name: "Compile and Bundle Circuit"
description: "Compiles and bundles the witness generator of a Circom Circuit"
branding:
  icon: "package"
  color: "blue"

inputs:
  circuit-name-display:
    description: "The name of the Circom circuit to compile."
    required: true
  circuit-name-binary:
    description: "The final name of the compiled binary. The name should be extensionless."
    required: true
  circuit-path:
    description: "The path to the Circom circuit file relative to the repository root."
    required: true
  resources-path:
    description: "The path to the CI resources directory relative to the repository root."
    required: false
    default: ".github/resources"
  version:
    description: "The version of the bundle. E.g.: v1.0.0."
    required: true
  os:
    description: "The target operating system for the bundle (linux, windows, macos)."
    required: true
  arch:
    description: "The target architecture for the bundle (x86_64, aarch64)."
    required: true

runs:
  using: "composite"
  steps:
    - name: Parse Circuit Path
      id: parse-circuit-path
      shell: bash
      env:
        CIRCUIT_PATH: ${{ inputs.circuit-path }}
        BUNDLE_TRIPLET: ${{ inputs.version }}-${{ inputs.os }}-${{ inputs.arch }}
        CIRCUIT_NAME_BINARY: ${{ inputs.circuit-name-binary }}
        RESOURCES_PATH: ${{ inputs.resources-path }}
        OS: ${{ inputs.os }}
      run: |
        CIRCUIT_DIRECTORY="$(dirname ${CIRCUIT_PATH})"
        CIRCUIT_FILENAME="$(basename ${CIRCUIT_PATH})"
        CIRCUIT_FILESTEM="${CIRCUIT_FILENAME%.circom}"
        CIRCUIT_CPP_DIRNAME="${CIRCUIT_FILESTEM}_cpp"
        
        compiled_binary_name="${CIRCUIT_FILESTEM}"
        if [ "${OS}" = "windows" ]; then
          compiled_binary_name="${compiled_binary_name}.exe"
        fi

        {
          echo "CIRCUIT_DIRECTORY=${CIRCUIT_DIRECTORY}"
          echo "CIRCUIT_FILENAME=${CIRCUIT_FILENAME}"
          echo "CIRCUIT_FILESTEM=${CIRCUIT_FILESTEM}"
          echo "CIRCUIT_CPP_DIRNAME=${CIRCUIT_CPP_DIRNAME}"
          echo "CIRCUIT_CPP_PATH=${CIRCUIT_DIRECTORY}/${CIRCUIT_CPP_DIRNAME}"
          echo "WITNESS_GENERATOR_RESOURCES_PATH=${RESOURCES_PATH}/witness-generator"
          echo "BUNDLE_TRIPLET=${BUNDLE_TRIPLET}"
          echo "COMPILED_BINARY_NAME=${compiled_binary_name}"
        } >> "${GITHUB_OUTPUT}"

    - name: Generate ${{ inputs.circuit-name-display }}
      shell: bash
      working-directory: ${{ steps.parse-circuit-path.outputs.CIRCUIT_DIRECTORY }}
      env:
        CIRCUIT_FILENAME: ${{ steps.parse-circuit-path.outputs.CIRCUIT_FILENAME }}
      run: circom --c --r1cs --no_asm --O2 "${CIRCUIT_FILENAME}"

    # TODO: Instead of replace, make a fork that generates the appropriate Makefile
    - name: Replace ${{ inputs.circuit-name-display }}'s Makefile
      shell: bash
      env:
        WITNESS_GENERATOR_RESOURCES_PATH: ${{ steps.parse-circuit-path.outputs.WITNESS_GENERATOR_RESOURCES_PATH }}
        CIRCUIT_CPP_PATH: ${{ steps.parse-circuit-path.outputs.CIRCUIT_CPP_PATH }}
      run: cp "${WITNESS_GENERATOR_RESOURCES_PATH}/Makefile" "${CIRCUIT_CPP_PATH}/Makefile"

    # TODO: Instead of insertion, make a fork that includes the appropriate patch (or the actual fix)
    - name: Patch MacOS GMP
      shell: bash
      if: ${{ inputs.os == 'macos' }}
      env:
        WITNESS_GENERATOR_RESOURCES_PATH: ${{ steps.parse-circuit-path.outputs.WITNESS_GENERATOR_RESOURCES_PATH }}
        CIRCUIT_CPP_PATH: ${{ steps.parse-circuit-path.outputs.CIRCUIT_CPP_PATH }}
        OS: ${{ inputs.os }}
      run: cp "${WITNESS_GENERATOR_RESOURCES_PATH}/${{ env.OS }}.gmp_patch.hpp" "${CIRCUIT_CPP_PATH}/gmp_patch.hpp"

    - name: Compile ${{ inputs.circuit-name-display }}
      if: ${{ inputs.os != 'windows' }}
      shell: bash
      working-directory: ${{ steps.parse-circuit-path.outputs.CIRCUIT_CPP_PATH }}
      env:
        CIRCUIT_FILESTEM: ${{ steps.parse-circuit-path.outputs.CIRCUIT_FILESTEM }}
        OS: ${{ inputs.os }}
      run: make PROJECT="${CIRCUIT_FILESTEM}" "${OS}"

    - name: Compile ${{ inputs.circuit-name-display }}
      if: ${{ inputs.os == 'windows' }}
      shell: msys2 {0}
      working-directory: ${{ steps.parse-circuit-path.outputs.CIRCUIT_CPP_PATH }}
      env:
        CIRCUIT_FILESTEM: ${{ steps.parse-circuit-path.outputs.CIRCUIT_FILESTEM }}
        OS: ${{ inputs.os }}
      run: make PROJECT="${CIRCUIT_FILESTEM}" "${OS}"

    - name: Upload ${{ inputs.circuit-name-display }}
      uses: actions/upload-artifact@de65e23aa2b7e23d713bb51fbfcb6d502f8667d8
      with:
        name: ${{ inputs.circuit-name-binary }}-${{ inputs.version }}-${{ inputs.os }}-${{ inputs.arch }}
        path: |
          ${{ steps.parse-circuit-path.outputs.CIRCUIT_CPP_PATH }}/${{ steps.parse-circuit-path.outputs.COMPILED_BINARY_NAME }}
          ${{ steps.parse-circuit-path.outputs.CIRCUIT_CPP_PATH }}/${{ steps.parse-circuit-path.outputs.CIRCUIT_FILESTEM }}.dat