#!/bin/bash

if [ -z $BANAN_DISK_IMAGE_PATH ]; then
	echo  "You must set the BANAN_DISK_IMAGE_PATH environment variable" >&2
	exit 1
fi

if [ -z $BANAN_SYSROOT ]; then
	echo  "You must set the BANAN_SYSROOT environment variable" >&2
	exit 1
fi

if [ -z $BANAN_FAKEROOT ]; then
	echo  "You must set the BANAN_FAKEROOT environment variable" >&2
	exit 1
fi

if [ -z $BANAN_BUILD_DIR ]; then
	echo  "You must set the BANAN_BUILD_DIR environment variable" >&2
	exit 1
fi

if [ "$1" == "full" ] || [ ! -f "$BANAN_DISK_IMAGE_PATH" ]; then
	"$BANAN_SCRIPT_DIR/image-create.sh" || exit 1
fi

set -u

MOUNT_DIR="$BANAN_BUILD_DIR/mount"
mkdir -p "$MOUNT_DIR"

LOOP_DEV="$(sudo losetup --show -Pf "$BANAN_DISK_IMAGE_PATH" || exit 1)"
ROOT_PARTITION="${LOOP_DEV}p2"
if [ ! -b "$ROOT_PARTITION" ]; then
	echo "Failed to probe partitions for banan disk image." >&2
	sudo losetup -d "$LOOP_DEV"
	exit 1
fi

if sudo mount "$ROOT_PARTITION" "$MOUNT_DIR"; then
	if (($BANAN_INITRD)); then
		fakeroot -i "$BANAN_FAKEROOT" tar -C "$BANAN_SYSROOT" -cf "$BANAN_SYSROOT.initrd" .

		sudo mkdir -p "$MOUNT_DIR/boot"
		sudo cp "$BANAN_BUILD_DIR/kernel/banan-os.kernel" "$MOUNT_DIR/boot/banan-os.kernel"
		sudo mv "$BANAN_SYSROOT.initrd" "$MOUNT_DIR/boot/banan-os.initrd"
	else
		sudo rsync -rulHpt "$BANAN_SYSROOT/" "$MOUNT_DIR"

		fakeroot -i "$BANAN_FAKEROOT" find "$BANAN_SYSROOT" -printf '%P|%U|%G|%04m\n' >"$BANAN_BUILD_DIR/sysroot-perms.txt"
		sudo "$BANAN_TOOLS_DIR/update-image-perms" "$MOUNT_DIR" "$BANAN_BUILD_DIR/sysroot-perms.txt"
	fi

	sudo umount "$MOUNT_DIR"
fi

sudo losetup -d "$LOOP_DEV"