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annotate contrib/darcs2hg.py @ 2585:5ec2dded1bda

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darcs2hg.py: use darcs patch hash as patch identifier The use of the patch name is dangerous when duplicate names exist. In case of a duplicate name the second patch and all its dependancies are merged into a single mercurial patch. The patch identifier (hash) is always unique.
author Nils Decker <mercurial@ndecker.de>
date Sun, 09 Jul 2006 21:41:00 -0700
parents 61909dfb316d
children bb63d29ce03d fe3e87358b47
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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 # 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
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15 import os, sys
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16 import tempfile
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17 import xml.dom.minidom as xml_dom
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18 from time import strptime, mktime
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19
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20 DARCS_REPO = None
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21 HG_REPO = None
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22
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23 USAGE = """\
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24 %s DARCSREPO HGREPO
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25
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26 Converts the given Darcs repository to a new Mercurial repository. The given
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27 HGREPO must not exist, as it will be created and filled up (this will avoid
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28 overwriting valuable data.
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29
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30 """ % (os.path.basename(sys.argv[0]))
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31
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32 # ------------------------------------------------------------------------------
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33 #
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34 # Utilities
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35 #
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36 # ------------------------------------------------------------------------------
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37
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38 def cmd(text, path=None):
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39 """Executes a command, in the given directory (if any), and returns the
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40 command result as a string."""
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41 cwd = None
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42 if path:
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43 path = os.path.abspath(path)
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44 cwd = os.getcwd()
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45 os.chdir(path)
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46 print text
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47 res = os.popen(text).read()
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48 if path:
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49 os.chdir(cwd)
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50 return res
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51
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52 def writefile(path, data):
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53 """Writes the given data into the given file."""
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54 f = file(path, "w") ; f.write(data) ; f.close()
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55
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56 # ------------------------------------------------------------------------------
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57 #
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58 # Darcs interface
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59 #
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60 # ------------------------------------------------------------------------------
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61
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62 def darcs_changes(darcsRepo):
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63 """Gets the changes list from the given darcs repository. This returns the
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64 chronological list of changes as (change name, change summary)."""
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65 changes = cmd("darcs changes --reverse --xml-output", darcsRepo)
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66 doc = xml_dom.parseString(changes)
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67 res = []
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68 for patch_node in doc.childNodes[0].childNodes:
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69 name = filter(lambda n:n.nodeName == "name", patch_node.childNodes)
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70 comm = filter(lambda n:n.nodeName == "comment", patch_node.childNodes)
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71 if not name:continue
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72 else: name = name[0].childNodes[0].data
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73 if not comm: comm = ""
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74 else: comm = comm[0].childNodes[0].data
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75 author = patch_node.getAttribute("author")
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76 date = patch_node.getAttribute("date")
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77 hash = patch_node.getAttribute("hash")
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78 yield hash, author, date, name, comm
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79
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80 def darcs_pull(hg_repo, darcs_repo, change):
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81 cmd("darcs pull '%s' --all --patches='%s'" % (darcs_repo, change), hg_repo)
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82
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83 # ------------------------------------------------------------------------------
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84 #
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85 # Mercurial interface
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86 #
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87 # ------------------------------------------------------------------------------
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88
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89 def hg_commit( hg_repo, text, author, date ):
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90 fd, tmpfile = tempfile.mkstemp(prefix="darcs2hg_")
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91 writefile(tmpfile, text)
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92 cmd("hg add -X _darcs", hg_repo)
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93 cmd("hg remove -X _darcs --after", hg_repo)
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94 cmd("hg commit -l %s -u '%s' -d '%s 0'" % (tmpfile, author, date), hg_repo)
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95 os.unlink(tmpfile)
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96
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97 # ------------------------------------------------------------------------------
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98 #
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99 # Main
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100 #
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101 # ------------------------------------------------------------------------------
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102
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103 if __name__ == "__main__":
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104 args = sys.argv[1:]
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105 # We parse the arguments
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106 if len(args) == 2:
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107 darcs_repo = os.path.abspath(args[0])
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108 hg_repo = os.path.abspath(args[1])
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109 else:
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110 print USAGE
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111 sys.exit(-1)
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112 # Initializes the target repo
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113 if not os.path.isdir(darcs_repo + "/_darcs"):
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114 print "No darcs directory found at: " + darc_repo
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115 sys.exit(-1)
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116 if not os.path.isdir(hg_repo):
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117 os.mkdir(hg_repo)
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118 else:
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119 print "Given HG repository must not exist. It will be created"
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120 sys.exit(-1)
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121 cmd("hg init '%s'" % (hg_repo))
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122 cmd("darcs initialize", hg_repo)
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123 # Get the changes from the Darcs repository
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124 for hash, author, date, summary, description in darcs_changes(darcs_repo):
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125 text = summary + "\n" + description
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126 darcs_pull(hg_repo, darcs_repo, hash)
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61909dfb316d various fixes to darcs conversion script
TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
127 epoch = int(mktime(strptime(date, '%Y%m%d%H%M%S')))
61909dfb316d various fixes to darcs conversion script
TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
128 hg_commit(hg_repo, text, author, epoch)
2349
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
129
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
130 # EOF
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
131