Mercurial > hg
annotate contrib/darcs2hg.py @ 2587:fe3e87358b47
darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
author | Sébastien Pierre <sebastien@xprima.com> |
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date | Mon, 10 Jul 2006 12:19:37 -0400 |
parents | 5ec2dded1bda |
children | 8210cf2ec19d |
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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.unlink(tmpfile) |
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115 new_tip = hg_tip(hg_repo) |
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116 if not new_tip == old_tip + 1: |
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117 # Sometimes we may have empty commits, we simply skip them |
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118 if res.strip().lower().find("nothing changed") != -1: |
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119 pass |
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120 else: |
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121 error("Mercurial commit did not work as expected: " + res) |
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122 |
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123 def hg_tip( hg_repo ): |
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124 """Returns the latest local revision number in the given repository.""" |
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125 tip = cmd("hg tip", hg_repo, silent=True) |
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126 tip = tip.split("\n")[0].split(":")[1].strip() |
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127 return int(tip) |
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128 |
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129 # ------------------------------------------------------------------------------ |
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130 # |
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131 # Main |
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132 # |
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133 # ------------------------------------------------------------------------------ |
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134 |
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135 if __name__ == "__main__": |
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136 args = sys.argv[1:] |
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137 # We parse the arguments |
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138 if len(args) == 2: |
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139 darcs_repo = os.path.abspath(args[0]) |
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140 hg_repo = os.path.abspath(args[1]) |
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141 skip = None |
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142 elif len(args) == 3: |
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143 darcs_repo = os.path.abspath(args[0]) |
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144 hg_repo = os.path.abspath(args[1]) |
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145 skip = int(args[2]) |
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146 else: |
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147 print USAGE |
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148 sys.exit(-1) |
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149 # Initializes the target repo |
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150 if not os.path.isdir(darcs_repo + "/_darcs"): |
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151 print "No darcs directory found at: " + darcs_repo |
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152 sys.exit(-1) |
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153 if not os.path.isdir(hg_repo): |
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154 os.mkdir(hg_repo) |
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155 elif skip == None: |
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156 print "Given HG repository must not exist when no SKIP is specified." |
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157 sys.exit(-1) |
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158 if skip == None: |
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159 cmd("hg init '%s'" % (hg_repo)) |
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160 cmd("darcs initialize", hg_repo) |
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161 # Get the changes from the Darcs repository |
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162 change_number = 0 |
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163 for author, date, summary, chash, description in darcs_changes(darcs_repo): |
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164 print "== changeset", change_number, |
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165 if skip != None and change_number <= skip: |
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166 print "(skipping)" |
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167 else: |
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168 text = summary + "\n" + description |
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169 darcs_pull(hg_repo, darcs_repo, chash) |
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170 # The commit hash has a date like 20021020201112 |
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171 # --------------------------------YYYYMMDDHHMMSS |
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172 date = chash.split("-")[0] |
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173 epoch = int(mktime(strptime(date, '%Y%m%d%H%M%S'))) |
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174 hg_commit(hg_repo, text, author, epoch) |
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175 change_number += 1 |
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176 print "Darcs repository (_darcs) was not deleted. You can keep or remove it." |
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177 |
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178 # EOF |