This is a followup to 7fc35e0e94,
(workaround a for broken symlinks in SVN).
Since broken SVN clients can commit svn:special files without
the magic "link " prefix, this can affect delta application
when we update the broken svn:special file. So now we fall
back and retry the delta application on symlinks if having
a "link " prefix fails.
Our behavior differs from svn(1) (v1.5.1) slightly:
When a svn:special file is created w/o a "link " prefix, svn
will create a regular file (mode 100644 to git) with the
contents of the blob as-is.
Our behavior is to continue creating the symlink (mode 120000
to git) with the contents of the blob as-is. While this
differs from current svn(1) behavior, this is easier and more
efficient to implement (and the correctness of the svn(1) is
debatable, since it's a workaround for a bug in the first
place).
More information on this SVN bug is described here:
http://subversion.tigris.org/issues/show_bug.cgi?id=2692
Signed-off-by: Eric Wong <normalperson@yhbt.net>
