name: Backend CI

on:
  push:
    paths:
      - '.github/workflows/backend.yml'
      - 'backend/**'
      - '!frontend/**'

env:
  CARGO_TERM_COLOR: always

defaults:
  run:
    working-directory: ./backend

jobs:
  build:
    name: Check Code
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v2.3.4

      - name: Install Rust stable toolchain
        uses: actions-rs/toolchain@v1.0.7
        with:
          profile: minimal
          toolchain: stable
          override: true

      - name: Rust Cache
        uses: Swatinem/rust-cache@v1.3.0
        with:
          working-directory: backend

      - name: Build
        run: cargo check --all-targets

  docker:
    name: Push tagged images to docker
    runs-on: ubuntu-latest
    steps:
    - name: Checkout sources
      uses: actions/checkout@v2.3.4

    - name: Login to Dockerhub
      uses: docker/login-action@v1
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_PASSWORD }}

    - name: Build and push template image for tagged commit
      uses: docker/build-push-action@v2 # https://github.com/docker/build-push-action
      with:
        context: './backend'
        push: ${{ startsWith(github.ref, 'refs/tags/') }}
        tags: parity/substrate-telemetry-backend:latest
        # add_git_labels: true

  fmt:
    name: Run rustfmt
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v2.3.4

      - name: Install Rust stable toolchain
        uses: actions-rs/toolchain@v1.0.7
        with:
          profile: minimal
          toolchain: stable
          override: true
          components: clippy, rustfmt

      - name: Rust Cache
        uses: Swatinem/rust-cache@v1.3.0
        with:
          working-directory: backend

      - name: Cargo fmt
        run: cargo fmt --all -- --check

  docs:
    name: Check Documentation
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v2.3.4

      - name: Install Rust stable toolchain
        uses: actions-rs/toolchain@v1.0.7
        with:
          profile: minimal
          toolchain: stable
          override: true

      - name: Rust Cache
        uses: Swatinem/rust-cache@v1.3.0
        with:
          working-directory: backend

      - name: Check internal documentation links
        run: RUSTDOCFLAGS="--deny broken_intra_doc_links" cargo doc --verbose --workspace --no-deps --document-private-items

  tests:
    name: Run tests
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v2.3.4

      - name: Install Rust stable toolchain
        uses: actions-rs/toolchain@v1.0.7
        with:
          profile: minimal
          toolchain: stable
          override: true

      - name: Rust Cache
        uses: Swatinem/rust-cache@v1.3.0
        with:
          working-directory: backend

      - name: Cargo test
        run: cargo test --verbose --jobs 1

  e2e:
    name: Run potentially brittle E2E tests
    continue-on-error: true
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v2.3.4

      - name: Install Rust stable toolchain
        uses: actions-rs/toolchain@v1.0.7
        with:
          profile: minimal
          toolchain: stable
          override: true

      - name: Rust Cache
        uses: Swatinem/rust-cache@v1.3.0
        with:
          working-directory: backend

      - name: Cargo test
        run: cargo test --verbose --jobs 1 e2e -- --ignored