Add macOS build scripts

scripts/build_macos.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+IDF_VERSION="${IDF_VERSION:-v5.5.2}"
+ESP_ROOT="${ESP_ROOT:-$HOME/.espressif}"
+DEFAULT_IDF_DIR="$ESP_ROOT/esp-idf-$IDF_VERSION"
+IDF_DIR="${IDF_DIR:-${IDF_PATH:-$DEFAULT_IDF_DIR}}"
+
+if [[ ! -f "$IDF_DIR/export.sh" ]]; then
+  echo "ESP-IDF not found at: $IDF_DIR" >&2
+  echo "Run scripts/setup_idf_macos.sh first, or set IDF_DIR/IDF_PATH." >&2
+  exit 1
+fi
+
+# shellcheck source=/dev/null
+. "$IDF_DIR/export.sh"
+
+cd "$PROJECT_ROOT"
+idf.py set-target esp32s3
+idf.py build

scripts/setup_idf_macos.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ "${OSTYPE:-}" != "darwin"* ]]; then
+  echo "This setup script currently supports macOS only." >&2
+  exit 1
+fi
+
+IDF_VERSION="${IDF_VERSION:-v5.5.2}"
+ESP_ROOT="${ESP_ROOT:-$HOME/.espressif}"
+IDF_DIR="${IDF_DIR:-$ESP_ROOT/esp-idf-$IDF_VERSION}"
+
+if ! command -v brew >/dev/null 2>&1; then
+  echo "Homebrew not found. Install it first:" >&2
+  echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\"" >&2
+  exit 1
+fi
+
+brew install \
+  git wget flex bison gperf python cmake ninja ccache dfu-util libusb libffi openssl@3
+
+mkdir -p "$ESP_ROOT"
+if [[ ! -d "$IDF_DIR/.git" ]]; then
+  git clone --depth 1 --branch "$IDF_VERSION" --recursive \
+    https://github.com/espressif/esp-idf.git "$IDF_DIR"
+else
+  git -C "$IDF_DIR" fetch --tags --depth 1 origin "$IDF_VERSION"
+  git -C "$IDF_DIR" checkout "$IDF_VERSION"
+  git -C "$IDF_DIR" submodule update --init --recursive
+fi
+
+"$IDF_DIR/install.sh" esp32s3
+
+echo
+echo "ESP-IDF installed. For current shell run:"
+echo "  . \"$IDF_DIR/export.sh\""
+echo "Then run from project root:"
+echo "  idf.py set-target esp32s3"
+echo "  idf.py build"