prerm is in uwsgi-plugin-lua5.2 2.0.15-10.2ubuntu2.
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 49 50 51 52 53 54 55 56 57 | #!/bin/sh
# prerm script for uwsgi-plugin-lua5.2
#
# see: dh_installdeb(1)
set -e
# summary of how this script can be called:
#        * <prerm> `remove'
#        * <old-prerm> `upgrade' <new-version>
#        * <new-prerm> `failed-upgrade' <old-version>
#        * <conflictor's-prerm> `remove' `in-favour' <package> <new-version>
#        * <deconfigured's-prerm> `deconfigure' `in-favour'
#          <package-being-installed> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
case "$1" in
    remove)
      update-alternatives --quiet \
        --remove \
          uwsgi-plugin-lua \
          /usr/lib/uwsgi/plugins/lua52_plugin.so
      update-alternatives --quiet \
        --remove \
          uwsgi \
          /usr/bin/uwsgi_lua52
      PLUGIN_ALTERNATIVES_COUNT="$(\
        update-alternatives --list uwsgi-plugin-lua 2>/dev/null \
        | wc -l \
      )"
      if [ "$PLUGIN_ALTERNATIVES_COUNT" -eq 0 ]; then
        update-alternatives --quiet \
          --remove \
            uwsgi \
            /usr/bin/uwsgi_lua
      fi
    ;;
    upgrade|deconfigure|failed-upgrade)
    ;;
    *)
        echo "prerm 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
 |