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comparison 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
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children 61909dfb316d
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2348:1772852d7d14 2349:88c881bda888
1 #!/usr/bin/env python
2 # Encoding: iso-8859-1
3 # vim: tw=80 ts=4 sw=4 noet
4 # -----------------------------------------------------------------------------
5 # Project : Basic Darcs to Mercurial conversion script
6 # -----------------------------------------------------------------------------
7 # Author : Sebastien Pierre <sebastien@xprima.com>
8 # Creation : 24-May-2006
9 # Last mod : 26-May-2006
10 # History :
11 # 26-May-2006 - Updated
12 # 24-May-2006 - First implementation
13 # -----------------------------------------------------------------------------
14
15 import os, sys
16 import xml.dom.minidom as xml_dom
17
18 DARCS_REPO = None
19 HG_REPO = None
20
21 USAGE = """\
22 %s DARCSREPO HGREPO
23
24 Converts the given Darcs repository to a new Mercurial repository. The given
25 HGREPO must not exist, as it will be created and filled up (this will avoid
26 overwriting valuable data.
27
28 """ % (os.path.basename(__file__))
29
30 # ------------------------------------------------------------------------------
31 #
32 # Utilities
33 #
34 # ------------------------------------------------------------------------------
35
36 def cmd(text, path=None):
37 """Executes a command, in the given directory (if any), and returns the
38 command result as a string."""
39 cwd = None
40 if path:
41 path = os.path.abspath(path)
42 cwd = os.getcwd()
43 os.chdir(path)
44 print text
45 res = os.popen(text).read()
46 if path:
47 os.chdir(cwd)
48 return res
49
50 def writefile(path, data):
51 """Writes the given data into the given file."""
52 f = file(path, "w") ; f.write(data) ; f.close()
53
54 # ------------------------------------------------------------------------------
55 #
56 # Darcs interface
57 #
58 # ------------------------------------------------------------------------------
59
60 def darcs_changes(darcsRepo):
61 """Gets the changes list from the given darcs repository. This returns the
62 chronological list of changes as (change name, change summary)."""
63 changes = cmd("darcs changes --reverse --xml-output", darcsRepo)
64 doc = xml_dom.parseString(changes)
65 res = []
66 for patch_node in doc.childNodes[0].childNodes:
67 name = filter(lambda n:n.nodeName == "name", patch_node.childNodes)
68 comm = filter(lambda n:n.nodeName == "comment", patch_node.childNodes)
69 if not name:continue
70 else: name = name[0].childNodes[0].data
71 if not comm: comm = ""
72 else: comm = comm[0].childNodes[0].data
73 res.append([name, comm])
74 return res
75
76 def darcs_pull(hg_repo, darcs_repo, change):
77 cmd("darcs pull '%s' --all --patches='%s'" % (darcs_repo, change), hg_repo)
78
79 # ------------------------------------------------------------------------------
80 #
81 # Mercurial interface
82 #
83 # ------------------------------------------------------------------------------
84
85 def hg_commit( hg_repo, text ):
86 writefile("/tmp/msg", text)
87 cmd("hg add -X _darcs *", hg_repo)
88 cmd("hg commit -l /tmp/msg", hg_repo)
89 os.unlink("/tmp/msg")
90
91 # ------------------------------------------------------------------------------
92 #
93 # Main
94 #
95 # ------------------------------------------------------------------------------
96
97 if __name__ == "__main__":
98 args = sys.argv[1:]
99 # We parse the arguments
100 if len(args) == 2:
101 darcs_repo = os.path.abspath(args[0])
102 hg_repo = os.path.abspath(args[1])
103 else:
104 print USAGE
105 sys.exit(-1)
106 # Initializes the target repo
107 if not os.path.isdir(darcs_repo + "/_darcs"):
108 print "No darcs directory found at: " + darc_repo
109 sys.exit(-1)
110 if not os.path.isdir(hg_repo):
111 os.mkdir(hg_repo)
112 else:
113 print "Given HG repository must not exist. It will be created"
114 sys.exit(-1)
115 cmd("hg init '%s'" % (hg_repo))
116 cmd("darcs initialize", hg_repo)
117 # Get the changes from the Darcs repository
118 for summary, description in darcs_changes(darcs_repo):
119 text = summary + "\n" + description
120 darcs_pull(hg_repo, darcs_repo, summary)
121 hg_commit(hg_repo, text)
122
123 # EOF
124