Slimmed down and updated version of Ubuntu unminimize script

unminimize_minimal.sh

#!/bin/sh

GREEN="\033[0;32m"
RED="\033[0;31m"
RESET="\033[0m"

echo_ok() {
    echo -e "${GREEN}$@${RESET}"
}

echo_error() {
    echo -e "${RED}$@${RESET}"
}

set -e

if [ -f /etc/dpkg/dpkg.cfg.d/excludes ] || [ -f /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp ]; then
    echo_ok "Re-enabling installation of all documentation in dpkg..."
    if [ -f /etc/dpkg/dpkg.cfg.d/excludes ]; then
        mv /etc/dpkg/dpkg.cfg.d/excludes /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp
    fi
    echo_ok "Updating package list and upgrading packages..."
    apt-get update

    echo_ok "Installing dialog and locales..."
    apt-get install dialog
    apt-get install locales

    echo_ok "Configuring locales..."
    sudo dpkg-reconfigure locales

    # apt-get upgrade asks for confirmation before upgrading packages to let the user stop here
    apt-get upgrade
    echo_ok "Restoring system documentation..."
    echo_ok "Reinstalling packages with files in /usr/share/man/ ..."
    # Reinstallation takes place in two steps because a single dpkg --verified
    # command generates very long parameter list for "xargs dpkg -S" and may go
    # over ARG_MAX. Since many packages have man pages the second download
    # handles a much smaller amount of packages.
    dpkg -S /usr/share/man/ |sed 's|, |\n|g;s|: [^:]*$||' | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
    echo_ok "Reinstalling packages with system documentation in /usr/share/doc/ .."
    # This step processes the packages which still have missing documentation
    dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/doc/ {print $2}' | sed 's|/[^/]*$||' | sort |uniq \
         | xargs dpkg -S | sed 's|, |\n|g;s|: [^:]*$||' | uniq | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
    echo_ok "Restoring system translations..."
    # This step processes the packages which still have missing translations
    dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/locale/ {print $2}' | sed 's|/[^/]*$||' | sort |uniq \
         | xargs dpkg -S | sed 's|, |\n|g;s|: [^:]*$||' | uniq | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
    if dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/doc/ {exit 1}'; then
        echo_ok "Documentation has been restored successfully."
        rm /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp
    else
        echo_error "There are still files missing from /usr/share/doc/:"
        dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/doc/ {print " " $2}'
        echo_error "You may want to try running this script again or you can remove"
        echo_error "/etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp and restore the files manually."
    fi
fi

if  [ "$(dpkg-divert --truename /usr/bin/man)" = "/usr/bin/man.REAL" ]; then
    # Remove diverted man binary
    rm -f /usr/bin/man
    dpkg-divert --quiet --remove --rename /usr/bin/man
fi

echo_ok "Installing man-db..."
apt install man-db

echo_ok "Removing lxd installer package..."
apt-get purge -y lxd-installer

# unminimization succeeded, there is no need to mention it in motd
rm -f /etc/update-motd.d/60-unminimize

echo_ok "Success"