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#
# shellwords.rb: Split text into an array of tokens a la UNIX shell
#
#
# This module is originally a port of shellwords.pl, but modified to
# conform to POSIX / SUSv3 (IEEE Std 1003.1-2001).
#
# Examples:
#
# require 'shellwords'
# words = Shellwords.shellwords(line)
#
# or
#
# require 'shellwords'
# include Shellwords
# words = shellwords(line)
#
module Shellwords
#
# Split text into an array of tokens in the same way the UNIX Bourne
# shell does.
#
# See the +Shellwords+ module documentation for an example.
#
def shellwords(line)
line = String.new(line) rescue
raise(ArgumentError, "Argument must be a string")
line.lstrip!
words = []
until line.empty?
field = ''
loop do
if line.sub!(/\A"(([^"\\]|\\.)*)"/, '') then
snippet = $1.gsub(/\\(.)/, '\1')
elsif line =~ /\A"/ then
raise ArgumentError, "Unmatched double quote: #{line}"
elsif line.sub!(/\A'([^']*)'/, '') then
snippet = $1
elsif line =~ /\A'/ then
raise ArgumentError, "Unmatched single quote: #{line}"
elsif line.sub!(/\A\\(.)?/, '') then
snippet = $1 || '\\'
elsif line.sub!(/\A([^\s\\'"]+)/, '') then
snippet = $1
else
line.lstrip!
break
end
field.concat(snippet)
end
words.push(field)
end
words
end
module_function :shellwords
end
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