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Code Issues Releases Wiki Activity

Avoid path change collision issue when diffing an unusual edge case out of

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svn.

Summary: when you "svn cp" with a revision, we end up with some path collision
problems. This isn't a complete fix but it gets the change to Differential,
at least.

Test Plan:

Reviewers:

CC:
This commit is contained in:
epriestley 2011-01-10 12:41:58 -08:00
parent 10b0a553b4
commit f071a55266
1 changed files with 16 additions and 0 deletions
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16
src/parser/diff/ArcanistDiffParser.php
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@ -90,6 +90,22 @@ class ArcanistDiffParser {
}
$cpath = $info['Copied From URL'];
$cpath = substr($cpath, strlen($root));
if ($info['Copied From Rev']) {
// The user can "svn cp /path/to/file@12345 x", which pulls a file out
// of version history at a specific revision. If we just use the path,
// we'll collide with possible changes to that path in the working
// copy below. In particular, "svn cp"-ing a path which no longer
// exists somewhere in the working copy and then adding that path
// gets us to the "origin change type" branches below with a
// TYPE_ADD state on the path. To avoid this, append the origin
// revision to the path so we'll necessarily generate a new change.
// TODO: In theory, you could have an '@' in your path and this could
// cause a collision, e.g. two files named 'f' and 'f@12345'. This is
// at least somewhat the user's fault, though.
if ($info['Copied From Rev'] != $info['Revision']) {
$cpath .= '@'.$info['Copied From Rev'];
}
}
$change->setOldPath($cpath);
$from[$path] = $cpath;