name: Continuous Integration

on:
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

# ensure that the workflow is only triggered once per PR,  subsequent pushes to the PR will cancel
# and restart the workflow. See https://docs.github.com/en/actions/using-jobs/using-concurrency
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

# lint, clippy and coverage jobs are intentionally early in the workflow to catch simple formatting,
# typos, and missing tests as early as possible. This allows us to fix these and resubmit the PR
# without having to wait for the comprehensive matrix of tests to complete.
jobs:
  # Lint the formatting of the codebase.
  lint-formatting:
    name: Check Formatting
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@nightly
        with: { components: rustfmt }
      - uses: Swatinem/rust-cache@v2
      - uses: taiki-e/install-action@v2
        with:
          tool: taplo-cli
      - run: cargo xtask format --check

  # Check for typos in the codebase.
  # See <https://github.com/crate-ci/typos/>
  lint-typos:
    name: Check Typos
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: crate-ci/typos@master

  # Check for any disallowed dependencies in the codebase due to license / security issues.
  # See <https://github.com/EmbarkStudios/cargo-deny>
  dependencies:
    name: Check Dependencies
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: taiki-e/install-action@cargo-deny
      - run: cargo deny --log-level info --all-features check

  # Check for any unused dependencies in the codebase.
  # See <https://github.com/bnjbvr/cargo-machete/>
  cargo-machete:
    name: Check Unused Dependencies
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: bnjbvr/cargo-machete@v0.7.0

  # Run cargo clippy.
  lint-clippy:
    name: Check Clippy
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with: { components: clippy }
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask clippy

  # Run markdownlint on all markdown files in the repository.
  lint-markdown:
    name: Check Markdown
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: DavidAnson/markdownlint-cli2-action@v19
        with:
          globs: |
            '**/*.md'
            '!target'

  # Run cargo coverage. This will generate a coverage report and upload it to codecov.
  # <https://app.codecov.io/gh/ratatui/ratatui>
  coverage:
    name: Coverage Report
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: llvm-tools
      - uses: taiki-e/install-action@cargo-llvm-cov
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask coverage
      - uses: codecov/codecov-action@v5
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
          fail_ci_if_error: true

  # Run cargo check. This is a fast way to catch any obvious errors in the code.
  check:
    name: Check ${{ matrix.os }} ${{ matrix.toolchain }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        toolchain: ["1.74.0", "stable"]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.toolchain }}
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask check --all-features

  # Check if README.md is up-to-date with the crate's documentation.
  check-readme:
    name: Check README
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: Swatinem/rust-cache@v2
      - uses: taiki-e/install-action@cargo-rdme
      - run: cargo xtask readme --check

  # Run cargo rustdoc with the same options that would be used by docs.rs, taking into account the
  # package.metadata.docs.rs configured in Cargo.toml. https://github.com/dtolnay/cargo-docs-rs
  lint-docs:
    name: Check Docs
    runs-on: ubuntu-latest
    env:
      RUSTDOCFLAGS: -Dwarnings
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@nightly
      - uses: dtolnay/install@cargo-docs-rs
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask docs

  # Run cargo test on the documentation of the crate. This will catch any code examples that don't
  # compile, or any other issues in the documentation.
  test-docs:
    name: Test Docs
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask test-docs

  # Run cargo test on the libraries of the crate.
  test-libs:
    name: Test Libs ${{ matrix.toolchain }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        toolchain: ["1.74.0", "stable"]
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask test-libs

  # Run cargo test on all the backends.
  test-backends:
    name: Test ${{matrix.backend}} on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        backend: [crossterm, termion, termwiz]
        exclude:
          # termion is not supported on windows
          - os: windows-latest
            backend: termion
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - run: cargo xtask test-backend ${{ matrix.backend }}