From 82fa02bcac5e278586cb2e3c9cc597699f6f640d Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Sat, 5 Apr 2025 11:10:12 +0200
Subject: fw: btl: Configure bootloader build with Meson

CMake ExternalProject creates a pretty confusing build tree. Since the
rest of the project anyway starts moving to Meson the bootloader is
configured via Meson as a first step.
---
 fw/btl/configure.sh         | 14 ++++++++++++++
 fw/btl/meson.build          | 16 ++++++++++++++++
 fw/meson.build              |  7 +++++++
 fw/rtos/meson.build         |  3 +++
 fw/rtos/modules/meson.build |  8 ++++++++
 meson.build                 |  1 +
 6 files changed, 49 insertions(+)
 create mode 100755 fw/btl/configure.sh
 create mode 100644 fw/btl/meson.build
 create mode 100644 fw/meson.build
 create mode 100644 fw/rtos/meson.build
 create mode 100644 fw/rtos/modules/meson.build

diff --git a/fw/btl/configure.sh b/fw/btl/configure.sh
new file mode 100755
index 0000000..87df3d2
--- /dev/null
+++ b/fw/btl/configure.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+
+set -eufx
+
+
+cmake \
+	"-S$1" \
+	"-B$2" \
+	"-DBOARD=$3" \
+	"-DZEPHYR_BASE=$4" \
+	"-DZEPHYR_MODULES=${5}" \
+	"-DEXTRA_CONF_FILE=${6}" \
+	"-DCONFIG_BOOT_SIGNATURE_KEY_FILE=\"${7}\""
diff --git a/fw/btl/meson.build b/fw/btl/meson.build
new file mode 100644
index 0000000..fd6562e
--- /dev/null
+++ b/fw/btl/meson.build
@@ -0,0 +1,16 @@
+bootloader_config = meson.current_source_dir() / 'bootloader.conf'
+
+external_project = import('unstable-external_project')
+bootloader_bin = meson.current_build_dir() / 'zephyr' / 'zephyr.bin'
+bootloader_project = external_project.add_project('configure.sh',
+  configure_options: [
+    bootloader_firmware,
+    meson.current_build_dir(),
+    board,
+    zephyr,
+    ';'.join(zephyr_modules),
+    bootloader_config,
+    signing_key,
+  ],
+  verbose: true,
+)
diff --git a/fw/meson.build b/fw/meson.build
new file mode 100644
index 0000000..7f9bead
--- /dev/null
+++ b/fw/meson.build
@@ -0,0 +1,7 @@
+board = 'nucleo_f767zi'
+
+fs = import('fs')
+signing_key = fs.expanduser('~') / 'mcuboot' / 'key.pem'
+
+subdir('rtos')
+subdir('btl')
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..52f50c2
--- /dev/null
+++ b/fw/rtos/modules/meson.build
@@ -0,0 +1,8 @@
+zephyr_modules = [
+  meson.current_source_dir() / 'cmsis',
+  meson.current_source_dir() / 'hal_stm32',
+  meson.current_source_dir() / 'mbedtls',
+  meson.current_source_dir() / 'mcuboot',
+]
+
+bootloader_firmware = meson.current_source_dir() / 'mcuboot' / 'boot' / 'zephyr'
diff --git a/meson.build b/meson.build
index 73206f4..9205388 100644
--- a/meson.build
+++ b/meson.build
@@ -8,5 +8,6 @@ css = fs.copyfile(
   install_dir: 'website/static',
 )
 
+subdir('fw')
 subdir('pcb')
 subdir('web')
-- 
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