Mercurial > hg
annotate hgext/convert/filemap.py @ 26036:db677b70a298
convert: implements targetfilebelongstosource for filemap source
This is an implementation of the new targetfilebelongstosource() function for
the filemapper. It simply checks if the given file name is prefixed by any of
the rename destinations.
It is not a perfect implementation since it doesn't account for the filemap
specifying includes or excludes, but that makes the problem much harder, and
this implementation should suffice for most cases.
author | Durham Goode <durham@fb.com> |
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date | Sat, 15 Aug 2015 13:46:30 -0700 |
parents | d859123e0f47 |
children | 56b2bcea2529 |
rev | line source |
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1 # Copyright 2007 Bryan O'Sullivan <bos@serpentine.com> |
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2 # Copyright 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br> |
316 | 3 # |
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4 # This software may be used and distributed according to the terms of the |
10263 | 5 # GNU General Public License version 2 or any later version. |
316 | 6 |
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7 import posixpath |
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8 import shlex |
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9 from mercurial.i18n import _ |
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10 from mercurial import util, error |
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11 from common import SKIPREV, converter_source |
694 | 12 |
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13 def rpairs(path): |
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14 '''Yield tuples with path split at '/', starting with the full path. |
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15 No leading, trailing or double '/', please. |
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16 >>> for x in rpairs('foo/bar/baz'): print x |
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17 ('foo/bar/baz', '') |
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18 ('foo/bar', 'baz') |
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19 ('foo', 'bar/baz') |
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20 ('.', 'foo/bar/baz') |
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21 ''' |
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22 i = len(path) |
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23 while i != -1: |
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24 yield path[:i], path[i + 1:] |
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25 i = path.rfind('/', 0, i) |
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26 yield '.', path |
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27 |
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28 def normalize(path): |
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29 ''' We use posixpath.normpath to support cross-platform path format. |
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30 However, it doesn't handle None input. So we wrap it up. ''' |
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31 if path is None: |
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32 return None |
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33 return posixpath.normpath(path) |
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34 |
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35 class filemapper(object): |
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36 '''Map and filter filenames when importing. |
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37 A name can be mapped to itself, a new name, or None (omit from new |
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38 repository).''' |
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39 |
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40 def __init__(self, ui, path=None): |
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41 self.ui = ui |
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42 self.include = {} |
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43 self.exclude = {} |
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44 self.rename = {} |
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45 self.targetprefixes = None |
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46 if path: |
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47 if self.parse(path): |
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48 raise util.Abort(_('errors in filemap')) |
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49 |
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50 def parse(self, path): |
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51 errs = 0 |
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52 def check(name, mapping, listname): |
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53 if not name: |
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54 self.ui.warn(_('%s:%d: path to %s is missing\n') % |
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55 (lex.infile, lex.lineno, listname)) |
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56 return 1 |
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57 if name in mapping: |
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58 self.ui.warn(_('%s:%d: %r already in %s list\n') % |
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59 (lex.infile, lex.lineno, name, listname)) |
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60 return 1 |
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61 if (name.startswith('/') or |
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62 name.endswith('/') or |
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63 '//' in name): |
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64 self.ui.warn(_('%s:%d: superfluous / in %s %r\n') % |
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65 (lex.infile, lex.lineno, listname, name)) |
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66 return 1 |
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67 return 0 |
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68 lex = shlex.shlex(open(path), path, True) |
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69 lex.wordchars += '!@#$%^&*()-=+[]{}|;:,./<>?' |
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70 cmd = lex.get_token() |
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71 while cmd: |
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72 if cmd == 'include': |
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73 name = normalize(lex.get_token()) |
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74 errs += check(name, self.exclude, 'exclude') |
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75 self.include[name] = name |
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76 elif cmd == 'exclude': |
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77 name = normalize(lex.get_token()) |
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78 errs += check(name, self.include, 'include') |
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79 errs += check(name, self.rename, 'rename') |
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80 self.exclude[name] = name |
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81 elif cmd == 'rename': |
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82 src = normalize(lex.get_token()) |
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83 dest = normalize(lex.get_token()) |
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84 errs += check(src, self.exclude, 'exclude') |
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85 self.rename[src] = dest |
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86 elif cmd == 'source': |
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87 errs += self.parse(normalize(lex.get_token())) |
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88 else: |
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89 self.ui.warn(_('%s:%d: unknown directive %r\n') % |
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90 (lex.infile, lex.lineno, cmd)) |
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91 errs += 1 |
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92 cmd = lex.get_token() |
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93 return errs |
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94 |
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95 def lookup(self, name, mapping): |
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96 name = normalize(name) |
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97 for pre, suf in rpairs(name): |
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98 try: |
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99 return mapping[pre], pre, suf |
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100 except KeyError: |
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101 pass |
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102 return '', name, '' |
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103 |
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104 def istargetfile(self, filename): |
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105 """Return true if the given target filename is covered as a destination |
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106 of the filemap. This is useful for identifying what parts of the target |
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107 repo belong to the source repo and what parts don't.""" |
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108 if self.targetprefixes is None: |
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109 self.targetprefixes = set() |
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110 for before, after in self.rename.iteritems(): |
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111 self.targetprefixes.add(after) |
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112 |
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113 # If "." is a target, then all target files are considered from the |
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114 # source. |
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115 if not self.targetprefixes or '.' in self.targetprefixes: |
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116 return True |
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117 |
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118 filename = normalize(filename) |
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119 for pre, suf in rpairs(filename): |
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120 # This check is imperfect since it doesn't account for the |
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121 # include/exclude list, but it should work in filemaps that don't |
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122 # apply include/exclude to the same source directories they are |
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123 # renaming. |
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124 if pre in self.targetprefixes: |
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125 return True |
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126 return False |
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127 |
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128 def __call__(self, name): |
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129 if self.include: |
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130 inc = self.lookup(name, self.include)[0] |
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131 else: |
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132 inc = name |
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133 if self.exclude: |
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134 exc = self.lookup(name, self.exclude)[0] |
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135 else: |
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136 exc = '' |
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137 if (not self.include and exc) or (len(inc) <= len(exc)): |
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138 return None |
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139 newpre, pre, suf = self.lookup(name, self.rename) |
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140 if newpre: |
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141 if newpre == '.': |
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142 return suf |
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143 if suf: |
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144 if newpre.endswith('/'): |
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145 return newpre + suf |
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146 return newpre + '/' + suf |
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147 return newpre |
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148 return name |
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149 |
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150 def active(self): |
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151 return bool(self.include or self.exclude or self.rename) |
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152 |
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153 # This class does two additional things compared to a regular source: |
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154 # |
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155 # - Filter and rename files. This is mostly wrapped by the filemapper |
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156 # class above. We hide the original filename in the revision that is |
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157 # returned by getchanges to be able to find things later in getfile. |
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158 # |
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159 # - Return only revisions that matter for the files we're interested in. |
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160 # This involves rewriting the parents of the original revision to |
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161 # create a graph that is restricted to those revisions. |
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162 # |
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163 # This set of revisions includes not only revisions that directly |
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164 # touch files we're interested in, but also merges that merge two |
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165 # or more interesting revisions. |
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166 |
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167 class filemap_source(converter_source): |
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168 def __init__(self, ui, baseconverter, filemap): |
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169 super(filemap_source, self).__init__(ui) |
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170 self.base = baseconverter |
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171 self.filemapper = filemapper(ui, filemap) |
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172 self.commits = {} |
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173 # if a revision rev has parent p in the original revision graph, then |
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174 # rev will have parent self.parentmap[p] in the restricted graph. |
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175 self.parentmap = {} |
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176 # self.wantedancestors[rev] is the set of all ancestors of rev that |
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177 # are in the restricted graph. |
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178 self.wantedancestors = {} |
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179 self.convertedorder = None |
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180 self._rebuilt = False |
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181 self.origparents = {} |
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182 self.children = {} |
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183 self.seenchildren = {} |
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184 # experimental config: convert.ignoreancestorcheck |
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185 self.ignoreancestorcheck = self.ui.configbool('convert', |
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186 'ignoreancestorcheck') |
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187 |
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188 def before(self): |
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189 self.base.before() |
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190 |
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191 def after(self): |
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192 self.base.after() |
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193 |
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194 def setrevmap(self, revmap): |
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195 # rebuild our state to make things restartable |
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196 # |
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197 # To avoid calling getcommit for every revision that has already |
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198 # been converted, we rebuild only the parentmap, delaying the |
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199 # rebuild of wantedancestors until we need it (i.e. until a |
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200 # merge). |
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201 # |
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202 # We assume the order argument lists the revisions in |
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203 # topological order, so that we can infer which revisions were |
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204 # wanted by previous runs. |
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205 self._rebuilt = not revmap |
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206 seen = {SKIPREV: SKIPREV} |
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207 dummyset = set() |
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208 converted = [] |
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209 for rev in revmap.order: |
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210 mapped = revmap[rev] |
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211 wanted = mapped not in seen |
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212 if wanted: |
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213 seen[mapped] = rev |
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214 self.parentmap[rev] = rev |
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215 else: |
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216 self.parentmap[rev] = seen[mapped] |
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217 self.wantedancestors[rev] = dummyset |
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218 arg = seen[mapped] |
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219 if arg == SKIPREV: |
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220 arg = None |
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221 converted.append((rev, wanted, arg)) |
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222 self.convertedorder = converted |
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223 return self.base.setrevmap(revmap) |
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224 |
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225 def rebuild(self): |
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226 if self._rebuilt: |
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227 return True |
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228 self._rebuilt = True |
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229 self.parentmap.clear() |
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230 self.wantedancestors.clear() |
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231 self.seenchildren.clear() |
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232 for rev, wanted, arg in self.convertedorder: |
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233 if rev not in self.origparents: |
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234 try: |
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235 self.origparents[rev] = self.getcommit(rev).parents |
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236 except error.RepoLookupError: |
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237 self.ui.debug("unknown revmap source: %s\n" % rev) |
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238 continue |
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239 if arg is not None: |
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240 self.children[arg] = self.children.get(arg, 0) + 1 |
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241 |
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242 for rev, wanted, arg in self.convertedorder: |
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243 try: |
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244 parents = self.origparents[rev] |
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245 except KeyError: |
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246 continue # unknown revmap source |
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247 if wanted: |
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248 self.mark_wanted(rev, parents) |
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249 else: |
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250 self.mark_not_wanted(rev, arg) |
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251 self._discard(arg, *parents) |
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252 |
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253 return True |
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254 |
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255 def getheads(self): |
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256 return self.base.getheads() |
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257 |
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258 def getcommit(self, rev): |
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259 # We want to save a reference to the commit objects to be able |
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260 # to rewrite their parents later on. |
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261 c = self.commits[rev] = self.base.getcommit(rev) |
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262 for p in c.parents: |
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263 self.children[p] = self.children.get(p, 0) + 1 |
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264 return c |
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265 |
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266 def _cachedcommit(self, rev): |
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267 if rev in self.commits: |
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268 return self.commits[rev] |
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269 return self.base.getcommit(rev) |
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270 |
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271 def _discard(self, *revs): |
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272 for r in revs: |
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273 if r is None: |
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274 continue |
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275 self.seenchildren[r] = self.seenchildren.get(r, 0) + 1 |
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276 if self.seenchildren[r] == self.children[r]: |
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277 self.wantedancestors.pop(r, None) |
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278 self.parentmap.pop(r, None) |
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279 del self.seenchildren[r] |
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280 if self._rebuilt: |
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281 del self.children[r] |
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282 |
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283 def wanted(self, rev, i): |
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284 # Return True if we're directly interested in rev. |
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285 # |
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286 # i is an index selecting one of the parents of rev (if rev |
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287 # has no parents, i is None). getchangedfiles will give us |
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288 # the list of files that are different in rev and in the parent |
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289 # indicated by i. If we're interested in any of these files, |
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290 # we're interested in rev. |
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291 try: |
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292 files = self.base.getchangedfiles(rev, i) |
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293 except NotImplementedError: |
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294 raise util.Abort(_("source repository doesn't support --filemap")) |
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295 for f in files: |
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296 if self.filemapper(f): |
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297 return True |
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298 return False |
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299 |
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300 def mark_not_wanted(self, rev, p): |
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301 # Mark rev as not interesting and update data structures. |
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302 |
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303 if p is None: |
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304 # A root revision. Use SKIPREV to indicate that it doesn't |
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305 # map to any revision in the restricted graph. Put SKIPREV |
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306 # in the set of wanted ancestors to simplify code elsewhere |
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307 self.parentmap[rev] = SKIPREV |
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308 self.wantedancestors[rev] = set((SKIPREV,)) |
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309 return |
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310 |
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311 # Reuse the data from our parent. |
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312 self.parentmap[rev] = self.parentmap[p] |
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313 self.wantedancestors[rev] = self.wantedancestors[p] |
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314 |
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315 def mark_wanted(self, rev, parents): |
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316 # Mark rev ss wanted and update data structures. |
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317 |
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318 # rev will be in the restricted graph, so children of rev in |
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319 # the original graph should still have rev as a parent in the |
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320 # restricted graph. |
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321 self.parentmap[rev] = rev |
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322 |
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323 # The set of wanted ancestors of rev is the union of the sets |
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324 # of wanted ancestors of its parents. Plus rev itself. |
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325 wrev = set() |
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326 for p in parents: |
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327 if p in self.wantedancestors: |
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328 wrev.update(self.wantedancestors[p]) |
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329 else: |
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330 self.ui.warn(_('warning: %s parent %s is missing\n') % |
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331 (rev, p)) |
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332 wrev.add(rev) |
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333 self.wantedancestors[rev] = wrev |
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334 |
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335 def getchanges(self, rev, full): |
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336 parents = self.commits[rev].parents |
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337 if len(parents) > 1 and not self.ignoreancestorcheck: |
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338 self.rebuild() |
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339 |
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340 # To decide whether we're interested in rev we: |
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341 # |
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342 # - calculate what parents rev will have if it turns out we're |
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343 # interested in it. If it's going to have more than 1 parent, |
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344 # we're interested in it. |
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345 # |
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346 # - otherwise, we'll compare it with the single parent we found. |
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347 # If any of the files we're interested in is different in the |
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348 # the two revisions, we're interested in rev. |
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349 |
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350 # A parent p is interesting if its mapped version (self.parentmap[p]): |
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351 # - is not SKIPREV |
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352 # - is still not in the list of parents (we don't want duplicates) |
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353 # - is not an ancestor of the mapped versions of the other parents or |
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354 # there is no parent in the same branch than the current revision. |
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355 mparents = [] |
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356 knownparents = set() |
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357 branch = self.commits[rev].branch |
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358 hasbranchparent = False |
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359 for i, p1 in enumerate(parents): |
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360 mp1 = self.parentmap[p1] |
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361 if mp1 == SKIPREV or mp1 in knownparents: |
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362 continue |
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363 |
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364 isancestor = (not self.ignoreancestorcheck and |
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365 any(p2 for p2 in parents |
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366 if p1 != p2 and mp1 != self.parentmap[p2] |
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367 and mp1 in self.wantedancestors[p2])) |
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368 if not isancestor and not hasbranchparent and len(parents) > 1: |
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369 # This could be expensive, avoid unnecessary calls. |
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370 if self._cachedcommit(p1).branch == branch: |
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371 hasbranchparent = True |
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372 mparents.append((p1, mp1, i, isancestor)) |
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373 knownparents.add(mp1) |
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374 # Discard parents ancestors of other parents if there is a |
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375 # non-ancestor one on the same branch than current revision. |
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376 if hasbranchparent: |
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377 mparents = [p for p in mparents if not p[3]] |
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378 wp = None |
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379 if mparents: |
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380 wp = max(p[2] for p in mparents) |
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381 mparents = [p[1] for p in mparents] |
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382 elif parents: |
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383 wp = 0 |
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384 |
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385 self.origparents[rev] = parents |
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386 |
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387 closed = False |
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388 if 'close' in self.commits[rev].extra: |
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389 # A branch closing revision is only useful if one of its |
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390 # parents belong to the branch being closed |
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391 pbranches = [self._cachedcommit(p).branch for p in mparents] |
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392 if branch in pbranches: |
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393 closed = True |
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394 |
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395 if len(mparents) < 2 and not closed and not self.wanted(rev, wp): |
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396 # We don't want this revision. |
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397 # Update our state and tell the convert process to map this |
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398 # revision to the same revision its parent as mapped to. |
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399 p = None |
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400 if parents: |
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401 p = parents[wp] |
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402 self.mark_not_wanted(rev, p) |
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403 self.convertedorder.append((rev, False, p)) |
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404 self._discard(*parents) |
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405 return self.parentmap[rev] |
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406 |
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407 # We want this revision. |
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408 # Rewrite the parents of the commit object |
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409 self.commits[rev].parents = mparents |
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410 self.mark_wanted(rev, parents) |
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411 self.convertedorder.append((rev, True, None)) |
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412 self._discard(*parents) |
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413 |
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414 # Get the real changes and do the filtering/mapping. To be |
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415 # able to get the files later on in getfile, we hide the |
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416 # original filename in the rev part of the return value. |
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417 changes, copies, cleanp2 = self.base.getchanges(rev, full) |
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418 files = {} |
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419 ncleanp2 = set(cleanp2) |
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420 for f, r in changes: |
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421 newf = self.filemapper(f) |
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422 if newf and (newf != f or newf not in files): |
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423 files[newf] = (f, r) |
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424 if newf != f: |
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425 ncleanp2.discard(f) |
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426 files = sorted(files.items()) |
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427 |
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428 ncopies = {} |
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429 for c in copies: |
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430 newc = self.filemapper(c) |
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431 if newc: |
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432 newsource = self.filemapper(copies[c]) |
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433 if newsource: |
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434 ncopies[newc] = newsource |
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435 |
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436 return files, ncopies, ncleanp2 |
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437 |
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438 def targetfilebelongstosource(self, targetfilename): |
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439 return self.filemapper.istargetfile(targetfilename) |
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440 |
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441 def getfile(self, name, rev): |
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442 realname, realrev = rev |
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443 return self.base.getfile(realname, realrev) |
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444 |
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445 def gettags(self): |
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446 return self.base.gettags() |
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447 |
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448 def hasnativeorder(self): |
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449 return self.base.hasnativeorder() |
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450 |
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451 def lookuprev(self, rev): |
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452 return self.base.lookuprev(rev) |
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453 |
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454 def getbookmarks(self): |
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455 return self.base.getbookmarks() |
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456 |
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457 def converted(self, rev, sinkrev): |
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458 self.base.converted(rev, sinkrev) |