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annotate contrib/darcs2hg.py @ 2349:88c881bda888

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darcs2hg.py: import darcs project into mercurial For now, the tags are not taken into account (so you have to reenter the tags by hand)
author Sébastien Pierre <sebastien@xprima.com>
date Sat, 27 May 2006 15:04:40 -0700
parents
children 61909dfb316d
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88c881bda888 darcs2hg.py: import darcs project into mercurial
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1 #!/usr/bin/env python
88c881bda888 darcs2hg.py: import darcs project into mercurial
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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 # Author : Sebastien Pierre <sebastien@xprima.com>
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8 # Creation : 24-May-2006
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9 # Last mod : 26-May-2006
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10 # History :
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11 # 26-May-2006 - Updated
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12 # 24-May-2006 - First implementation
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13 # -----------------------------------------------------------------------------
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14
88c881bda888 darcs2hg.py: import darcs project into mercurial
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15 import os, sys
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16 import xml.dom.minidom as xml_dom
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17
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18 DARCS_REPO = None
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19 HG_REPO = None
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20
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21 USAGE = """\
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22 %s DARCSREPO HGREPO
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23
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24 Converts the given Darcs repository to a new Mercurial repository. The given
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25 HGREPO must not exist, as it will be created and filled up (this will avoid
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26 overwriting valuable data.
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27
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28 """ % (os.path.basename(__file__))
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29
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30 # ------------------------------------------------------------------------------
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31 #
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32 # Utilities
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33 #
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34 # ------------------------------------------------------------------------------
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35
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36 def cmd(text, path=None):
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37 """Executes a command, in the given directory (if any), and returns the
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38 command result as a string."""
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39 cwd = None
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40 if path:
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41 path = os.path.abspath(path)
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42 cwd = os.getcwd()
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43 os.chdir(path)
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44 print text
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45 res = os.popen(text).read()
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46 if path:
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47 os.chdir(cwd)
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48 return res
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49
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50 def writefile(path, data):
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51 """Writes the given data into the given file."""
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52 f = file(path, "w") ; f.write(data) ; f.close()
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53
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54 # ------------------------------------------------------------------------------
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55 #
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56 # Darcs interface
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57 #
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58 # ------------------------------------------------------------------------------
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59
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60 def darcs_changes(darcsRepo):
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61 """Gets the changes list from the given darcs repository. This returns the
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62 chronological list of changes as (change name, change summary)."""
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63 changes = cmd("darcs changes --reverse --xml-output", darcsRepo)
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64 doc = xml_dom.parseString(changes)
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65 res = []
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66 for patch_node in doc.childNodes[0].childNodes:
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67 name = filter(lambda n:n.nodeName == "name", patch_node.childNodes)
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68 comm = filter(lambda n:n.nodeName == "comment", patch_node.childNodes)
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69 if not name:continue
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70 else: name = name[0].childNodes[0].data
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71 if not comm: comm = ""
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72 else: comm = comm[0].childNodes[0].data
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73 res.append([name, comm])
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74 return res
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75
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76 def darcs_pull(hg_repo, darcs_repo, change):
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77 cmd("darcs pull '%s' --all --patches='%s'" % (darcs_repo, change), hg_repo)
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78
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79 # ------------------------------------------------------------------------------
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80 #
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81 # Mercurial interface
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82 #
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83 # ------------------------------------------------------------------------------
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84
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85 def hg_commit( hg_repo, text ):
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86 writefile("/tmp/msg", text)
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87 cmd("hg add -X _darcs *", hg_repo)
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88 cmd("hg commit -l /tmp/msg", hg_repo)
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89 os.unlink("/tmp/msg")
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90
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91 # ------------------------------------------------------------------------------
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92 #
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93 # Main
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94 #
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95 # ------------------------------------------------------------------------------
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96
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97 if __name__ == "__main__":
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98 args = sys.argv[1:]
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99 # We parse the arguments
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100 if len(args) == 2:
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101 darcs_repo = os.path.abspath(args[0])
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102 hg_repo = os.path.abspath(args[1])
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103 else:
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104 print USAGE
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105 sys.exit(-1)
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106 # Initializes the target repo
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107 if not os.path.isdir(darcs_repo + "/_darcs"):
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108 print "No darcs directory found at: " + darc_repo
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109 sys.exit(-1)
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110 if not os.path.isdir(hg_repo):
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111 os.mkdir(hg_repo)
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112 else:
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113 print "Given HG repository must not exist. It will be created"
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114 sys.exit(-1)
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115 cmd("hg init '%s'" % (hg_repo))
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116 cmd("darcs initialize", hg_repo)
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117 # Get the changes from the Darcs repository
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118 for summary, description in darcs_changes(darcs_repo):
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119 text = summary + "\n" + description
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120 darcs_pull(hg_repo, darcs_repo, summary)
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121 hg_commit(hg_repo, text)
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122
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123 # EOF
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124