#!/bin/sh -eu
# vim: ts=4 et:

[ -z "$DEBUG" ] || [ "$DEBUG" = 0 ] || set -x

export \
    TARGET=/mnt


die() {
    printf '\033[1;7;31m FATAL: %s \033[0m\n' "$@" >&2  # bold reversed red
    exit 1
}
einfo() {
    printf '\n\033[1;7;36m> %s <\033[0m\n' "$@" >&2     # bold reversed cyan
}

cleanup() {
    # Sweep cruft out of the image that doesn't need to ship or will be
    # re-generated when the image boots
    rm -f \
        "$TARGET/var/cache/apk/"* \
        "$TARGET/etc/resolv.conf" \
        "$TARGET/root/.ash_history" \
        "$TARGET/etc/"*-

    # unmount extra EFI mount
    if [ "$FIRMWARE" = uefi ]; then
      umount "$TARGET/boot/efi"
    fi

    umount \
        "$TARGET/dev" \
        "$TARGET/proc" \
        "$TARGET/sys"

    umount "$TARGET"
}

einfo "Cleaning up and unmounting image volume..."
cleanup
einfo "Done!"