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annotate contrib/darcs2hg.py @ 3673:eb0b4a2d70a9

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white space and line break cleanups
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 17 Nov 2006 08:06:54 +0100
parents d13e4ffaa79d
children
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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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