name: compare
description: "Compare the output of a command to an expected value."
inputs:
  expected:
    description: "Expected output."
    required: false
  actual:
    description: "Actual output."
    required: true
  exitOnFail:
    description: "Should the program exit on a failure."
    required: true
    default: "true"
outputs:
  success:
    description: "The result of the comparison."
    value: ${{ steps.compare.outputs.success }}
runs:
  using: "composite"
  steps:
  - name: "Compare input and output"
    id: compare
    run: |
      EXPECTED=$(cat <<EOF
      ${{ inputs.expected }}
      EOF
      )
      ACTUAL=$(cat <<EOF
      ${{ inputs.actual }}
      EOF
      )

      if [[ "$EXPECTED" == "$ACTUAL" ]]; then
        echo "success=true" >> "$GITHUB_OUTPUT"
      else
        echo "success=false" >> "$GITHUB_OUTPUT"
        if [[ "${{ inputs.exitOnFail }}" == "true" ]]; then
          echo EXPECTED: "$EXPECTED"
          echo --------------------------------
          echo ACTUAL: "$ACTUAL"
          exit 1
        fi
      fi
    shell: bash