gistfile1.txt

$ mkdir -p template-module/zephyr
$ touch template-module/zephyr/{CMakeLists.txt,Kconfig}
$ cat zephyr/samples/hello_world/CMakeLists.txt
# SPDX-License-Identifier: Apache-2.0

cmake_minimum_required(VERSION 3.13.1)

set(ZEPHYR_EXTRA_MODULES "/home/mbolivar/zp/template-module")

include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
project(hello_world)

target_sources(app PRIVATE src/main.c)

$ west build -b qemu_cortex_m3 -s zephyr/samples/hello_world/ >/dev/null
$ grep template build/zephyr_modules.txt
"template-module":"/home/mbolivar/zp/template-module/zephyr"