API deficiencies

[Chia-liang Kao <cl...@clkao.org>]

Hi,

Time to update my list of wanted API.

1. Given (path, rev), find (path', rev', rev'') where (path',rev') was copied to 
   (path, rev''). [#1970] #DONE#

2. A version of repos_dir_delta that preserves copies, rather than expanding 
   everything as plain add. 

   A workaround is described in http://svn.haxx.se/users/archive-2005-08/0812.shtml,
   making heavy use of (1).

3. ra api for (2). 

  Though the above mentioned workaround can also be applied with ra, but it
  is not going to avoid unnecessary traffic over wire.

4. Given (path, rev) which is a non-existing node, find the latest existing node 
   (path, rev')  that (path, rev'+1) doesn't exist. 

5. atomic revprop along with commits made with ra_get_commit_editor.

   You can do this with txn_prop with fs layer, but there's no way to set txnprop
   over ra. 

Cheers,
CLK



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