Class: Masticate::Base

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Base

Returns a new instance of Base.



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# File 'lib/masticate/base.rb', line 7

def initialize(args)
  case args
  when String, nil
    @filename = args
  when Hash
    configure(args)
  else
    raise "invalid initialization: #{args}"
  end
end

Instance Attribute Details

#csv_options ⇒ Object (readonly)

Returns the value of attribute csv_options.



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# File 'lib/masticate/base.rb', line 5

def csv_options
  @csv_options
end

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/masticate/base.rb', line 2

def filename
  @filename
end

#input ⇒ Object (readonly)

Returns the value of attribute input.



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# File 'lib/masticate/base.rb', line 3

def input
  @input
end

#input_count ⇒ Object (readonly)

Returns the value of attribute input_count.



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# File 'lib/masticate/base.rb', line 4

def input_count
  @input_count
end

#output ⇒ Object (readonly)

Returns the value of attribute output.



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# File 'lib/masticate/base.rb', line 3

def output
  @output
end

#output_count ⇒ Object (readonly)

Returns the value of attribute output_count.



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# File 'lib/masticate/base.rb', line 4

def output_count
  @output_count
end

Instance Method Details

#emit(line) ⇒ Object 



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# File 'lib/masticate/base.rb', line 38

def emit(line)
  @output_count ||= 0
  @output_count += 1
  begin
    case line
    when Array
      @output.puts line.to_csv
    else
      @output.puts line
    end
  rescue Errno::EPIPE
    # output was closed, e.g. ran piped into `head`
    # silently ignore this condition, it's not fatal and doesn't need a warning
  end
end

#execute(opts) ⇒ Object 



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# File 'lib/masticate/base.rb', line 63

def execute(opts)
  configure(opts)

  @output_count = 0
  with_input do |input|
    while line = get
      row = CSV.parse_line(line, csv_options) #.map {|s| s && s.strip}
      if row
        row = row.map {|s| s && s.strip}
      end
      if self.class == Masticate::Mender
        output = crunch(row, line, csv_options)
      else
        output = crunch(row)
      end
      emit(output) if output
    end
  end
  crunch(nil) {|row| emit(row)}
  @output.close if opts[:output]

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

#get ⇒ Object 



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# File 'lib/masticate/base.rb', line 26

def get
  line = @input.gets
  return nil if line.nil?
  line.chomp!
  if line.empty?
    get
  else
    @input_count += 1
    line
  end
end

#standard_options(opts) ⇒ Object 



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# File 'lib/masticate/base.rb', line 54

def standard_options(opts)
  @output = opts[:output] ? File.open(opts[:output], "w") : $stdout
  @csv_options = {}
  @csv_options[:col_sep] = opts[:col_sep] if opts[:col_sep]
  if opts[:col_sep]
    @csv_options[:quote_char] = opts[:quote_char] || "\0"
  end
end

#with_input ⇒ Object 



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# File 'lib/masticate/base.rb', line 18

def with_input
  @input = @filename ? open(@filename) : $stdin
  @input_count = 0
  result = yield @input
  @input.close if @filename
  result
end