#!/bin/sh

OUT_FILE="$1"
LIST_FILE="$2"
OPKG_SCR="$3"
CONFIGS="$4"
H_REPLACE="$5"

[ -z "$OUT_FILE" ] || [ -z "$LIST_FILE" ] || [ -z "$OPKG_SCR" ] || [ -z "$CONFIGS" ] || [ -z "H_REPLACE" ] && echo "Missing params!" && exit 1

TMP_DIR="/tmp/backup_stack"
rm -rf "$TMP_DIR" && mkdir -p "$TMP_DIR"
COUNT=0

echo "Writing package list..."
$OPKG_SCR write "$LIST_FILE" "$H_REPLACE"

echo "Collecting files..."
for p in $CONFIGS; do
    if [ -e "$p" ]; then
        mkdir -p "$TMP_DIR$(dirname "$p")"
        cp -a "$p" "$TMP_DIR$p"
        echo " [+] $p"
        COUNT=$((COUNT + 1))
    else
        echo " [-] $p (not found)"
    fi
done

echo "Creating archive..."
tar -czf "$OUT_FILE" -C "$TMP_DIR" .
rm -rf "$TMP_DIR"
echo "Total $COUNT config paths saved to $OUT_FILE."