action.yml

name: "Setup LLGO Dependencies"
description: "Install all required dependencies for LLGO"
inputs:
  llvm-version:
    description: "LLVM version to install"
    required: true
    default: "19"
  install-llvm:
    description: "Whether to install LLVM"
    required: false
    default: "true"

runs:
  using: "composite"
  steps:
    - name: Install macOS dependencies
      if: runner.os == 'macOS'
      shell: bash
      env:
        HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: 1
      run: |
        brew update
        
        # Install LLVM if requested
        if [[ "${{ inputs.install-llvm }}" == "true" ]]; then
          llvm_formula="llvm@${{inputs.llvm-version}}"
          lld_formula="lld@${{inputs.llvm-version}}"

          # GitHub macOS runners may pre-link another LLVM/LLD version (for example llvm@18),
          # which makes lld@<target> fail during Homebrew's automatic link step.
          while IFS= read -r formula; do
            case "${formula}" in
              llvm|llvm@*|lld|lld@*)
                if [[ "${formula}" != "${llvm_formula}" && "${formula}" != "${lld_formula}" ]]; then
                  brew unlink "${formula}" || true
                fi
                ;;
            esac
          done < <(brew list --formula)

          brew install "${llvm_formula}" "${lld_formula}"
          brew link --force --overwrite "${llvm_formula}" "${lld_formula}"
          llvm_bin="$(brew --prefix "${llvm_formula}")/bin"
          lld_bin="$(brew --prefix "${lld_formula}")/bin"
          echo "${llvm_bin}" >> "$GITHUB_PATH"

          # Print resolved toolchain versions for CI diagnostics.
          echo "LLVM/LLD versions:"
          brew list --versions "${llvm_formula}" "${lld_formula}"
          clang_version="$("${llvm_bin}/clang" --version | head -n 1)"
          lld_version="$("${lld_bin}/ld.lld" --version | head -n 1)"
          echo "clang: ${clang_version}"
          echo "ld.lld: ${lld_version}"
          echo "linked ld.lld path: $(command -v ld.lld || true)"
        fi
        
        # Install common dependencies
        brew install bdw-gc openssl libffi libuv
        brew link --overwrite libffi

        # Install optional deps for demos.
        #
        # NOTE: Keep this list updated as new deps are introduced.
        opt_deps=(
          cjson       # for github.com/goplus/lib/c/cjson
          sqlite      # for github.com/goplus/lib/c/sqlite
        )
        brew install "${opt_deps[@]}"
        
        brew install python@3.12 || true # for github.com/goplus/lib/py
        brew link --overwrite python@3.12

    - name: Install Ubuntu dependencies
      if: runner.os == 'Linux'
      shell: bash
      run: |
        # Install LLVM if requested
        if [[ "${{ inputs.install-llvm }}" == "true" ]]; then
          echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-${{inputs.llvm-version}} main" | sudo tee /etc/apt/sources.list.d/llvm.list
          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
          sudo apt-get update
          sudo apt-get install -y llvm-${{inputs.llvm-version}}-dev clang-${{inputs.llvm-version}} libclang-${{inputs.llvm-version}}-dev lld-${{inputs.llvm-version}} libunwind-${{inputs.llvm-version}}-dev libc++-${{inputs.llvm-version}}-dev
          echo "PATH=/usr/lib/llvm-${{inputs.llvm-version}}/bin:$PATH" >> $GITHUB_ENV
        else
          sudo apt-get update
        fi
        
        # Install common dependencies
        sudo apt-get install -y pkg-config libgc-dev libssl-dev zlib1g-dev libffi-dev libcjson-dev libuv1-dev

        # Install optional deps for demos.
        #
        # NOTE: Keep this list updated as new deps are introduced.
        opt_deps=(
          libcjson-dev   # for github.com/goplus/lib/c/cjson
          libsqlite3-dev # for github.com/goplus/lib/c/sqlite
          python3.12-dev # for github.com/goplus/lib/py
        )
        sudo apt-get install -y "${opt_deps[@]}"