get the goods

 Name                                        Last modified      Size  Description
 Parent Directory                                                 -   
 now                                         21-Dec-2004 19:28  227   
 build.2                                     21-Dec-2004 19:27  587   
 kernel-module-devel-2.6.9-1.6_FC2.tar.bz2   21-Dec-2004 18:22  539K  tarball
 kernel-module-devel-2.6.9-1.3_FC2.tar.bz2   21-Nov-2004 12:34  538K  tarball
 build.3                                     19-Nov-2004 12:19  228   
 kernel-module-devel-2.6.9-1.681_FC3.tar.bz2 19-Nov-2004 11:52  482K  tarball
 kmd.py                                      19-Nov-2004 11:48   11K  
 kernel-module-devel-2.6.9-1.678_FC3.tar.bz2 19-Nov-2004 11:33  483K  tarball
 kernel-module-devel-2.6.9-1.667.tar.bz2     08-Nov-2004 10:13  472K  tarball
 kernel-module-devel.spec                    05-Nov-2004 13:40  2.4K  
 kernel-module-devel-2.6.7-1.494.2.2.tar.bz2 05-Nov-2004 13:39  404K  tarball
 kernel-module-devel-2.6.6-1.435.tar.bz2     05-Nov-2004 13:39  392K  tarball
 kernel-module-devel-2.6.6-1.435.2.3.tar.bz2 05-Nov-2004 13:39  393K  tarball
 kernel-module-devel-2.6.6-1.435.2.1.tar.bz2 05-Nov-2004 13:39  393K  tarball
 kernel-module-devel-2.6.6-1.427.tar.bz2     05-Nov-2004 13:39  389K  tarball
 kernel-module-devel-2.6.5-1.358.tar.bz2     05-Nov-2004 13:39  379K  tarball

WHAT TO DO
----------
- create a directory with release-extraversion
  e.g. 2.6.5-1.358
- cd to it
- mkdir rpms
- download the four kernel rpms to rpms/
- kmd.py -u 2.6.5-1.358 rpms/*.rpm
- wait a long time
- tar cjf kernel-module-devel-2.6.5-1.358.tar.bz2 \
    kernel-module-devel-2.6.5-1.358

ALGORITHM
---------
* unpack all x kernel rpms
* get x lists of all files and directories ("paths") under build 
  that are in any of the unpacked rpms
  --> dict A of x sets
* get a list of all paths that appear in all the rpms (even though
  the content could be different)
  --> set B
* get a list of all files that are different in any
  of the four (using diff -Naur from the first to each of the others)
  --> set C
* copy set B to set D, the files that are supposed to be symlinked
* for each of the files from set C, that are different:
  - each file that is different makes it impossible to symlink it from
    the common set -> remove file from D
  - each file makes it impossible to symlink any of its parent directories
    -> remove all parents from D
* for each of the paths in set D, all children of that path still left in
  D can now be removed from set D too, since the children will be in
  the symlinked parent dir
* symlink all paths still in set D to each of the separate target dirs

* for each set in dict A:
  copy all the files that from this set that are in set C to the target dir