name: Lint

on:
  push:
    branches:
    - main
  pull_request:

jobs:
  quick-checks:
    runs-on: ubuntu-latest
    steps:
      - name: Fetch Wenet
        uses: actions/checkout@v1
      - name: Checkout PR tip
        run: |
          set -eux
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            # We are on a PR, so actions/checkout leaves us on a merge commit.
            # Check out the actual tip of the branch.
            git checkout ${{ github.event.pull_request.head.sha }}
          fi
          echo ::set-output name=commit_sha::$(git rev-parse HEAD)
        id: get_pr_tip
      - name: Ensure no tabs
        run: |
          (! git grep -I -l $'\t' -- . ':(exclude)*.svg' ':(exclude)**Makefile' ':(exclude)**/contrib/**' ':(exclude)third_party' ':(exclude).gitattributes' ':(exclude).gitmodules' || (echo "The above files have tabs; please convert them to spaces"; false))
      - name: Ensure no trailing whitespace
        run: |
          (! git grep -I -n $' $' -- . ':(exclude)third_party' ':(exclude).gitattributes' ':(exclude).gitmodules' || (echo "The above files have trailing whitespace; please remove them"; false))

  flake8-py3:
    runs-on: ubuntu-latest
    steps:
      - name: Setup Python
        uses: actions/setup-python@v1
        with:
          python-version: 3.x
          architecture: x64
      - name: Fetch Wenet
        uses: actions/checkout@v1
      - name: Checkout PR tip
        run: |
          set -eux
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            # We are on a PR, so actions/checkout leaves us on a merge commit.
            # Check out the actual tip of the branch.
            git checkout ${{ github.event.pull_request.head.sha }}
          fi
          echo ::set-output name=commit_sha::$(git rev-parse HEAD)
        id: get_pr_tip
      - name: Run flake8
        run: |
          set -eux
          pip install flake8==3.8.2 flake8-bugbear flake8-comprehensions flake8-executable flake8-pyi==20.5.0 mccabe pycodestyle==2.6.0 pyflakes==2.2.0
          flake8 --version
          flake8 | tee ${GITHUB_WORKSPACE}/flake8-output.txt
      - name: Add annotations
        uses: pytorch/add-annotations-github-action@master
        with:
          check_name: 'flake8-py3'
          linter_output_path: 'flake8-output.txt'
          commit_sha: ${{ steps.get_pr_tip.outputs.commit_sha }}
          regex: '^(?<filename>.*?):(?<lineNumber>\d+):(?<columnNumber>\d+): (?<errorCode>\w\d+) (?<errorDesc>.*)'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  cpplint:
    runs-on: ubuntu-latest
    steps:
      - name: Setup Python
        uses: actions/setup-python@v1
        with:
          python-version: 3.x
          architecture: x64
      - name: Fetch Wenet
        uses: actions/checkout@v1
      - name: Checkout PR tip
        run: |
          set -eux
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            # We are on a PR, so actions/checkout leaves us on a merge commit.
            # Check out the actual tip of the branch.
            git checkout ${{ github.event.pull_request.head.sha }}
          fi
          echo ::set-output name=commit_sha::$(git rev-parse HEAD)
        id: get_pr_tip
      - name: Run cpplint
        run: |
          set -eux
          pip install cpplint
          cpplint --version
          cpplint --recursive .
          if [ $? != 0 ]; then exit 1; fi