cleanups

Software/MainBoard/bootloader/build_bootloader.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Build script for custom ESP-IDF bootloader with rollback enabled.
+# Requirements:
+#   - ESP-IDF installed
+#   - IDF_PATH exported
+#   - Python env prepared (the usual ESP-IDF setup)
+# Usage:
+#   ./build_bootloader.sh [esp32|esp32s3|esp32c3|esp32s2|esp32c2|esp32c6|esp32h2]
+#   If target is omitted, the last configured target will be used.
+
+TARGET=${1:-}
+
+if [[ -z "${IDF_PATH:-}" ]]; then
+  echo "ERROR: IDF_PATH is not set. Please install ESP-IDF and export the environment (source export.sh)." >&2
+  exit 1
+fi
+
+# shellcheck source=/dev/null
+source "$IDF_PATH/export.sh"
+
+if [[ -n "$TARGET" ]]; then
+  idf.py set-target "$TARGET"
+fi
+
+# Ensure sdkconfig.defaults is considered (ESP-IDF does this automatically).
+# Build only the bootloader.
+idf.py bootloader
+
+echo
+BOOTLOADER_BIN="build/bootloader/bootloader.bin"
+if [[ -f "$BOOTLOADER_BIN" ]]; then
+  echo "Bootloader built: $BOOTLOADER_BIN"
+  echo "You can use this with espflash via:"
+  echo "  espflash flash --bootloader $BOOTLOADER_BIN [--partition-table partitions.csv] <your-app-binary>"
+else
+  echo "ERROR: Bootloader binary not found. Check build logs above." >&2
+  exit 2
+fi
+cp build/bootloader/bootloader.bin ../rust/bootloader.bin