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

env:
  CARGO_TERM_COLOR: always

jobs:
  # Run cargo fmt --check, includes macros/
  style:
    name: style
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs


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

  # Compilation check
  check:
    name: check
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        target:
          - thumbv7m-none-eabi
          - thumbv6m-none-eabi
          - x86_64-unknown-linux-gnu
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install Rust ${{ matrix.toolchain }}
        run: |
          rustup set profile minimal
          rustup override set ${{ matrix.toolchain }}

      - name: Configure Rust target (${{ matrix.target }})
        run: rustup target add ${{ matrix.target }}

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

      - name: cargo check
        run: cargo check --target=${{ matrix.target }}

  # Clippy
  clippy:
    name: Cargo clippy
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - name: Add Rust component clippy
        run: rustup component add clippy

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

      - name: cargo clippy
        run: cargo clippy

  # Verify all examples, checks
  checkexamples:
    name: checkexamples
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        target:
          - thumbv7m-none-eabi
          - thumbv6m-none-eabi
          - thumbv8m.base-none-eabi
          - thumbv8m.main-none-eabi
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install Rust ${{ matrix.toolchain }}
        run: |
          rustup set profile minimal
          rustup override set ${{ matrix.toolchain }}

      - name: Configure Rust target (${{ matrix.target }})
        run: rustup target add ${{ matrix.target }}

      - name: Add Rust component llvm-tools-preview
        run: rustup component add llvm-tools-preview

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

      - name: Check the examples
        run: cargo check --examples --target=${{ matrix.target }}

  # Verify the example output with run-pass tests
  testexamples:
    name: testexamples
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        target:
          - thumbv7m-none-eabi
          - thumbv6m-none-eabi
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install Rust ${{ matrix.toolchain }}
        run: |
          rustup set profile minimal
          rustup override set ${{ matrix.toolchain }}

      - name: Configure Rust target (${{ matrix.target }})
        run: rustup target add ${{ matrix.target }}

      - name: Add Rust component llvm-tools-preview
        run: rustup component add llvm-tools-preview

      # Use precompiled binutils
      - name: cargo install cargo-binutils
        run: cargo install cargo-binutils

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

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

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - name: Run-pass tests
        run: cargo xtask --target ${{ matrix.target }}

  # Check the correctness of macros/ crate
  checkmacros:
    name: checkmacros
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        target:
          - x86_64-unknown-linux-gnu
        toolchain:
          - stable
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install Rust ${{ matrix.toolchain }}
        run: |
          rustup set profile minimal
          rustup override set ${{ matrix.toolchain }}

      - name: Configure Rust target (${{ matrix.target }})
        run: rustup target add ${{ matrix.target }}

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - name: cargo check
        run: cargo check --manifest-path macros/Cargo.toml --target=${{ matrix.target }}

  # Run the  macros test-suite
  testmacros:
    name: testmacros
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - name: cargo check
        run: cargo test --manifest-path macros/Cargo.toml

  # Run test suite
  tests:
    name: tests
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Cache Dependencies
        uses: Swatinem/rust-cache@v2

      - name: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - name: Run cargo test
        run: cargo test --test tests

  # Build documentation, check links
  docs:
    name: docs
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Cache pip installed linkchecker
        uses: actions/cache@v3
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Set up Python 3.x
        uses: actions/setup-python@v4
        with:
        # Semantic version range syntax or exact version of a Python version
          python-version: '3.x'

      # 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: Fail on warnings
        run: sed -i 's,//deny_warnings_placeholder_for_ci,#![deny(warnings)],' src/lib.rs macros/src/lib.rs

      - 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-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Set up Python 3.x
        uses: actions/setup-python@v4
        with:
        # Semantic version range syntax or exact version of a Python version
          python-version: '3.x'

      # 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
        with:
          mdbook-version: 'latest'

      - name: Build book in English
        shell: 'script --return --quiet --command "bash {0}"'
        run: cd book/en && if mdbook build |& tee /dev/tty | grep "\[ERROR\]"; then exit 1; else exit 0; fi

      - name: Build book in Russian
        shell: 'script --return --quiet --command "bash {0}"'
        run: cd book/ru && if mdbook build |& tee /dev/tty | grep "\[ERROR\]"; then echo "Russian book needs updating!"; else exit 0; fi

      - 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/

  # Update stable branch
  #
  # This needs to run before book is built
  mergetostablebranch:
    name: If CI passes, merge master branch into release/vX
    runs-on: ubuntu-22.04
    needs:
      - style
      - check
      - clippy
      - checkexamples
      - testexamples
      - checkmacros
      - testmacros
      - tests
      - docs
      - mdbook

    # Only run this when pushing to master branch
    if: github.ref == 'refs/heads/master'
    steps:
      - uses: actions/checkout@v3

      - name: Get crate version and print output branch release/vX
        id: crateversionbranch
        # Parse metadata for version number, extract the Semver Major
        run: |
          VERSION=$(cargo metadata --format-version 1 --no-deps --offline | jq -r '.packages[] | select(.name =="cortex-m-rtic") | .version')
          VERSIONMAJOR=${VERSION%.*.*}
          echo "branch=release/v$VERSIONMAJOR" >> $GITHUB_ENV
          echo "versionmajor=$VERSIONMAJOR" >> $GITHUB_ENV
          echo "version=$VERSION" >> $GITHUB_ENV

      - uses: everlytic/branch-merge@1.1.2
        with:
          github_token: ${{ github.token }}
          source_ref: 'master'
          target_branch: ${{ env.branch }}
          commit_message_template: '[Bors] Merged {source_ref} into target {target_branch}'

  # Only runs when pushing to master branch
  # Bors run CI against staging branch,
  # if that succeeds Borst tries against master branch
  # If all tests pass, then deploy stage is run
  deploy:
    name: deploy
    runs-on: ubuntu-22.04
    needs:
      mergetostablebranch

    # Only run this when pushing to master branch
    if: github.ref == 'refs/heads/master'
    steps:
      - uses: actions/checkout@v3

      - name: Set up Python 3.x
        uses: actions/setup-python@v4
        with:
        # Semantic version range syntax or exact version of a Python version
          python-version: '3.x'

      # 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
        with:
          mdbook-version: 'latest'

      - name: Get crate version
        id: crateversion
        # Parse metadata for version number, extract the Semver Major
        run: |
          VERSION=$(cargo metadata --format-version 1 --no-deps --offline | jq -r '.packages[] | select(.name =="cortex-m-rtic") | .version')
          VERSIONMAJOR=${VERSION%.*.*}
          echo "branch=release/v$VERSIONMAJOR" >> $GITHUB_ENV
          echo "versionmajor=$VERSIONMAJOR" >> $GITHUB_ENV
          echo "version=$VERSION" >> $GITHUB_ENV

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

      - name: Build docs
        run: cargo doc

      - name: Build books
        shell: 'script --return --quiet --command "bash {0}"'
        run: |
          langs=( en ru )
          devver=( dev )
          # The latest stable must be the first element in the array
          vers=( "1" "0.5" "0.4"  )

          # All releases start with "v"
          # followed by MAJOR.MINOR.PATCH, see semver.org
          # Store first in array as stable
          stable=${vers}
          crateversion={{ env.versionmajor }}

          echo "Latest stable version: $stable"
          echo "Current crate version: $crateversion"

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

          # Redirect rtic.rs/meeting/index.html to hackmd
          mkdir $td/meeting
          sed "s|URL|https://hackmd.io/c_mFUZL-Q2C6614MlrrxOg|g" redirect.html > $td/meeting/index.html
          sed -i "s|Page Redirection|RTIC Meeting|" $td/meeting/index.html
          sed -i "s|If you|Redirecting to RTIC HackMD. If you|" $td/meeting/index.html

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

          # Create the redirects for dev-version
          # If the current stable and the version being built differ,
          # then there is a dev-version and the links should point to it.
          if [[ "$stable" != "$crateversion" ]];
          then
            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
          else
            # If the current stable and the "dev" version in master branch
            # share the same major version, redirect dev/ to stable book
            sed 's|URL|rtic.rs/$stable/api/rtic|g' redirect.html > $td/$devver/api/index.html
            sed 's|URL|rtic.rs/$stable|g' redirect.html > $td/$devver/index.html
          fi

          # Build books
          for lang in ${langs[@]}; do
              ( cd book/$lang &&
                if mdbook build |& tee /dev/tty | grep "\[ERROR\]"; then exit 1; else exit 0; fi
              )
              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=$(mktemp -d)
              curl -L https://github.com/rtic-rs/cortex-m-rtic/archive/release/v${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 &&
                    if mdbook build |& tee /dev/tty | grep "\[ERROR\]"; then exit 1; else exit 0; fi
                  )
                  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
          force_orphan: true

  # 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
      - clippy
      - checkexamples
      - testexamples
      - checkmacros
      - testmacros
      - tests
      - docs
      - mdbook
    runs-on: ubuntu-22.04
    steps:
      - name: Mark the job as a success
        run: exit 0