Mercurial > hg
annotate hgext/convert/bzr.py @ 35176:671aba341d90
convert: save an indicator of the repo type for sources and sinks
This seems like basic info to have, and will be used shortly when deciding
whether or not to wrap the class for lfs conversions.
The other option is to just add a function to each class. But this seems better
in that the strings aren't duplicated, and the constructor for most of these
will run even if the VCS isn't installed, so it's easier to catch errors.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Wed, 22 Nov 2017 20:49:01 -0500 |
parents | 6bda8a9d8431 |
children | 15d38e8fcb1e |
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 |
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14 from mercurial.i18n import _ |
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15 from mercurial import ( |
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16 demandimport, |
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17 error |
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18 ) |
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19 from . import common |
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20 |
7053 | 21 # these do not work with demandimport, blacklist |
22 demandimport.ignore.extend([ | |
23 'bzrlib.transactions', | |
24 'bzrlib.urlutils', | |
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25 'ElementPath', |
7053 | 26 ]) |
27 | |
28 try: | |
29 # bazaar imports | |
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30 import bzrlib.bzrdir |
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31 import bzrlib.errors |
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32 import bzrlib.revision |
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33 import bzrlib.revisionspec |
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34 bzrdir = bzrlib.bzrdir |
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35 errors = bzrlib.errors |
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36 revision = bzrlib.revision |
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37 revisionspec = bzrlib.revisionspec |
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38 revisionspec.RevisionSpec |
7053 | 39 except ImportError: |
40 pass | |
41 | |
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42 supportedkinds = ('file', 'symlink') |
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43 |
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44 class bzr_source(common.converter_source): |
7053 | 45 """Reads Bazaar repositories by using the Bazaar Python libraries""" |
46 | |
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47 def __init__(self, ui, repotype, path, revs=None): |
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48 super(bzr_source, self).__init__(ui, repotype, path, revs=revs) |
7053 | 49 |
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50 if not os.path.exists(os.path.join(path, '.bzr')): |
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51 raise common.NoRepo(_('%s does not look like a Bazaar repository') |
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52 % path) |
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53 |
7053 | 54 try: |
55 # access bzrlib stuff | |
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56 bzrdir |
7053 | 57 except NameError: |
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58 raise common.NoRepo(_('Bazaar modules could not be loaded')) |
7053 | 59 |
60 path = os.path.abspath(path) | |
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61 self._checkrepotype(path) |
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62 try: |
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63 self.sourcerepo = bzrdir.BzrDir.open(path).open_repository() |
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64 except errors.NoRepositoryPresent: |
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65 raise common.NoRepo(_('%s does not look like a Bazaar repository') |
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66 % path) |
7053 | 67 self._parentids = {} |
68 | |
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69 def _checkrepotype(self, path): |
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70 # Lightweight checkouts detection is informational but probably |
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71 # fragile at API level. It should not terminate the conversion. |
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72 try: |
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73 dir = bzrdir.BzrDir.open_containing(path)[0] |
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74 try: |
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75 tree = dir.open_workingtree(recommend_upgrade=False) |
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76 branch = tree.branch |
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77 except (errors.NoWorkingTree, errors.NotLocalUrl): |
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78 tree = None |
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79 branch = dir.open_branch() |
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80 if (tree is not None and tree.bzrdir.root_transport.base != |
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81 branch.bzrdir.root_transport.base): |
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82 self.ui.warn(_('warning: lightweight checkouts may cause ' |
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83 'conversion failures, try with a regular ' |
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84 'branch instead.\n')) |
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85 except Exception: |
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86 self.ui.note(_('bzr source type could not be determined\n')) |
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87 |
7053 | 88 def before(self): |
89 """Before the conversion begins, acquire a read lock | |
90 for all the operations that might need it. Fortunately | |
91 read locks don't block other reads or writes to the | |
92 repository, so this shouldn't have any impact on the usage of | |
93 the source repository. | |
94 | |
95 The alternative would be locking on every operation that | |
96 needs locks (there are currently two: getting the file and | |
97 getting the parent map) and releasing immediately after, | |
98 but this approach can take even 40% longer.""" | |
99 self.sourcerepo.lock_read() | |
100 | |
101 def after(self): | |
102 self.sourcerepo.unlock() | |
103 | |
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104 def _bzrbranches(self): |
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105 return self.sourcerepo.find_branches(using=True) |
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106 |
7053 | 107 def getheads(self): |
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108 if not self.revs: |
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109 # Set using=True to avoid nested repositories (see issue3254) |
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110 heads = sorted([b.last_revision() for b in self._bzrbranches()]) |
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111 else: |
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112 revid = None |
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113 for branch in self._bzrbranches(): |
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114 try: |
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115 r = revisionspec.RevisionSpec.from_string(self.revs[0]) |
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116 info = r.in_history(branch) |
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117 except errors.BzrError: |
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118 pass |
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119 revid = info.rev_id |
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120 if revid is None: |
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121 raise error.Abort(_('%s is not a valid revision') |
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122 % self.revs[0]) |
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123 heads = [revid] |
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124 # Empty repositories return 'null:', which cannot be retrieved |
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125 heads = [h for h in heads if h != 'null:'] |
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126 return heads |
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128 def getfile(self, name, rev): | |
129 revtree = self.sourcerepo.revision_tree(rev) | |
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130 fileid = revtree.path2id(name.decode(self.encoding or 'utf-8')) |
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131 kind = None |
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132 if fileid is not None: |
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133 kind = revtree.kind(fileid) |
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134 if kind not in supportedkinds: |
7053 | 135 # the file is not available anymore - was deleted |
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136 return None, None |
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137 mode = self._modecache[(name, rev)] |
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138 if kind == 'symlink': |
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139 target = revtree.get_symlink_target(fileid) |
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140 if target is None: |
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141 raise error.Abort(_('%s.%s symlink has no target') |
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142 % (name, rev)) |
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143 return target, mode |
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144 else: |
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145 sio = revtree.get_file(fileid) |
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146 return sio.read(), mode |
7053 | 147 |
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148 def getchanges(self, version, full): |
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149 if full: |
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150 raise error.Abort(_("convert from cvs does not support --full")) |
7053 | 151 self._modecache = {} |
152 self._revtree = self.sourcerepo.revision_tree(version) | |
153 # get the parentids from the cache | |
154 parentids = self._parentids.pop(version) | |
155 # only diff against first parent id | |
156 prevtree = self.sourcerepo.revision_tree(parentids[0]) | |
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157 files, changes = self._gettreechanges(self._revtree, prevtree) |
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158 return files, changes, set() |
7053 | 159 |
160 def getcommit(self, version): | |
161 rev = self.sourcerepo.get_revision(version) | |
162 # populate parent id cache | |
163 if not rev.parent_ids: | |
164 parents = [] | |
165 self._parentids[version] = (revision.NULL_REVISION,) | |
166 else: | |
167 parents = self._filterghosts(rev.parent_ids) | |
168 self._parentids[version] = parents | |
169 | |
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170 branch = self.recode(rev.properties.get('branch-nick', u'default')) |
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171 if branch == 'trunk': |
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172 branch = 'default' |
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173 return common.commit(parents=parents, |
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174 date='%d %d' % (rev.timestamp, -rev.timezone), |
7053 | 175 author=self.recode(rev.committer), |
176 desc=self.recode(rev.message), | |
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177 branch=branch, |
7053 | 178 rev=version) |
179 | |
180 def gettags(self): | |
181 bytetags = {} | |
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182 for branch in self._bzrbranches(): |
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183 if not branch.supports_tags(): |
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184 return {} |
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185 tagdict = branch.tags.get_tag_dict() |
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186 for name, rev in tagdict.iteritems(): |
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187 bytetags[self.recode(name)] = rev |
7053 | 188 return bytetags |
189 | |
190 def getchangedfiles(self, rev, i): | |
191 self._modecache = {} | |
192 curtree = self.sourcerepo.revision_tree(rev) | |
193 if i is not None: | |
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194 parentid = self._parentids[rev][i] |
7053 | 195 else: |
196 # no parent id, get the empty revision | |
197 parentid = revision.NULL_REVISION | |
198 | |
199 prevtree = self.sourcerepo.revision_tree(parentid) | |
200 changes = [e[0] for e in self._gettreechanges(curtree, prevtree)[0]] | |
201 return changes | |
202 | |
203 def _gettreechanges(self, current, origin): | |
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204 revid = current._revision_id |
7053 | 205 changes = [] |
206 renames = {} | |
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207 seen = set() |
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208 # Process the entries by reverse lexicographic name order to |
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209 # handle nested renames correctly, most specific first. |
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210 curchanges = sorted(current.iter_changes(origin), |
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211 key=lambda c: c[1][0] or c[1][1], |
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212 reverse=True) |
7053 | 213 for (fileid, paths, changed_content, versioned, parent, name, |
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214 kind, executable) in curchanges: |
7053 | 215 |
216 if paths[0] == u'' or paths[1] == u'': | |
217 # ignore changes to tree root | |
218 continue | |
219 | |
220 # bazaar tracks directories, mercurial does not, so | |
221 # we have to rename the directory contents | |
222 if kind[1] == 'directory': | |
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223 if kind[0] not in (None, 'directory'): |
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224 # Replacing 'something' with a directory, record it |
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225 # so it can be removed. |
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226 changes.append((self.recode(paths[0]), revid)) |
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227 |
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228 if kind[0] == 'directory' and None not in paths: |
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229 renaming = paths[0] != paths[1] |
7053 | 230 # neither an add nor an delete - a move |
231 # rename all directory contents manually | |
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232 subdir = origin.root_inventory.path2id(paths[0]) |
7053 | 233 # get all child-entries of the directory |
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234 for name, entry in origin.root_inventory.iter_entries( |
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235 subdir): |
7053 | 236 # hg does not track directory renames |
237 if entry.kind == 'directory': | |
238 continue | |
239 frompath = self.recode(paths[0] + '/' + name) | |
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240 if frompath in seen: |
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241 # Already handled by a more specific change entry |
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242 # This is important when you have: |
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243 # a => b |
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244 # a/c => a/c |
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245 # Here a/c must not be renamed into b/c |
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246 continue |
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247 seen.add(frompath) |
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248 if not renaming: |
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249 continue |
7053 | 250 topath = self.recode(paths[1] + '/' + name) |
251 # register the files as changed | |
252 changes.append((frompath, revid)) | |
253 changes.append((topath, revid)) | |
254 # add to mode cache | |
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255 mode = ((entry.executable and 'x') |
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256 or (entry.kind == 'symlink' and 's') |
7053 | 257 or '') |
258 self._modecache[(topath, revid)] = mode | |
259 # register the change as move | |
260 renames[topath] = frompath | |
261 | |
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262 # no further changes, go to the next change |
7053 | 263 continue |
264 | |
265 # we got unicode paths, need to convert them | |
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266 path, topath = paths |
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267 if path is not None: |
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268 path = self.recode(path) |
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269 if topath is not None: |
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270 topath = self.recode(topath) |
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271 seen.add(path or topath) |
7053 | 272 |
273 if topath is None: | |
274 # file deleted | |
275 changes.append((path, revid)) | |
276 continue | |
277 | |
278 # renamed | |
279 if path and path != topath: | |
280 renames[topath] = path | |
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281 changes.append((path, revid)) |
7053 | 282 |
283 # populate the mode cache | |
284 kind, executable = [e[1] for e in (kind, executable)] | |
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285 mode = ((executable and 'x') or (kind == 'symlink' and 'l') |
7053 | 286 or '') |
287 self._modecache[(topath, revid)] = mode | |
288 changes.append((topath, revid)) | |
289 | |
290 return changes, renames | |
291 | |
292 def _filterghosts(self, ids): | |
293 """Filters out ghost revisions which hg does not support, see | |
294 <http://bazaar-vcs.org/GhostRevision> | |
295 """ | |
296 parentmap = self.sourcerepo.get_parent_map(ids) | |
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297 parents = tuple([parent for parent in ids if parent in parentmap]) |
7053 | 298 return parents |