name: Build
on:
  pull_request:
  push:
    branches:
      - master
      - staging
      - trying

env:
  CARGO_TERM_COLOR: always

jobs:
  # Run cargo fmt --check, includes macros/
  style:
    name: style
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v1

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

      - name: cargo fmt --check
        uses: actions-rs/cargo@v1
        with:
          command: fmt
          args: --all -- --check

  # Compilation check
  check:
    name: check
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        target:
          - thumbv7m-none-eabi
          - thumbv6m-none-eabi
          - x86_64-unknown-linux-gnu
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache cargo dependencies
        uses: actions/cache@v2
        with:
          path: |
            - ~/.cargo/bin/
            - ~/.cargo/registry/index/
            - ~/.cargo/registry/cache/
            - ~/.cargo/git/db/
          key: ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
            ${{ runner.OS }}-cargo-

      - name: Cache build output dependencies
        uses: actions/cache@v2
        with:
          path: target
          key: ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
            ${{ runner.OS }}-build-

      - name: Install Rust ${{ matrix.toolchain }} with target (${{ matrix.target }})
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.toolchain }}
          target: ${{ matrix.target }}
          override: true

      - name: cargo check
        uses: actions-rs/cargo@v1
        with:
          use-cross: false
          command: check
          args: --target=${{ matrix.target }}

  # Verify all examples
  checkexamples:
    name: checkexamples
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        target:
          - thumbv7m-none-eabi
          - thumbv6m-none-eabi
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache cargo dependencies
        uses: actions/cache@v2
        with:
          path: |
            - ~/.cargo/bin/
            - ~/.cargo/registry/index/
            - ~/.cargo/registry/cache/
            - ~/.cargo/git/db/
          key: ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
            ${{ runner.OS }}-cargo-

      - name: Cache build output dependencies
        uses: actions/cache@v2
        with:
          path: target
          key: ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
            ${{ runner.OS }}-build-

      - name: Install Rust ${{ matrix.toolchain }} with target (${{ matrix.target }})
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.toolchain }}
          target: ${{ matrix.target }}
          override: true
          components: llvm-tools-preview

      - name: Check the examples
        if: matrix.target == 'thumbv7m-none-eabi'
        env:
          V7: __v7
        uses: actions-rs/cargo@v1
        with:
          use-cross: false
          command: check
          args: --examples --target=${{ matrix.target }} --features __min_r1_43,${{ env.V7 }}

      # Use precompiled binutils
      - name: cargo install cargo-binutils
        uses: actions-rs/install@v0.1
        with:
          crate: cargo-binutils
          version: latest
          use-tool-cache: true

      - name: Install QEMU
        run: |
          sudo apt update
          sudo apt install -y qemu-system-arm

      - name: Run-pass tests
        run: |
          # Print the path
          echo $PATH

          arm_example() {
              local COMMAND=$1
              local EXAMPLE=$2
              local BUILD_MODE=$3
              local FEATURES=$4
              local BUILD_NUM=$5

              if [ $BUILD_MODE = "release" ]; then
                  local RELEASE_FLAG="--release"
              else
                  local RELEASE_FLAG=""
              fi

              if [ -n "$FEATURES" ]; then
                  local FEATURES_FLAG="--features $FEATURES"
                  local FEATURES_STR=${FEATURES/,/_}_
              else
                  local FEATURES_FLAG=""
                  local FEATURES_STR=""
              fi
              local CARGO_FLAGS="--example $EXAMPLE --target ${{ matrix.target }} $RELEASE_FLAG $FEATURES_FLAG"

              if [ $COMMAND = "run" ]; then
                  cargo $COMMAND $CARGO_FLAGS | diff -u ci/expected/$EXAMPLE.run -
              else
                  cargo $COMMAND $CARGO_FLAGS
              fi
              cargo objcopy $CARGO_FLAGS  -- -O ihex ci/builds/${EXAMPLE}_${FEATURES_STR}${BUILD_MODE}_${BUILD_NUM}.hex
          }

          mkdir -p ci/builds
          exs=(
              idle
              init
              hardware
              preempt
              binds

              resource
              lock
              late
              only-shared-access

              task
              message
              capacity

              types
              not-send
              not-sync
              shared-with-init

              generics
              cfg
              pool
              ramfunc

              peripherals-taken
          )

          for ex in ${exs[@]}; do
              if [ $ex = pool ]; then
                  if [ ${{ matrix.target }} = thumbv6m-none-eabi ]; then
                      continue
                  fi

                  td=$(mktemp -d)

                  cargo run --example $ex --target ${{ matrix.target }} --features __v7 >\
                          $td/pool.run
                  grep 'foo(0x2' $td/pool.run
                  grep 'bar(0x2' $td/pool.run
                  cargo objcopy --example $ex --target ${{ matrix.target }} --features __v7 -- -O ihex ci/builds/${ex}___v7_debug_1.hex

                  cargo run --example $ex --target ${{ matrix.target }} --features __v7 --release >\
                          $td/pool.run
                  grep 'foo(0x2' $td/pool.run
                  grep 'bar(0x2' $td/pool.run
                  cargo objcopy --example $ex --target ${{ matrix.target }} --features __v7 --release -- -O ihex ci/builds/${ex}___v7_release_1.hex

                  rm -rf $td

                  continue
              fi

              if [ $ex = types ]; then
                  if [ ${{ matrix.target }} = thumbv6m-none-eabi ]; then
                      continue
                  fi

                  arm_example "run" $ex "debug" "__v7" "1"
                  arm_example "run" $ex "release" "__v7" "1"

                  continue
              fi

              arm_example "run" $ex "debug" "" "1"
              if [ $ex = types ]; then
                  arm_example "run" $ex "release" "" "1"
              else
                  arm_example "build" $ex "release" "" "1"
              fi
          done

          built=()
          cargo clean
          for ex in ${exs[@]}; do
              if [ $ex = types ] || [ $ex = pool ]; then
                  if [ ${{ matrix.target }} = thumbv6m-none-eabi ]; then
                      continue
                  fi

                  arm_example "build" $ex "debug" "__v7" "2"
                  cmp ci/builds/${ex}___v7_debug_1.hex \
                      ci/builds/${ex}___v7_debug_2.hex
                  arm_example "build" $ex "release" "__v7" "2"
                  cmp ci/builds/${ex}___v7_release_1.hex \
                      ci/builds/${ex}___v7_release_2.hex
              else
                  arm_example "build" $ex "debug" "" "2"
                  cmp ci/builds/${ex}_debug_1.hex \
                      ci/builds/${ex}_debug_2.hex
                  arm_example "build" $ex "release" "" "2"
                  cmp ci/builds/${ex}_release_1.hex \
                      ci/builds/${ex}_release_2.hex
              fi

              built+=( $ex )
          done

          ( cd target/${{ matrix.target }}/release/examples/ && size ${built[@]} )


  # Check the correctness of macros/ crate
  checkmacros:
    name: checkmacros
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        target:
          - x86_64-unknown-linux-gnu
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache cargo dependencies
        uses: actions/cache@v2
        with:
          path: |
            - ~/.cargo/bin/
            - ~/.cargo/registry/index/
            - ~/.cargo/registry/cache/
            - ~/.cargo/git/db/
          key: ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
            ${{ runner.OS }}-cargo-

      - name: Cache build output dependencies
        uses: actions/cache@v2
        with:
          path: target
          key: ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
            ${{ runner.OS }}-build-

      - name: Install Rust ${{ matrix.toolchain }} with target (${{ matrix.target }})
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.toolchain }}
          target: ${{ matrix.target }}
          override: true

      - name: cargo check
        uses: actions-rs/cargo@v1
        with:
          use-cross: false
          command: check
          args: --manifest-path macros/Cargo.toml --target=${{ matrix.target }}

  # Run test suite for thumbv7m
  testv7:
    name: testv7
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache cargo dependencies
        uses: actions/cache@v2
        with:
          path: |
            - ~/.cargo/bin/
            - ~/.cargo/registry/index/
            - ~/.cargo/registry/cache/
            - ~/.cargo/git/db/
          key: ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-cargo-

      - name: Cache build output dependencies
        uses: actions/cache@v2
        with:
          path: target
          key: ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-build-

      - name: Install Rust
        uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          target: thumbv7m-none-eabi
          override: true

      - uses: actions-rs/cargo@v1
        with:
          use-cross: false
          command: test
          args: --test single --features __v7

  # Run test suite for thumbv6m
  testv6:
    name: testv6
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache cargo dependencies
        uses: actions/cache@v2
        with:
          path: |
            - ~/.cargo/bin/
            - ~/.cargo/registry/index/
            - ~/.cargo/registry/cache/
            - ~/.cargo/git/db/
          key: ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-cargo-

      - name: Cache build output dependencies
        uses: actions/cache@v2
        with:
          path: target
          key: ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-build-

      - name: Install Rust
        uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          target: thumbv6m-none-eabi
          override: true

      - uses: actions-rs/cargo@v1
        with:
          use-cross: false
          command: test
          args: --test single

  # Build documentation, check links
  docs:
    name: docs
    runs-on: ubuntu-20.04

    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache cargo dependencies
        uses: actions/cache@v2
        with:
          path: |
            - ~/.cargo/bin/
            - ~/.cargo/registry/index/
            - ~/.cargo/registry/cache/
            - ~/.cargo/git/db/
          key: ${{ runner.OS }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-cargo-

      - name: Cache build output dependencies
        uses: actions/cache@v2
        with:
          path: target
          key: ${{ runner.OS }}-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.OS }}-build-

      - name: Cache pip installed linkchecker
        uses: actions/cache@v2
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Set up Python 3.x
        uses: actions/setup-python@v2
        with:
        # Semantic version range syntax or exact version of a Python version
          python-version: '3.x'
          # Optional - x64 or x86 architecture, defaults to x64
          architecture: 'x64'

      # You can test your matrix by printing the current Python version
      - name: Display Python version
        run: python -c "import sys; print(sys.version)"

      - name: Install dependencies
        run: pip install git+https://github.com/linkchecker/linkchecker.git

      - name: Remove cargo-config
        run: rm -f .cargo/config

      - name: Build docs
        run: cargo doc

      - name: Check links
        run: |
          td=$(mktemp -d)
          cp -r target/doc $td/api
          linkchecker $td/api/rtic/
          linkchecker $td/api/cortex_m_rtic_macros/

  # Build the books
  mdbook:
    name: mdbook
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set up Python 3.x
        uses: actions/setup-python@v2
        with:
        # Semantic version range syntax or exact version of a Python version
          python-version: '3.x'
          # Optional - x64 or x86 architecture, defaults to x64
          architecture: 'x64'

      # You can test your matrix by printing the current Python version
      - name: Display Python version
        run: python -c "import sys; print(sys.version)"

      - name: Install dependencies
        run: pip install git+https://github.com/linkchecker/linkchecker.git

      - name: mdBook Action
        uses: peaceiris/actions-mdbook@v1.1.11
        with:
          mdbook-version: '0.3.1'

      - name: Build book in English
        run: cd book/en && mdbook build

      - name: Build book in Russian
        run: cd book/ru && mdbook build

      - name: Check links
        run: |
          td=$(mktemp -d)
          mkdir $td/book
          cp -r book/en/book $td/book/en
          cp -r book/ru/book $td/book/ru
          cp LICENSE-* $td/book/en
          cp LICENSE-* $td/book/ru

          linkchecker $td/book/en/
          linkchecker $td/book/ru/

  # Only runs when pushing to master branch
  deploy:
    name: deploy
    runs-on: ubuntu-20.04
    needs:
      - style
      - check
      - checkexamples
      - checkmacros
      - testv7
      - testv6
      - docs
      - mdbook
    # Only run this when pushing to master branch
    if: github.ref == 'refs/heads/master'
    steps:
      - uses: actions/checkout@v2

      - name: Set up Python 3.x
        uses: actions/setup-python@v2
        with:
        # Semantic version range syntax or exact version of a Python version
          python-version: '3.x'
          # Optional - x64 or x86 architecture, defaults to x64
          architecture: 'x64'

      # You can test your matrix by printing the current Python version
      - name: Display Python version
        run: python -c "import sys; print(sys.version)"

      - name: mdBook Action
        uses: peaceiris/actions-mdbook@v1.1.11
        with:
          mdbook-version: '0.3.1'
          # mdbook-version: 'latest'

      - name: Remove cargo-config
        run: rm -f .cargo/config

      - name: Build docs
        run: cargo doc

      - name: Build books
        run: |
          langs=( en ru )
          devver=( dev )
          # The latest stable must be the first element in the array
          vers=( 0.5.x 0.4.x  )

          # All releases start with "v"
          # followed by MAJOR.MINOR.PATCH, see semver.org
          # Retain MAJOR.MINOR as $stable
          stable=${vers%.*}

          echo "Stable version: $stable"

          # Create directories
          td=$(mktemp -d)
          mkdir -p $td/$devver/book/
          cp -r target/doc $td/$devver/api

          # Redirect the main site to the stable release
          sed "s|URL|$stable|g" redirect.html > $td/index.html

          # Create the redirects for dev-version
          sed 's|URL|rtic/index.html|g' redirect.html > $td/$devver/api/index.html
          sed 's|URL|book/en|g' redirect.html > $td/$devver/index.html

          # Build books
          for lang in ${langs[@]}; do
              ( cd book/$lang && mdbook build )
              cp -r book/$lang/book $td/$devver/book/$lang
              cp LICENSE-* $td/$devver/book/$lang/
          done

          # Build older versions, including stable
          root=$(pwd)
          for ver in ${vers[@]}; do
              prefix=${ver%.*}

              mkdir -p $td/$prefix/book
              src=$(mktemp -d)
              curl -L https://github.com/rtic-rs/cortex-m-rtic/archive/v${ver}.tar.gz | tar xz --strip-components 1 -C $src

              pushd $src
              rm -f .cargo/config
              cargo doc || cargo doc --features timer-queue
              cp -r target/doc $td/$prefix/api
              sed 's|URL|rtic/index.html|g' $root/redirect.html > $td/$prefix/api/index.html
              for lang in ${langs[@]}; do
                  ( cd book/$lang && mdbook build )
                  cp -r book/$lang/book $td/$prefix/book/$lang
                  cp LICENSE-* $td/$prefix/book/$lang/
              done
              sed 's|URL|book/en|g' $root/redirect.html > $td/$prefix/index.html
              popd

              rm -rf $src
          done

          # Copy the stable book to the stable alias
          cp -r $td/$stable $td/stable

          # Forward CNAME file
          cp CNAME $td/
          mv $td/ bookstodeploy

      - name: Deploy to GH-pages
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./bookstodeploy

  # Refs: https://github.com/rust-lang/crater/blob/9ab6f9697c901c4a44025cf0a39b73ad5b37d198/.github/workflows/bors.yml#L125-L149
  #
  # ALL THE PREVIOUS JOBS NEEDS TO BE ADDED TO THE `needs` SECTION OF THIS JOB!

  ci-success:
    name: ci
    if: github.event_name == 'push' && success()
    needs:
      - style
      - check
      - checkexamples
      - checkmacros
      - testv7
      - testv6
      - docs
      - mdbook
    runs-on: ubuntu-20.04
    steps:
      - name: Mark the job as a success
        run: exit 0
  ci-failure:
    name: ci
    if: github.event_name == 'push' && !success()
    needs:
      - style
      - check
      - checkexamples
      - checkmacros
      - testv7
      - testv6
      - docs
      - mdbook
    runs-on: ubuntu-20.04
    steps:
      - name: Mark the job as a failure
        run: exit 1