module FileUtils

Constants

LN_SUPPORTED
RUBY

Path to the currently running Ruby program

Public Instance Methods

ruby(*args, &block) click to toggle source

Run a Ruby interpreter with the given arguments.

Example:

ruby %Q{-pe '$_.upcase!' <README}
# File lib/rake/file_utils.rb, line 102
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
safe_ln(*args) click to toggle source

Attempt to do a normal file link, but fall back to a copy if the link fails.

# File lib/rake/file_utils.rb, line 115
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
sh(*cmd, &block) click to toggle source

Run the system command cmd. If multiple arguments are given the command is run directly (without the shell, same semantics as Kernel::exec and Kernel::system).

It is recommended you use the multiple argument form over interpolating user input for both usability and security reasons. With the multiple argument form you can easily process files with spaces or other shell reserved characters in them. With the multiple argument form your rake tasks are not vulnerable to users providing an argument like ; rm # -rf /.

If a block is given, upon command completion the block is called with an OK flag (true on a zero exit status) and a Process::Status object. Without a block a RuntimeError is raised when the command exits non-zero.

Examples:

sh 'ls -ltr'

sh 'ls', 'file with spaces'

# check exit status after command runs
sh %Q{grep pattern file} do |ok, res|
  if ! ok
    puts "pattern not found (status = #{res.exitstatus})"
  end
end
# File lib/rake/file_utils.rb, line 45
def sh(*cmd, &block)
  options = (Hash === cmd.last) ? cmd.pop : {}
  shell_runner = block_given? ? block : create_shell_runner(cmd)

  set_verbose_option(options)
  verbose = options.delete :verbose
  noop    = options.delete(:noop) || Rake::FileUtilsExt.nowrite_flag

  Rake.rake_output_message sh_show_command cmd if verbose

  unless noop
    res = system(*cmd, options)
    status = $?
    status = Rake::PseudoStatus.new(1) if !res && status.nil?
    shell_runner.call(res, status)
  end
end
split_all(path) click to toggle source

Split a file path into individual directory names.

Example:

split_all("a/b/c") =>  ['a', 'b', 'c']
# File lib/rake/file_utils.rb, line 133
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