name: Go Matrix

on:
  push:
    branches:
      - master
  pull_request:

jobs:

  cross:
    name: Go
    runs-on: ${{ matrix.os }}
    env:
      CGO_ENABLED: 0

    strategy:
      matrix:
        go-version: [ 1.15, 1.16, 1.x ]
        os: [ubuntu-latest, macos-latest, windows-latest]

    steps:
      # https://github.com/marketplace/actions/setup-go-environment
      - name: Set up Go ${{ matrix.go-version }}
        uses: actions/setup-go@v2
        with:
          go-version: ${{ matrix.go-version }}

      # https://github.com/marketplace/actions/checkout
      - name: Checkout code
        uses: actions/checkout@v2

      # https://github.com/marketplace/actions/cache
      - name: Cache Go modules
        uses: actions/cache@v2
        with:
          # In order:
          # * Module download cache
          # * Build cache (Linux)
          # * Build cache (Mac)
          # * Build cache (Windows)
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
            ~/Library/Caches/go-build
            %LocalAppData%\go-build
          key: ${{ runner.os }}-${{ matrix.go-version }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-${{ matrix.go-version }}-go-

      - name: Test
        run: go test -v -cover ./...

      - name: Build
        run: go build -v -ldflags "-s -w" -trimpath -o ./dist/lego ./cmd/lego/