Module: ShellEscape

Defined in:
lib/shell_escape.rb

Overview

Escape module provides several escape functions.

  • shell command

modified to work only with shell

Class Method Summary collapse

Class Method Details

.command(*args) ⇒ Object

Escape.shell_command composes a sequence of words to a single shell command line. All shell meta characters are quoted and the words are concatenated with interleaving space.



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# File 'lib/shell_escape.rb', line 38

def command(*args)
  args.map{ |arg| word(arg) } * ' '
end

.word(word) ⇒ Object

Escape.shell_single_word quotes shell meta characters.

The result string is always single shell word, even if the argument is “”.



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# File 'lib/shell_escape.rb', line 46

def word(word)
  word = word.to_s
  if word.empty?
    "''"
  elsif %r{\A[0-9A-Za-z+,./:=@_-]+\z} =~ word
    word
  else
    result = ''
    word.scan(/('+)|[^']+/) {
      if $1
        result << %q{\'} * $1.length
      else
        result << "'#{$&}'"
      end
    }
    result
  end
end