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hg_delta_editor: register copies only if files are unchanged between source and dest
Handle copies of items from revision X into revision Y where X is not the
parent of Y. This cannot happen in Mercurial because copies always happen
between parents and children. A file copy is recorded if:
1- Source and destination revs are in the same branch.
2- The file is unchanged (content, type, removal) through all revisions between
destination and source, not including source and destination.
Directory copies are registered only if the previous rules apply on all copied
items.
[1] is there because file copies across branches are meaningless in Mercurial
world. We could have tried to remap the source rev to a similar one in the
correct branch, but anyway the intent is wrong.
[2] is more questionable but I think it's better this way for we live in a
non-perfect svn world. In theory, 99% of copies out there should come from the
direct parent. But the direct parent is a fuzzy notion when you can have a
working directory composed of different directory at different revisions. So we
assume that stuff copied from past revisions exactly matching the content of
the direct parent revision is really copied from the parent revision. The
alternative would be to discard the copy, which would always happen unless
people kept updating the working directory after every commit (see
tests).
| author | Patrick Mezard <pmezard@gmail.com> |
|---|---|
| date | Wed, 05 Nov 2008 13:37:08 +0100 |
| parents | 496c0354019c |
| children |
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SVN-fs-dump-format-version: 2 UUID: df2126f7-00ab-4d49-b42c-7e981dde0bcf Revision-number: 0 Prop-content-length: 56 Content-length: 56 K 8 svn:date V 27 2008-10-07T22:49:12.059692Z PROPS-END Revision-number: 1 Prop-content-length: 111 Content-length: 111 K 7 svn:log V 11 Empty dirs. K 10 svn:author V 5 durin K 8 svn:date V 27 2008-10-07T22:49:41.118037Z PROPS-END Node-path: branches Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: tags Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Revision-number: 2 Prop-content-length: 108 Content-length: 108 K 7 svn:log V 9 Add alpha K 10 svn:author V 5 durin K 8 svn:date V 27 2008-10-07T23:23:02.991743Z PROPS-END Node-path: trunk/alpha Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 12 Text-content-md5: 3c72ebf8bbd7fa88b1fdcee5398b5a17 Content-length: 22 PROPS-END file: alpha Revision-number: 3 Prop-content-length: 115 Content-length: 115 K 7 svn:log V 15 Add third_party K 10 svn:author V 5 durin K 8 svn:date V 27 2008-10-27T03:16:13.831333Z PROPS-END Node-path: third_party Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: third_party/magic Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: third_party/magic/the_magic_software Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 7 Text-content-md5: bc82cb068ef102a1f4e296992e5979ef Content-length: 17 PROPS-END magic! Revision-number: 4 Prop-content-length: 131 Content-length: 131 K 7 svn:log V 31 Copy magic in from third_party. K 10 svn:author V 5 durin K 8 svn:date V 27 2008-10-27T03:16:32.737023Z PROPS-END Node-path: trunk/magic Node-kind: dir Node-action: add Node-copyfrom-rev: 3 Node-copyfrom-path: third_party/magic Prop-content-length: 34 Content-length: 34 K 13 svn:mergeinfo V 0 PROPS-END