del-pkg

#!/bin/sh

set -e # Exit immediately if a command exits with a non-zero status.

usage() {
    echo "usage: $(basename "$0") PKG [PKG...]"
}

#
# Alpine functions
#

del_pkg_alpine() {
    apk --no-cache del "$@"
    rm -rf /var/cache/misc/*
}

#
# Debian functions
#

del_pkg_debian() {
    PKGS=
    for PKG in "$@"
    do
        if ! dpkg --status "$1" 2>&1 | grep -q "^Status: install ok installed"; then
            if [ -f /var/lib/apt/$PKG.virtual ]; then
                PKGS="$PKGS $(cat /var/lib/apt/$PKG.virtual)"
                rm /var/lib/apt/$PKG.virtual
            else
                PKGS="$PKGS $PKG"
            fi
        else
            PKGS="$PKGS $PKG"
        fi
    done

    if [ -n "$PKGS" ]; then
        apt-get -q purge -y $PKGS
        apt-get -q --purge autoremove -y
        rm -rf /var/log/dpkg.log \
               /var/log/apt/*
    fi
}

#
# OS agnostic functions
#

del_pkg() {
    if [ -n "$(which apk)" ]; then
        del_pkg_alpine "$@"
    else
        del_pkg_debian "$@"
    fi
}

#
# Main
#

if [ -z "$1" ]; then
    usage
    exit 1
fi

del_pkg "$@"