t-bytecode-compare.yml

name: Release bytecode

on: pull_request

jobs:
   generate:
    runs-on: ${{ matrix.os }}

    strategy:
      matrix:
        include:
          - platform: emscripten-wasm32
            os: ubuntu-latest

          - platform: emscripten-asmjs
            os: ubuntu-latest

          - platform: linux-amd64
            os: ubuntu-latest

          - platform: macosx-amd64
            os: macos-latest

          # TODO: Run checks on Windows binaries too

    env:
      PLATFORM: ${{ matrix.platform }}

    steps:
      - uses: actions/setup-node@v4

      - name: Symlink solc-bin to /mnt/solc-bin
        # It's now too big to fit on the main partition on Ubuntu. macOS runners are fine since
        # they apparently have >70 GB available, but on Ubuntu it's mostly filled with software.
        # NOTE: We don't clone to /mnt/solc-bin directly because the checkout action does not support that.
        # See https://github.com/actions/checkout/issues/197
        if: "env.PLATFORM != 'macosx-amd64'"
        run: |
          sudo mkdir /mnt/solc-bin/
          sudo chown "$USER" /mnt/solc-bin/
          ln -s /mnt/solc-bin/ solc-bin

      - uses: actions/setup-python@v5
        with:
          # Use the latest minor release of Python 3. prepare_report.py requires Python >= 3.7
          python-version: '3.x'

      - uses: actions/checkout@v4
        with:
          repository: 'ethereum/solidity'
          path: 'solidity/'
          # bytecode_reports_for_modified_binaries.sh requires access to a working copy with full history
          fetch-depth: 0
          submodules: 'recursive'

      - uses: actions/checkout@v4
        with:
          ref: ${{ env.GITHUB_REF }}
          path: 'solc-bin/'
          # We need more than just a single revision to be able to use diff
          fetch-depth: 0

      - name: Generate reports from matching release binaries
        run: |
          base_dir="$PWD"

          mkdir reports/
          cd reports/

          "${base_dir}/solidity/scripts/solc-bin/bytecode_reports_for_modified_binaries.sh" \
            "$PLATFORM" \
            "origin/${{ github.base_ref }}" \
            "origin/${GITHUB_HEAD_REF}" \
            "$base_dir/solc-bin" \
            "$base_dir/solidity"

      - name: Upload reports
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.platform }}
          path: reports/*

   compare:
    runs-on: ubuntu-latest
    needs: generate

    steps:
      - uses: actions/checkout@v4
        with:
          repository: 'ethereum/solidity'
          path: 'solidity/'

      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: reports/

      - name: Compare
        run: |
          # This can happen if the PR does not touch any release binaries.
          [[ -d reports/ ]] || { echo "No reports found."; exit 0; }

          cd reports/
          ../solidity/scripts/solc-bin/compare_bytecode_reports.sh