Module: MadCat::Helpers::ClassMethods

Included in:
MadCat::Helpers
Defined in:
lib/madcat/helpers.rb

Instance Method Summary collapse

Instance Method Details

#exec!(argv, stdin = '') ⇒ Object

Run argv via Open4, optionally passing it stdin.

Parameters:

  • argv (Array) —

    Command

  • stdin (String) (defaults to: '') —

    Stdin data



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# File 'lib/madcat/helpers.rb', line 12

def exec!(argv, stdin='')
  stdout, stderr = '', ''
  status = Open4::spawn argv, {'quiet' => true, 'raise' => true, 'stdin' => stdin, 'stdout' => stdout, 'stderr' => stderr}
  Hashie::Mash.new({ :status => status.exitstatus, :stdin => stdin, :stdout => stdout, :stderr => stderr, :cmd => argv })
end

#stream_as_array(stream = STDIN, delim = "\t") ⇒ Object

Read stream line-wise, yield line.split(delim)

Parameters:

  • stream (IO) (defaults to: STDIN) —

    Stream to read from

  • delim (String) (defaults to: "\t") —

    Field delimiter



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# File 'lib/madcat/helpers.rb', line 22

def stream_as_array(stream=STDIN, delim="\t")
  stream.each do |line|
    yield line.split(delim)
  end
end

#yaml_preamble(text) ⇒ Object 



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# File 'lib/madcat/helpers.rb', line 31

def yaml_preamble(text)
  preamble_lines = []
  body_lines = []

  state = :before_preamble

  text.split("\n").each do |line|
    stripped = line.strip

    case state
      when :before_preamble
        new_state = case stripped
          when "---" 
            :preamble
          when "" 
            :before_preamble
          else 
            raise "First line must begin with ---"
        end

      when :preamble
        new_state = case stripped
          when "---" 
            :after_preamble
          else 
            preamble_lines << line
            :preamble
        end

      when :after_preamble
        new_state = :after_preamble
        body_lines << line

      else raise "Invalid State: #{ state }"
    end

    state = new_state
  end
  return [YAML::load(preamble_lines.join), body_lines.join]
end