name: Install Nim
inputs:
  os:
    description: "Operating system to build for"
    required: true
  cpu:
    description: "CPU to build for"
    default: "amd64"
  nim_ref:
    description: "Nim version"
    default: "v2.2.6"
  shell:
    description: "Shell to run commands in"
    default: "bash --noprofile --norc -e -o pipefail"

runs:
  using: "composite"
  steps:
    - name: Derive environment variables
      shell: ${{ inputs.shell }}
      run: |
        if [[ '${{ inputs.cpu }}' == 'amd64' ]]; then
          PLATFORM=x64
        elif [[ '${{ inputs.cpu }}' == 'arm64' ]]; then
          PLATFORM=arm64
        else
          PLATFORM=x86
        fi
        echo "PLATFORM=$PLATFORM" >> $GITHUB_ENV

        ncpu=
        MAKE_CMD="make"
        case '${{ inputs.os }}' in
        'Linux')
          ncpu=$(nproc)
          ;;
        'macOS')
          ncpu=$(sysctl -n hw.ncpu)
          ;;
        'Windows')
          ncpu=$NUMBER_OF_PROCESSORS
          MAKE_CMD="mingw32-make"
          ;;
        esac
        [[ -z "$ncpu" || $ncpu -le 0 ]] && ncpu=1
        echo "ncpu=$ncpu" >> $GITHUB_ENV
        echo "MAKE_CMD=${MAKE_CMD}" >> $GITHUB_ENV
        echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH

    - name: Restore Nim from cache
      id: nim-cache
      uses: actions/cache@v4
      with:
        path: '${{ github.workspace }}/nim'
        key: ${{ inputs.os }}-${{ inputs.cpu }}-nim-${{ inputs.nim_ref }}

    - name: Build Nim and Nimble
      shell: ${{ inputs.shell }}
      if: ${{ steps.nim-cache.outputs.cache-hit != 'true' }}
      run: |
        rm -rf nim
        curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
        env MAKE="${MAKE_CMD} -j${ncpu}" ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ inputs.nim_ref }} \
          QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=gcc \
          bash build_nim.sh nim csources dist/nimble NimBinaries