Merge website and CMake to Meson transition

Building a website to structure and deploy the artifacts was planned and
requires a well set-up build system to handle all the file paths targets
and dependencies.

Since multiple CMake Zephyr builds are required for the application
firmware, bootloader firmware and the native_sim application firmware
simulation CMake external project was used.

Since this generates a build tree with a confusing structure Meson was
evaluated.

Finally the Meson build system was a good fit as top-level build system
and allows external projects as an experimental feature if they can
configure a Make-based build system which is given for Zephyr.

10 files changed, 122 insertions, 97 deletions

diff --git a/fw/CMakeLists.txt b/fw/CMakeLists.txt
deleted file mode 100644
index 2affe92..0000000
--- a/fw/CMakeLists.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public License,
-# v. 2.0. If a copy of the MPL was not distributed with this file, You can
-# obtain one at https://mozilla.org/MPL/2.0/.
-
-cmake_minimum_required(VERSION 3.20.0)
-
-include(ExternalProject)
-
-set(KEY_DEFAULT "$ENV{HOME}/mcuboot/key.pem")
-set(KEY ${KEY_DEFAULT} CACHE STRING "Firmware signing key path")
-message(STATUS "Firmware signing key path: ${KEY}")
-
-set(BOARD_DEFAULT "native_sim/native/64")
-set(BOARD ${BOARD_DEFAULT} CACHE STRING "Zephyr board identifier")
-message(STATUS "Selected board: ${BOARD}")
-
-add_subdirectory(rtos)
-string(REPLACE ";" "," ZEPHYR_MODULES_COMMA "${ZEPHYR_MODULES}")
-
-if(BOARD STREQUAL "nucleo_f767zi")
-	ExternalProject_Add(
-		btl
-		PREFIX btl
-		SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/rtos/modules/mcuboot/boot/zephyr"
-		BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/btl"
-		INSTALL_COMMAND ""
-		LIST_SEPARATOR ","
-		CMAKE_ARGS
-			"-DBOARD=${BOARD}"
-			"-DZEPHYR_BASE=${ZEPHYR_BASE}"
-			"-DZEPHYR_MODULES=${ZEPHYR_MODULES_COMMA}"
-			"-DEXTRA_CONF_FILE=${CMAKE_CURRENT_SOURCE_DIR}/btl/bootloader.conf"
-			-DCONFIG_BOOT_SIGNATURE_KEY_FILE="${KEY}"
-	)
-endif()
-
-add_subdirectory(app)
diff --git a/fw/README.md b/fw/README.md
deleted file mode 100644
index 9883b2d..0000000
--- a/fw/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# iot-contact Firmware
-
-This is the firmware for iot-contact. It is based on the Zephyr real time
-operating system [1].
-
-[1]: https://zephyrproject.org
diff --git a/fw/app/meson.build b/fw/app/meson.build
new file mode 100644
index 0000000..97c17f1
--- /dev/null
+++ b/fw/app/meson.build
@@ -0,0 +1,45 @@
+external_project = import('unstable-external_project')
+
+application_source = meson.current_source_dir()
+
+external_project.add_project(
+  configure_zephyr,
+  configure_options: [
+    '--source-tree', application_source,
+    '--build-tree', meson.current_build_dir() / 'build',
+    '--board', board,
+    '--zephyr-base', zephyr,
+    '--zephyr-modules', ';'.join(zephyr_modules),
+  ],
+  verbose: true,
+)
+
+application = custom_target(
+  'application',
+  output: ['application.bin'],
+  command: [
+    build_zephyr,
+    '--build-tree', meson.current_build_dir() / 'build',
+    '--binary-name', 'zephyr.bin',
+    '--target-name', 'application.bin',
+  ],
+)
+
+application_signed = custom_target(
+  'application_signed',
+  output: ['application.signed.bin'],
+  command: [
+    imgtool,
+    'sign',
+    '--version', '0.0.0',
+    '--header-size', '0x200',
+    '--slot-size', '0xc0000',
+    '--key', signing_key,
+    meson.current_build_dir() / 'application.bin',
+    meson.current_build_dir() / 'application.signed.bin',
+  ],
+  build_by_default: true,
+  depends: application,
+  install: true,
+  install_dir: 'website/static',
+)
diff --git a/fw/btl/meson.build b/fw/btl/meson.build
new file mode 100644
index 0000000..4d80a58
--- /dev/null
+++ b/fw/btl/meson.build
@@ -0,0 +1,28 @@
+external_project = import('unstable-external_project')
+
+external_project.add_project(
+  configure_zephyr,
+  configure_options: [
+    '--source-tree', bootloader_firmware,
+    '--build-tree', meson.current_build_dir() / 'build',
+    '--board', board,
+    '--zephyr-base', zephyr,
+    '--zephyr-modules', ';'.join(zephyr_modules),
+    '--extra-config', meson.current_source_dir() / 'bootloader.conf',
+    '--signing-key', signing_key,
+  ],
+  verbose: true,
+)
+
+bootloader = custom_target('bootloader',
+  output: ['bootloader.bin'],
+  command: [
+    build_zephyr,
+    '--build-tree', meson.current_build_dir() / 'build',
+    '--binary-name', 'zephyr.bin',
+    '--target-name', 'bootloader.bin',
+  ],
+  build_by_default: true,
+  install: true,
+  install_dir: 'website/static',
+)
diff --git a/fw/meson.build b/fw/meson.build
new file mode 100644
index 0000000..8194827
--- /dev/null
+++ b/fw/meson.build
@@ -0,0 +1,9 @@
+board = 'nucleo_f767zi'
+
+fs = import('fs')
+signing_key = fs.expanduser('~') / 'mcuboot' / 'key.pem'
+
+subdir('rtos')
+subdir('app')
+subdir('btl')
+subdir('sim')
diff --git a/fw/nucleo.sh b/fw/nucleo.sh
deleted file mode 100755
index ad0467b..0000000
--- a/fw/nucleo.sh
+++ /dev/null
@@ -1,38 +0,0 @@
-#!/bin/sh
-
-
-# This Source Code Form is subject to the terms of the Mozilla Public License,
-# v. 2.0. If a copy of the MPL was not distributed with this file, You can
-# obtain one at https://mozilla.org/MPL/2.0/.
-
-
-set -euf
-
-
-SCRIPT="$(realpath "$0")"
-FW="$(dirname "$SCRIPT")"
-ROOT="$(dirname "$FW")"
-BUILD="${ROOT}/build"
-BOOTLOADER_FIRMWARE="${BUILD}/fw/btl/zephyr/zephyr.bin"
-APPLICATION_FIRMWARE="${BUILD}/fw/app/zephyr/zephyr.bin"
-APPLICATION_FIRMWARE_SIGNED="${BUILD}/fw/app/zephyr/zephyr.signed.bin"
-BOOTLOADER_FLASH_ADDRESS='0x8000000'
-APPLICATION_FLASH_ADDRESS='0x8040000'
-IMGTOOL="${ROOT}/imgtool.py"
-KEY="${HOME}/mcuboot/key.pem"
-BOARD='nucleo_f767zi'
-
-
-set -x
-
-python "$IMGTOOL" sign \
-	--version 0.0.0 \
-	--header-size 0x200 \
-	--slot-size 0xc0000 \
-	--key "$KEY" \
-	"$APPLICATION_FIRMWARE" \
-	"$APPLICATION_FIRMWARE_SIGNED"
-st-flash --connect-under-reset write "$BOOTLOADER_FIRMWARE" \
-	"$BOOTLOADER_FLASH_ADDRESS"
-st-flash --connect-under-reset write "$APPLICATION_FIRMWARE_SIGNED" \
-	"$APPLICATION_FLASH_ADDRESS"
diff --git a/fw/rtos/CMakeLists.txt b/fw/rtos/CMakeLists.txt
deleted file mode 100644
index d9f116c..0000000
--- a/fw/rtos/CMakeLists.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public License,
-# v. 2.0. If a copy of the MPL was not distributed with this file, You can
-# obtain one at https://mozilla.org/MPL/2.0/.
-
-set(ZEPHYR_MODULES
-	"${CMAKE_CURRENT_SOURCE_DIR}/modules/cmsis"
-	"${CMAKE_CURRENT_SOURCE_DIR}/modules/hal_stm32"
-	"${CMAKE_CURRENT_SOURCE_DIR}/modules/mbedtls"
-	"${CMAKE_CURRENT_SOURCE_DIR}/modules/mcuboot"
-	PARENT_SCOPE
-)
-
-set(ZEPHYR_BASE
-	"${CMAKE_CURRENT_SOURCE_DIR}/zephyr"
-	PARENT_SCOPE
-)
diff --git a/fw/rtos/meson.build b/fw/rtos/meson.build
new file mode 100644
index 0000000..800153d
--- /dev/null
+++ b/fw/rtos/meson.build
@@ -0,0 +1,3 @@
+subdir('modules')
+
+zephyr = meson.current_source_dir() / 'zephyr'
diff --git a/fw/rtos/modules/meson.build b/fw/rtos/modules/meson.build
new file mode 100644
index 0000000..14b14f5
--- /dev/null
+++ b/fw/rtos/modules/meson.build
@@ -0,0 +1,10 @@
+zephyr_modules = [
+  meson.current_source_dir() / 'cmsis',
+  meson.current_source_dir() / 'hal_stm32',
+  meson.current_source_dir() / 'mbedtls',
+  meson.current_source_dir() / 'mcuboot',
+]
+
+mcuboot = meson.current_source_dir() / 'mcuboot'
+bootloader_firmware = mcuboot / 'boot' / 'zephyr'
+imgtool = mcuboot / 'scripts' / 'imgtool.py'
diff --git a/fw/sim/meson.build b/fw/sim/meson.build
new file mode 100644
index 0000000..a4dcb8a
--- /dev/null
+++ b/fw/sim/meson.build
@@ -0,0 +1,27 @@
+external_project = import('unstable-external_project')
+
+external_project.add_project(
+  configure_zephyr,
+  configure_options: [
+    '--source-tree', application_source,
+    '--build-tree', meson.current_build_dir() / 'build',
+    '--board', 'native_sim/native/64',
+    '--zephyr-base', zephyr,
+    '--zephyr-modules', ';'.join(zephyr_modules),
+  ],
+  verbose: true,
+)
+
+simulation = custom_target(
+  'simulation',
+  output: ['simulation-linux-amd64.exe'],
+  command: [
+    build_zephyr,
+    '--build-tree', meson.current_build_dir() / 'build',
+    '--binary-name', 'zephyr.exe',
+    '--target-name', 'simulation-linux-amd64.exe',
+  ],
+  build_by_default: true,
+  install: true,
+  install_dir: 'website/static',
+)