#!/bin/sh

set -e

USER_NAME=clio
GROUP_NAME="${USER_NAME}"
CLIO_EXECUTABLE="clio_server"
CLIO_PREFIX="/opt/clio"
CLIO_BIN="$CLIO_PREFIX/bin/${CLIO_EXECUTABLE}"
CLIO_CONFIG="$CLIO_PREFIX/etc/config.json"

case "$1" in
    configure)
        if ! id -u "$USER_NAME" >/dev/null 2>&1; then
            # Users who should not have a home directory should have their home directory set to /nonexistent
            # https://www.debian.org/doc/debian-policy/ch-opersys.html#non-existent-home-directories
            useradd \
                --system \
                --home-dir /nonexistent \
                --no-create-home \
                --shell /usr/sbin/nologin \
                --comment "system user for ${CLIO_EXECUTABLE}" \
                --user-group \
                ${USER_NAME}
        fi

        install -d -o "$USER_NAME" -g "$GROUP_NAME" /var/log/clio

        if [ -f "$CLIO_CONFIG" ]; then
            chown "$USER_NAME:$GROUP_NAME" "$CLIO_CONFIG"
        fi

        chown -R "$USER_NAME:$GROUP_NAME" "$CLIO_PREFIX"

        ln -sf "$CLIO_BIN" "/usr/bin/${CLIO_EXECUTABLE}"

        ;;
    abort-upgrade|abort-remove|abort-deconfigure)
        ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
        ;;
esac

exit 0