pre-compile_llvm.yml

name: Pre-compile llvm

on:
  workflow_dispatch:
  push:
    branches: [ release_100, release_11x, release_12x, release_13x]

jobs:
  build:
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        target: [X86]
        cc: [clang, gcc]
        version: [10, 11]
            
    steps:
      - if: matrix.cc == 'clang'
        run: |
          echo "cpp=clang++" >> $GITHUB_ENV
          sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
          sudo touch /etc/apt/sources.list.d/llvm.list
          echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main' | sudo tee -a /etc/apt/sources.list.d/llvm.list
          echo 'deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-11 main'  | sudo tee -a /etc/apt/sources.list.d/llvm.list
          wget -q -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
          sudo apt update
          sudo apt install -f -y llvm-${{ matrix.version }} clang-${{ matrix.version}}

      - if: matrix.cc == 'gcc' && matrix.version == '10'
        run: |
          echo "cpp=g++" >> $GITHUB_ENV
          sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
          sudo apt install gcc-10 g++-10
        
      - if: matrix.cc == 'gcc' && matrix.version == '11'
        run: |
          echo "cpp=g++" >> $GITHUB_ENV
          sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
          sudo apt install gcc-11 g++-11

      - name: Check tools
        run: |
          git --version
          cmake --version
          make --version
          ${{ matrix.cc }}-${{ matrix.version }} --version
          ${{env.cpp}}-${{ matrix.version }} --version

      - name: Extract branch name
        run: echo "::set-output name=branch::${GITHUB_REF#refs/heads/}"
        id: extract_branch
      
      - name: Build llvm
        run: |
          # exit the llvm dir, so the path is the same on subsequent projects
          cd ../..
          rm -rf classic-flang-llvm-project
          # clone manually, because checkout does not allow exiting llvm dir
          git clone --depth 1 --single-branch --branch ${{ steps.extract_branch.outputs.branch }} https://github.com/flang-compiler/classic-flang-llvm-project.git
          cd classic-flang-llvm-project
          # After build place the artifacts in classic-flang-llvm-project/classic-flang-llvm-project, so Upload can find them.
          mkdir classic-flang-llvm-project
          ./build-llvm-project.sh \
            -t ${{ matrix.target }} \
            -p /usr/local \
            -a /usr/bin/${{ matrix.cc }}-${{ matrix.version }} \
            -b /usr/bin/${{env.cpp}}-${{ matrix.version }} \
            -n $(nproc)
          # Archive the source + build directories for future installation
          cd ..
          tar -zcf llvm_build.tar.gz classic-flang-llvm-project
          # Upload will only look in $GITHUB_WORKSPACE or its subdirs.
          mv llvm_build.tar.gz classic-flang-llvm-project/classic-flang-llvm-project/.
      
      - name: Upload llvm
        uses: actions/upload-artifact@v2
        with:
          name: llvm_build_${{ matrix.target }}_${{ matrix.cc }}_${{ matrix.version }}_${{ steps.extract_branch.outputs.branch }}
          path: llvm_build.tar.gz