name: Check code size

on:
  pull_request:
    paths:
      - '.github/workflows/*.yml'
      - 'tools/**'
      - 'py/**'
      - 'extmod/**'
      - 'shared/**'
      - 'lib/**'
      - 'ports/bare-arm/**'
      - 'ports/esp32/**'
      - 'ports/mimxrt/**'
      - 'ports/minimal/**'
      - 'ports/rp2/**'
      - 'ports/samd/**'
      - 'ports/stm32/**'
      - 'ports/unix/**'

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

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v6
      with:
        fetch-depth: 100
    - name: Install packages
      run: tools/ci.sh code_size_setup

    # Needs to be kept in synch with ports_esp32.yml
    - id: idf_ver
      name: Read the ESP-IDF version (including Python version) and set outputs.IDF_VER
      run: tools/ci.sh esp32_idf_ver | tee "${GITHUB_OUTPUT}"
    - name: Cached ESP-IDF install
      id: cache_esp_idf
      uses: actions/cache@v4
      with:
        path: |
          ./esp-idf/
          ~/.espressif/
          !~/.espressif/dist/
          ~/.cache/pip/
        key: esp-idf-${{ steps.idf_ver.outputs.IDF_VER }}
    - name: Install ESP-IDF packages
      if: steps.cache_esp_idf.outputs.cache-hit != 'true'
      run: tools/ci.sh esp32_idf_setup

    - name: ccache
      uses: hendrikmuhs/ccache-action@v1.2
      with:
        key: code_size

    - name: Build
      run: tools/ci.sh code_size_build
    - name: Compute code size difference
      run: source tools/ci.sh && ci_code_size_report
    - name: Save PR number
      if: github.event_name == 'pull_request'
      env:
        PR_NUMBER: ${{ github.event.number }}
      run: echo $PR_NUMBER > pr_number
    - name: Upload diff
      if: github.event_name == 'pull_request'
      uses: actions/upload-artifact@v6
      with:
        name: code-size-report
        path: |
          diff
          pr_number
        retention-days: 1