preinst is in fonts-takao-mincho 003.02.01-5ubuntu1.
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 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #!/bin/sh
#
# see: dh_installdeb(1)
set -e
OLD_ALT_NAME="ttf-japanese-mincho"
FONT_ENTRY_OTF="/usr/share/fonts/opentype/takao/TakaoPMincho.otf"
CHECK_VERSION=003.02.01-5
FONT_ENTRY="/usr/share/fonts/opentype/takao/TakaoPMincho.ttf"
check_broken_ttf_japanese_mincho()
{
        update-alternatives --remove \
         $OLD_ALT_NAME.ttf \
         $FONT_ENTRY_OTF
}
case "$1" in
    install|upgrade)
	if [ -f $FONT_ENTRY ]; then
	  check_broken_ttf_japanese_mincho
	fi
        if dpkg --compare-versions "$2" lt-nl "$CHECK_VERSION"; then
          update-alternatives --remove $OLD_ALT_NAME.ttf $FONT_ENTRY
        fi
    ;;
    abort-upgrade)
    ;;
    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
 |