class ActiveStorage::Transformers::ImageProcessingTransformer

# File lib/active_storage/transformers/image_processing_transformer.rb, line 28
def operations
  transformations.each_with_object([]) do |(name, argument), list|
    validate_transformation(name, argument)

    if argument.present?
      list << [ name, argument ]
    end
  end
end

# File lib/active_storage/transformers/image_processing_transformer.rb, line 19
def process(file, format:)
  processor.
    source(file).
    loader(page: 0).
    convert(format).
    apply(operations).
    call
end

# File lib/active_storage/transformers/image_processing_transformer.rb, line 38
        def validate_transformation(name, argument)
          if name.to_s == "combine_options"
            raise ArgumentError, <<~ERROR.squish
              Active Storage's ImageProcessing transformer doesn't support :combine_options,
              as it always generates a single command.
            ERROR
          end
        end