Mercurial > hg > hg-fastimport

annotate hgfastimport/hgimport.py @ 43:000d4174071c

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Don't blow up if first parent == second parent. cvs2git produces this on purpose, and git-fast-import handles it. (backout changeset a1ccf1817b65)
author Greg Ward <greg-hg@gerg.ca>
date Mon, 11 May 2009 13:59:20 -0400
parents 71f1e5ed6213
children 61ff7b929cea
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1 # Copyright (C) 2008 Canonical Ltd
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2 #
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3 # This program is free software; you can redistribute it and/or modify
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4 # it under the terms of the GNU General Public License as published by
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5 # the Free Software Foundation; either version 2 of the License, or
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6 # (at your option) any later version.
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7 #
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8 # This program is distributed in the hope that it will be useful,
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9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 # GNU General Public License for more details.
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12 #
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13 # You should have received a copy of the GNU General Public License
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14 # along with this program; if not, write to the Free Software
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15 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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16
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17 """Processor of import commands.
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18
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19 This module provides core processing functionality including an abstract class
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20 for basing real processors on. See the processors package for examples.
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21 """
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22
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23 import os
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24 import os.path
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25 import errno
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26 import shutil
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27
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28 import mercurial.hg
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29 import mercurial.commands
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30 from mercurial import util
42
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31 from mercurial.node import nullrev, hex
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32
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33 from fastimport import processor
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34 from hgfastimport import hgechoprocessor
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35
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36 class HgImportProcessor(processor.ImportProcessor):
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37
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38 def __init__(self, ui, repo, **opts):
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39 super(HgImportProcessor, self).__init__()
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40 self.ui = ui
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41 self.repo = repo
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42 self.opts = opts
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43 self.last_commit = None # CommitCommand object
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44 self.mark_map = {} # map mark (e.g. ":1") to revision number
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45 self.branch_map = {} # map git branch name to revision number
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46 self.lightweight_tags = [] # list of (ref, mark) tuples
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47
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48 self.numblobs = 0 # for progress reporting
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49 self.blobdir = None
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50
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51 def setup(self):
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52 """Setup before processing any streams."""
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53 pass
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54
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55 def teardown(self):
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56 """Cleanup after processing all streams."""
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57 # Hmmm: this isn't really a cleanup step, it's a post-processing
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58 # step. But we currently have one processor per input
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59 # stream... despite the fact that state like mark_map,
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60 # branch_map, and lightweight_tags really should span input
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61 # streams.
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62 self.write_lightweight_tags()
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63
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64 if self.blobdir and os.path.exists(self.blobdir):
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65 self.ui.status("Removing blob dir %r ...\n" % self.blobdir)
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66 shutil.rmtree(self.blobdir)
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67
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68 def progress_handler(self, cmd):
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69 self.ui.write("Progress: %s\n" % cmd.message)
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70
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71 def blob_handler(self, cmd):
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72 if self.blobdir is None: # no blobs seen yet
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73 # XXX cleanup?
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74 self.blobdir = os.path.join(self.repo.root, ".hg", "blobs")
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75 os.mkdir(self.blobdir)
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76
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77 fn = self.getblobfilename(cmd.id)
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78 blobfile = open(fn, "wb")
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79 #self.ui.debug("writing blob %s to %s (%d bytes)\n"
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80 # % (cmd.id, fn, len(cmd.data)))
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81 blobfile.write(cmd.data)
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82 blobfile.close()
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83
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84 self.numblobs += 1
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85 if self.numblobs % 500 == 0:
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86 self.ui.status("%d blobs read\n" % self.numblobs)
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87
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88 def getblobfilename(self, blobid):
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89 if self.blobdir is None:
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90 raise RuntimeError("no blobs seen, so no blob directory created")
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91 # XXX should escape ":" for windows
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92 return os.path.join(self.blobdir, "blob-" + blobid)
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93
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94 def checkpoint_handler(self, cmd):
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95 # This command means nothing to us
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96 pass
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97
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98 def committish_rev(self, committish):
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99 if committish.startswith(":"):
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100 return self.mark_map[committish]
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101 else:
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102 return self.branch_map[committish]
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103
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104 def commit_handler(self, cmd):
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105 # XXX this assumes the fixup branch name used by cvs2git. In
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106 # contrast, git-fast-import(1) recommends "TAG_FIXUP" (not under
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107 # refs/heads), and implies that it can be called whatever the
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108 # creator of the fastimport dump wants to call it. So the name
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109 # of the fixup branch should be configurable!
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110 fixup = (cmd.ref == "refs/heads/TAG.FIXUP")
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111
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112 if fixup and self.last_commit is not None:
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113 # If this is a fixup commit, pretend it is on the same
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114 # branch as the previous commit. This gives sensible
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115 # behaviour for selecting the first parent and for
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116 # determining the Mercurial branch name.
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117 cmd.ref = self.last_commit.ref
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118
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119 if cmd.from_:
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120 first_parent = self.committish_rev(cmd.from_)
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121 else:
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122 first_parent = self.branch_map.get(cmd.ref, nullrev)
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123 #self.ui.write("First parent: %s\n" % first_parent)
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124 # Update to the first parent
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125 mercurial.hg.clean(self.repo, self.repo.lookup(first_parent))
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126 #self.ui.write("Bing\n")
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127 if cmd.merges:
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128 #self.ui.write("foo")
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129 if len(cmd.merges) > 1:
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130 raise NotImplementedError("Can't handle more than two parents")
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131 second_parent = self.committish_rev(cmd.merges[0])
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132 #self.ui.write("Second parent: %s\n" % second_parent)
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133 mercurial.commands.debugsetparents(self.ui, self.repo,
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134 first_parent, second_parent)
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135 #self.ui.write("Bing\n")
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136 if cmd.ref == "refs/heads/master":
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137 branch = "default"
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138 else:
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139 branch = cmd.ref[len("refs/heads/"):]
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140 #self.ui.write("Branch: %s\n" % branch)
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141 self.repo.dirstate.setbranch(branch)
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142 #self.ui.write("Bing\n")
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143 #print "vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv"
11
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144 commit_handler = HgImportCommitHandler(
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145 self, cmd, self.ui, self.repo, **self.opts)
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146 commit_handler.process()
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147 #print "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^"
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148 #self.ui.write(cmd.dump_str(verbose=True))
16
234128693c29 Format the commit user as Full Name <user@example.com>
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149
234128693c29 Format the commit user as Full Name <user@example.com>
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150 # in case we are converting from git or bzr, prefer author but
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151 # fallback to committer (committer is required, author is
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152 # optional)
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153 userinfo = cmd.author or cmd.committer
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154 user = "%s <%s>" % (userinfo[0], userinfo[1])
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08e2157aaa9a Remove local fork of bzr-fastimport; use my fastimport library instead.
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155
37
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156 # Blech: have to monkeypatch mercurial.encoding to ensure that
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157 # everything under rawcommit() assumes the same encoding,
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158 # regardless of current locale.
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diff changeset
159 from mercurial import encoding
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160 encoding.encoding = "UTF-8"
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161
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162 files = commit_handler.filelist()
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163 assert type(cmd.message) is unicode
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164 text = cmd.message.encode("utf-8") # XXX cmd.message is unicode
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165 date = self.convert_date(userinfo)
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166 node = self.repo.rawcommit(
37
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167 files=files, text=text, user=user, date=date)
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168 rev = self.repo.changelog.rev(node)
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169 if cmd.mark is not None:
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170 self.mark_map[":" + cmd.mark] = rev
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177a133519bc Handle fixup branches for tag/branch creation better.
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171 if not fixup:
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172 self.branch_map[cmd.ref] = rev
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173 self.last_commit = cmd
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174 self.ui.write("Done commit of rev %d\n" % rev)
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175 #self.ui.write("%s\n" % self.mark_map)
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176
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177 def convert_date(self, c):
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178 res = (int(c[2]), int(c[3]))
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179 #print c, res
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180 #print type((0, 0)), type(res), len(res), type(res) is type((0, 0))
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181 #if type(res) is type((0, 0)) and len(res) == 2:
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182 # print "go for it"
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183 #return res
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184 return "%d %d" % res
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185
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186 def reset_handler(self, cmd):
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187 if cmd.ref.startswith("refs/heads/"):
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188 # The usual case for 'reset': (re)create the named branch.
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189 # XXX what should we do if cmd.from_ is None?
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190 if cmd.from_ is not None:
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191 self.branch_map[cmd.ref] = self.committish_rev(cmd.from_)
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192 #else:
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193 # # XXX filename? line number?
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194 # self.ui.warn("ignoring branch reset with no 'from'\n")
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195 elif cmd.ref.startswith("refs/tags/"):
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196 # Create a "lightweight tag" in Git terms. As I understand
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197 # it, that's a tag with no description and no history --
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198 # rather like CVS tags. cvs2git turns CVS tags into Git
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199 # lightweight tags, so we should make sure they become
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200 # Mercurial tags. But we don't have to fake a history for
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201 # them; save them up for the end.
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202 self.lightweight_tags.append((cmd.ref, cmd.from_))
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203
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204 def tag_handler(self, cmd):
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205 pass
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206
42
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207 def write_lightweight_tags(self):
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208 if not self.lightweight_tags: # avoid writing empty .hgtags
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209 return
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210
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211 # XXX what about duplicate tags? lightweight_tags is
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212 # deliberately a list, to preserve order ... but do we need to
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213 # worry about repeated tags? (Certainly not for cvs2git output,
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214 # since CVS has no tag history.)
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215
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216 # Create Mercurial tags from git-style "lightweight tags" in the
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217 # input stream.
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218 self.ui.status("updating tags\n")
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219 mercurial.hg.clean(self.repo, self.repo.lookup("default"))
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220 tagfile = open(self.repo.wjoin(".hgtags"), "ab")
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221 for (ref, mark) in self.lightweight_tags:
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222 tag = ref[len("refs/tags/"):]
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223 rev = self.mark_map[mark]
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diff changeset
224 node = self.repo.changelog.node(rev)
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225 tagfile.write("%s %s\n" % (hex(node), tag))
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diff changeset
226 tagfile.close()
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diff changeset
227
71f1e5ed6213 Convert "lightweight" tags, since that's how cvs2git handle CVS tags.
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diff changeset
228 files = [".hgtags"]
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diff changeset
229 self.repo.rawcommit(
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diff changeset
230 files=files, text="update tags", user="convert-repo", date=None)
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diff changeset
231
1
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232 class HgImportCommitHandler(processor.CommitHandler):
0
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233
11
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234 def __init__(self, parent, command, ui, repo, **opts):
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235 self.parent = parent # HgImportProcessor running the show
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236 self.command = command
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237 self.ui = ui
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238 self.repo = repo
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239 self.opts = opts
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240 self.files = set()
0
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241
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242 def _make_container(self, path):
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243 if '/' in path:
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244 d = os.path.dirname(path)
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245 if not os.path.isdir(d):
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246 os.makedirs(d)
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247
0
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248 def modify_handler(self, filecmd):
1
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249 #print "============================" + filecmd.path
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250 # FIXME: handle mode
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251 self.files.add(filecmd.path)
10
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252 fullpath = os.path.join(self.repo.root, filecmd.path)
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253 self._make_container(fullpath)
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254 #print "made dirs, writing file"
11
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255 if filecmd.dataref:
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256 # reference to a blob that has already appeared in the stream
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257 fn = self.parent.getblobfilename(filecmd.dataref)
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258 if os.path.exists(fullpath):
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259 os.remove(fullpath)
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260 try:
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261 os.link(fn, fullpath)
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262 except OSError, err:
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263 if err.errno == errno.ENOENT:
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264 # if this happens, it's a problem in the fast-import
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265 # stream
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266 raise util.Abort("bad blob ref %r (no such file %s)"
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267 % (filecmd.dataref, fn))
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268 else:
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269 # anything else is a bug in this extension
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270 # (cross-device move, permissions, etc.)
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diff changeset
271 raise
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272 elif filecmd.data:
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273 f = open(fullpath, "w")
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274 f.write(filecmd.data)
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275 f.close()
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276 else:
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277 raise RuntimeError("either filecmd.dataref or filecmd.data must be set")
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278 #print self.repo.add([filecmd.path])
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279 #print "Done:", filecmd.path
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280
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281 def delete_handler(self, filecmd):
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282 self.files.add(filecmd.path)
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283 self.repo.remove([filecmd.path], unlink=True)
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284
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285 #def copy_handler(self, filecmd):
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286 # self.files.add(filecmd.path)
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287 # """Handle a filecopy command."""
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288 # self.ui.write("Cmd: %s\n" % repr(filecmd))
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289
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290 #def rename_handler(self, filecmd):
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291 # self.files.add(filecmd.path)
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292 # """Handle a filerename command."""
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293 # self.ui.write("Cmd: %s\n" % repr(filecmd))
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294
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295 def filelist(self):
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296 return list(self.files)