#!/bin/sh -e


install_files() {
	local target_dir="$1"
	local source_dir="$(readlink -f "${2:-.}")"
	local target_filename_prefix="${3}"

	mkdir -vp "${target_dir}"
	target_dir="$(readlink -f "${target_dir}")"

	if [ ! -d "${source_dir}" ]; then
		echo "Source directory ${source_dir} does not exist, skipping."
		return
	fi
	(
		cd "${source_dir}"
		for f in "${source_dir}"/*; do
			case "$(basename "$f")" in
			dotfiles)
				install_files "${target_dir}" "$f" .
				;;
			*.jq)
				tmpfile="$(mktemp)"
				if [ -f "$f" ]; then
					tmpfile="$(mktemp)"
					target_file="${target_dir}/$(basename "$f" .jq)"
					if [ -f "$target_file" ]; then
						cat "$target_file"
					else
						echo "{}"
					fi | jq "$(cat "$f")" > "$tmpfile"
					mv -v "$tmpfile" "$target_file"
				else
					echo "Expected source file with .jq extension not to be a directory."
					exit 1
				fi
				;;
			*)
				if [ -d "$f" ]; then
					install_files "${target_dir}/${target_filename_prefix}$(basename "$f")" "$f"
				else
					cp -v "$f" "${target_dir}/${target_filename_prefix}$(basename "$f")"
				fi
				;;
			esac
		done
	)
}

###

install_files "${HOME}" home
install_files "/etc" etc