postinst is in scim-bridge-agent 0.4.16-2ubuntu5.
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  | #!/bin/sh
set -e
ua_inst () {
	update-alternatives \
        --install /etc/X11/xinit/xinput.d/$1 xinput-$1 \
        /etc/X11/xinit/xinput.d/$2 $3 ;
}
case "$1" in
    configure)
        #ua_inst all_ALL scim-bridge  0
        ua_inst ja_JP   scim-bridge 60
        ua_inst ko_KR   scim-bridge 60
        ua_inst zh_CN   scim-bridge 60
        ua_inst zh_TW   scim-bridge 60
        ua_inst zh_HK   scim-bridge 60
        ua_inst zh_SG   scim-bridge 60
    ;;
    abort-upgrade|abort-remove|abort-deconfigure)
    ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
 |