Class: Ned::Cut

Inherits:
Command show all
Defined in:
lib/ned/commands/cut.rb

Instance Method Summary collapse

Methods inherited from Command

config, description, #execute, #execute_all, help, #initialize, #load_lines, long_name, option_parser, #options, #peek, require_all, #require_all, #require_all?, require_all?, short_name

Constructor Details

This class inherits a constructor from Ned::Command

Instance Method Details

#execute_internal(line) ⇒ Object 



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# File 'lib/ned/commands/cut.rb', line 66

def execute_internal(line)
  ending = line[-1] == "\n" ? line.slice!(-1) : ''

  columns = line.split(options[:pattern] || options[:delimiter])
  result = options[:ranges].flat_map do |range|
    columns[range]
  end.join(options[:join])

  result << ending

  @require_split ? result.split(/(?<=\n)/) : result
end

#parse(args) ⇒ Object

Raises:

  • (OptionParser::ParseError) 


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# File 'lib/ned/commands/cut.rb', line 51

def parse(args)
  super

  raise OptionParser::ParseError.new('specify only one of --delimiter and --pattern') if options[:delimiter] && options[:pattern]
  raise OptionParser::ParseError.new('you must specify one or more field indices or ranges') unless options[:ranges]

  if options[:delimiter]
    options[:join] ||= options[:delimiter]
  else
    options[:join] ||= ' '
  end

  @require_split = !!options[:join]&.index("\n")
end