Mercurial > hg
annotate hgext/convert/bzr.py @ 15611:ec8a49c46d7e
merge with stable
author | Matt Mackall <mpm@selenic.com> |
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date | Mon, 05 Dec 2011 17:48:40 -0600 |
parents | 6ba2fc0a87ab |
children | f5b6046f6ce8 |
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 | |
26 from bzrlib import branch, revision, errors | |
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 | |
45 branch | |
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) |
7053 | 51 self.branch = branch.Branch.open(path) |
52 self.sourcerepo = self.branch.repository | |
53 self._parentids = {} | |
54 | |
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55 def _checkrepotype(self, path): |
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56 # Lightweight checkouts detection is informational but probably |
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57 # fragile at API level. It should not terminate the conversion. |
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58 try: |
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59 from bzrlib import bzrdir |
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60 dir = bzrdir.BzrDir.open_containing(path)[0] |
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61 try: |
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62 tree = dir.open_workingtree(recommend_upgrade=False) |
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63 branch = tree.branch |
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64 except (errors.NoWorkingTree, errors.NotLocalUrl): |
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65 tree = None |
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66 branch = dir.open_branch() |
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67 if (tree is not None and tree.bzrdir.root_transport.base != |
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68 branch.bzrdir.root_transport.base): |
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69 self.ui.warn(_('warning: lightweight checkouts may cause ' |
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70 'conversion failures, try with a regular ' |
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71 'branch instead.\n')) |
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72 except: |
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73 self.ui.note(_('bzr source type could not be determined\n')) |
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74 |
7053 | 75 def before(self): |
76 """Before the conversion begins, acquire a read lock | |
77 for all the operations that might need it. Fortunately | |
78 read locks don't block other reads or writes to the | |
79 repository, so this shouldn't have any impact on the usage of | |
80 the source repository. | |
81 | |
82 The alternative would be locking on every operation that | |
83 needs locks (there are currently two: getting the file and | |
84 getting the parent map) and releasing immediately after, | |
85 but this approach can take even 40% longer.""" | |
86 self.sourcerepo.lock_read() | |
87 | |
88 def after(self): | |
89 self.sourcerepo.unlock() | |
90 | |
91 def getheads(self): | |
92 if not self.rev: | |
93 return [self.branch.last_revision()] | |
94 try: | |
95 r = RevisionSpec.from_string(self.rev) | |
96 info = r.in_history(self.branch) | |
97 except errors.BzrError: | |
98 raise util.Abort(_('%s is not a valid revision in current branch') | |
99 % self.rev) | |
100 return [info.rev_id] | |
101 | |
102 def getfile(self, name, rev): | |
103 revtree = self.sourcerepo.revision_tree(rev) | |
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104 fileid = revtree.path2id(name.decode(self.encoding or 'utf-8')) |
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105 kind = None |
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106 if fileid is not None: |
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107 kind = revtree.kind(fileid) |
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108 if kind not in supportedkinds: |
7053 | 109 # the file is not available anymore - was deleted |
110 raise IOError(_('%s is not available in %s anymore') % | |
111 (name, rev)) | |
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112 mode = self._modecache[(name, rev)] |
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113 if kind == 'symlink': |
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114 target = revtree.get_symlink_target(fileid) |
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115 if target is None: |
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116 raise util.Abort(_('%s.%s symlink has no target') |
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117 % (name, rev)) |
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118 return target, mode |
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119 else: |
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120 sio = revtree.get_file(fileid) |
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121 return sio.read(), mode |
7053 | 122 |
123 def getchanges(self, version): | |
124 # set up caches: modecache and revtree | |
125 self._modecache = {} | |
126 self._revtree = self.sourcerepo.revision_tree(version) | |
127 # get the parentids from the cache | |
128 parentids = self._parentids.pop(version) | |
129 # only diff against first parent id | |
130 prevtree = self.sourcerepo.revision_tree(parentids[0]) | |
131 return self._gettreechanges(self._revtree, prevtree) | |
132 | |
133 def getcommit(self, version): | |
134 rev = self.sourcerepo.get_revision(version) | |
135 # populate parent id cache | |
136 if not rev.parent_ids: | |
137 parents = [] | |
138 self._parentids[version] = (revision.NULL_REVISION,) | |
139 else: | |
140 parents = self._filterghosts(rev.parent_ids) | |
141 self._parentids[version] = parents | |
142 | |
143 return commit(parents=parents, | |
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144 date='%d %d' % (rev.timestamp, -rev.timezone), |
7053 | 145 author=self.recode(rev.committer), |
146 # bzr returns bytestrings or unicode, depending on the content | |
147 desc=self.recode(rev.message), | |
148 rev=version) | |
149 | |
150 def gettags(self): | |
151 if not self.branch.supports_tags(): | |
152 return {} | |
153 tagdict = self.branch.tags.get_tag_dict() | |
154 bytetags = {} | |
155 for name, rev in tagdict.iteritems(): | |
156 bytetags[self.recode(name)] = rev | |
157 return bytetags | |
158 | |
159 def getchangedfiles(self, rev, i): | |
160 self._modecache = {} | |
161 curtree = self.sourcerepo.revision_tree(rev) | |
162 if i is not None: | |
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163 parentid = self._parentids[rev][i] |
7053 | 164 else: |
165 # no parent id, get the empty revision | |
166 parentid = revision.NULL_REVISION | |
167 | |
168 prevtree = self.sourcerepo.revision_tree(parentid) | |
169 changes = [e[0] for e in self._gettreechanges(curtree, prevtree)[0]] | |
170 return changes | |
171 | |
172 def _gettreechanges(self, current, origin): | |
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173 revid = current._revision_id |
7053 | 174 changes = [] |
175 renames = {} | |
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176 seen = set() |
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177 # Process the entries by reverse lexicographic name order to |
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178 # handle nested renames correctly, most specific first. |
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179 curchanges = sorted(current.iter_changes(origin), |
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180 key=lambda c: c[1][0] or c[1][1], |
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181 reverse=True) |
7053 | 182 for (fileid, paths, changed_content, versioned, parent, name, |
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183 kind, executable) in curchanges: |
7053 | 184 |
185 if paths[0] == u'' or paths[1] == u'': | |
186 # ignore changes to tree root | |
187 continue | |
188 | |
189 # bazaar tracks directories, mercurial does not, so | |
190 # we have to rename the directory contents | |
191 if kind[1] == 'directory': | |
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192 if kind[0] not in (None, 'directory'): |
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193 # Replacing 'something' with a directory, record it |
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194 # so it can be removed. |
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195 changes.append((self.recode(paths[0]), revid)) |
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196 |
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197 if kind[0] == 'directory' and None not in paths: |
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198 renaming = paths[0] != paths[1] |
7053 | 199 # neither an add nor an delete - a move |
200 # rename all directory contents manually | |
201 subdir = origin.inventory.path2id(paths[0]) | |
202 # get all child-entries of the directory | |
203 for name, entry in origin.inventory.iter_entries(subdir): | |
204 # hg does not track directory renames | |
205 if entry.kind == 'directory': | |
206 continue | |
207 frompath = self.recode(paths[0] + '/' + name) | |
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208 if frompath in seen: |
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209 # Already handled by a more specific change entry |
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210 # This is important when you have: |
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211 # a => b |
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212 # a/c => a/c |
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213 # Here a/c must not be renamed into b/c |
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214 continue |
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215 seen.add(frompath) |
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216 if not renaming: |
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217 continue |
7053 | 218 topath = self.recode(paths[1] + '/' + name) |
219 # register the files as changed | |
220 changes.append((frompath, revid)) | |
221 changes.append((topath, revid)) | |
222 # add to mode cache | |
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223 mode = ((entry.executable and 'x') |
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224 or (entry.kind == 'symlink' and 's') |
7053 | 225 or '') |
226 self._modecache[(topath, revid)] = mode | |
227 # register the change as move | |
228 renames[topath] = frompath | |
229 | |
230 # no futher changes, go to the next change | |
231 continue | |
232 | |
233 # we got unicode paths, need to convert them | |
234 path, topath = [self.recode(part) for part in paths] | |
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235 seen.add(path or topath) |
7053 | 236 |
237 if topath is None: | |
238 # file deleted | |
239 changes.append((path, revid)) | |
240 continue | |
241 | |
242 # renamed | |
243 if path and path != topath: | |
244 renames[topath] = path | |
8035
cb77c0fbec39
convert: remove renamed source files (issue1505)
Xavier ALT <dex@phoenix-ind.net>
parents:
7060
diff
changeset
|
245 changes.append((path, revid)) |
7053 | 246 |
247 # populate the mode cache | |
248 kind, executable = [e[1] for e in (kind, executable)] | |
8148
adce97d28389
convert/bzr: fix symlink handling (issue1626)
Patrick Mezard <pmezard@gmail.com>
parents:
8126
diff
changeset
|
249 mode = ((executable and 'x') or (kind == 'symlink' and 'l') |
7053 | 250 or '') |
251 self._modecache[(topath, revid)] = mode | |
252 changes.append((topath, revid)) | |
253 | |
254 return changes, renames | |
255 | |
256 def _filterghosts(self, ids): | |
257 """Filters out ghost revisions which hg does not support, see | |
258 <http://bazaar-vcs.org/GhostRevision> | |
259 """ | |
260 parentmap = self.sourcerepo.get_parent_map(ids) | |
7060
972cce34f345
convert: fixed python2.3 incompatibility in bzr source (generator expression)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents:
7053
diff
changeset
|
261 parents = tuple([parent for parent in ids if parent in parentmap]) |
7053 | 262 return parents |
263 | |
264 def recode(self, s, encoding=None): | |
265 """This version of recode tries to encode unicode to bytecode, | |
266 and preferably using the UTF-8 codec. | |
267 Other types than Unicode are silently returned, this is by | |
268 intention, e.g. the None-type is not going to be encoded but instead | |
269 just passed through | |
270 """ | |
271 if not encoding: | |
272 encoding = self.encoding or 'utf-8' | |
273 | |
274 if isinstance(s, unicode): | |
275 return s.encode(encoding) | |
276 else: | |
277 # leave it alone | |
278 return s |