git-svn failure when symlink added in svn

[Seth Falcon <sethfalcon@gmail.com>]

Hi,

A few weeks ago I reported a symlink related error with git-svn and
I've now had a chance to track down a few more details.  The trigger
seems to be if a file is removed from svn and then later added as a
symlink.  The error I get is:

  error: git-checkout-index: unable to create symlink foo.txt (Invalid argument)

This is from the call to symlink(new, path) in entry.c and it seems
that new is ''.

Here is a recipe to reproduce:

## First create an svn repository
  svnadmin create SVN123-repos
  svn co file:///Users/seth/temp/SVN123-repos SVN123
  cd SVN123
  echo 123 > foo.txt
  svn add foo.txt 
  svn ci -m "add a file"

## Now mirror using git-svn
  cd ..
  mkdir GIT123
  cd GIT123/
  git svn init file:///Users/seth/temp/SVN123-repos
  git svn fetch

## Next remove and add a file as a symlink
  cd ..
  cd SVN123
  echo 123 > bar.txt
  svn add bar.txt 
  svn ci -m"add bar"
  svn rm foo.txt 
  svn ci -m "remove foo"
  ln -s bar.txt foo.txt
  svn add foo.txt 
  svn ci -m"add foo as symlink"

## Finally, try to rebase
  cd ../GIT123/
  git svn rebase

git version 1.5.1.53.g77e6f
svn 1.4.0


+ seth