Class: Masticate::Cook

Inherits:
Base
  • Object
show all
Defined in:
lib/masticate/cook.rb

Instance Attribute Summary

Attributes inherited from Base

#csv_options, #filename, #input, #input_count, #output, #output_count

Instance Method Summary collapse

Methods inherited from Base

#emit, #execute, #get, #standard_options, #with_input

Constructor Details

#initialize(filename) ⇒ Cook

Returns a new instance of Cook.



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# File 'lib/masticate/cook.rb', line 10

def initialize(filename)
  @filename = filename
end

Instance Method Details

#cook(opts) ⇒ Object 



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# File 'lib/masticate/cook.rb', line 14

def cook(opts)
  standard_options(opts)

  recipefile = opts[:recipe] or raise "missing recipe for cook"
  recipe = File.read(recipefile).lines
  standard_options(opts)

  # ignore blank lines in recipe file
  steps = recipe.grep(/\S/).map do |step|
    argv = Shellwords.split(step)
    masticator = Masticate::MyOptionParser.new
    command, options = masticator.parse(argv)
    masticator.prepare(command, options)
  end

  @output_count = 0
  headers = nil
  with_input do |input|
    while line = get
      row = CSV.parse_line(line, csv_options)

      steps.each do |step|
        if row
          if step.class == Masticate::Mender
            row = step.crunch(row, line, csv_options)
          else
            row = step.crunch(row)
          end
        end
      end

      emit(row) if row
    end
  end
  more_rows = []
  steps.each do |step|
    if more_rows.any?
      more_rows = more_rows.map {|row| step.crunch(row)}
    else
      step.crunch(nil) {|row| more_rows << row}
    end
  end
  more_rows.each {|row| emit(row)}

  @output.close if opts[:output]

  {
    :input_count => @input_count,
    :output_count => @output_count
  }
end