name: CI

on: [ push, pull_request ]

jobs:
  skip_check:
    name: Skip Check
    continue-on-error: true
    runs-on: ubuntu-latest
    outputs:
      should_skip: ${{ steps.skip_check.outputs.should_skip }}
    steps:
      - id: skip_check
        uses: fkirc/skip-duplicate-actions@v4
        with:
          concurrent_skipping: 'same_content_newer'
          paths_ignore: '["README.md", "LICENSE"]'

  build:
    needs: skip_check
    name: ${{ matrix.name || 'Build' }}
    if: ${{ needs.skip_check.outputs.should_skip != 'true' }}
    runs-on: ${{ matrix.os }}
    defaults:
      run:
        shell: ${{ matrix.shell || 'sh' }}
    strategy:
      matrix:
        include:
        - name: Ubuntu
          os: ubuntu-latest
        - name: MacOS
          os: macos-latest
        - name: Windows
          os: windows-latest
          shell: msys2 {0}
      # complete all jobs
      fail-fast: false
    steps:
    - name: Install MSYS2 (Windows)
      if: matrix.os == 'windows-latest'
      uses: msys2/setup-msys2@v2
      with:
        path-type: inherit
        install: curl unzip make diffutils mingw-w64-x86_64-gcc mingw-w64-x86_64-gmp
    - name: Install Elan
      shell: bash -euo pipefail {0}
      run: |
        curl -sSfL https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh | sh -s -- -y --default-toolchain none
        echo "$HOME/.elan/bin" >> $GITHUB_PATH
    - name: Checkout
      uses: actions/checkout@v2
    - name: Check Lean
      run: lean --version
    - name: Build & Time
      run: ./time.sh -j4
    - name: Upload Build
      continue-on-error: true
      uses: actions/upload-artifact@v2
      with:
        name: ${{ matrix.os }}
        path: build
    - name: Check Lake
      run: make check-lake
    - name: Test Lake
      run: make test-ci
    - name: Time Bootstrap
      run: make time-bootstrap
    - name: Check Bootstrap
      run: make check-bootstrap
    - name: Test Bootstrapped Lake
      run: make test-bootstrapped -j4