Mercurial > hg
annotate hgext/convert/common.py @ 15611:ec8a49c46d7e
merge with stable
author | Matt Mackall <mpm@selenic.com> |
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date | Mon, 05 Dec 2011 17:48:40 -0600 |
parents | 2ad4e9b44d8b 63ff8fe3a8f0 |
children | a814f8fcc65a |
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1 # common.py - common code for the convert extension |
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2 # |
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import base64, errno |
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9 import os |
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10 import cPickle as pickle |
8656 | 11 from mercurial import util |
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12 from mercurial.i18n import _ |
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13 |
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14 propertycache = util.propertycache |
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15 |
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16 def encodeargs(args): |
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17 def encodearg(s): |
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18 lines = base64.encodestring(s) |
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19 lines = [l.splitlines()[0] for l in lines] |
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20 return ''.join(lines) |
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21 |
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22 s = pickle.dumps(args) |
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23 return encodearg(s) |
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24 |
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25 def decodeargs(s): |
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26 s = base64.decodestring(s) |
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27 return pickle.loads(s) |
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28 |
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29 class MissingTool(Exception): |
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30 pass |
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31 |
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32 def checktool(exe, name=None, abort=True): |
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33 name = name or exe |
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34 if not util.findexe(exe): |
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35 exc = abort and util.Abort or MissingTool |
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36 raise exc(_('cannot find required "%s" tool') % name) |
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37 |
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38 class NoRepo(Exception): |
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39 pass |
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40 |
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41 SKIPREV = 'SKIP' |
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42 |
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43 class commit(object): |
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44 def __init__(self, author, date, desc, parents, branch=None, rev=None, |
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45 extra={}, sortkey=None): |
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46 self.author = author or 'unknown' |
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47 self.date = date or '0 0' |
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48 self.desc = desc |
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49 self.parents = parents |
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50 self.branch = branch |
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51 self.rev = rev |
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52 self.extra = extra |
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53 self.sortkey = sortkey |
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54 |
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55 class converter_source(object): |
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56 """Conversion source interface""" |
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57 |
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58 def __init__(self, ui, path=None, rev=None): |
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59 """Initialize conversion source (or raise NoRepo("message") |
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60 exception if path is not a valid repository)""" |
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61 self.ui = ui |
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62 self.path = path |
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63 self.rev = rev |
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64 |
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65 self.encoding = 'utf-8' |
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66 |
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67 def before(self): |
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68 pass |
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69 |
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70 def after(self): |
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71 pass |
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72 |
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73 def setrevmap(self, revmap): |
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74 """set the map of already-converted revisions""" |
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75 pass |
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76 |
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77 def getheads(self): |
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78 """Return a list of this repository's heads""" |
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79 raise NotImplementedError() |
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80 |
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81 def getfile(self, name, rev): |
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82 """Return a pair (data, mode) where data is the file content |
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83 as a string and mode one of '', 'x' or 'l'. rev is the |
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84 identifier returned by a previous call to getchanges(). Raise |
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85 IOError to indicate that name was deleted in rev. |
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86 """ |
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87 raise NotImplementedError() |
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88 |
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89 def getchanges(self, version): |
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90 """Returns a tuple of (files, copies). |
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91 |
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92 files is a sorted list of (filename, id) tuples for all files |
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93 changed between version and its first parent returned by |
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94 getcommit(). id is the source revision id of the file. |
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95 |
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96 copies is a dictionary of dest: source |
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97 """ |
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98 raise NotImplementedError() |
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99 |
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100 def getcommit(self, version): |
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101 """Return the commit object for version""" |
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102 raise NotImplementedError() |
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103 |
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104 def gettags(self): |
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105 """Return the tags as a dictionary of name: revision |
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106 |
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107 Tag names must be UTF-8 strings. |
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108 """ |
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109 raise NotImplementedError() |
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110 |
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111 def recode(self, s, encoding=None): |
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112 if not encoding: |
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113 encoding = self.encoding or 'utf-8' |
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114 |
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115 if isinstance(s, unicode): |
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116 return s.encode("utf-8") |
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117 try: |
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118 return s.decode(encoding).encode("utf-8") |
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119 except: |
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120 try: |
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121 return s.decode("latin-1").encode("utf-8") |
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122 except: |
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123 return s.decode(encoding, "replace").encode("utf-8") |
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124 |
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125 def getchangedfiles(self, rev, i): |
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126 """Return the files changed by rev compared to parent[i]. |
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127 |
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128 i is an index selecting one of the parents of rev. The return |
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129 value should be the list of files that are different in rev and |
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130 this parent. |
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131 |
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132 If rev has no parents, i is None. |
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133 |
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134 This function is only needed to support --filemap |
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135 """ |
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136 raise NotImplementedError() |
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137 |
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138 def converted(self, rev, sinkrev): |
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139 '''Notify the source that a revision has been converted.''' |
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140 pass |
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141 |
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142 def hasnativeorder(self): |
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143 """Return true if this source has a meaningful, native revision |
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144 order. For instance, Mercurial revisions are store sequentially |
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145 while there is no such global ordering with Darcs. |
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146 """ |
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147 return False |
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148 |
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149 def lookuprev(self, rev): |
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150 """If rev is a meaningful revision reference in source, return |
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151 the referenced identifier in the same format used by getcommit(). |
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152 return None otherwise. |
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153 """ |
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154 return None |
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155 |
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156 def getbookmarks(self): |
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157 """Return the bookmarks as a dictionary of name: revision |
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158 |
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159 Bookmark names are to be UTF-8 strings. |
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160 """ |
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161 return {} |
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162 |
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163 class converter_sink(object): |
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164 """Conversion sink (target) interface""" |
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165 |
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166 def __init__(self, ui, path): |
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167 """Initialize conversion sink (or raise NoRepo("message") |
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168 exception if path is not a valid repository) |
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169 |
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170 created is a list of paths to remove if a fatal error occurs |
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171 later""" |
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172 self.ui = ui |
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173 self.path = path |
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174 self.created = [] |
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175 |
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176 def getheads(self): |
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177 """Return a list of this repository's heads""" |
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178 raise NotImplementedError() |
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179 |
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180 def revmapfile(self): |
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181 """Path to a file that will contain lines |
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182 source_rev_id sink_rev_id |
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183 mapping equivalent revision identifiers for each system.""" |
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184 raise NotImplementedError() |
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185 |
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186 def authorfile(self): |
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187 """Path to a file that will contain lines |
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188 srcauthor=dstauthor |
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189 mapping equivalent authors identifiers for each system.""" |
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190 return None |
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191 |
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192 def putcommit(self, files, copies, parents, commit, source, revmap): |
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193 """Create a revision with all changed files listed in 'files' |
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194 and having listed parents. 'commit' is a commit object |
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195 containing at a minimum the author, date, and message for this |
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196 changeset. 'files' is a list of (path, version) tuples, |
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197 'copies' is a dictionary mapping destinations to sources, |
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198 'source' is the source repository, and 'revmap' is a mapfile |
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199 of source revisions to converted revisions. Only getfile() and |
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200 lookuprev() should be called on 'source'. |
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201 |
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202 Note that the sink repository is not told to update itself to |
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203 a particular revision (or even what that revision would be) |
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204 before it receives the file data. |
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205 """ |
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206 raise NotImplementedError() |
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207 |
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208 def puttags(self, tags): |
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209 """Put tags into sink. |
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210 |
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211 tags: {tagname: sink_rev_id, ...} where tagname is an UTF-8 string. |
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212 Return a pair (tag_revision, tag_parent_revision), or (None, None) |
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213 if nothing was changed. |
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214 """ |
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215 raise NotImplementedError() |
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216 |
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217 def setbranch(self, branch, pbranches): |
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218 """Set the current branch name. Called before the first putcommit |
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219 on the branch. |
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220 branch: branch name for subsequent commits |
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221 pbranches: (converted parent revision, parent branch) tuples""" |
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222 pass |
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223 |
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224 def setfilemapmode(self, active): |
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225 """Tell the destination that we're using a filemap |
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226 |
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227 Some converter_sources (svn in particular) can claim that a file |
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228 was changed in a revision, even if there was no change. This method |
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229 tells the destination that we're using a filemap and that it should |
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230 filter empty revisions. |
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231 """ |
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232 pass |
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233 |
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234 def before(self): |
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235 pass |
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236 |
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237 def after(self): |
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238 pass |
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239 |
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240 def putbookmarks(self, bookmarks): |
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241 """Put bookmarks into sink. |
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242 |
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243 bookmarks: {bookmarkname: sink_rev_id, ...} |
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244 where bookmarkname is an UTF-8 string. |
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245 """ |
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246 pass |
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247 |
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248 class commandline(object): |
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249 def __init__(self, ui, command): |
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250 self.ui = ui |
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251 self.command = command |
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252 |
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253 def prerun(self): |
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254 pass |
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255 |
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256 def postrun(self): |
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257 pass |
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258 |
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259 def _cmdline(self, cmd, closestdin, *args, **kwargs): |
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260 cmdline = [self.command, cmd] + list(args) |
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261 for k, v in kwargs.iteritems(): |
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262 if len(k) == 1: |
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263 cmdline.append('-' + k) |
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264 else: |
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265 cmdline.append('--' + k.replace('_', '-')) |
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266 try: |
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267 if len(k) == 1: |
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268 cmdline.append('' + v) |
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269 else: |
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270 cmdline[-1] += '=' + v |
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271 except TypeError: |
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272 pass |
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273 cmdline = [util.shellquote(arg) for arg in cmdline] |
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274 if not self.ui.debugflag: |
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275 cmdline += ['2>', util.nulldev] |
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276 if closestdin: |
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277 cmdline += ['<', util.nulldev] |
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278 cmdline = ' '.join(cmdline) |
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279 return cmdline |
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280 |
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281 def _run(self, cmd, *args, **kwargs): |
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282 return self._dorun(util.popen, cmd, True, *args, **kwargs) |
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283 |
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284 def _run2(self, cmd, *args, **kwargs): |
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285 return self._dorun(util.popen2, cmd, False, *args, **kwargs) |
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286 |
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287 def _dorun(self, openfunc, cmd, closestdin, *args, **kwargs): |
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288 cmdline = self._cmdline(cmd, closestdin, *args, **kwargs) |
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289 self.ui.debug('running: %s\n' % (cmdline,)) |
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290 self.prerun() |
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291 try: |
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292 return openfunc(cmdline) |
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293 finally: |
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294 self.postrun() |
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295 |
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296 def run(self, cmd, *args, **kwargs): |
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297 fp = self._run(cmd, *args, **kwargs) |
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298 output = fp.read() |
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299 self.ui.debug(output) |
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300 return output, fp.close() |
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301 |
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302 def runlines(self, cmd, *args, **kwargs): |
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303 fp = self._run(cmd, *args, **kwargs) |
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304 output = fp.readlines() |
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305 self.ui.debug(''.join(output)) |
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306 return output, fp.close() |
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307 |
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308 def checkexit(self, status, output=''): |
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309 if status: |
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310 if output: |
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311 self.ui.warn(_('%s error:\n') % self.command) |
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312 self.ui.warn(output) |
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313 msg = util.explainexit(status)[0] |
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314 raise util.Abort('%s %s' % (self.command, msg)) |
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315 |
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316 def run0(self, cmd, *args, **kwargs): |
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317 output, status = self.run(cmd, *args, **kwargs) |
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318 self.checkexit(status, output) |
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319 return output |
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320 |
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321 def runlines0(self, cmd, *args, **kwargs): |
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322 output, status = self.runlines(cmd, *args, **kwargs) |
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323 self.checkexit(status, ''.join(output)) |
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324 return output |
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325 |
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326 @propertycache |
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327 def argmax(self): |
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328 # POSIX requires at least 4096 bytes for ARG_MAX |
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329 argmax = 4096 |
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330 try: |
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331 argmax = os.sysconf("SC_ARG_MAX") |
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332 except: |
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333 pass |
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334 |
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335 # Windows shells impose their own limits on command line length, |
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336 # down to 2047 bytes for cmd.exe under Windows NT/2k and 2500 bytes |
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337 # for older 4nt.exe. See http://support.microsoft.com/kb/830473 for |
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338 # details about cmd.exe limitations. |
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339 |
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340 # Since ARG_MAX is for command line _and_ environment, lower our limit |
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341 # (and make happy Windows shells while doing this). |
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342 return argmax / 2 - 1 |
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343 |
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344 def limit_arglist(self, arglist, cmd, closestdin, *args, **kwargs): |
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345 cmdlen = len(self._cmdline(cmd, closestdin, *args, **kwargs)) |
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346 limit = self.argmax - cmdlen |
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347 bytes = 0 |
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348 fl = [] |
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349 for fn in arglist: |
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350 b = len(fn) + 3 |
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351 if bytes + b < limit or len(fl) == 0: |
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352 fl.append(fn) |
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353 bytes += b |
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354 else: |
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355 yield fl |
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356 fl = [fn] |
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357 bytes = b |
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358 if fl: |
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359 yield fl |
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360 |
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361 def xargs(self, arglist, cmd, *args, **kwargs): |
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362 for l in self.limit_arglist(arglist, cmd, True, *args, **kwargs): |
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363 self.run0(cmd, *(list(args) + l), **kwargs) |
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364 |
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365 class mapfile(dict): |
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366 def __init__(self, ui, path): |
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367 super(mapfile, self).__init__() |
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368 self.ui = ui |
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369 self.path = path |
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370 self.fp = None |
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371 self.order = [] |
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372 self._read() |
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373 |
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374 def _read(self): |
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375 if not self.path: |
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376 return |
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377 try: |
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378 fp = open(self.path, 'r') |
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379 except IOError, err: |
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380 if err.errno != errno.ENOENT: |
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381 raise |
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382 return |
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383 for i, line in enumerate(fp): |
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384 try: |
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385 key, value = line.splitlines()[0].rstrip().rsplit(' ', 1) |
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386 except ValueError: |
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387 raise util.Abort( |
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388 _('syntax error in %s(%d): key/value pair expected') |
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389 % (self.path, i + 1)) |
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390 if key not in self: |
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391 self.order.append(key) |
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392 super(mapfile, self).__setitem__(key, value) |
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393 fp.close() |
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394 |
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395 def __setitem__(self, key, value): |
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396 if self.fp is None: |
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397 try: |
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398 self.fp = open(self.path, 'a') |
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399 except IOError, err: |
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400 raise util.Abort(_('could not open map file %r: %s') % |
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401 (self.path, err.strerror)) |
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402 self.fp.write('%s %s\n' % (key, value)) |
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403 self.fp.flush() |
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404 super(mapfile, self).__setitem__(key, value) |
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405 |
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406 def close(self): |
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407 if self.fp: |
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408 self.fp.close() |
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409 self.fp = None |