name: Bazel Build and Test

on:
  push:
    branches: [ main ]
  workflow_dispatch:

# Ensure that only a single job or workflow using the same
# concurrency group will run at a time. This would cancel
# any in-progress jobs in the same github workflow and github
# ref (e.g. refs/heads/main or refs/pull/<pr_number>/merge).
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true


jobs:
  ubuntu-build:
    name: ubuntu-x86_64
    runs-on: ubuntu-latest

    steps:
    - name: Checkout torch-mlir
      uses: actions/checkout@v3

    # We fetch the submodules sequentially to prevent multiple threads from
    # trampling the index.lock file.
    - name: Fetch submodules
      run: git submodule update --init --force --depth=1 --jobs 1

    # Continually update cache even if there's a "hit" during
    # restore to avoid the cache going stale over time
    # https://github.com/actions/cache/blob/main/workarounds.md#update-a-cache
    - name: Setup cache for bazel
      uses: actions/cache@v3
      with:
        path: ~/.cache/bazel
        key: torch_mlir-bazel-build-cache-${{ runner.os }}-${{ github.sha }}
        restore-keys: |
          torch_mlir-bazel-build-cache-${{ runner.os }}

    # Change bazel cache directory to root ownership
    # to allow writing to it from within the docker container.
    # If no cache hits, this directory is not present
    # so don't run chown (will error otherwise).
    - name: Set bazel cache permissions
      run: |
        if [ -d "${HOME}/.cache/bazel" ]; then
          sudo chown -R root:root "${HOME}/.cache/bazel"
        fi

    - name: Build docker image
      run: |
        docker build -f utils/bazel/docker/Dockerfile \
                     -t torch-mlir:ci \
                     .

    - name: Bazel build torch-mlir
      run: |
        docker run --rm \
                   -v "$(pwd)":"/opt/src/torch-mlir" \
                   -v "${HOME}/.cache/bazel":"/root/.cache/bazel" \
                   torch-mlir:ci \
                   bazel build @torch-mlir//:torch-mlir-opt

    - name: Bazel test torch-mlir (lit tests)
      run: |
        docker run --rm \
                   -v "$(pwd)":"/opt/src/torch-mlir" \
                   -v "${HOME}/.cache/bazel":"/root/.cache/bazel" \
                   torch-mlir:ci \
                   bazel test @torch-mlir//test/...

    - name: Verify buildifier was run (bazel lint)
      run: |
        docker run --rm \
                   -v "$(pwd)":"/opt/src/torch-mlir" \
                   -v "${HOME}/.cache/bazel":"/root/.cache/bazel" \
                   torch-mlir:ci \
                   bazel run @torch-mlir//:buildifier
        if [ -n "$(git status --porcelain)" ]; then
          echo "Please 'bazel run @torch-mlir//:buildifier' and commit changes."
          exit 1
        fi

    # Switch back bazel cache directory to user ownership
    # to allow GHA post-cache step to save cache without
    # permissions issue.
    - name: Switch bazel cache permissions
      run: |
        if [ -d "${HOME}/.cache/bazel" ]; then
          sudo chown -R "$USER":"$USER" "${HOME}/.cache/bazel"
        fi

    - name: Send mail
      if: failure()
      uses: dawidd6/action-send-mail@v3
      with:
        server_address: ${{ secrets.SMTP_SERVER }}
        server_port: ${{ secrets.SMTP_PORT }}
        username: ${{ secrets.SMTP_USERNAME }}
        password: ${{ secrets.SMTP_PASSWORD }}
        subject: GitHub Action Bazel Build and Test failed!
        body: Bazel Build job failed! See https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }} for more information.
        to: ${{ secrets.MAIL_RECEIVER }}
        from: Torch-MLIR Bazel Build GitHub Actions