name: "Go"
on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

jobs:
  generate:
    runs-on: ubuntu-latest
    steps:
    - id: setup
      run: |
        if ! [[ -z "${{ secrets.GO_TOKEN }}" ]]; then
          echo ::set-output name=has_token::true
        else
          echo ::set-output name=has_token::false
        fi
    - run: |
        jq -nc '{"state": "pending", "context": "go tests"}' | \
        curl -sL -X POST -d @- \
            -H "Content-Type: application/json" \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            "${{ github.event.pull_request.statuses_url }}"
      if: github.event_name == 'pull_request'
    - uses: actions/checkout@v2
      if: github.event_name == 'push' && steps.setup.outputs.has_token == 'true'
      with:
        fetch-depth: 0
        token: '${{ secrets.GO_TOKEN }}'
    - uses: actions/checkout@v2
      if: github.event_name == 'pull_request' || steps.setup.outputs.has_token != 'true'
      with:
        fetch-depth: 0
    - uses: actions/setup-go@v2
      with:
        go-version: 1.14
    - uses: actions/cache@v1
      with:
        path: ~/go/pkg/mod
        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
        restore-keys: |
          ${{ runner.os }}-go-
    - uses: actions/cache@v1
      with:
        path: ~/.cache/bazel
        key: ${{ runner.os }}-bazel-${{ hashFiles('WORKSPACE') }}
        restore-keys: |
          ${{ runner.os }}-bazel-
      # Create gopath to merge the changes. The first execution will create
      # symlinks to the cache, e.g. bazel-bin. Once the cache is setup, delete
      # old gopath files that may exist from previous runs (and could contain
      # files that are now deleted). Then run gopath again for good.
    - run: |
        make build TARGETS="//:gopath"
        rm -rf bazel-bin/gopath
        make build TARGETS="//:gopath"
    - run: tools/go_branch.sh
    - run: git checkout go && git clean -f
    - run: go build ./...
    - if: github.event_name == 'push'
      run: |
        git remote add upstream "https://github.com/${{ github.repository }}"
        git push upstream go:go
    - if: ${{ success() && github.event_name == 'pull_request' }}
      run: |
        jq -nc '{"state": "success", "context": "go tests"}' | \
        curl -sL  -X POST -d @- \
            -H "Content-Type: application/json" \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            "${{ github.event.pull_request.statuses_url }}"
    - if: ${{ failure() && github.event_name == 'pull_request' }}
      run: |
        jq -nc '{"state": "failure", "context": "go tests"}' | \
        curl -sL  -X POST -d @- \
            -H "Content-Type: application/json" \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            "${{ github.event.pull_request.statuses_url }}"