lib/shellwords.rb

DEFINITIONS

   1  # shellwords.rb
   2  # original is shellwords.pl
   3  #
   4  # Usage:
   5  #       require 'shellwords'
   6  #       words = Shellwords.shellwords(line)
   7  #
   8  #          or
   9  #
  10  #       require 'shellwords'
  11  #       include Shellwords
  12  #       words = shellwords(line)
  13  
  14  module Shellwords
  15    def shellwords(line)
  16      unless line.kind_of?(String)
  17        raise ArgumentError, "Argument must be String class object."
  18      end
  19      line = line.sub(/\A\s+/, '')
  20      words = []
  21      while line != ''
  22        field = ''
  23        while true
  24          if line.sub!(/\A"(([^"\\]|\\.)*)"/, '') then #"
  25            snippet = $1
  26            snippet.gsub!(/\\(.)/, '\1')
  27          elsif line =~ /\A"/ then #"
  28            raise ArgumentError, "Unmatched double quote: #{line}"
  29          elsif line.sub!(/\A'(([^'\\]|\\.)*)'/, '') then #'
  30            snippet = $1
  31            snippet.gsub!(/\\(.)/, '\1')
  32          elsif line =~ /\A'/ then #'
  33            raise ArgumentError, "Unmatched single quote: #{line}"
  34          elsif line.sub!(/\A\\(.)/, '') then
  35            snippet = $1
  36          elsif line.sub!(/\A([^\s\\'"]+)/, '') then #'
  37            snippet = $1
  38          else
  39            line.sub!(/\A\s+/, '')
  40            break
  41          end
  42          field.concat(snippet)
  43        end
  44        words.push(field)
  45      end
  46      words
  47    end
  48    module_function :shellwords
  49  end