#!/bin/sh

set -e

NEW_DIR="$1"
OLD_DIR="$2"

[ "$OLD_DIR" ] || OLD_DIR='/var/lib/vblade-persist/vblades/'
[ "$NEW_DIR" ] || NEW_DIR='/etc/vblade.conf.d/'

[ -d "$OLD_DIR" ] || exit 0
mkdir -p "$NEW_DIR"

for d in $(find "$OLD_DIR" -mindepth 1 -maxdepth 1 -type d | sort) ; do
    [ -d "$d" ] || continue
    for f in NETIF SHELF SLOT SOURCE ; do
        [ -f "$d/env/$f" ] && continue
        echo "E: Incomplete vblade-persist configuration at '$d', 'env/$f' is missing"
        continue 2
    done
    OLDNAME="$(basename "$d")"
    INSTANCE="vblade.persist.$OLDNAME.conf"
    echo "I: Processing $OLDNAME, will store as $INSTANCE"
    if [ -e "$NEW_DIR/$INSTANCE" ] ; then
        echo "E: A vblade configuration '$NEW_DIR/$INSTANCE' already exists, skipping"
        continue
    fi
    TEMP="$(mktemp --tmpdir="$NEW_DIR" "$INSTANCE.XXXXX")"
    trap "[ -f \"$TEMP\" ] && rm \"$TEMP\"" EXIT
    (
        cat <<__EOS__
#
# Created by $(basename "$0") on $(date)
#
Shelf=$(cat "$d/env/SHELF")
Slot=$(cat "$d/env/SLOT")
NetIf=$(cat "$d/env/NETIF")
Filename=$(cat "$d/env/SOURCE")
Options=$(
    if [ -d "$d/macs" ] ; then
        macs="$(
            find "$d/macs" -type f -iname '[0-9a-f]*' -printf '%f,' |
            sort |
            sed -e 's/,$//'
        )"
        if [ "$macs" ] ; then
            printf '"-m %s"' "$macs"
        fi
    fi
)
# IOSchedulingClass=
# IOSchedulingPriority=
__EOS__
    ) >"$TEMP"
    if ! sh -n "$TEMP" ; then
        echo "F: Conversion of '$d' failed, checking the following script failed:"
        cat "$TEMP" | sed -e 's/^/| /'
        rm "$TEMP"
        exit 1
    fi
    mv "$TEMP" "$NEW_DIR/$INSTANCE"
done

exit 0