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annotate contrib/darcs2hg.py @ 2749:d13e4ffaa79d

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[darcs2hg] Windows compatibilty patct Originally submitted by Daiju Kito 1. single quote didn't work in several cases 2. os.unlink tries to delete tmpfile when it's called. It won't wait like unix.
author Sébastien Pierre <sebastien@xprima.com>
date Tue, 01 Aug 2006 09:51:36 -0400
parents 8210cf2ec19d
children eb0b4a2d70a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2 # Encoding: iso-8859-1
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3 # vim: tw=80 ts=4 sw=4 noet
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4 # -----------------------------------------------------------------------------
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5 # Project : Basic Darcs to Mercurial conversion script
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6 # -----------------------------------------------------------------------------
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7 # Authors : Sebastien Pierre <sebastien@xprima.com>
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8 # TK Soh <teekaysoh@gmail.com>
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9 # -----------------------------------------------------------------------------
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10 # Creation : 24-May-2006
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11 # Last mod : 05-Jun-2006
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12 # -----------------------------------------------------------------------------
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13
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14 import os, sys
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15 import tempfile
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16 import xml.dom.minidom as xml_dom
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17 from time import strptime, mktime
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18
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19 DARCS_REPO = None
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20 HG_REPO = None
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21
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22 USAGE = """\
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23 %s DARCSREPO HGREPO [SKIP]
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24
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25 Converts the given Darcs repository to a new Mercurial repository. The given
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26 HGREPO must not exist, as it will be created and filled up (this will avoid
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27 overwriting valuable data.
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28
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29 In case an error occurs within the process, you can resume the process by
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30 giving the last successfuly applied change number.
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31 """ % (os.path.basename(sys.argv[0]))
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32
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33 # ------------------------------------------------------------------------------
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34 #
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35 # Utilities
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36 #
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37 # ------------------------------------------------------------------------------
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38
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39 def cmd(text, path=None, silent=False):
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40 """Executes a command, in the given directory (if any), and returns the
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41 command result as a string."""
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42 cwd = None
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43 if path:
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44 path = os.path.abspath(path)
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45 cwd = os.getcwd()
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46 os.chdir(path)
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47 if not silent: print "> ", text
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48 res = os.popen(text).read()
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49 if path:
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50 os.chdir(cwd)
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51 return res
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52
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53 def writefile(path, data):
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54 """Writes the given data into the given file."""
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55 f = file(path, "w") ; f.write(data) ; f.close()
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56
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57 def error( *args ):
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58 sys.stderr.write("ERROR: ")
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59 for a in args: sys.stderr.write(str(a))
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60 sys.stderr.write("\n")
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61 sys.stderr.write("You can make manual fixes if necessary and then resume by"
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62 " giving the last changeset number")
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63 sys.exit(-1)
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64
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65 # ------------------------------------------------------------------------------
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66 #
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67 # Darcs interface
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68 #
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69 # ------------------------------------------------------------------------------
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70
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71 def darcs_changes(darcsRepo):
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72 """Gets the changes list from the given darcs repository. This returns the
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73 chronological list of changes as (change name, change summary)."""
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74 changes = cmd("darcs changes --reverse --xml-output", darcsRepo)
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75 doc = xml_dom.parseString(changes)
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76 for patch_node in doc.childNodes[0].childNodes:
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77 name = filter(lambda n:n.nodeName == "name", patch_node.childNodes)
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78 comm = filter(lambda n:n.nodeName == "comment", patch_node.childNodes)
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79 if not name:continue
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80 else: name = name[0].childNodes[0].data
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81 if not comm: comm = ""
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82 else: comm = comm[0].childNodes[0].data
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83 author = patch_node.getAttribute("author")
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84 date = patch_node.getAttribute("date")
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85 chash = os.path.splitext(patch_node.getAttribute("hash"))[0]
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86 yield author, date, name, chash, comm
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87
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88 def darcs_tip(darcs_repo):
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89 changes = cmd("darcs changes",darcs_repo,silent=True)
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90 changes = filter(lambda l:l.strip().startswith("* "), changes.split("\n"))
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91 return len(changes)
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92
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93 def darcs_pull(hg_repo, darcs_repo, chash):
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94 old_tip = darcs_tip(darcs_repo)
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95 res = cmd("darcs pull \"%s\" --all --match=\"hash %s\"" % (darcs_repo, chash), hg_repo)
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96 print res
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97 new_tip = darcs_tip(darcs_repo)
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98 if not new_tip != old_tip + 1:
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99 error("Darcs pull did not work as expected: " + res)
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100
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101 # ------------------------------------------------------------------------------
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102 #
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103 # Mercurial interface
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104 #
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105 # ------------------------------------------------------------------------------
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106
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107 def hg_commit( hg_repo, text, author, date ):
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108 fd, tmpfile = tempfile.mkstemp(prefix="darcs2hg_")
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109 writefile(tmpfile, text)
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110 old_tip = hg_tip(hg_repo)
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111 cmd("hg add -X _darcs", hg_repo)
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112 cmd("hg remove -X _darcs --after", hg_repo)
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113 res = cmd("hg commit -l %s -u \"%s\" -d \"%s 0\"" % (tmpfile, author, date), hg_repo)
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114 os.close(fd)
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115 os.unlink(tmpfile)
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116 new_tip = hg_tip(hg_repo)
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117 if not new_tip == old_tip + 1:
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118 # Sometimes we may have empty commits, we simply skip them
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119 if res.strip().lower().find("nothing changed") != -1:
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120 pass
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121 else:
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122 error("Mercurial commit did not work as expected: " + res)
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123
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124 def hg_tip( hg_repo ):
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125 """Returns the latest local revision number in the given repository."""
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126 tip = cmd("hg tip", hg_repo, silent=True)
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127 tip = tip.split("\n")[0].split(":")[1].strip()
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128 return int(tip)
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129
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130 # ------------------------------------------------------------------------------
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131 #
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132 # Main
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133 #
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134 # ------------------------------------------------------------------------------
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135
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136 if __name__ == "__main__":
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137 args = sys.argv[1:]
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138 # We parse the arguments
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139 if len(args) == 2:
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140 darcs_repo = os.path.abspath(args[0])
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141 hg_repo = os.path.abspath(args[1])
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142 skip = None
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143 elif len(args) == 3:
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144 darcs_repo = os.path.abspath(args[0])
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145 hg_repo = os.path.abspath(args[1])
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146 skip = int(args[2])
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147 else:
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148 print USAGE
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149 sys.exit(-1)
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150 # Initializes the target repo
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151 if not os.path.isdir(darcs_repo + "/_darcs"):
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152 print "No darcs directory found at: " + darcs_repo
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153 sys.exit(-1)
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154 if not os.path.isdir(hg_repo):
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155 os.mkdir(hg_repo)
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156 elif skip == None:
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157 print "Given HG repository must not exist when no SKIP is specified."
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158 sys.exit(-1)
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159 if skip == None:
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160 cmd("hg init \"%s\"" % (hg_repo))
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161 cmd("darcs initialize", hg_repo)
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162 # Get the changes from the Darcs repository
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163 change_number = 0
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164 for author, date, summary, chash, description in darcs_changes(darcs_repo):
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165 print "== changeset", change_number,
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166 if skip != None and change_number <= skip:
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167 print "(skipping)"
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168 else:
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169 text = summary + "\n" + description
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170 darcs_pull(hg_repo, darcs_repo, chash)
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171 # The commit hash has a date like 20021020201112
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172 # --------------------------------YYYYMMDDHHMMSS
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173 date = chash.split("-")[0]
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174 epoch = int(mktime(strptime(date, '%Y%m%d%H%M%S')))
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175 hg_commit(hg_repo, text, author, epoch)
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176 change_number += 1
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177 print "Darcs repository (_darcs) was not deleted. You can keep or remove it."
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178
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179 # EOF