the right way to uninstall /var/games

[Oohara Yuuma <oohara@libra.interq.or.jp>]

I maintain a game which saves its high score in /var/games .
It creates /var/games in its postinst to avoid dpkg -r
"directory not removed because it is not empty" warning.
What is the right way to uninstall /var/games in postrm on purge?
Problems:
1) The package should remove /var/games on purge if necessary because,
   unlike /var/log, /var/games is not a part of base-files .
2) There may be a game such that:
   * it saves its high score in a file in /var/games, not in
     a subdirectory under /var/games
   * it does not create a file in /var/games until the first entry
     of the high score is saved
   If such a game is installed, any other game should not remove
   /var/games even if /var/games is empty.

-- 
Oohara Yuuma <oohara@libra.interq.or.jp>
Debian developer
PGP key (key ID F464A695) http://www.interq.or.jp/libra/oohara/pub-key.txt
Key fingerprint = 6142 8D07 9C5B 159B C170  1F4A 40D6 F42E F464 A695

smile to answer
--- Treasure, "Radiant Silvergun", attitude #3 for SBS-130