annotate contrib/darcs2hg.py @ 5340:ad8783fe20f7

darcs2hg: Now detects and recovers from simple darcs conflicts.
author Terry Smith <terry@t11e.com>
date Tue, 11 Sep 2007 13:13:54 -0400
parents b62a59fa9d26
children bd706eb8bc25
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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 import re
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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 [SKIP]
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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 In case an error occurs within the process, you can resume the process by
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31 giving the last successfuly applied change number.
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32 """ % (os.path.basename(sys.argv[0]))
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33
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34 # ------------------------------------------------------------------------------
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35 #
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36 # Utilities
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37 #
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38 # ------------------------------------------------------------------------------
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39
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40 def cmd(text, path=None, silent=False):
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41 """Executes a command, in the given directory (if any), and returns the
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42 command result as a string."""
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43 cwd = None
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44 if path:
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45 path = os.path.abspath(path)
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46 cwd = os.getcwd()
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47 os.chdir(path)
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48 if not silent: print "> ", text
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49 res = os.popen(text).read()
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50 if path:
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51 os.chdir(cwd)
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52 return res
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53
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54 def writefile(path, data):
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55 """Writes the given data into the given file."""
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56 f = file(path, "w") ; f.write(data) ; f.close()
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57
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58 def error( *args ):
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59 sys.stderr.write("ERROR: ")
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60 for a in args: sys.stderr.write(str(a))
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61 sys.stderr.write("\n")
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62 sys.stderr.write("You can make manual fixes if necessary and then resume by"
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63 " giving the last changeset number")
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64 sys.exit(-1)
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65
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66 # ------------------------------------------------------------------------------
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67 #
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68 # Darcs interface
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69 #
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70 # ------------------------------------------------------------------------------
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71
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72 def darcs_changes(darcsRepo):
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73 """Gets the changes list from the given darcs repository. This returns the
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74 chronological list of changes as (change name, change summary)."""
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75 changes = cmd("darcs changes --reverse --xml-output", darcsRepo)
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76 doc = xml_dom.parseString(changes)
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77 for patch_node in doc.childNodes[0].childNodes:
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78 name = filter(lambda n: n.nodeName == "name", patch_node.childNodes)
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79 comm = filter(lambda n: n.nodeName == "comment", patch_node.childNodes)
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80 if not name:continue
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81 else: name = name[0].childNodes[0].data
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82 if not comm: comm = ""
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83 else: comm = comm[0].childNodes[0].data
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84 author = patch_node.getAttribute("author")
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85 date = patch_node.getAttribute("date")
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86 chash = os.path.splitext(patch_node.getAttribute("hash"))[0]
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87 yield author, date, name, chash, comm
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88
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89 def darcs_tip(darcs_repo):
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90 changes = cmd("darcs changes",darcs_repo,silent=True)
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91 changes = filter(lambda l: l.strip().startswith("* "), changes.split("\n"))
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92 return len(changes)
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93
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94 def darcs_pull(hg_repo, darcs_repo, chash):
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95 old_tip = darcs_tip(darcs_repo)
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96 res = cmd("darcs pull \"%s\" --all --match=\"hash %s\"" % (darcs_repo, chash), hg_repo)
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97 if re.search('^We have conflicts in the following files:$', res, re.MULTILINE):
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98 print "Trying to revert files to work around conflict..."
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99 rev_res = cmd ("darcs revert --all", hg_repo)
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100 print rev_res
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101 print res
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102 new_tip = darcs_tip(darcs_repo)
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103 if not new_tip != old_tip + 1:
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104 error("Darcs pull did not work as expected: " + res)
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105
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106 def darcs_changes_summary(darcs_repo, chash):
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107 """Gets the changes from the darcs summary. This returns the chronological
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108 list of changes as (change_type, args). Eg. ('add_file', 'foo.txt') or
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109 ('move', ['foo.txt','bar.txt'])."""
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110 change = cmd("darcs changes --summary --xml-output --match=\"hash %s\"" % (chash), darcs_repo)
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111 doc = xml_dom.parseString(change)
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112 for patch_node in doc.childNodes[0].childNodes:
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113 summary_nodes = filter(lambda n: n.nodeName == "summary" and n.nodeType == n.ELEMENT_NODE, patch_node.childNodes)
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114 for summary_node in summary_nodes:
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115 change_nodes = filter(lambda n: n.nodeType == n.ELEMENT_NODE, summary_node.childNodes)
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116 for change_node in change_nodes:
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117 change = change_node.nodeName
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118 if change == 'modify_file':
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119 yield change, change_node.childNodes[0].data.strip()
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120 elif change == 'add_file':
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
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parents: 3673
diff changeset
121 yield change, change_node.childNodes[0].data.strip()
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
122 elif change == 'remove_file':
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
123 yield change, change_node.childNodes[0].data.strip()
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
124 elif change == 'add_directory':
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
125 yield change, change_node.childNodes[0].data.strip()
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
126 elif change == 'remove_directory':
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
127 yield change, change_node.childNodes[0].data.strip()
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
128 elif change == 'move':
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
129 yield change, (change_node.getAttribute('from'), change_node.getAttribute('to'))
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
130 else:
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
131 error('Problem parsing summary xml: Unexpected element: ' + change_node.toxml())
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parents: 3673
diff changeset
132
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parents:
diff changeset
133 # ------------------------------------------------------------------------------
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
134 #
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
135 # Mercurial interface
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
136 #
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
137 # ------------------------------------------------------------------------------
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
138
2352
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TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
139 def hg_commit( hg_repo, text, author, date ):
61909dfb316d various fixes to darcs conversion script
TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
140 fd, tmpfile = tempfile.mkstemp(prefix="darcs2hg_")
61909dfb316d various fixes to darcs conversion script
TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
141 writefile(tmpfile, text)
2587
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parents: 2585
diff changeset
142 old_tip = hg_tip(hg_repo)
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61909dfb316d various fixes to darcs conversion script
TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
143 cmd("hg add -X _darcs", hg_repo)
61909dfb316d various fixes to darcs conversion script
TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
144 cmd("hg remove -X _darcs --after", hg_repo)
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d13e4ffaa79d [darcs2hg] Windows compatibilty patct
Sébastien Pierre <sebastien@xprima.com>
parents: 2588
diff changeset
145 res = cmd("hg commit -l %s -u \"%s\" -d \"%s 0\"" % (tmpfile, author, date), hg_repo)
d13e4ffaa79d [darcs2hg] Windows compatibilty patct
Sébastien Pierre <sebastien@xprima.com>
parents: 2588
diff changeset
146 os.close(fd)
2352
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TK Soh <teekaysoh@yahoo.com>
parents: 2349
diff changeset
147 os.unlink(tmpfile)
2587
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diff changeset
148 new_tip = hg_tip(hg_repo)
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Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
149 if not new_tip == old_tip + 1:
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parents: 2585
diff changeset
150 # Sometimes we may have empty commits, we simply skip them
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
151 if res.strip().lower().find("nothing changed") != -1:
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
152 pass
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
153 else:
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
154 error("Mercurial commit did not work as expected: " + res)
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
155
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
156 def hg_tip( hg_repo ):
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
157 """Returns the latest local revision number in the given repository."""
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
158 tip = cmd("hg tip", hg_repo, silent=True)
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
159 tip = tip.split("\n")[0].split(":")[1].strip()
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
160 return int(tip)
2349
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parents:
diff changeset
161
5339
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parents: 3673
diff changeset
162 def hg_rename( hg_repo, from_file, to_file ):
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
163 cmd("hg rename --after \"%s\" \"%s\"" % (from_file, to_file), hg_repo);
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
164
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
165 def hg_handle_change( hg_repo, change, arg ):
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
166 """Processes a change event as output by darcs_changes_summary. These
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
167 consist of file move/rename/add/delete commands."""
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
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parents: 3673
diff changeset
168 if change == 'modify_file':
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parents: 3673
diff changeset
169 pass
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parents: 3673
diff changeset
170 elif change == 'add_file':
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parents: 3673
diff changeset
171 pass
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parents: 3673
diff changeset
172 elif change =='remove_file':
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parents: 3673
diff changeset
173 pass
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
174 elif change == 'add_directory':
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parents: 3673
diff changeset
175 pass
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
176 elif change == 'remove_directory':
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
177 pass
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
178 elif change == 'move':
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
179 hg_rename(hg_repo, arg[0], arg[1])
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parents: 3673
diff changeset
180 else:
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parents: 3673
diff changeset
181 error('Unknown change type ' + change + ': ' + arg)
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
182
2349
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parents:
diff changeset
183 # ------------------------------------------------------------------------------
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
184 #
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
185 # Main
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
186 #
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
187 # ------------------------------------------------------------------------------
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
188
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
189 if __name__ == "__main__":
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
190 args = sys.argv[1:]
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
191 # We parse the arguments
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
192 if len(args) == 2:
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
193 darcs_repo = os.path.abspath(args[0])
88c881bda888 darcs2hg.py: import darcs project into mercurial
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parents:
diff changeset
194 hg_repo = os.path.abspath(args[1])
2587
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parents: 2585
diff changeset
195 skip = None
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parents: 2585
diff changeset
196 elif len(args) == 3:
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
197 darcs_repo = os.path.abspath(args[0])
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
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parents: 2585
diff changeset
198 hg_repo = os.path.abspath(args[1])
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
199 skip = int(args[2])
2349
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parents:
diff changeset
200 else:
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
201 print USAGE
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
202 sys.exit(-1)
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
203 # Initializes the target repo
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
204 if not os.path.isdir(darcs_repo + "/_darcs"):
2586
bb63d29ce03d darcs2hg: improved logging
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
205 print "No darcs directory found at: " + darcs_repo
2349
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
206 sys.exit(-1)
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
207 if not os.path.isdir(hg_repo):
88c881bda888 darcs2hg.py: import darcs project into mercurial
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parents:
diff changeset
208 os.mkdir(hg_repo)
2587
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parents: 2585
diff changeset
209 elif skip == None:
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
210 print "Given HG repository must not exist when no SKIP is specified."
2349
88c881bda888 darcs2hg.py: import darcs project into mercurial
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parents:
diff changeset
211 sys.exit(-1)
2587
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
212 if skip == None:
2749
d13e4ffaa79d [darcs2hg] Windows compatibilty patct
Sébastien Pierre <sebastien@xprima.com>
parents: 2588
diff changeset
213 cmd("hg init \"%s\"" % (hg_repo))
2587
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Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
214 cmd("darcs initialize", hg_repo)
2349
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
215 # Get the changes from the Darcs repository
2587
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
216 change_number = 0
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
217 for author, date, summary, chash, description in darcs_changes(darcs_repo):
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
218 print "== changeset", change_number,
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
219 if skip != None and change_number <= skip:
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
220 print "(skipping)"
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
221 else:
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
222 text = summary + "\n" + description
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
223 # The commit hash has a date like 20021020201112
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
224 # --------------------------------YYYYMMDDHHMMSS
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
225 date = chash.split("-")[0]
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
226 epoch = int(mktime(strptime(date, '%Y%m%d%H%M%S')))
5339
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Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
227 darcs_pull(hg_repo, darcs_repo, chash)
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
228 for change, arg in darcs_changes_summary(darcs_repo, chash):
b62a59fa9d26 darcs2hg: Now understands files that were explicitly renamed in darcs.
Terry Smith <terry@t11e.com>
parents: 3673
diff changeset
229 hg_handle_change(hg_repo, change, arg)
2587
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Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
230 hg_commit(hg_repo, text, author, epoch)
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
231 change_number += 1
fe3e87358b47 darcs2hg: pause and resume support, date extraction from commit hash, does not break on empty commits
Sébastien Pierre <sebastien@xprima.com>
parents: 2585
diff changeset
232 print "Darcs repository (_darcs) was not deleted. You can keep or remove it."
2349
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
233
88c881bda888 darcs2hg.py: import darcs project into mercurial
Sébastien Pierre <sebastien@xprima.com>
parents:
diff changeset
234 # EOF