# The name of your workflow. GitHub displays the names of your workflows on your repository's "Actions" tab
name: Rust

# To automatically trigger the workflow
on:
  # NB: this differs from the book's project!
  # These settings allow us to run this specific CI pipeline for PRs against
  # this specific branch (a.k.a. book chapter).
  push:
    branches:
      - main
  pull_request:
    types: [opened, synchronize, reopened]
    branches:
      - main

env:
  CARGO_TERM_COLOR: always
  SQLX_VERSION: 0.8.6
  SQLX_FEATURES: "rustls,postgres"
  APP_USER: app
  APP_USER_PWD: secret
  APP_DB_NAME: newsletter

# A workflow run is made up of one or more jobs, which run in parallel by default
# Each job runs in a runner environment specified by runs-on
jobs:
  # Unique identifier of our job (`job_id`)
  test:
    # Sets the name `Test` for the job, which is displayed in the GitHub UI
    name: Test
    # Containers must run in Linux based operating systems
    runs-on: ubuntu-latest
    # Service containers to run alongside the `test` container job
    services:
      # Label used to access the service container
      postgres:
        # Docker Hub image
        image: postgres
        # Environment variables scoped only for the `postgres` element
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: password
          POSTGRES_DB: postgres
        # When you map ports using the ports keyword, GitHub uses the --publish command to publish the container’s ports to the Docker host
        # Opens tcp port 5432 on the host and service container
        ports:
          - 5432:5432
    steps:
      # Downloads a copy of the code in your repository before running CI tests
      - name: Check out repository code
        # The uses keyword specifies that this step will run v4 of the actions/checkout action.
        # This is an action that checks out your repository onto the runner, allowing you to run scripts or other actions against your code (such as build and test tools).
        # You should use the checkout action any time your workflow will run against the repository's code.
        uses: actions/checkout@v4
      # This GitHub Action installs a Rust toolchain using rustup. It is designed for one-line concise usage and good defaults.
      # It also takes care of caching intermediate build artifacts.
      - name: Install the Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@v1
      - name: Install sqlx-cli
        run: cargo install sqlx-cli
          --version=${{ env.SQLX_VERSION }}
          --features ${{ env.SQLX_FEATURES }}
          --no-default-features
          --locked
      - name: Create app user in Postgres
        run: |
          sudo apt-get install postgresql-client

          # Create the application user
          CREATE_QUERY="CREATE USER ${APP_USER} WITH PASSWORD '${APP_USER_PWD}';"
          PGPASSWORD="password" psql -U "postgres" -h "localhost" -c "${CREATE_QUERY}"

          # Grant create db privileges to the app user
          GRANT_QUERY="ALTER USER ${APP_USER} CREATEDB;"
          PGPASSWORD="password" psql -U "postgres" -h "localhost" -c "${GRANT_QUERY}"
      - name: Migrate database
        run: SKIP_DOCKER=true ./scripts/init_db.sh
      - name: Run tests
        run: cargo test
      - name: Check that queries are fresh
        run: cargo sqlx prepare --check --workspace

  # `fmt` container job
  fmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install the Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          components: rustfmt
      - name: Enforce formatting
        run: cargo fmt --check

  # `clippy` container job
  clippy:
    name: Clippy
    runs-on: ubuntu-latest
    env:
      # This environment variable forces sqlx to use its offline mode,
      # which means that it will not attempt to connect to a database
      # when running the tests. It'll instead use the cached query results.
      # We check that the cached query results are up-to-date in another job,
      # to speed up the overall CI pipeline.
      # This will all be covered in detail in chapter 5.
      SQLX_OFFLINE: true
    steps:
      - uses: actions/checkout@v4
      - name: Install the Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          components: clippy
      - name: Linting
        run: cargo clippy -- -D warnings

  # `coverage` container job
  coverage:
    name: Code coverage
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: password
          POSTGRES_DB: postgres
        ports:
          - 5432:5432
    steps:
      - uses: actions/checkout@v4
      - name: Install the Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          components: llvm-tools-preview
      - name: Install sqlx-cli
        run: cargo install sqlx-cli
          --version=${{ env.SQLX_VERSION }}
          --features ${{ env.SQLX_FEATURES }}
          --no-default-features
          --locked
      - name: Create app user in Postgres
        run: |
          sudo apt-get install postgresql-client

          # Create the application user
          CREATE_QUERY="CREATE USER ${APP_USER} WITH PASSWORD '${APP_USER_PWD}';"
          PGPASSWORD="password" psql -U "postgres" -h "localhost" -c "${CREATE_QUERY}"

          # Grant create db privileges to the app user
          GRANT_QUERY="ALTER USER ${APP_USER} CREATEDB;"
          PGPASSWORD="password" psql -U "postgres" -h "localhost" -c "${GRANT_QUERY}"
      - name: Migrate database
        run: SKIP_DOCKER=true ./scripts/init_db.sh
      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@cargo-llvm-cov
      - name: Generate code coverage
        run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
      - name: Generate report
        run: cargo llvm-cov report --html --output-dir coverage
      - uses: actions/upload-artifact@v4
        with:
          name: "Coverage report"
          path: coverage/