image

#!/usr/bin/env bash

set -eufo pipefail

IFS=',' read -r -a features <<< "$BUILDER_FEATURES"

fstab="$(mktemp)"

for feature in "${features[@]}"; do
	file="/builder/features/$feature/fstab"
	if [ -e "$file" ]; then
		[ ! -s "$fstab" ] || echo "warning: multiple fstabs, overwriting (consider using fstab.mod instead)"
		printf 'using base fstab: %s\n' "$file"
		sed 's/#.*$//;/^[[:space:]]*$/d' "$file" > "$fstab"
	fi
done

fstab_tmp="$(mktemp)"
for feature in "${features[@]}"; do
	file="/builder/features/$feature/fstab.mod"
	if [ -e "$file" ]; then
		printf 'modifying fstab with %s\n' "$file"
		"$file" < "$fstab" > "$fstab_tmp"
		sed 's/#.*$//;/^[[:space:]]*$/d' "$fstab_tmp" > "$fstab"
	fi
done
rm "$fstab_tmp"

echo "---- fstab ----"
cat "$fstab"
echo "---------------"


mkdir /rootfs
mount -t tmpfs tmpfs /rootfs
tar --extract --xattrs --xattrs-include '*' --directory /rootfs < /input

(export PATH="/builder/image.d:$PATH"; makepart /rootfs < "$fstab" | makedisk /rootfs /image)

cp --sparse always /image /output