name: CI

on:
  push: # Run CI for all branches except GitHub merge queue tmp branches
    branches-ignore:
    - "gh-readonly-queue/**"
  pull_request: # Run CI for PRs on any branch
  merge_group: # Run CI for the GitHub merge queue

jobs:
  # Check build succeeds for each f3discovery chapter containing example code.
  build-f3discovery-chapter:
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        chapter:
          - 05-led-roulette
          - 06-hello-world
          - 07-registers
          - 08-leds-again
          - 09-clocks-and-timers
          - 11-usart
          - 14-i2c
          - 15-led-compass
          - 16-punch-o-meter
    steps:
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          target: thumbv7em-none-eabihf
      - name: Build chapter
        working-directory: f3discovery/src/${{ matrix.chapter }}
        run: cargo build --target thumbv7em-none-eabihf
      - name: Build chapter examples
        working-directory: f3discovery/src/${{ matrix.chapter }}
        run: cargo build --target thumbv7em-none-eabihf --examples

  # Check build succeeds for f3discovery docs.
  build-f3discovery-doc:
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          target: thumbv7em-none-eabihf
      - name: Build docs
        run: cargo doc --target thumbv7em-none-eabihf
        working-directory: f3discovery

  # Check a build succeeds for each microbit chapter that contains example code.
  build-microbit-chapter:
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        chapter:
          - 05-led-roulette
          - 07-uart
          - 08-i2c
          - 09-led-compass
          - 10-punch-o-meter
    steps:
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          target: thumbv6m-none-eabi
      - run: rustup target add thumbv7em-none-eabihf
      - name: Build chapter micro:bit v1
        working-directory: microbit/src/${{ matrix.chapter }}
        run: cargo build --features v1 --target thumbv6m-none-eabi
      - name: Build chapter micro:bit v2
        working-directory: microbit/src/${{ matrix.chapter }}
        run: cargo build --features v2 --target thumbv7em-none-eabihf

  # Check build succeeds for microbit docs.
  build-microbit-doc:
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          target: thumbv6m-none-eabi
      - run: rustup target add thumbv7em-none-eabihf
      - name: Build docs for micro:bit v1
        run: cargo doc --features v1 --target thumbv6m-none-eabi
        working-directory: microbit
      - name: Build docs for micro:bit v2
        run: cargo doc --features v2 --target thumbv7em-none-eabihf
        working-directory: microbit

  # Build the book HTML itself and optionally publish it.
  build-book:
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v2
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: stable
          target: thumbv7em-none-eabihf
      - run: rustup target add thumbv6m-none-eabi

      - name: Install Python dependencies
        run: |
          pip3 install --user python-dateutil linkchecker
      - name: Put pip binary directory into path
        run: echo "~/.local/bin" >> $GITHUB_PATH

      - name: Cache Cargo installed binaries
        uses: actions/cache@v1
        id: cache-cargo
        with:
          path: ~/cargo-bin
          key: cache-cargo
      - name: Install mdbook
        if: steps.cache-cargo.outputs.cache-hit != 'true'
        uses: actions-rs/install@v0.1
        with:
          crate: mdbook
          version: latest
      - name: Copy mdbook to cache directory
        if: steps.cache-cargo.outputs.cache-hit != 'true'
        run: |
          mkdir ~/cargo-bin
          cp ~/.cargo/bin/mdbook ~/cargo-bin
      - name: Put new cargo binary directory into path
        run: echo "~/cargo-bin" >> $GITHUB_PATH

      - name: Build f3discovery book
        working-directory: f3discovery
        run: mkdir target && mdbook build
      - name: Check microbit links
        working-directory: f3discovery
        run: linkchecker --ignore-url "print.html" book

      - name: Build microbit book
        working-directory: microbit
        run: mkdir target && mdbook build
      - name: Check microbit links
        working-directory: microbit
        run: linkchecker --ignore-url "print.html" book

      - name: Build front page
        run: mdbook build
      - name: Check links
        run: linkchecker book

      - name: Collect books
        run: |
          mv f3discovery/book book/f3discovery
          mv microbit/book book/microbit

      - name: Deploy book
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: book
          force_orphan: true