self._filerev
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134 def filenode(self): return self._filenode
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135 def filelog(self): return self._filelog
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136
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137 def rev(self):
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138 if hasattr(self, "_changectx"):
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139 return self._changectx.rev()
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140 return self._filelog.linkrev(self._filenode)
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141
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142 def node(self): return self._changectx.node()
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143 def user(self): return self._changectx.user()
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144 def date(self): return self._changectx.date()
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145 def files(self): return self._changectx.files()
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146 def description(self): return self._changectx.description()
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147 def manifest(self): return self._changectx.manifest()
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148 def changectx(self): return self._changectx
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149
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150 def data(self): return self._filelog.read(self._filenode)
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151 def renamed(self): return self._filelog.renamed(self._filenode)
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152 def path(self): return self._path
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153
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154 def parents(self):
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155 p = self._path
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156 fl = self._filelog
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157 pl = [ (p, n, fl) for n in self._filelog.parents(self._filenode) ]
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158
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159 r = self.renamed()
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160 if r:
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161 pl[0] = (r[0], r[1], None)
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162
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163 return [ filectx(self._repo, p, fileid=n, filelog=l)
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164 for p,n,l in pl if n != nullid ]
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165
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166 def children(self):
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167 # hard for renames
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168 c = self._filelog.children(self._filenode)
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169 return [ filectx(self._repo, self._path, fileid=x,
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170 filelog=self._filelog) for x in c ]
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171
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172 def annotate(self, follow=False):
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173 '''returns a list of tuples of (ctx, line) for each line
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174 in the file, where ctx is the filectx of the node where
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175 that line was last changed'''
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176
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177 def decorate(text, rev):
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178 return ([rev] * len(text.splitlines()), text)
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179
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180 def pair(parent, child):
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181 for a1, a2, b1, b2 in bdiff.blocks(parent[1], child[1]):
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182 child[0][b1:b2] = parent[0][a1:a2]
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183 return child
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184
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185 getlog = util.cachefunc(lambda x: self._repo.file(x))
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186 def getctx(path, fileid):
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187 log = path == self._path and self._filelog or getlog(path)
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188 return filectx(self._repo, path, fileid=fileid, filelog=log)
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189 getctx = util.cachefunc(getctx)
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190
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191 def parents(f):
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192 # we want to reuse filectx objects as much as possible
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193 p = f._path
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194 pl = [ (p, f._filelog.rev(n)) for n in f._filelog.parents(f._filenode) ]
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195
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196 if follow:
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197 r = f.renamed()
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198 if r:
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199 pl[0] = (r[0], getlog(r[0]).rev(r[1]))
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200
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201 return [ getctx(p, n) for p, n in pl if n != -1 ]
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202
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203 # find all ancestors
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204 needed = {self: 1}
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205 visit = [self]
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206 files = [self._path]
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207 while visit:
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208 f = visit.pop(0)
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209 for p in parents(f):
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210 if p not in needed:
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211 needed[p] = 1
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212 visit.append(p)
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213 if p._path not in files:
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214 files.append(p._path)
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215 else:
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216 # count how many times we'll use this
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217 needed[p] += 1
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218
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219 # sort by revision (per file) which is a topological order
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220 visit = []
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221 files.reverse()
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222 for f in files:
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223 fn = [(n._filerev, n) for n in needed.keys() if n._path == f]
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224 fn.sort()
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225 visit.extend(fn)
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226 hist = {}
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227
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228 for r, f in visit:
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229 curr = decorate(f.data(), f)
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230 for p in parents(f):
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231 if p != nullid:
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232 curr = pair(hist[p], curr)
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233 # trim the history of unneeded revs
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234 needed[p] -= 1
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235 if not needed[p]:
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236 del hist[p]
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237 hist[f] = curr
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238
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239 return zip(hist[f][0], hist[f][1].splitlines(1))
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240
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241 def ancestor(self, fc2):
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242 """
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243 find the common ancestor file context, if any, of self, and fc2
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244 """
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245
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246 acache = {}
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247 flcache = {self._path:self._filelog, fc2._path:fc2._filelog}
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248 def parents(vertex):
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249 if vertex in acache:
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250 return acache[vertex]
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251 f, n = vertex
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252 if f not in flcache:
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253 flcache[f] = self._repo.file(f)
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254 fl = flcache[f]
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255 pl = [ (f,p) for p in fl.parents(n) if p != nullid ]
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256 re = fl.renamed(n)
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257 if re:
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258 pl.append(re)
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259 acache[vertex]=pl
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260 return pl
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261
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262 a, b = (self._path, self._filenode), (fc2._path, fc2._filenode)
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263 v = ancestor.ancestor(a, b, parents)
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264 if v:
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265 f,n = v
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266 return filectx(self._repo, f, fileid=n, filelog=flcache[f])
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267
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268 return None