Mercurial > hg
annotate hgext/convert/bzr.py @ 28757:93bf61913f33
hghave: add docstring for check
author | timeless <timeless@mozdev.org> |
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date | Mon, 04 Apr 2016 02:17:36 +0000 |
parents | d62b00318c19 |
children | a0939666b836 |
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 | |
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10 from __future__ import absolute_import |
7053 | 11 |
12 import os | |
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13 from mercurial import ( |
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14 demandimport, |
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15 error |
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16 ) |
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17 from mercurial.i18n import _ |
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18 from . import common |
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19 |
7053 | 20 # these do not work with demandimport, blacklist |
21 demandimport.ignore.extend([ | |
22 'bzrlib.transactions', | |
23 'bzrlib.urlutils', | |
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24 'ElementPath', |
7053 | 25 ]) |
26 | |
27 try: | |
28 # bazaar imports | |
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29 import bzrlib.bzrdir |
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30 import bzrlib.errors |
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31 import bzrlib.revision |
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32 import bzrlib.revisionspec.RevisionSpec |
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33 bzrdir = bzrlib.bzrdir |
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34 errors = bzrlib.errors |
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35 revision = bzrlib.revision |
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36 revisionspec = bzrlib.revisionspec |
7053 | 37 except ImportError: |
38 pass | |
39 | |
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40 supportedkinds = ('file', 'symlink') |
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41 |
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42 class bzr_source(common.converter_source): |
7053 | 43 """Reads Bazaar repositories by using the Bazaar Python libraries""" |
44 | |
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45 def __init__(self, ui, path, revs=None): |
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46 super(bzr_source, self).__init__(ui, path, revs=revs) |
7053 | 47 |
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48 if not os.path.exists(os.path.join(path, '.bzr')): |
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49 raise common.NoRepo(_('%s does not look like a Bazaar repository') |
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50 % path) |
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51 |
7053 | 52 try: |
53 # access bzrlib stuff | |
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54 bzrdir |
7053 | 55 except NameError: |
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56 raise common.NoRepo(_('Bazaar modules could not be loaded')) |
7053 | 57 |
58 path = os.path.abspath(path) | |
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59 self._checkrepotype(path) |
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60 try: |
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61 self.sourcerepo = bzrdir.BzrDir.open(path).open_repository() |
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62 except errors.NoRepositoryPresent: |
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63 raise common.NoRepo(_('%s does not look like a Bazaar repository') |
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64 % path) |
7053 | 65 self._parentids = {} |
66 | |
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67 def _checkrepotype(self, path): |
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68 # Lightweight checkouts detection is informational but probably |
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69 # fragile at API level. It should not terminate the conversion. |
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70 try: |
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71 dir = bzrdir.BzrDir.open_containing(path)[0] |
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72 try: |
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73 tree = dir.open_workingtree(recommend_upgrade=False) |
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74 branch = tree.branch |
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75 except (errors.NoWorkingTree, errors.NotLocalUrl): |
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76 tree = None |
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77 branch = dir.open_branch() |
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78 if (tree is not None and tree.bzrdir.root_transport.base != |
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79 branch.bzrdir.root_transport.base): |
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80 self.ui.warn(_('warning: lightweight checkouts may cause ' |
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81 'conversion failures, try with a regular ' |
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82 'branch instead.\n')) |
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83 except Exception: |
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84 self.ui.note(_('bzr source type could not be determined\n')) |
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85 |
7053 | 86 def before(self): |
87 """Before the conversion begins, acquire a read lock | |
88 for all the operations that might need it. Fortunately | |
89 read locks don't block other reads or writes to the | |
90 repository, so this shouldn't have any impact on the usage of | |
91 the source repository. | |
92 | |
93 The alternative would be locking on every operation that | |
94 needs locks (there are currently two: getting the file and | |
95 getting the parent map) and releasing immediately after, | |
96 but this approach can take even 40% longer.""" | |
97 self.sourcerepo.lock_read() | |
98 | |
99 def after(self): | |
100 self.sourcerepo.unlock() | |
101 | |
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102 def _bzrbranches(self): |
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103 return self.sourcerepo.find_branches(using=True) |
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104 |
7053 | 105 def getheads(self): |
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106 if not self.revs: |
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107 # Set using=True to avoid nested repositories (see issue3254) |
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108 heads = sorted([b.last_revision() for b in self._bzrbranches()]) |
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109 else: |
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110 revid = None |
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111 for branch in self._bzrbranches(): |
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112 try: |
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113 r = revisionspec.RevisionSpec.from_string(self.revs[0]) |
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114 info = r.in_history(branch) |
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115 except errors.BzrError: |
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116 pass |
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117 revid = info.rev_id |
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118 if revid is None: |
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119 raise error.Abort(_('%s is not a valid revision') |
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120 % self.revs[0]) |
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121 heads = [revid] |
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122 # Empty repositories return 'null:', which cannot be retrieved |
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123 heads = [h for h in heads if h != 'null:'] |
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124 return heads |
7053 | 125 |
126 def getfile(self, name, rev): | |
127 revtree = self.sourcerepo.revision_tree(rev) | |
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128 fileid = revtree.path2id(name.decode(self.encoding or 'utf-8')) |
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129 kind = None |
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130 if fileid is not None: |
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131 kind = revtree.kind(fileid) |
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132 if kind not in supportedkinds: |
7053 | 133 # the file is not available anymore - was deleted |
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134 return None, None |
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135 mode = self._modecache[(name, rev)] |
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136 if kind == 'symlink': |
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137 target = revtree.get_symlink_target(fileid) |
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138 if target is None: |
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139 raise error.Abort(_('%s.%s symlink has no target') |
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140 % (name, rev)) |
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141 return target, mode |
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142 else: |
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143 sio = revtree.get_file(fileid) |
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144 return sio.read(), mode |
7053 | 145 |
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146 def getchanges(self, version, full): |
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147 if full: |
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148 raise error.Abort(_("convert from cvs does not support --full")) |
7053 | 149 self._modecache = {} |
150 self._revtree = self.sourcerepo.revision_tree(version) | |
151 # get the parentids from the cache | |
152 parentids = self._parentids.pop(version) | |
153 # only diff against first parent id | |
154 prevtree = self.sourcerepo.revision_tree(parentids[0]) | |
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155 files, changes = self._gettreechanges(self._revtree, prevtree) |
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156 return files, changes, set() |
7053 | 157 |
158 def getcommit(self, version): | |
159 rev = self.sourcerepo.get_revision(version) | |
160 # populate parent id cache | |
161 if not rev.parent_ids: | |
162 parents = [] | |
163 self._parentids[version] = (revision.NULL_REVISION,) | |
164 else: | |
165 parents = self._filterghosts(rev.parent_ids) | |
166 self._parentids[version] = parents | |
167 | |
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168 branch = self.recode(rev.properties.get('branch-nick', u'default')) |
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169 if branch == 'trunk': |
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170 branch = 'default' |
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171 return common.commit(parents=parents, |
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172 date='%d %d' % (rev.timestamp, -rev.timezone), |
7053 | 173 author=self.recode(rev.committer), |
174 desc=self.recode(rev.message), | |
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175 branch=branch, |
7053 | 176 rev=version) |
177 | |
178 def gettags(self): | |
179 bytetags = {} | |
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180 for branch in self._bzrbranches(): |
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181 if not branch.supports_tags(): |
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182 return {} |
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183 tagdict = branch.tags.get_tag_dict() |
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184 for name, rev in tagdict.iteritems(): |
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185 bytetags[self.recode(name)] = rev |
7053 | 186 return bytetags |
187 | |
188 def getchangedfiles(self, rev, i): | |
189 self._modecache = {} | |
190 curtree = self.sourcerepo.revision_tree(rev) | |
191 if i is not None: | |
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192 parentid = self._parentids[rev][i] |
7053 | 193 else: |
194 # no parent id, get the empty revision | |
195 parentid = revision.NULL_REVISION | |
196 | |
197 prevtree = self.sourcerepo.revision_tree(parentid) | |
198 changes = [e[0] for e in self._gettreechanges(curtree, prevtree)[0]] | |
199 return changes | |
200 | |
201 def _gettreechanges(self, current, origin): | |
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202 revid = current._revision_id |
7053 | 203 changes = [] |
204 renames = {} | |
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205 seen = set() |
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206 # Process the entries by reverse lexicographic name order to |
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207 # handle nested renames correctly, most specific first. |
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208 curchanges = sorted(current.iter_changes(origin), |
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209 key=lambda c: c[1][0] or c[1][1], |
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210 reverse=True) |
7053 | 211 for (fileid, paths, changed_content, versioned, parent, name, |
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212 kind, executable) in curchanges: |
7053 | 213 |
214 if paths[0] == u'' or paths[1] == u'': | |
215 # ignore changes to tree root | |
216 continue | |
217 | |
218 # bazaar tracks directories, mercurial does not, so | |
219 # we have to rename the directory contents | |
220 if kind[1] == 'directory': | |
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221 if kind[0] not in (None, 'directory'): |
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222 # Replacing 'something' with a directory, record it |
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223 # so it can be removed. |
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224 changes.append((self.recode(paths[0]), revid)) |
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225 |
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226 if kind[0] == 'directory' and None not in paths: |
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227 renaming = paths[0] != paths[1] |
7053 | 228 # neither an add nor an delete - a move |
229 # rename all directory contents manually | |
230 subdir = origin.inventory.path2id(paths[0]) | |
231 # get all child-entries of the directory | |
232 for name, entry in origin.inventory.iter_entries(subdir): | |
233 # hg does not track directory renames | |
234 if entry.kind == 'directory': | |
235 continue | |
236 frompath = self.recode(paths[0] + '/' + name) | |
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237 if frompath in seen: |
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238 # Already handled by a more specific change entry |
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239 # This is important when you have: |
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240 # a => b |
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241 # a/c => a/c |
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242 # Here a/c must not be renamed into b/c |
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243 continue |
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244 seen.add(frompath) |
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245 if not renaming: |
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246 continue |
7053 | 247 topath = self.recode(paths[1] + '/' + name) |
248 # register the files as changed | |
249 changes.append((frompath, revid)) | |
250 changes.append((topath, revid)) | |
251 # add to mode cache | |
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252 mode = ((entry.executable and 'x') |
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253 or (entry.kind == 'symlink' and 's') |
7053 | 254 or '') |
255 self._modecache[(topath, revid)] = mode | |
256 # register the change as move | |
257 renames[topath] = frompath | |
258 | |
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259 # no further changes, go to the next change |
7053 | 260 continue |
261 | |
262 # we got unicode paths, need to convert them | |
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263 path, topath = paths |
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264 if path is not None: |
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265 path = self.recode(path) |
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266 if topath is not None: |
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267 topath = self.recode(topath) |
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268 seen.add(path or topath) |
7053 | 269 |
270 if topath is None: | |
271 # file deleted | |
272 changes.append((path, revid)) | |
273 continue | |
274 | |
275 # renamed | |
276 if path and path != topath: | |
277 renames[topath] = path | |
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278 changes.append((path, revid)) |
7053 | 279 |
280 # populate the mode cache | |
281 kind, executable = [e[1] for e in (kind, executable)] | |
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282 mode = ((executable and 'x') or (kind == 'symlink' and 'l') |
7053 | 283 or '') |
284 self._modecache[(topath, revid)] = mode | |
285 changes.append((topath, revid)) | |
286 | |
287 return changes, renames | |
288 | |
289 def _filterghosts(self, ids): | |
290 """Filters out ghost revisions which hg does not support, see | |
291 <http://bazaar-vcs.org/GhostRevision> | |
292 """ | |
293 parentmap = self.sourcerepo.get_parent_map(ids) | |
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294 parents = tuple([parent for parent in ids if parent in parentmap]) |
7053 | 295 return parents |