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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 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 |
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