preinst is in ghc-doc 7.10.3-7.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #! /bin/sh
set -e
case "$1" in
upgrade|install)
if [ -e /usr/share/doc/ghc-doc/html/libraries/ ] ; then
rm -f /usr/share/doc/ghc-doc/html/libraries/index.html \
/usr/share/doc/ghc-doc/html/libraries/index-frames.html \
/usr/share/doc/ghc-doc/html/libraries/doc-index.html
rmdir --ignore-fail-on-non-empty /usr/share/doc/ghc-doc/html/libraries/
rmdir --ignore-fail-on-non-empty /usr/share/doc/ghc-doc/html/
fi
;;
*)
;;
esac
exit 0
|