module FileUtils

def create_shell_runner(cmd) # :nodoc:

:nodoc: 
def create_shell_runner(cmd) # :nodoc:
  show_command = cmd.join(" ")
  show_command = show_command[0, 42] + "..." unless $trace
  lambda do |ok, status|
    ok or
      fail "Command failed with status (#{status.exitstatus}): " +
      "[#{show_command}]"
  end
end

def rake_system(*cmd) # :nodoc:

:nodoc: 
def rake_system(*cmd) # :nodoc:
  Rake::AltSystem.system(*cmd)
end

def ruby(*args, &block)


ruby %{-pe '$_.upcase!' Example:

Run a Ruby interpreter with the given arguments. 
def ruby(*args, &block)
  options = (Hash === args.last) ? args.pop : {}
  if args.length > 1
    sh(*([RUBY] + args + [options]), &block)
  else
    sh("#{RUBY} #{args.first}", options, &block)
  end
end

def safe_ln(*args)

fails.
Attempt to do a normal file link, but fall back to a copy if the link 
def safe_ln(*args)
  if ! LN_SUPPORTED[0]
    cp(*args)
  else
    begin
      ln(*args)
    rescue StandardError, NotImplementedError
      LN_SUPPORTED[0] = false
      cp(*args)
    end
  end
end

def set_verbose_option(options) # :nodoc:

:nodoc: 
def set_verbose_option(options) # :nodoc:
  unless options.key? :verbose
    options[:verbose] =
      (Rake::FileUtilsExt.verbose_flag == Rake::FileUtilsExt::DEFAULT) ||
      Rake::FileUtilsExt.verbose_flag
  end
end

def sh(*cmd, &block)


end
end
puts "pattern not found (status = #{res.exitstatus})"
if ! ok
sh %{grep pattern file} do |ok, res|
# check exit status after command runs

sh 'ls', 'file with spaces'

sh %{ls -ltr}
Example:

Kernel::system).
is not run with the shell (same semantics as Kernel::exec and
Run the system command +cmd+. If multiple arguments are given the command 
def sh(*cmd, &block)
  options = (Hash === cmd.last) ? cmd.pop : {}
  shell_runner = block_given? ? block : create_shell_runner(cmd)
  set_verbose_option(options)
  options[:noop] ||= Rake::FileUtilsExt.nowrite_flag
  Rake.rake_check_options options, :noop, :verbose
  Rake.rake_output_message cmd.join(" ") if options[:verbose]
  unless options[:noop]
    res = rake_system(*cmd)
    status = $?
    status = Rake::PseudoStatus.new(1) if !res && status.nil?
    shell_runner.call(res, status)
  end
end

def split_all(path)


split_all("a/b/c") => ['a', 'b', 'c']
Example:

Split a file path into individual directory names. 
def split_all(path)
  head, tail = File.split(path)
  return [tail] if head == '.' || tail == '/'
  return [head, tail] if head == '/'
  return split_all(head) + [tail]
end