angie-conv-image/image-entry.d/72-merge-tree.sh

#!/bin/sh
set -ef

. /image-entry.d/00-common.envsh

[ -d "${merged_root}" ] || install -d "${merged_root}"

remap_path_int() {
	printf '%s' "$2/${1#*/}"
}

remap_path() {
	case "$1" in
	/etc/angie/* ) remap_path_int "${1#/etc/angie/}" "$2" ;;
	/angie/* )     remap_path_int "${1#/angie/}" "$2" ;;
	## misbehavior!
	* )
		log_always "remap_path() doesn't know how to handle this path: '$1'"
		return 1
	;;
	esac
}

for n in ${NGX_DIRS_MERGE} ; do
	[ -n "$n" ] || continue

	merged_dir="${merged_root}/$n"
	while read -r old_path ; do
		[ -n "${old_path}" ] || continue

		new_path=$(remap_path "${old_path}" "${merged_dir}")
		[ -n "${new_path}" ]

		new_dir="${new_path%/*}"
		[ -d "${new_dir}" ] || mkdir -p "${new_dir}"

		ln_s "${old_path}" "${new_path}"
	done <<-EOF
	$(overlay-dir-list.sh "/etc/angie/$n.dist" "/etc/angie/$n" "/angie/$n")
	EOF
done

exit 0