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:
      # TODO: remove when https://github.com/axic/keccakjs/issues/13 got fixed
      - uses: actions/setup-node@v3
        with:
          node-version: 16

      - name: Remove unused software to free up space
        # macOS runners apparently have > 70 GB free so it's only needed on Ubuntu
        if: "env.PLATFORM != 'macosx-amd64'"
        run: |
          # These are quick to delete and large enough to make a difference
          rm -rf /usr/share/swift/                         # 1.3 GB in 80 subdirs
          rm -rf /usr/local/lib/android/sdk/build-tools/   # 2.1 GB in 450 subdirs
          rm -rf /usr/share/dotnet/shared/                 # 5.3 GB in 350 subdirs
          rm -rf /usr/local/lib/android/sdk/ndk/           # 7.6 GB in 1500 subdirs

      - uses: actions/setup-python@v3
        with:
          # Use the latest minor release of Python 3. prepare_report.py requires Python >= 3.7
          python-version: '3.x'

      - uses: actions/checkout@v3
        with:
          repository: 'ethereum/solidity'
          path: 'solidity/'
          # bytecode_reports_for_modified_binaries.sh requires access to a working copy with full history
          fetch-depth: 0

      - uses: actions/checkout@v3
        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@v3
        with:
          name: ${{ matrix.platform }}
          path: reports/*

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

    steps:
      - uses: actions/checkout@v3
        with:
          repository: 'ethereum/solidity'
          path: 'solidity/'

      - name: Download all artifacts
        uses: actions/download-artifact@v3
        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