llvm-capstone/.github/workflows/LLVM-Auto-Updater.yml

name: Weekly-LLVM-Release-Update
on:
  workflow_dispatch:
    inputs:
      tag_name:
        description: "LLVM Version"
        required: false
  schedule:
    - cron: "0 0 * * 1"

permissions:
  contents: write

jobs:
  merge-llvm:
    runs-on: ubuntu-latest
    outputs:
      branch_version: ${{ steps.step1.outputs.branch_version }}
    steps:
    - name: Get LLVM version
      id: step1
      run: |
        if [[ -z $github_event_inputs_tag_name ]]; then
          tag_name=$(curl -sL https://api.github.com/repos/llvm/llvm-project/releases/latest | jq -r '.tag_name')
        else
          tag_name=$github.event.inputs.tag_name
        fi

        echo "Using version: $tag_name"       
        echo "tag_name=${tag_name}" >> $GITHUB_ENV
        version=$(echo $tag_name | grep -o '[0-9]\+\.[0-9]\+\.[0-9]\+')
        echo "version=${version}" >> $GITHUB_ENV
        major_version=$(echo $version | awk -F '.' '{print $1}')
        echo "major_version=${major_version}" >> $GITHUB_ENV
        branch_version='release/'$major_version'.x'
        echo "branch_version=${branch_version}" >> $GITHUB_ENV
        is_official_release=$(curl -sL https://api.github.com/repos/llvm/llvm-project/releases/latest | jq -r '.prerelease')
        echo "is_official_release=${is_official_release}" >> $GITHUB_ENV
        echo "branch_version=${branch_version}" >> $GITHUB_OUTPUT

    - name: Ensure official release
      run: |
        if [[ "${{ env.is_official_release }}" != "false" ]]; then
          exit 0
        fi

    - name: Checkout LLVM-project
      uses: actions/checkout@v3
      with:
        fetch-depth: 1

    - name: Sparse checkout LLVM-project
      run: |
        git clone --depth 1 --filter=blob:none --sparse --branch ${{ env.branch_version }} https://github.com/llvm/llvm-project.git ../llvm-project
        git config --local user.email "github-actions[bot]@users.noreply.github.com"
        git config --local user.name "github-actions[bot]"
        cd ../llvm-project
        echo "sparse checkout"
        git sparse-checkout set llvm/ cmake/ third-party/
        rm -rf .git/ .github/
        ls -la
        cd -

    - name: Add files to branch ${{ env.branch_version }}
      run: |
        branch_exists=$(git ls-remote --exit-code --heads origin ${{env.branch_version}})
        echo "branch_exists=${branch_exists}" >> $GITHUB_ENV
        git checkout ${{ env.branch_version }} 2>/dev/null || git checkout -b ${{ env.branch_version }}
        if [[ "${{ env.branch_exists }}" = true ]]; then
          git pull origin ${{ env.branch_version }}
          git push -u origin ${{ env.branch_version }}
          rm -rf !\(.git\|.github\)
        fi
        cp -r ../llvm-project/* .
        ls -la
        git add .

    - name: Update branch ${{ env.branch_version }}
      if: ${{ env.branch_exists }}
      run: |
        echo "Branch already exists, update."
        if [[ `git status --porcelain` ]]; then
          git commit -m "Update LLVM ${{ env.branch_version }}"
        else
          echo "No changes to commit."
          exit 0
        fi

    - name: Commit new branch ${{ env.branch_version }}
      if: ${{ ! env.branch_exists }}
      run: |
        git commit -m "Add LLVM ${{ env.branch_version }}"

    - name: Push new branch
      run: |
        git push origin ${{ env.branch_version }} -f

  build-llvm-tblgen:
    runs-on: ubuntu-latest
    needs: merge-llvm
    env:
      branch_version: ${{ needs.merge-llvm.outputs.branch_version }}
    steps:
      - uses: lukka/get-cmake@latest
      
      - name: Checkout llvm-capstone
        uses: actions/checkout@v3
        with:
          ref: ${{ env.branch_version }}

      - name: Build llvm tblgen
        run: |
          mkdir build
          cd build
          cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug ../llvm
          cmake --build . --target llvm-tblgen --config Debug