Mercurial > hg
annotate hgext/convert/filemap.py @ 29272:e82ca7d0967c stable
Added signature for changeset a9764ab80e11
author | Matt Mackall <mpm@selenic.com> |
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date | Wed, 01 Jun 2016 15:48:38 -0500 |
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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. |
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6 from __future__ import absolute_import |
316 | 7 |
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8 import posixpath |
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9 import shlex |
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10 from mercurial import ( |
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11 error, |
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12 ) |
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13 from mercurial.i18n import _ |
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14 from . import common |
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15 SKIPREV = common.SKIPREV |
694 | 16 |
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17 def rpairs(path): |
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18 '''Yield tuples with path split at '/', starting with the full path. |
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19 No leading, trailing or double '/', please. |
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20 >>> for x in rpairs('foo/bar/baz'): print x |
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21 ('foo/bar/baz', '') |
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22 ('foo/bar', 'baz') |
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23 ('foo', 'bar/baz') |
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24 ('.', 'foo/bar/baz') |
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25 ''' |
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26 i = len(path) |
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27 while i != -1: |
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28 yield path[:i], path[i + 1:] |
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29 i = path.rfind('/', 0, i) |
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30 yield '.', path |
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31 |
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32 def normalize(path): |
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33 ''' We use posixpath.normpath to support cross-platform path format. |
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34 However, it doesn't handle None input. So we wrap it up. ''' |
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35 if path is None: |
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36 return None |
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37 return posixpath.normpath(path) |
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38 |
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39 class filemapper(object): |
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40 '''Map and filter filenames when importing. |
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41 A name can be mapped to itself, a new name, or None (omit from new |
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42 repository).''' |
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43 |
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44 def __init__(self, ui, path=None): |
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45 self.ui = ui |
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46 self.include = {} |
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47 self.exclude = {} |
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48 self.rename = {} |
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49 self.targetprefixes = None |
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50 if path: |
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51 if self.parse(path): |
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52 raise error.Abort(_('errors in filemap')) |
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53 |
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54 def parse(self, path): |
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55 errs = 0 |
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56 def check(name, mapping, listname): |
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57 if not name: |
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58 self.ui.warn(_('%s:%d: path to %s is missing\n') % |
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59 (lex.infile, lex.lineno, listname)) |
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60 return 1 |
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61 if name in mapping: |
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62 self.ui.warn(_('%s:%d: %r already in %s list\n') % |
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63 (lex.infile, lex.lineno, name, listname)) |
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64 return 1 |
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65 if (name.startswith('/') or |
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66 name.endswith('/') or |
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67 '//' in name): |
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68 self.ui.warn(_('%s:%d: superfluous / in %s %r\n') % |
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69 (lex.infile, lex.lineno, listname, name)) |
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70 return 1 |
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71 return 0 |
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72 lex = shlex.shlex(open(path), path, True) |
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73 lex.wordchars += '!@#$%^&*()-=+[]{}|;:,./<>?' |
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74 cmd = lex.get_token() |
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75 while cmd: |
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76 if cmd == 'include': |
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77 name = normalize(lex.get_token()) |
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78 errs += check(name, self.exclude, 'exclude') |
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79 self.include[name] = name |
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80 elif cmd == 'exclude': |
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81 name = normalize(lex.get_token()) |
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82 errs += check(name, self.include, 'include') |
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83 errs += check(name, self.rename, 'rename') |
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84 self.exclude[name] = name |
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85 elif cmd == 'rename': |
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86 src = normalize(lex.get_token()) |
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87 dest = normalize(lex.get_token()) |
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88 errs += check(src, self.exclude, 'exclude') |
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89 self.rename[src] = dest |
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90 elif cmd == 'source': |
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91 errs += self.parse(normalize(lex.get_token())) |
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92 else: |
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93 self.ui.warn(_('%s:%d: unknown directive %r\n') % |
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94 (lex.infile, lex.lineno, cmd)) |
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95 errs += 1 |
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96 cmd = lex.get_token() |
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97 return errs |
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98 |
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99 def lookup(self, name, mapping): |
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100 name = normalize(name) |
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101 for pre, suf in rpairs(name): |
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102 try: |
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103 return mapping[pre], pre, suf |
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104 except KeyError: |
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105 pass |
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106 return '', name, '' |
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107 |
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108 def istargetfile(self, filename): |
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109 """Return true if the given target filename is covered as a destination |
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110 of the filemap. This is useful for identifying what parts of the target |
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111 repo belong to the source repo and what parts don't.""" |
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112 if self.targetprefixes is None: |
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113 self.targetprefixes = set() |
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114 for before, after in self.rename.iteritems(): |
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115 self.targetprefixes.add(after) |
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116 |
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117 # If "." is a target, then all target files are considered from the |
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118 # source. |
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119 if not self.targetprefixes or '.' in self.targetprefixes: |
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120 return True |
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121 |
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122 filename = normalize(filename) |
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123 for pre, suf in rpairs(filename): |
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124 # This check is imperfect since it doesn't account for the |
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125 # include/exclude list, but it should work in filemaps that don't |
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126 # apply include/exclude to the same source directories they are |
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127 # renaming. |
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128 if pre in self.targetprefixes: |
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129 return True |
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130 return False |
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131 |
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132 def __call__(self, name): |
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133 if self.include: |
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134 inc = self.lookup(name, self.include)[0] |
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135 else: |
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136 inc = name |
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137 if self.exclude: |
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138 exc = self.lookup(name, self.exclude)[0] |
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139 else: |
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140 exc = '' |
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141 if (not self.include and exc) or (len(inc) <= len(exc)): |
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142 return None |
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143 newpre, pre, suf = self.lookup(name, self.rename) |
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144 if newpre: |
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145 if newpre == '.': |
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146 return suf |
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147 if suf: |
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148 if newpre.endswith('/'): |
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149 return newpre + suf |
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150 return newpre + '/' + suf |
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151 return newpre |
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152 return name |
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153 |
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154 def active(self): |
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155 return bool(self.include or self.exclude or self.rename) |
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156 |
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157 # This class does two additional things compared to a regular source: |
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158 # |
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159 # - Filter and rename files. This is mostly wrapped by the filemapper |
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160 # class above. We hide the original filename in the revision that is |
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161 # returned by getchanges to be able to find things later in getfile. |
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162 # |
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163 # - Return only revisions that matter for the files we're interested in. |
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164 # This involves rewriting the parents of the original revision to |
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165 # create a graph that is restricted to those revisions. |
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166 # |
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167 # This set of revisions includes not only revisions that directly |
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168 # touch files we're interested in, but also merges that merge two |
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169 # or more interesting revisions. |
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170 |
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171 class filemap_source(common.converter_source): |
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172 def __init__(self, ui, baseconverter, filemap): |
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173 super(filemap_source, self).__init__(ui) |
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174 self.base = baseconverter |
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175 self.filemapper = filemapper(ui, filemap) |
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176 self.commits = {} |
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177 # if a revision rev has parent p in the original revision graph, then |
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178 # rev will have parent self.parentmap[p] in the restricted graph. |
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179 self.parentmap = {} |
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180 # self.wantedancestors[rev] is the set of all ancestors of rev that |
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181 # are in the restricted graph. |
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182 self.wantedancestors = {} |
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183 self.convertedorder = None |
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184 self._rebuilt = False |
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185 self.origparents = {} |
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186 self.children = {} |
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187 self.seenchildren = {} |
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188 # experimental config: convert.ignoreancestorcheck |
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189 self.ignoreancestorcheck = self.ui.configbool('convert', |
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190 'ignoreancestorcheck') |
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191 |
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192 def before(self): |
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193 self.base.before() |
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194 |
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195 def after(self): |
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196 self.base.after() |
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197 |
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198 def setrevmap(self, revmap): |
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199 # rebuild our state to make things restartable |
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200 # |
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201 # To avoid calling getcommit for every revision that has already |
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202 # been converted, we rebuild only the parentmap, delaying the |
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203 # rebuild of wantedancestors until we need it (i.e. until a |
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204 # merge). |
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205 # |
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206 # We assume the order argument lists the revisions in |
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207 # topological order, so that we can infer which revisions were |
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208 # wanted by previous runs. |
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209 self._rebuilt = not revmap |
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210 seen = {SKIPREV: SKIPREV} |
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211 dummyset = set() |
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212 converted = [] |
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213 for rev in revmap.order: |
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214 mapped = revmap[rev] |
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215 wanted = mapped not in seen |
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216 if wanted: |
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217 seen[mapped] = rev |
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218 self.parentmap[rev] = rev |
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219 else: |
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220 self.parentmap[rev] = seen[mapped] |
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221 self.wantedancestors[rev] = dummyset |
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222 arg = seen[mapped] |
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223 if arg == SKIPREV: |
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224 arg = None |
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225 converted.append((rev, wanted, arg)) |
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226 self.convertedorder = converted |
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227 return self.base.setrevmap(revmap) |
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228 |
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229 def rebuild(self): |
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230 if self._rebuilt: |
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231 return True |
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232 self._rebuilt = True |
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233 self.parentmap.clear() |
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234 self.wantedancestors.clear() |
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235 self.seenchildren.clear() |
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236 for rev, wanted, arg in self.convertedorder: |
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237 if rev not in self.origparents: |
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238 try: |
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239 self.origparents[rev] = self.getcommit(rev).parents |
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240 except error.RepoLookupError: |
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241 self.ui.debug("unknown revmap source: %s\n" % rev) |
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242 continue |
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243 if arg is not None: |
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244 self.children[arg] = self.children.get(arg, 0) + 1 |
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245 |
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246 for rev, wanted, arg in self.convertedorder: |
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247 try: |
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248 parents = self.origparents[rev] |
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249 except KeyError: |
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250 continue # unknown revmap source |
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251 if wanted: |
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252 self.mark_wanted(rev, parents) |
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253 else: |
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254 self.mark_not_wanted(rev, arg) |
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255 self._discard(arg, *parents) |
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256 |
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257 return True |
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258 |
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259 def getheads(self): |
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260 return self.base.getheads() |
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261 |
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262 def getcommit(self, rev): |
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263 # We want to save a reference to the commit objects to be able |
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264 # to rewrite their parents later on. |
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265 c = self.commits[rev] = self.base.getcommit(rev) |
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266 for p in c.parents: |
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267 self.children[p] = self.children.get(p, 0) + 1 |
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268 return c |
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269 |
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270 def _cachedcommit(self, rev): |
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271 if rev in self.commits: |
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272 return self.commits[rev] |
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273 return self.base.getcommit(rev) |
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274 |
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275 def _discard(self, *revs): |
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276 for r in revs: |
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277 if r is None: |
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278 continue |
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279 self.seenchildren[r] = self.seenchildren.get(r, 0) + 1 |
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280 if self.seenchildren[r] == self.children[r]: |
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281 self.wantedancestors.pop(r, None) |
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282 self.parentmap.pop(r, None) |
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283 del self.seenchildren[r] |
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284 if self._rebuilt: |
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285 del self.children[r] |
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286 |
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287 def wanted(self, rev, i): |
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288 # Return True if we're directly interested in rev. |
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289 # |
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290 # i is an index selecting one of the parents of rev (if rev |
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291 # has no parents, i is None). getchangedfiles will give us |
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292 # the list of files that are different in rev and in the parent |
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293 # indicated by i. If we're interested in any of these files, |
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294 # we're interested in rev. |
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295 try: |
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296 files = self.base.getchangedfiles(rev, i) |
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297 except NotImplementedError: |
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298 raise error.Abort(_("source repository doesn't support --filemap")) |
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299 for f in files: |
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300 if self.filemapper(f): |
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301 return True |
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302 return False |
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303 |
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304 def mark_not_wanted(self, rev, p): |
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305 # Mark rev as not interesting and update data structures. |
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306 |
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307 if p is None: |
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308 # A root revision. Use SKIPREV to indicate that it doesn't |
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309 # map to any revision in the restricted graph. Put SKIPREV |
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310 # in the set of wanted ancestors to simplify code elsewhere |
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311 self.parentmap[rev] = SKIPREV |
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312 self.wantedancestors[rev] = set((SKIPREV,)) |
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313 return |
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314 |
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315 # Reuse the data from our parent. |
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316 self.parentmap[rev] = self.parentmap[p] |
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317 self.wantedancestors[rev] = self.wantedancestors[p] |
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318 |
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319 def mark_wanted(self, rev, parents): |
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320 # Mark rev ss wanted and update data structures. |
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321 |
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322 # rev will be in the restricted graph, so children of rev in |
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323 # the original graph should still have rev as a parent in the |
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324 # restricted graph. |
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325 self.parentmap[rev] = rev |
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326 |
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327 # The set of wanted ancestors of rev is the union of the sets |
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328 # of wanted ancestors of its parents. Plus rev itself. |
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329 wrev = set() |
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330 for p in parents: |
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331 if p in self.wantedancestors: |
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332 wrev.update(self.wantedancestors[p]) |
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333 else: |
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334 self.ui.warn(_('warning: %s parent %s is missing\n') % |
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335 (rev, p)) |
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336 wrev.add(rev) |
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337 self.wantedancestors[rev] = wrev |
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338 |
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339 def getchanges(self, rev, full): |
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340 parents = self.commits[rev].parents |
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341 if len(parents) > 1 and not self.ignoreancestorcheck: |
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342 self.rebuild() |
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343 |
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344 # To decide whether we're interested in rev we: |
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345 # |
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346 # - calculate what parents rev will have if it turns out we're |
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347 # interested in it. If it's going to have more than 1 parent, |
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348 # we're interested in it. |
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349 # |
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350 # - otherwise, we'll compare it with the single parent we found. |
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351 # If any of the files we're interested in is different in the |
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352 # the two revisions, we're interested in rev. |
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353 |
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354 # A parent p is interesting if its mapped version (self.parentmap[p]): |
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355 # - is not SKIPREV |
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356 # - is still not in the list of parents (we don't want duplicates) |
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357 # - is not an ancestor of the mapped versions of the other parents or |
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358 # there is no parent in the same branch than the current revision. |
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359 mparents = [] |
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360 knownparents = set() |
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361 branch = self.commits[rev].branch |
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362 hasbranchparent = False |
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363 for i, p1 in enumerate(parents): |
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364 mp1 = self.parentmap[p1] |
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365 if mp1 == SKIPREV or mp1 in knownparents: |
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366 continue |
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367 |
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368 isancestor = (not self.ignoreancestorcheck and |
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369 any(p2 for p2 in parents |
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370 if p1 != p2 and mp1 != self.parentmap[p2] |
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371 and mp1 in self.wantedancestors[p2])) |
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372 if not isancestor and not hasbranchparent and len(parents) > 1: |
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373 # This could be expensive, avoid unnecessary calls. |
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374 if self._cachedcommit(p1).branch == branch: |
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375 hasbranchparent = True |
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376 mparents.append((p1, mp1, i, isancestor)) |
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377 knownparents.add(mp1) |
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378 # Discard parents ancestors of other parents if there is a |
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379 # non-ancestor one on the same branch than current revision. |
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380 if hasbranchparent: |
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381 mparents = [p for p in mparents if not p[3]] |
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382 wp = None |
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383 if mparents: |
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384 wp = max(p[2] for p in mparents) |
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385 mparents = [p[1] for p in mparents] |
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386 elif parents: |
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387 wp = 0 |
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388 |
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389 self.origparents[rev] = parents |
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390 |
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391 closed = False |
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392 if 'close' in self.commits[rev].extra: |
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393 # A branch closing revision is only useful if one of its |
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394 # parents belong to the branch being closed |
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395 pbranches = [self._cachedcommit(p).branch for p in mparents] |
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396 if branch in pbranches: |
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397 closed = True |
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398 |
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399 if len(mparents) < 2 and not closed and not self.wanted(rev, wp): |
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400 # We don't want this revision. |
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401 # Update our state and tell the convert process to map this |
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402 # revision to the same revision its parent as mapped to. |
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403 p = None |
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404 if parents: |
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405 p = parents[wp] |
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406 self.mark_not_wanted(rev, p) |
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407 self.convertedorder.append((rev, False, p)) |
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408 self._discard(*parents) |
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409 return self.parentmap[rev] |
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410 |
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411 # We want this revision. |
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412 # Rewrite the parents of the commit object |
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413 self.commits[rev].parents = mparents |
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414 self.mark_wanted(rev, parents) |
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415 self.convertedorder.append((rev, True, None)) |
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416 self._discard(*parents) |
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417 |
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418 # Get the real changes and do the filtering/mapping. To be |
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419 # able to get the files later on in getfile, we hide the |
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420 # original filename in the rev part of the return value. |
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421 changes, copies, cleanp2 = self.base.getchanges(rev, full) |
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422 files = {} |
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423 ncleanp2 = set(cleanp2) |
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424 for f, r in changes: |
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425 newf = self.filemapper(f) |
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426 if newf and (newf != f or newf not in files): |
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427 files[newf] = (f, r) |
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428 if newf != f: |
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429 ncleanp2.discard(f) |
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430 files = sorted(files.items()) |
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431 |
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432 ncopies = {} |
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433 for c in copies: |
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434 newc = self.filemapper(c) |
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435 if newc: |
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436 newsource = self.filemapper(copies[c]) |
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437 if newsource: |
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438 ncopies[newc] = newsource |
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439 |
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440 return files, ncopies, ncleanp2 |
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441 |
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442 def targetfilebelongstosource(self, targetfilename): |
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443 return self.filemapper.istargetfile(targetfilename) |
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444 |
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445 def getfile(self, name, rev): |
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446 realname, realrev = rev |
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447 return self.base.getfile(realname, realrev) |
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448 |
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449 def gettags(self): |
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450 return self.base.gettags() |
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451 |
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452 def hasnativeorder(self): |
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453 return self.base.hasnativeorder() |
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454 |
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455 def lookuprev(self, rev): |
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456 return self.base.lookuprev(rev) |
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457 |
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458 def getbookmarks(self): |
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459 return self.base.getbookmarks() |
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460 |
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461 def converted(self, rev, sinkrev): |
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462 self.base.converted(rev, sinkrev) |