name: Update Boost Version
on:
  workflow_dispatch:
  schedule:
    - cron:  '0 10 * * *'
jobs:
  updateBoostVersion:
    if: ${{ github.repository == 'mlpack/mlpack' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Install Build Dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y --allow-unauthenticated libopenblas-dev liblapack-dev g++ libboost-all-dev libcereal-dev libstb-dev libensmallen-dev
          curl -L https://sourceforge.net/projects/arma/files/armadillo-9.800.6.tar.xz | tar -xvJ && cd armadillo*
          cmake . && make && sudo make install && cd .. && rm -r armadillo*

      - name: Get Latest Boost Tagged Release
        id: boost-version
        run: |
          # CMake for extracting present boost version.
          mkdir build && cd build
          cmake ..

          # Ping version information upstream.
          BOOST_RELEASE_JSON=$(curl -sL https://api.github.com/repos/boostorg/boost/tags)
          FOUND_NEW="NO"

          # Compare present and upstream boost version.
          for i in `jq -r .[].name <<< "$BOOST_RELEASE_JSON" | awk '!/.beta/' | \
              grep -Po "(\d+\.)+\d+"`
          do
            FOUND_SIMILAR="NO"
            for j in `grep Boost_ADDITIONAL_VERSIONS_LAST CMakeCache.txt | \
                cut -d "=" -f2 | sed "s/;/ /g"`
            do
              if [[ "$i" == "$j" ]];
              then
                FOUND_SIMILAR="YES"
                break
              fi
            done
            if [[ "$FOUND_SIMILAR" != "YES" ]];
            then
              FOUND_NEW="YES"
              BOOST_VERSION="$BOOST_VERSION\"$i\" "
            fi
            FOUND_SIMILAR="NO"
            for j in `grep Boost_ADDITIONAL_VERSIONS_LAST CMakeCache.txt | \
                cut -d "=" -f2 | sed "s/;/ /g"`
            do
              if [[ $(echo $i | grep -Po "(\d+)\.\d+") == "$j" ]];
              then
                FOUND_SIMILAR="YES"
                break
              fi
            done
            if [[ "$FOUND_SIMILAR" != "YES" ]];
            then
              FOUND_NEW="YES"
              BOOST_VERSION="$BOOST_VERSION\"$(echo $i | grep -Po "(\d+)\.\d+")\" "
            fi
          done

          # If found the new boost version, then update the CMake script.
          if [[ "$FOUND_NEW" == "YES" ]]
          then
            sed --in-place "s/set(Boost_ADDITIONAL_VERSIONS/set(Boost_ADDITIONAL_VERSIONS\n  ${BOOST_VERSION: : -1}/" ../CMakeLists.txt
          fi

      - name: Create Pull Request For Boost Version
        uses: peter-evans/create-pull-request@v3
        with:
          commit-message: Upgrade Boost Version in CMake script.
          title: Upgrade Boost Version in CMake script.
          body: |
            Updates [boostorg/boost](https://github.com/boostorg/boost) in CMake script.
            Auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request).
          labels: update dependencies, automated PR
          branch: boost-version-updates