Mercurial > hg
annotate hgext/convert/bzr.py @ 16060:f84dda152a55
convert/bzr: convert all branches (issue3229) (BC)
Instead of opening the target bzr checkout as a single branch, we try to open
it as a repository. This has the following effects:
- All branches are now converted
- bzr branch names are preserved. Previously, the selected branch was always
converted as 'default'. Branches without a name or 'trunk' are mapped to
'default branch.
- Lightweight checkouts are no longer supported. Maybe they can be, I did not
try to fix that at all.
Implementation notes:
- This was a quick fix, I have no knowledge of bzr API besides browsing 2.0.3
sources.
- The fix was only tested on OSX against bzr 2.4.2.
- Tags discovery does not handle collisions. I have no idea how tags work in
bzr so maybe such collisions are not possible.
author | Patrick Mezard <pmezard@gmail.com> |
---|---|
date | Thu, 02 Feb 2012 10:15:12 +0100 |
parents | f5b6046f6ce8 |
children | 915e06faa8f3 |
rev | line source |
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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 | |
36 def __init__(self, ui, path, rev=None): | |
37 super(bzr_source, self).__init__(ui, path, rev=rev) | |
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: |
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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 | |
94 def getheads(self): | |
95 if not self.rev: | |
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96 heads = sorted([b.last_revision() |
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97 for b in self.sourcerepo.find_branches()]) |
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98 else: |
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99 revid = None |
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100 for branch in self.sourcerepo.find_branches(): |
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101 try: |
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102 r = RevisionSpec.from_string(self.rev) |
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103 info = r.in_history(branch) |
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104 except errors.BzrError: |
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105 pass |
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106 revid = info.rev_id |
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107 if revid is None: |
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108 raise util.Abort(_('%s is not a valid revision') % self.rev) |
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109 heads = [revid] |
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110 return heads |
7053 | 111 |
112 def getfile(self, name, rev): | |
113 revtree = self.sourcerepo.revision_tree(rev) | |
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114 fileid = revtree.path2id(name.decode(self.encoding or 'utf-8')) |
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115 kind = None |
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116 if fileid is not None: |
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117 kind = revtree.kind(fileid) |
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118 if kind not in supportedkinds: |
7053 | 119 # the file is not available anymore - was deleted |
120 raise IOError(_('%s is not available in %s anymore') % | |
121 (name, rev)) | |
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122 mode = self._modecache[(name, rev)] |
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123 if kind == 'symlink': |
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124 target = revtree.get_symlink_target(fileid) |
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125 if target is None: |
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126 raise util.Abort(_('%s.%s symlink has no target') |
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127 % (name, rev)) |
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128 return target, mode |
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129 else: |
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130 sio = revtree.get_file(fileid) |
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131 return sio.read(), mode |
7053 | 132 |
133 def getchanges(self, version): | |
134 # set up caches: modecache and revtree | |
135 self._modecache = {} | |
136 self._revtree = self.sourcerepo.revision_tree(version) | |
137 # get the parentids from the cache | |
138 parentids = self._parentids.pop(version) | |
139 # only diff against first parent id | |
140 prevtree = self.sourcerepo.revision_tree(parentids[0]) | |
141 return self._gettreechanges(self._revtree, prevtree) | |
142 | |
143 def getcommit(self, version): | |
144 rev = self.sourcerepo.get_revision(version) | |
145 # populate parent id cache | |
146 if not rev.parent_ids: | |
147 parents = [] | |
148 self._parentids[version] = (revision.NULL_REVISION,) | |
149 else: | |
150 parents = self._filterghosts(rev.parent_ids) | |
151 self._parentids[version] = parents | |
152 | |
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153 branch = self.recode(rev.properties.get('branch-nick', u'default')) |
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154 if branch == 'trunk': |
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155 branch = 'default' |
7053 | 156 return commit(parents=parents, |
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157 date='%d %d' % (rev.timestamp, -rev.timezone), |
7053 | 158 author=self.recode(rev.committer), |
159 desc=self.recode(rev.message), | |
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160 branch=branch, |
7053 | 161 rev=version) |
162 | |
163 def gettags(self): | |
164 bytetags = {} | |
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165 for branch in self.sourcerepo.find_branches(): |
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166 if not branch.supports_tags(): |
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167 return {} |
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168 tagdict = branch.tags.get_tag_dict() |
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169 for name, rev in tagdict.iteritems(): |
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170 bytetags[self.recode(name)] = rev |
7053 | 171 return bytetags |
172 | |
173 def getchangedfiles(self, rev, i): | |
174 self._modecache = {} | |
175 curtree = self.sourcerepo.revision_tree(rev) | |
176 if i is not None: | |
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177 parentid = self._parentids[rev][i] |
7053 | 178 else: |
179 # no parent id, get the empty revision | |
180 parentid = revision.NULL_REVISION | |
181 | |
182 prevtree = self.sourcerepo.revision_tree(parentid) | |
183 changes = [e[0] for e in self._gettreechanges(curtree, prevtree)[0]] | |
184 return changes | |
185 | |
186 def _gettreechanges(self, current, origin): | |
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187 revid = current._revision_id |
7053 | 188 changes = [] |
189 renames = {} | |
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190 seen = set() |
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191 # Process the entries by reverse lexicographic name order to |
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192 # handle nested renames correctly, most specific first. |
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193 curchanges = sorted(current.iter_changes(origin), |
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194 key=lambda c: c[1][0] or c[1][1], |
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195 reverse=True) |
7053 | 196 for (fileid, paths, changed_content, versioned, parent, name, |
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197 kind, executable) in curchanges: |
7053 | 198 |
199 if paths[0] == u'' or paths[1] == u'': | |
200 # ignore changes to tree root | |
201 continue | |
202 | |
203 # bazaar tracks directories, mercurial does not, so | |
204 # we have to rename the directory contents | |
205 if kind[1] == 'directory': | |
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206 if kind[0] not in (None, 'directory'): |
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207 # Replacing 'something' with a directory, record it |
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208 # so it can be removed. |
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209 changes.append((self.recode(paths[0]), revid)) |
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210 |
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211 if kind[0] == 'directory' and None not in paths: |
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212 renaming = paths[0] != paths[1] |
7053 | 213 # neither an add nor an delete - a move |
214 # rename all directory contents manually | |
215 subdir = origin.inventory.path2id(paths[0]) | |
216 # get all child-entries of the directory | |
217 for name, entry in origin.inventory.iter_entries(subdir): | |
218 # hg does not track directory renames | |
219 if entry.kind == 'directory': | |
220 continue | |
221 frompath = self.recode(paths[0] + '/' + name) | |
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222 if frompath in seen: |
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223 # Already handled by a more specific change entry |
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224 # This is important when you have: |
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225 # a => b |
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226 # a/c => a/c |
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227 # Here a/c must not be renamed into b/c |
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228 continue |
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229 seen.add(frompath) |
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230 if not renaming: |
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231 continue |
7053 | 232 topath = self.recode(paths[1] + '/' + name) |
233 # register the files as changed | |
234 changes.append((frompath, revid)) | |
235 changes.append((topath, revid)) | |
236 # add to mode cache | |
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237 mode = ((entry.executable and 'x') |
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238 or (entry.kind == 'symlink' and 's') |
7053 | 239 or '') |
240 self._modecache[(topath, revid)] = mode | |
241 # register the change as move | |
242 renames[topath] = frompath | |
243 | |
244 # no futher changes, go to the next change | |
245 continue | |
246 | |
247 # we got unicode paths, need to convert them | |
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248 path, topath = paths |
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249 if path is not None: |
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250 path = self.recode(path) |
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251 if topath is not None: |
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252 topath = self.recode(topath) |
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253 seen.add(path or topath) |
7053 | 254 |
255 if topath is None: | |
256 # file deleted | |
257 changes.append((path, revid)) | |
258 continue | |
259 | |
260 # renamed | |
261 if path and path != topath: | |
262 renames[topath] = path | |
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263 changes.append((path, revid)) |
7053 | 264 |
265 # populate the mode cache | |
266 kind, executable = [e[1] for e in (kind, executable)] | |
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267 mode = ((executable and 'x') or (kind == 'symlink' and 'l') |
7053 | 268 or '') |
269 self._modecache[(topath, revid)] = mode | |
270 changes.append((topath, revid)) | |
271 | |
272 return changes, renames | |
273 | |
274 def _filterghosts(self, ids): | |
275 """Filters out ghost revisions which hg does not support, see | |
276 <http://bazaar-vcs.org/GhostRevision> | |
277 """ | |
278 parentmap = self.sourcerepo.get_parent_map(ids) | |
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279 parents = tuple([parent for parent in ids if parent in parentmap]) |
7053 | 280 return parents |