# DESCRIPTION: Github actions config
# This name is key to badges in README.rst, so we use the name build
# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

name: build

on:
  push:
  pull_request:
  workflow_dispatch:
  schedule:
  - cron: '0 0 * * 0' # weekly

env:
  CI_OS_NAME: linux
  CI_COMMIT: ${{ github.sha }}
  CCACHE_COMPRESS: 1
  CCACHE_DIR: ${{ github.workspace }}/.ccache
  CCACHE_LIMIT_MULTIPLE: 0.95

defaults:
  run:
    shell: bash
    working-directory: repo

jobs:

  build:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-22.04, ubuntu-20.04]
        compiler:
          - { cc: clang, cxx: clang++ }
          - { cc: gcc,   cxx: g++     }
        m32: [0, 1]
        exclude:
          # Build pull requests only with ubuntu-22.04 and without m32
          - os:  ${{ github.event_name == 'pull_request' && 'ubuntu-18.04' || 'do-not-exclude' }}
          - os:  ${{ github.event_name == 'pull_request' && 'ubuntu-20.04' || 'do-not-exclude' }}
          - m32: ${{ github.event_name == 'pull_request' && 1              || 'do-not-exclude' }}
          # Build -m32 only on ubuntu-22.04
          - {os: ubuntu-18.04, m32: 1}
          - {os: ubuntu-20.04, m32: 1}
        include:
          # Build GCC 10 on ubuntu-20.04
          - os: ubuntu-20.04
            compiler: { cc: gcc-10, cxx: g++-10 }
            m32: 0
    runs-on: ${{ matrix.os }}
    name: Build | ${{ matrix.os }} | ${{ matrix.compiler.cc }} ${{ matrix.m32 && '| -m32' || '' }}
    env:
      CI_BUILD_STAGE_NAME: build
      CI_RUNS_ON: ${{ matrix.os }}
      CI_M32: ${{ matrix.m32 }}
      CC: ${{ matrix.compiler.cc }}
      CXX: ${{ matrix.compiler.cxx }}
      CACHE_BASE_KEY: build-${{ matrix.os }}-${{ matrix.compiler.cc }}-m32=${{ matrix.m32 }}
      CCACHE_MAXSIZE: 250M # Per build matrix entry (2000M in total)
      VERILATOR_ARCHIVE: verilator-${{ github.sha }}-${{ matrix.os }}-${{ matrix.compiler.cc }}${{ matrix.m32 && '-m32' || '' }}.tar.gz
    steps:

    - name: Checkout
      uses: actions/checkout@v3
      with:
        path: repo

    - name: Cache $CCACHE_DIR
      uses: actions/cache@v3
      env:
        CACHE_KEY: ${{ env.CACHE_BASE_KEY }}-ccache
      with:
        path: ${{ env.CCACHE_DIR }}
        key: ${{ env.CACHE_KEY }}-${{ github.sha }}
        restore-keys: |
          ${{ env.CACHE_KEY }}-

    - name: Install packages for build
      run: ./ci/ci-install.bash

    - name: Build
      run: ./ci/ci-script.bash

    - name: Tar up repository
      working-directory: ${{ github.workspace }}
      run: tar --posix -c -z -f ${{ env.VERILATOR_ARCHIVE }} repo

    - name: Upload tar archive
      uses: actions/upload-artifact@v3
      with:
        path: ${{ github.workspace }}/${{ env.VERILATOR_ARCHIVE }}
        name: ${{ env.VERILATOR_ARCHIVE }}


  test:
    needs: build
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-22.04, ubuntu-20.04]
        compiler:
          - { cc: clang, cxx: clang++ }
          - { cc: gcc,   cxx: g++     }
        m32: [0, 1]
        suite: [dist-vlt-0, dist-vlt-1, dist-vlt-2, vltmt-0, vltmt-1]
        exclude:
          # Build pull requests only with ubuntu-22.04 and without m32
          - os:  ${{ github.event_name == 'pull_request' && 'ubuntu-18.04' || 'do-not-exclude' }}
          - os:  ${{ github.event_name == 'pull_request' && 'ubuntu-20.04' || 'do-not-exclude' }}
          - m32: ${{ github.event_name == 'pull_request' && 1              || 'do-not-exclude' }}
          # Build -m32 only on ubuntu-22.04
          - {os: ubuntu-18.04, m32: 1}
          - {os: ubuntu-20.04, m32: 1}
        include:
          # Test with GCC 10 on ubuntu-20.04 without m32
          - {os: ubuntu-20.04, compiler: { cc: gcc-10, cxx: g++-10 }, m32: 0, suite: dist-vlt-0}
          - {os: ubuntu-20.04, compiler: { cc: gcc-10, cxx: g++-10 }, m32: 0, suite: dist-vlt-1}
          - {os: ubuntu-20.04, compiler: { cc: gcc-10, cxx: g++-10 }, m32: 0, suite: dist-vlt-2}
          - {os: ubuntu-20.04, compiler: { cc: gcc-10, cxx: g++-10 }, m32: 0, suite: vltmt-0}
          - {os: ubuntu-20.04, compiler: { cc: gcc-10, cxx: g++-10 }, m32: 0, suite: vltmt-1}
    runs-on: ${{ matrix.os }}
    name: Test | ${{ matrix.os }} | ${{ matrix.compiler.cc }} | ${{ matrix.suite }} ${{ matrix.m32 && '| -m32' || '' }}
    env:
      CI_BUILD_STAGE_NAME: test
      CI_RUNS_ON: ${{ matrix.os }}
      CI_M32: ${{ matrix.m32 }}
      CC: ${{ matrix.compiler.cc }}
      CXX: ${{ matrix.compiler.cxx }}
      CACHE_BASE_KEY: test-${{ matrix.os }}-${{ matrix.compiler.cc }}-m32=${{ matrix.m32 }}-${{ matrix.suite }}
      CCACHE_MAXSIZE: 64M # Per build matrix entry (2160M in total)
      VERILATOR_ARCHIVE: verilator-${{ github.sha }}-${{ matrix.os }}-${{ matrix.compiler.cc }}${{ matrix.m32 && '-m32' || '' }}.tar.gz
    steps:

    - name: Download tar archive
      uses: actions/download-artifact@v3
      with:
        name: ${{ env.VERILATOR_ARCHIVE }}
        path: ${{ github.workspace }}

    - name: Unpack tar archive
      working-directory: ${{ github.workspace }}
      run: tar -x -z -f ${{ env.VERILATOR_ARCHIVE }}

    - name: Cache $CCACHE_DIR
      uses: actions/cache@v3
      env:
        CACHE_KEY: ${{ env.CACHE_BASE_KEY }}-ccache
      with:
        path: ${{ env.CCACHE_DIR }}
        key: ${{ env.CACHE_KEY }}-${{ github.sha }}
        restore-keys: |
          ${{ env.CACHE_KEY }}-

    - name: Install test dependencies
      run: ./ci/ci-install.bash

    - name: Test
      env:
        TESTS: ${{ matrix.suite }}
      run: ./ci/ci-script.bash