#!/bin/sh /etc/rc.common
# /etc/init.d/expand-overlay
# Stage 2: Resize p3 filesystem, format & mount p4, configure Docker.
# Runs at START=98 (before dockerd at 99) so Docker picks up data_root.

START=98

boot() {
	local flag="/etc/resize2fs.done"
	local p4flag="/etc/data-partition.done"

	# ---- Stage 2a: Resize p3 filesystem ----
	if [ ! -f "$flag" ]; then
		local i=0
		while [ ! -f "/etc/expand-overlay.done" ] && [ $i -lt 30 ]; do
			sleep 1
			i=$((i + 1))
		done

		if [ -f "/etc/expand-overlay.done" ]; then
			resize2fs /dev/mmcblk2p3 2>/dev/null
			touch "$flag"
		fi
	fi

	# ---- Stage 2b: Format and mount p4 data partition ----
	if [ ! -f "$p4flag" ]; then
		if dd if=/dev/mmcblk2p4 bs=5 count=1 2>/dev/null | grep -qF "RESET"; then
			mkfs.ext4 -F -L data /dev/mmcblk2p4 2>/dev/null
		fi

		mkdir -p /mnt/data
		mount /dev/mmcblk2p4 /mnt/data 2>/dev/null

		mkdir -p /mnt/data/docker

		uci -q set dockerd.globals.data_root="/mnt/data/docker"
		uci -q commit dockerd

		if ! grep -q "mmcblk2p4" /etc/config/fstab 2>/dev/null; then
			block detect > /dev/null 2>&1
			local idx=$(( $(uci show fstab | grep -c "fstab.@mount") - 1 ))
			[ "$idx" -ge 0 ] && uci -q set fstab.@mount[$idx].target="/mnt/data"
			uci -q commit fstab
		fi

		touch "$p4flag"
	fi

	return 0
}