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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")
words = []
field = ''
last = 0
sep = nil
line.scan(/\G\s*(?:([^\s\\\'\"]+)|'([^\']*)'|"((?:[^\"\\]|\\.)*)"|(\\.?))(\s+|\z)?/m) do
last = $~.end(0)
sep = $~.begin(5)
field << ($1 || $2 || ($3 || $4).gsub(/\\(?=.)/, ''))
if sep
words << field
field = ''
end
end
raise ArgumentError, "Unmatched double quote: #{line}" if line[last]
words
end
module_function :shellwords
end
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