#!/bin/sh
IMAGE_NAME="${IMAGE_NAME:=alpine-vm}"
IMAGE_SIZE="${IMAGE_SIZE:-512M}"
IMAGE_FORMAT="${IMAGE_FORMAT:=raw}"
ALPINE_BRANCH="${ALPINE_BRANCH:=latest-stable}"
KERNEL_FLAVOR="${KERNEL_FLAVOR:=virt}"
IMAGE_FILE="vm.${IMAGE_FORMAT}"
SCRIPT_DIR="$PWD"
OVERLAY_DIR="${SCRIPT_DIR}/overlay"
CONFIGURE_SH="${SCRIPT_DIR}/configure.sh"

TMP=$(mktemp)

modprobe nbd max_parts=8  && [ -e /dev/nbd0 ] || mknod /dev/nbd0 b 43 0

cleanup() {
	 rm -f "$TMP" "${TMP}.rc"
}

trap cleanup INT TERM EXIT

# We use BIOS here to skip creating partitions

RC_FILE="${TMP}.rc"

# Capture the real exit status of alpine-make-vm-image (the `| tee` pipeline
# would otherwise mask it behind tee's status; busybox ash has no PIPESTATUS).
{ alpine-make-vm-image \
	--boot-mode "BIOS" \
    --branch "$ALPINE_BRANCH" \
	--image-format   "$IMAGE_FORMAT" \
	--image-size     "$IMAGE_SIZE" \
	--kernel-flavor  "$KERNEL_FLAVOR" \
	--serial-console \
	--fs-skel-dir    "$OVERLAY_DIR" \
	--fs-skel-chown  root:root \
	--script-chroot \
	--packages       "nftables curl docker openssh" \
	"$IMAGE_FILE" \
	"$CONFIGURE_SH"; echo $? > "$RC_FILE"; } 2>&1 | tee "$TMP"

rc=$(cat "$RC_FILE" 2>/dev/null || echo 1)

if [ "$rc" -ne 0 ]; then
    echo "BUILD FAILED (alpine-make-vm-image exited $rc)"
    exit 1
fi