ESP32.yml

name: Build MicroPython for ESP32 Boards

on:
  push:
    branches:
      - CI

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  setup-environment:
    runs-on: ubuntu-24.04
    steps:
      # Cache ESP-IDF dependencies and MicroPython
      - name: Cache ESP-IDF and MicroPython
        id: cache_esp_idf
        uses: actions/cache@v4
        with:
          path: |
            ~/esp-idf/
            ~/.espressif/
            !~/.espressif/dist/
            ~/.cache/pip/
            ./micropython/
          key: esp-idf-${{ hashFiles('path-to-lock-file-or-important-files') }}
          restore-keys: |
            esp-idf-

      # 3. Install ESP-IDF dependencies (if not cached)
      - name: Install ESP-IDF dependencies
        if: steps.cache_esp_idf.outputs.cache-hit != 'true'
        run: |
          sudo apt-get update
          sudo apt-get install -y git wget flex bison gperf python3 python3-pip python3-venv cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0

      # 4. Download and set up ESP-IDF 5.2.x (if not cached)
      - name: Set up ESP-IDF 5.2.x
        id: export-idf
        if: steps.cache_esp_idf.outputs.cache-hit != 'true'
        run: |
          if [ ! -d "esp-idf" ]; then
            cd ~
            git clone --branch release/v5.2 --recursive https://github.com/espressif/esp-idf.git
            cd esp-idf
            ./install.sh all
          else
            echo "ESP-IDF found in cache."
          fi

      # 5. Clone the latest MicroPython release (if not cached)
      - name: Clone MicroPython latest release
        id: clone-micropython
        if: steps.cache_esp_idf.outputs.cache-hit != 'true'
        run: |
          if [ ! -d "micropython" ]; then
            LATEST_RELEASE=$(curl --silent "https://api.github.com/repos/micropython/micropython/releases/latest" | jq -r .tag_name)
            echo "Cloning MicroPython release: $LATEST_RELEASE"
            git clone --depth 1 --branch $LATEST_RELEASE https://github.com/micropython/micropython.git
            cd micropython
            git submodule update --init --depth 1
            echo "::set-output name=micropython-path::$(pwd)"
            cd mpy-cross
            make
            echo "Mpy-Cross compiler built successfully"
          else
            echo "MicroPython found in cache."
            echo "::set-output name=micropython-path::$(pwd)/micropython"
          fi

      - name: test ESP-IDF environment
        run: |
          cd ~/esp-idf/
          source ./export.sh
  # Dynamically create jobs for each board
  build:
    needs: setup-environment
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        board: 
          - ESP32_GENERIC:SPIRAM
          - ESP32_GENERIC_S2:SPIRAM
          - ESP32_GENERIC_S3:SPIRAM
    steps:
      # Cache ESP-IDF dependencies and MicroPython
      - name: Cache ESP-IDF and MicroPython
        uses: actions/cache@v4
        with:
          path: |
            ~/esp-idf/
            ~/.espressif/
            !~/.espressif/dist/
            ~/.cache/pip/
            ./micropython/
          key: esp-idf-${{ hashFiles('path-to-lock-file-or-important-files') }}
          restore-keys: |
            esp-idf-

      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install ESP-IDF dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y git wget flex bison gperf python3 python3-pip python3-venv cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0

      # 1. Set up ESP-IDF environment for the job
      - name: Set up ESP-IDF environment
        run: |
          cd ~/esp-idf/
          source ./export.sh
          cd -

      # 2. Parse Board Name and Variant
      - name: Parse Board Name and Variant
        id: parse
        run: |
          IFS=':' read -r BOARD_NAME BOARD_VARIANT <<< "${{ matrix.board }}"
          echo "::set-output name=board_name::${BOARD_NAME}"
          echo "::set-output name=board_variant::${BOARD_VARIANT}"

      # 3. Build MicroPython for each board
      - name: Build MicroPython
        run: |
          cd ${{ needs.setup-environment.outputs.micropython-path }}/ports/esp32
          make submodules

          # Apply sdkconfig if available
          if [ -f "../../../src/sdkconfig_${{ steps.parse.outputs.board_name }}" ]; then
            cp ../../../src/sdkconfig_${{ steps.parse.outputs.board_name }} sdkconfig.defaults
          fi