Mercurial > hg
annotate hgext/convert/bzr.py @ 26365:33af0c53aeff
help: add config.troubleshooting section at the top
author | timeless@mozdev.org |
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date | Thu, 24 Sep 2015 14:45:17 -0400 |
parents | baea47cafe75 |
children | 56b2bcea2529 |
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1 # bzr.py - bzr support for the convert extension |
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2 # |
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3 # Copyright 2008, 2009 Marek Kubica <marek@xivilization.net> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
7053 | 8 # This module is for handling 'bzr', that was formerly known as Bazaar-NG; |
9 # it cannot access 'bar' repositories, but they were never used very much | |
10 | |
11 import os | |
12 from mercurial import demandimport | |
13 # these do not work with demandimport, blacklist | |
14 demandimport.ignore.extend([ | |
15 'bzrlib.transactions', | |
16 'bzrlib.urlutils', | |
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17 'ElementPath', |
7053 | 18 ]) |
19 | |
20 from mercurial.i18n import _ | |
21 from mercurial import util | |
22 from common import NoRepo, commit, converter_source | |
23 | |
24 try: | |
25 # bazaar imports | |
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26 from bzrlib import bzrdir, revision, errors |
7053 | 27 from bzrlib.revisionspec import RevisionSpec |
28 except ImportError: | |
29 pass | |
30 | |
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31 supportedkinds = ('file', 'symlink') |
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32 |
7053 | 33 class bzr_source(converter_source): |
34 """Reads Bazaar repositories by using the Bazaar Python libraries""" | |
35 | |
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36 def __init__(self, ui, path, revs=None): |
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37 super(bzr_source, self).__init__(ui, path, revs=revs) |
7053 | 38 |
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39 if not os.path.exists(os.path.join(path, '.bzr')): |
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40 raise NoRepo(_('%s does not look like a Bazaar repository') |
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41 % path) |
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42 |
7053 | 43 try: |
44 # access bzrlib stuff | |
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45 bzrdir |
7053 | 46 except NameError: |
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47 raise NoRepo(_('Bazaar modules could not be loaded')) |
7053 | 48 |
49 path = os.path.abspath(path) | |
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50 self._checkrepotype(path) |
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51 try: |
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52 self.sourcerepo = bzrdir.BzrDir.open(path).open_repository() |
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53 except errors.NoRepositoryPresent: |
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54 raise NoRepo(_('%s does not look like a Bazaar repository') |
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55 % path) |
7053 | 56 self._parentids = {} |
57 | |
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58 def _checkrepotype(self, path): |
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59 # Lightweight checkouts detection is informational but probably |
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60 # fragile at API level. It should not terminate the conversion. |
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61 try: |
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62 from bzrlib import bzrdir |
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63 dir = bzrdir.BzrDir.open_containing(path)[0] |
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64 try: |
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65 tree = dir.open_workingtree(recommend_upgrade=False) |
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66 branch = tree.branch |
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67 except (errors.NoWorkingTree, errors.NotLocalUrl): |
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68 tree = None |
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69 branch = dir.open_branch() |
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70 if (tree is not None and tree.bzrdir.root_transport.base != |
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71 branch.bzrdir.root_transport.base): |
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72 self.ui.warn(_('warning: lightweight checkouts may cause ' |
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73 'conversion failures, try with a regular ' |
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74 'branch instead.\n')) |
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75 except Exception: |
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76 self.ui.note(_('bzr source type could not be determined\n')) |
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77 |
7053 | 78 def before(self): |
79 """Before the conversion begins, acquire a read lock | |
80 for all the operations that might need it. Fortunately | |
81 read locks don't block other reads or writes to the | |
82 repository, so this shouldn't have any impact on the usage of | |
83 the source repository. | |
84 | |
85 The alternative would be locking on every operation that | |
86 needs locks (there are currently two: getting the file and | |
87 getting the parent map) and releasing immediately after, | |
88 but this approach can take even 40% longer.""" | |
89 self.sourcerepo.lock_read() | |
90 | |
91 def after(self): | |
92 self.sourcerepo.unlock() | |
93 | |
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94 def _bzrbranches(self): |
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95 return self.sourcerepo.find_branches(using=True) |
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96 |
7053 | 97 def getheads(self): |
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98 if not self.revs: |
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99 # Set using=True to avoid nested repositories (see issue3254) |
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100 heads = sorted([b.last_revision() for b in self._bzrbranches()]) |
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101 else: |
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102 revid = None |
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103 for branch in self._bzrbranches(): |
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104 try: |
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105 r = RevisionSpec.from_string(self.revs[0]) |
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106 info = r.in_history(branch) |
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107 except errors.BzrError: |
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108 pass |
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109 revid = info.rev_id |
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110 if revid is None: |
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111 raise util.Abort(_('%s is not a valid revision') % self.revs[0]) |
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112 heads = [revid] |
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113 # Empty repositories return 'null:', which cannot be retrieved |
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114 heads = [h for h in heads if h != 'null:'] |
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115 return heads |
7053 | 116 |
117 def getfile(self, name, rev): | |
118 revtree = self.sourcerepo.revision_tree(rev) | |
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119 fileid = revtree.path2id(name.decode(self.encoding or 'utf-8')) |
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120 kind = None |
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121 if fileid is not None: |
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122 kind = revtree.kind(fileid) |
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123 if kind not in supportedkinds: |
7053 | 124 # the file is not available anymore - was deleted |
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125 return None, None |
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126 mode = self._modecache[(name, rev)] |
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127 if kind == 'symlink': |
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128 target = revtree.get_symlink_target(fileid) |
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129 if target is None: |
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130 raise util.Abort(_('%s.%s symlink has no target') |
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131 % (name, rev)) |
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132 return target, mode |
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133 else: |
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134 sio = revtree.get_file(fileid) |
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135 return sio.read(), mode |
7053 | 136 |
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137 def getchanges(self, version, full): |
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138 if full: |
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139 raise util.Abort(_("convert from cvs do not support --full")) |
7053 | 140 self._modecache = {} |
141 self._revtree = self.sourcerepo.revision_tree(version) | |
142 # get the parentids from the cache | |
143 parentids = self._parentids.pop(version) | |
144 # only diff against first parent id | |
145 prevtree = self.sourcerepo.revision_tree(parentids[0]) | |
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146 files, changes = self._gettreechanges(self._revtree, prevtree) |
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147 return files, changes, set() |
7053 | 148 |
149 def getcommit(self, version): | |
150 rev = self.sourcerepo.get_revision(version) | |
151 # populate parent id cache | |
152 if not rev.parent_ids: | |
153 parents = [] | |
154 self._parentids[version] = (revision.NULL_REVISION,) | |
155 else: | |
156 parents = self._filterghosts(rev.parent_ids) | |
157 self._parentids[version] = parents | |
158 | |
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159 branch = self.recode(rev.properties.get('branch-nick', u'default')) |
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160 if branch == 'trunk': |
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161 branch = 'default' |
7053 | 162 return commit(parents=parents, |
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163 date='%d %d' % (rev.timestamp, -rev.timezone), |
7053 | 164 author=self.recode(rev.committer), |
165 desc=self.recode(rev.message), | |
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166 branch=branch, |
7053 | 167 rev=version) |
168 | |
169 def gettags(self): | |
170 bytetags = {} | |
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171 for branch in self._bzrbranches(): |
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172 if not branch.supports_tags(): |
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173 return {} |
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174 tagdict = branch.tags.get_tag_dict() |
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175 for name, rev in tagdict.iteritems(): |
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176 bytetags[self.recode(name)] = rev |
7053 | 177 return bytetags |
178 | |
179 def getchangedfiles(self, rev, i): | |
180 self._modecache = {} | |
181 curtree = self.sourcerepo.revision_tree(rev) | |
182 if i is not None: | |
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183 parentid = self._parentids[rev][i] |
7053 | 184 else: |
185 # no parent id, get the empty revision | |
186 parentid = revision.NULL_REVISION | |
187 | |
188 prevtree = self.sourcerepo.revision_tree(parentid) | |
189 changes = [e[0] for e in self._gettreechanges(curtree, prevtree)[0]] | |
190 return changes | |
191 | |
192 def _gettreechanges(self, current, origin): | |
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193 revid = current._revision_id |
7053 | 194 changes = [] |
195 renames = {} | |
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196 seen = set() |
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197 # Process the entries by reverse lexicographic name order to |
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198 # handle nested renames correctly, most specific first. |
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199 curchanges = sorted(current.iter_changes(origin), |
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200 key=lambda c: c[1][0] or c[1][1], |
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201 reverse=True) |
7053 | 202 for (fileid, paths, changed_content, versioned, parent, name, |
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203 kind, executable) in curchanges: |
7053 | 204 |
205 if paths[0] == u'' or paths[1] == u'': | |
206 # ignore changes to tree root | |
207 continue | |
208 | |
209 # bazaar tracks directories, mercurial does not, so | |
210 # we have to rename the directory contents | |
211 if kind[1] == 'directory': | |
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212 if kind[0] not in (None, 'directory'): |
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213 # Replacing 'something' with a directory, record it |
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214 # so it can be removed. |
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215 changes.append((self.recode(paths[0]), revid)) |
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216 |
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217 if kind[0] == 'directory' and None not in paths: |
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218 renaming = paths[0] != paths[1] |
7053 | 219 # neither an add nor an delete - a move |
220 # rename all directory contents manually | |
221 subdir = origin.inventory.path2id(paths[0]) | |
222 # get all child-entries of the directory | |
223 for name, entry in origin.inventory.iter_entries(subdir): | |
224 # hg does not track directory renames | |
225 if entry.kind == 'directory': | |
226 continue | |
227 frompath = self.recode(paths[0] + '/' + name) | |
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228 if frompath in seen: |
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229 # Already handled by a more specific change entry |
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230 # This is important when you have: |
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231 # a => b |
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232 # a/c => a/c |
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233 # Here a/c must not be renamed into b/c |
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234 continue |
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235 seen.add(frompath) |
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236 if not renaming: |
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237 continue |
7053 | 238 topath = self.recode(paths[1] + '/' + name) |
239 # register the files as changed | |
240 changes.append((frompath, revid)) | |
241 changes.append((topath, revid)) | |
242 # add to mode cache | |
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243 mode = ((entry.executable and 'x') |
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244 or (entry.kind == 'symlink' and 's') |
7053 | 245 or '') |
246 self._modecache[(topath, revid)] = mode | |
247 # register the change as move | |
248 renames[topath] = frompath | |
249 | |
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250 # no further changes, go to the next change |
7053 | 251 continue |
252 | |
253 # we got unicode paths, need to convert them | |
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254 path, topath = paths |
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255 if path is not None: |
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256 path = self.recode(path) |
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257 if topath is not None: |
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258 topath = self.recode(topath) |
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259 seen.add(path or topath) |
7053 | 260 |
261 if topath is None: | |
262 # file deleted | |
263 changes.append((path, revid)) | |
264 continue | |
265 | |
266 # renamed | |
267 if path and path != topath: | |
268 renames[topath] = path | |
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269 changes.append((path, revid)) |
7053 | 270 |
271 # populate the mode cache | |
272 kind, executable = [e[1] for e in (kind, executable)] | |
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273 mode = ((executable and 'x') or (kind == 'symlink' and 'l') |
7053 | 274 or '') |
275 self._modecache[(topath, revid)] = mode | |
276 changes.append((topath, revid)) | |
277 | |
278 return changes, renames | |
279 | |
280 def _filterghosts(self, ids): | |
281 """Filters out ghost revisions which hg does not support, see | |
282 <http://bazaar-vcs.org/GhostRevision> | |
283 """ | |
284 parentmap = self.sourcerepo.get_parent_map(ids) | |
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285 parents = tuple([parent for parent in ids if parent in parentmap]) |
7053 | 286 return parents |