name: iverilog setup
description: Cached build and install of iverilog

inputs:
  runs-on:
    required: true
    type: string

runs:
  using: composite
  steps:
    - name: iverilog Linux deps
      if: steps.restore-iverilog.outputs.cache-hit != 'true' && runner.os == 'Linux'
      uses: awalsh128/cache-apt-pkgs-action@v1.6.0
      with:
        packages: autoconf gperf make gcc g++ bison flex libbz2-dev
        version: ${{ inputs.runs-on }}-iverilog

    - name: iverilog macOS deps
      if: steps.restore-iverilog.outputs.cache-hit != 'true' && runner.os == 'macOS'
      shell: bash
      run: |
        brew install autoconf

    - name: Get iverilog
      id: get-iverilog
      shell: bash
      run: |
        git clone https://github.com/steveicarus/iverilog.git
        cd iverilog
        echo "IVERILOG_GIT=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT

    - name: Get vcd2fst
      shell: bash
      run: |
        git clone https://github.com/mmicko/libwave.git
        mkdir -p ${{ github.workspace }}/.local/
        cd libwave
        cmake . -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/.local
        make -j$procs
        make install

    - uses: actions/cache/restore@v4
      id: restore-iverilog
      with:
        path: .local/
        key: ${{ inputs.runs-on }}-${{ steps.get-iverilog.outputs.IVERILOG_GIT }}

    - name: Build iverilog
      if: steps.restore-iverilog.outputs.cache-hit != 'true'
      shell: bash
      run: |
        mkdir -p ${{ github.workspace }}/.local/
        cd iverilog
        autoconf
        CC=gcc CXX=g++ ./configure --prefix=${{ github.workspace }}/.local
        make -j$procs
        make install

    - name: Check iverilog
      shell: bash
      run: |
        iverilog -V

    - uses: actions/cache/save@v4
      id: save-iverilog
      if: steps.restore-iverilog.outputs.cache-hit != 'true'
      with:
        path: .local/
        key: ${{ steps.restore-iverilog.outputs.cache-primary-key }}