Module FileUtils
In: fileutils.rb

fileutils.rb

Copyright © 2000-2005 Minero Aoki <aamine@loveruby.net>

This program is free software. You can distribute/modify this program under the same terms of ruby.

module FileUtils

Namespace for several file utility methods for copying, moving, removing, etc.

Module Functions

  cd(dir, options)
  cd(dir, options) {|dir| .... }
  pwd()
  mkdir(dir, options)
  mkdir(list, options)
  mkdir_p(dir, options)
  mkdir_p(list, options)
  rmdir(dir, options)
  rmdir(list, options)
  ln(old, new, options)
  ln(list, destdir, options)
  ln_s(old, new, options)
  ln_s(list, destdir, options)
  ln_sf(src, dest, options)
  cp(src, dest, options)
  cp(list, dir, options)
  cp_r(src, dest, options)
  cp_r(list, dir, options)
  mv(src, dest, options)
  mv(list, dir, options)
  rm(list, options)
  rm_r(list, options)
  rm_rf(list, options)
  install(src, dest, mode = <src's>, options)
  chmod(mode, list, options)
  chmod_R(mode, list, options)
  chown(user, group, list, options)
  chown_R(user, group, list, options)
  touch(list, options)

The options parameter is a hash of options, taken from the list :force, :noop, :preserve, and :verbose. :noop means that no changes are made. The other two are obvious. Each method documents the options that it honours.

All methods that have the concept of a "source" file or directory can take either one file or a list of files in that argument. See the method documentation for examples.

There are some `low level’ methods, which do not accept any option:

  copy_entry(src, dest, preserve = false, dereference = false)
  copy_file(src, dest, preserve = false, dereference = true)
  copy_stream(srcstream, deststream)
  remove_entry(path, force = false)
  remove_entry_secure(path, force = false)
  remove_file(path, force = false)
  compare_file(path_a, path_b)
  compare_stream(stream_a, stream_b)
  uptodate?(file, cmp_list)

module FileUtils::Verbose

This module has all methods of FileUtils module, but it outputs messages before acting. This equates to passing the :verbose flag to methods in FileUtils.

module FileUtils::NoWrite

This module has all methods of FileUtils module, but never changes files/directories. This equates to passing the :noop flag to methods in FileUtils.

module FileUtils::DryRun

This module has all methods of FileUtils module, but never changes files/directories. This equates to passing the :noop and :verbose flags to methods in FileUtils.

Methods

cd   chdir   chmod   chmod_R   chown   chown_R   cmp   compare_file   compare_stream   copy   copy_entry   copy_file   copy_stream   cp   cp_r   fu_have_symlink?   fu_world_writable?   getwd   identical?   install   link   ln   ln_s   ln_sf   makedirs   mkdir   mkdir_p   mkpath   move   mv   pwd   remove   remove_dir   remove_entry   remove_entry_secure   remove_file   rm   rm_f   rm_r   rm_rf   rmdir   rmtree   safe_unlink   symlink   touch   uptodate?  

Included Modules

StreamUtils_

Classes and Modules

Module FileUtils::DryRun
Module FileUtils::NoWrite
Module FileUtils::StreamUtils_
Module FileUtils::Verbose

Constants

METHODS = singleton_methods() - ['private_module_function']

Public Instance methods

Options: verbose

Changes the current directory to the directory dir.

If this method is called with block, resumes to the old working directory after the block execution finished.

  FileUtils.cd('/', :verbose => true)   # chdir and report it

[Source]

# File fileutils.rb, line 118
  def cd(dir, options = {}, &block) # :yield: dir
    fu_check_options options, :verbose
    fu_output_message "cd #{dir}" if options[:verbose]
    Dir.chdir(dir, &block)
    fu_output_message 'cd -' if options[:verbose] and block
  end
chdir(dir, options = {})

Alias for cd

Options: noop verbose

Changes permission bits on the named files (in list) to the bit pattern represented by mode.

  FileUtils.chmod 0755, 'somecommand'
  FileUtils.chmod 0644, %w(my.rb your.rb his.rb her.rb)
  FileUtils.chmod 0755, '/usr/bin/ruby', :verbose => true

[Source]

# File fileutils.rb, line 853
  def chmod(mode, list, options = {})
    fu_check_options options, :noop, :verbose
    list = fu_list(list)
    fu_output_message sprintf('chmod %o %s', mode, list.join(' ')) if options[:verbose]
    return if options[:noop]
    list.each do |path|
      Entry_.new(path).chmod mode
    end
  end

Options: noop verbose force

Changes permission bits on the named files (in list) to the bit pattern represented by mode.

  FileUtils.chmod_R 0700, "/tmp/app.#{$$}"

[Source]

# File fileutils.rb, line 874
  def chmod_R(mode, list, options = {})
    fu_check_options options, :noop, :verbose, :force
    list = fu_list(list)
    fu_output_message sprintf('chmod -R%s %o %s',
                              (options[:force] ? 'f' : ''),
                              mode, list.join(' ')) if options[:verbose]
    return if options[:noop]
    list.each do |root|
      Entry_.new(root).traverse do |ent|
        begin
          ent.chmod mode
        rescue
          raise unless options[:force]
        end
      end
    end
  end

Options: noop verbose

Changes owner and group on the named files (in list) to the user user and the group group. user and group may be an ID (Integer/String) or a name (String). If user or group is nil, this method does not change the attribute.

  FileUtils.chown 'root', 'staff', '/usr/local/bin/ruby'
  FileUtils.chown nil, 'bin', Dir.glob('/usr/bin/*'), :verbose => true

[Source]

# File fileutils.rb, line 907
  def chown(user, group, list, options = {})
    fu_check_options options, :noop, :verbose
    list = fu_list(list)
    fu_output_message sprintf('chown %s%s',
                              [user,group].compact.join(':') + ' ',
                              list.join(' ')) if options[:verbose]
    return if options[:noop]
    uid = fu_get_uid(user)
    gid = fu_get_gid(group)
    list.each do |path|
      Entry_.new(path).chown uid, gid
    end
  end

Options: noop verbose force

Changes owner and group on the named files (in list) to the user user and the group group recursively. user and group may be an ID (Integer/String) or a name (String). If user or group is nil, this method does not change the attribute.

  FileUtils.chown_R 'www', 'www', '/var/www/htdocs'
  FileUtils.chown_R 'cvs', 'cvs', '/var/cvs', :verbose => true

[Source]

# File fileutils.rb, line 936
  def chown_R(user, group, list, options = {})
    fu_check_options options, :noop, :verbose, :force
    list = fu_list(list)
    fu_output_message sprintf('chown -R%s %s%s',
                              (options[:force] ? 'f' : ''),
                              [user,group].compact.join(':') + ' ',
                              list.join(' ')) if options[:verbose]
    return if options[:noop]
    uid = fu_get_uid(user)
    gid = fu_get_gid(group)
    return unless uid or gid
    list.each do |root|
      Entry_.new(root).traverse do |ent|
        begin
          ent.chown uid, gid
        rescue
          raise unless options[:force]
        end
      end
    end
  end
cmp(a, b)

Alias for compare_file

Returns true if the contents of a file A and a file B are identical.

  FileUtils.compare_file('somefile', 'somefile')  #=> true
  FileUtils.compare_file('/bin/cp', '/bin/mv')    #=> maybe false

[Source]

# File fileutils.rb, line 782
  def compare_file(a, b)
    return false unless File.size(a) == File.size(b)
    File.open(a, 'rb') {|fa|
      File.open(b, 'rb') {|fb|
        return compare_stream(fa, fb)
      }
    }
  end

Returns true if the contents of a stream a and b are identical.

[Source]

# File fileutils.rb, line 800
  def compare_stream(a, b)
    bsize = fu_stream_blksize(a, b)
    sa = sb = nil
    while sa == sb
      sa = a.read(bsize)
      sb = b.read(bsize)
      unless sa and sb
        if sa.nil? and sb.nil?
          return true
        end
      end
    end
    false
  end
copy(src, dest, options = {})

Alias for cp

Copies a file system entry src to dest. If src is a directory, this method copies its contents recursively. This method preserves file types, c.f. symlink, directory… (FIFO, device files and etc. are not supported yet)

Both of src and dest must be a path name. src must exist, dest must not exist.

If preserve is true, this method preserves owner, group, permissions and modified time.

If dereference_root is true, this method dereference tree root.

[Source]

# File fileutils.rb, line 444
  def copy_entry(src, dest, preserve = false, dereference_root = false)
    Entry_.new(src, nil, dereference_root).traverse do |ent|
      destent = Entry_.new(dest, ent.rel, false)
      ent.copy destent.path
      ent.copy_metadata destent.path if preserve
    end
  end

Copies file contents of src to dest. Both of src and dest must be a path name.

[Source]

# File fileutils.rb, line 457
  def copy_file(src, dest, preserve = false, dereference = true)
    ent = Entry_.new(src, nil, dereference)
    ent.copy_file dest
    ent.copy_metadata dest if preserve
  end

Copies stream src to dest. src must respond to read(n) and dest must respond to write(str).

[Source]

# File fileutils.rb, line 469
  def copy_stream(src, dest)
    fu_copy_stream0 src, dest, fu_stream_blksize(src, dest)
  end

Options: preserve noop verbose

Copies a file content src to dest. If dest is a directory, copies src to +dest/src+.

If src is a list of files, then dest must be a directory.

  FileUtils.cp 'eval.c', 'eval.c.org'
  FileUtils.cp %w(cgi.rb complex.rb date.rb), '/usr/lib/ruby/1.6'
  FileUtils.cp %w(cgi.rb complex.rb date.rb), '/usr/lib/ruby/1.6', :verbose => true
  FileUtils.cp 'symlink', 'dest'   # copy content, "dest" is not a symlink

[Source]

# File fileutils.rb, line 378
  def cp(src, dest, options = {})
    fu_check_options options, :preserve, :noop, :verbose
    fu_output_message "cp#{options[:preserve] ? ' -p' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
    return if options[:noop]
    fu_each_src_dest(src, dest) do |s, d|
      copy_file s, d, options[:preserve]
    end
  end

Options: preserve noop verbose dereference_root

Copies src to dest. If src is a directory, this method copies all its contents recursively. If dest is a directory, copies src to +dest/src+.

src can be a list of files.

  # Installing ruby library "mylib" under the site_ruby
  FileUtils.rm_r site_ruby + '/mylib', :force
  FileUtils.cp_r 'lib/', site_ruby + '/mylib'

  # Examples of copying several files to target directory.
  FileUtils.cp_r %w(mail.rb field.rb debug/), site_ruby + '/tmail'
  FileUtils.cp_r Dir.glob('*.rb'), '/home/aamine/lib/ruby', :noop => true, :verbose => true

  # If you want to copy all contents of a directory instead of the
  # directory itself, c.f. src/x -> dest/x, src/y -> dest/y,
  # use following code.
  FileUtils.cp_r 'src/.', 'dest'     # cp_r('src', 'dest') makes src/dest,
                                     # but this doesn't.

[Source]

# File fileutils.rb, line 417
  def cp_r(src, dest, options = {})
    fu_check_options options, :preserve, :noop, :verbose, :dereference_root
    fu_output_message "cp -r#{options[:preserve] ? 'p' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
    return if options[:noop]
    options[:dereference_root] = true unless options.key?(:dereference_root)
    fu_each_src_dest(src, dest) do |s, d|
      copy_entry s, d, options[:preserve], options[:dereference_root]
    end
  end

[Source]

# File fileutils.rb, line 722
  def fu_have_symlink?   #:nodoc
    File.symlink nil, nil
  rescue NotImplementedError
    return false
  rescue
    return true
  end

[Source]

# File fileutils.rb, line 718
  def fu_world_writable?(st)
    (st.mode & 0002) != 0
  end
getwd()

Alias for pwd

identical?(a, b)

Alias for compare_file

Options: mode noop verbose

If src is not same as dest, copies it and changes the permission mode to mode. If dest is a directory, destination is dest/src.

  FileUtils.install 'ruby', '/usr/local/bin/ruby', :mode => 0755, :verbose => true
  FileUtils.install 'lib.rb', '/usr/local/lib/ruby/site_ruby', :verbose => true

[Source]

# File fileutils.rb, line 825
  def install(src, dest, options = {})
    fu_check_options options, :mode, :preserve, :noop, :verbose
    fu_output_message "install -c#{options[:preserve] && ' -p'}#{options[:mode] ? (' -m 0%o' % options[:mode]) : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
    return if options[:noop]
    fu_each_src_dest(src, dest) do |s, d|
      unless File.exist?(d) and compare_file(s, d)
        remove_file d, true
        st = File.stat(s) if options[:preserve]
        copy_file s, d
        File.utime st.atime, st.mtime, d if options[:preserve]
        File.chmod options[:mode], d if options[:mode]
      end
    end
  end
link(src, dest, options = {})

Alias for ln

Options: force noop verbose

ln(old, new, options = {})

Creates a hard link new which points to old. If new already exists and it is a directory, creates a symbolic link +new/old+. If new already exists and it is not a directory, raises Errno::EEXIST. But if :force option is set, overwrite new.

  FileUtils.ln 'gcc', 'cc', :verbose => true
  FileUtils.ln '/usr/bin/emacs21', '/usr/bin/emacs'

ln(list, destdir, options = {})

Creates several hard links in a directory, with each one pointing to the item in list. If destdir is not a directory, raises Errno::ENOTDIR.

  include FileUtils
  cd '/sbin'
  FileUtils.ln %w(cp mv mkdir), '/bin'   # Now /sbin/cp and /bin/cp are linked.

[Source]

# File fileutils.rb, line 293
  def ln(src, dest, options = {})
    fu_check_options options, :force, :noop, :verbose
    fu_output_message "ln#{options[:force] ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
    return if options[:noop]
    fu_each_src_dest0(src, dest) do |s,d|
      remove_file d, true if options[:force]
      File.link s, d
    end
  end

Options: force noop verbose

ln_s(old, new, options = {})

Creates a symbolic link new which points to old. If new already exists and it is a directory, creates a symbolic link +new/old+. If new already exists and it is not a directory, raises Errno::EEXIST. But if :force option is set, overwrite new.

  FileUtils.ln_s '/usr/bin/ruby', '/usr/local/bin/ruby'
  FileUtils.ln_s 'verylongsourcefilename.c', 'c', :force => true

ln_s(list, destdir, options = {})

Creates several symbolic links in a directory, with each one pointing to the item in list. If destdir is not a directory, raises Errno::ENOTDIR.

If destdir is not a directory, raises Errno::ENOTDIR.

  FileUtils.ln_s Dir.glob('bin/*.rb'), '/home/aamine/bin'

[Source]

# File fileutils.rb, line 332
  def ln_s(src, dest, options = {})
    fu_check_options options, :force, :noop, :verbose
    fu_output_message "ln -s#{options[:force] ? 'f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
    return if options[:noop]
    fu_each_src_dest0(src, dest) do |s,d|
      remove_file d, true if options[:force]
      File.symlink s, d
    end
  end

Options: noop verbose

Same as

  #ln_s(src, dest, :force)

[Source]

# File fileutils.rb, line 355
  def ln_sf(src, dest, options = {})
    fu_check_options options, :noop, :verbose
    options = options.dup
    options[:force] = true
    ln_s src, dest, options
  end
makedirs(list, options = {})

Alias for mkdir_p

Options: mode noop verbose

Creates one or more directories.

  FileUtils.mkdir 'test'
  FileUtils.mkdir %w( tmp data )
  FileUtils.mkdir 'notexist', :noop => true  # Does not really create.
  FileUtils.mkdir 'tmp', :mode => 0700

[Source]

# File fileutils.rb, line 165
  def mkdir(list, options = {})
    fu_check_options options, :mode, :noop, :verbose
    list = fu_list(list)
    fu_output_message "mkdir #{options[:mode] ? ('-m %03o ' % options[:mode]) : ''}#{list.join ' '}" if options[:verbose]
    return if options[:noop]

    list.each do |dir|
      fu_mkdir dir, options[:mode]
    end
  end

Options: mode noop verbose

Creates a directory and all its parent directories. For example,

  FileUtils.mkdir_p '/usr/local/lib/ruby'

causes to make following directories, if it does not exist.

    * /usr
    * /usr/local
    * /usr/local/lib
    * /usr/local/lib/ruby

You can pass several directories at a time in a list.

[Source]

# File fileutils.rb, line 195
  def mkdir_p(list, options = {})
    fu_check_options options, :mode, :noop, :verbose
    list = fu_list(list)
    fu_output_message "mkdir -p #{options[:mode] ? ('-m %03o ' % options[:mode]) : ''}#{list.join ' '}" if options[:verbose]
    return *list if options[:noop]

    list.map {|path| path.sub(%r</\z>, '') }.each do |path|
      # optimize for the most common case
      begin
        fu_mkdir path, options[:mode]
        next
      rescue SystemCallError
        next if File.directory?(path)
      end

      stack = []
      until path == stack.last   # dirname("/")=="/", dirname("C:/")=="C:/"
        stack.push path
        path = File.dirname(path)
      end
      stack.reverse_each do |path|
        begin
          fu_mkdir path, options[:mode]
        rescue SystemCallError => err
          raise unless File.directory?(path)
        end
      end
    end

    return *list
  end
mkpath(list, options = {})

Alias for mkdir_p

move(src, dest, options = {})

Alias for mv

Options: force noop verbose

Moves file(s) src to dest. If file and dest exist on the different disk partition, the file is copied instead.

  FileUtils.mv 'badname.rb', 'goodname.rb'
  FileUtils.mv 'stuff.rb', '/notexist/lib/ruby', :force => true  # no error

  FileUtils.mv %w(junk.txt dust.txt), '/home/aamine/.trash/'
  FileUtils.mv Dir.glob('test*.rb'), 'test', :noop => true, :verbose => true

[Source]

# File fileutils.rb, line 486
  def mv(src, dest, options = {})
    fu_check_options options, :force, :noop, :verbose
    fu_output_message "mv#{options[:force] ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
    return if options[:noop]
    fu_each_src_dest(src, dest) do |s, d|
      destent = Entry_.new(d, nil, true)
      begin
        if destent.exist?
          if destent.directory?
            raise Errno::EEXIST, dest
          else
            destent.remove_file if rename_cannot_overwrite_file?
          end
        end
        begin
          File.rename s, d
        rescue Errno::EXDEV
          copy_entry s, d, true
        end
      rescue SystemCallError
        raise unless options[:force]
      end
    end
  end

Options: (none)

Returns the name of the current directory.

[Source]

# File fileutils.rb, line 100
  def pwd
    Dir.pwd
  end
remove(list, options = {})

Alias for rm

Removes a directory dir and its contents recursively. This method ignores StandardError if force is true.

[Source]

# File fileutils.rb, line 771
  def remove_dir(path, force = false)
    remove_entry path, force   # FIXME?? check if it is a directory
  end

This method removes a file system entry path. path might be a regular file, a directory, or something. If path is a directory, remove it recursively.

See also remove_entry_secure.

[Source]

# File fileutils.rb, line 743
  def remove_entry(path, force = false)
    Entry_.new(path).postorder_traverse do |ent|
      begin
        ent.remove
      rescue
        raise unless force
      end
    end
  rescue
    raise unless force
  end

This method removes a file system entry path. path shall be a regular file, a directory, or something. If path is a directory, remove it recursively. This method is required to avoid TOCTTOU (time-of-check-to-time-of-use) local security vulnerability of rm_r. rm_r causes security hole when:

  * Parent directory is world writable (including /tmp).
  * Removing directory tree includes world writable directory.
  * The system has symbolic link.

To avoid this security hole, this method applies special preprocess. If path is a directory, this method chown(2) and chmod(2) all removing directories. This requires the current process is the owner of the removing whole directory tree, or is the super user (root).

WARNING: You must ensure that ALL parent directories are not world writable. Otherwise this method does not work. Only exception is temporary directory like /tmp and /var/tmp, whose permission is 1777.

WARNING: Only the owner of the removing directory tree, or Unix super user (root) should invoke this method. Otherwise this method does not work.

For details of this security vulnerability, see Perl’s case:

  http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0448
  http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452

For fileutils.rb, this vulnerability is reported in [ruby-dev:26100].

[Source]

# File fileutils.rb, line 667
  def remove_entry_secure(path, force = false)
    unless fu_have_symlink?
      remove_entry path, force
      return
    end
    fullpath = File.expand_path(path)
    st = File.lstat(fullpath)
    unless st.directory?
      File.unlink fullpath
      return
    end
    # is a directory.
    parent_st = File.stat(File.dirname(fullpath))
    unless fu_world_writable?(parent_st)
      remove_entry path, force
      return
    end
    unless parent_st.sticky?
      raise ArgumentError, "parent directory is world writable, FileUtils#remove_entry_secure does not work; abort: #{path.inspect} (parent directory mode #{'%o' % parent_st.mode})"
    end
    # freeze tree root
    euid = Process.euid
    File.open(fullpath + '/.') {|f|
      unless fu_stat_identical_entry?(st, f.stat)
        # symlink (TOC-to-TOU attack?)
        File.unlink fullpath
        return
      end
      f.chown euid, -1
      f.chmod 0700
    }
    # ---- tree root is frozen ----
    root = Entry_.new(path)
    root.preorder_traverse do |ent|
      if ent.directory?
        ent.chown euid, -1
        ent.chmod 0700
      end
    end
    root.postorder_traverse do |ent|
      begin
        ent.remove
      rescue
        raise unless force
      end
    end
  rescue
    raise unless force
  end

Removes a file path. This method ignores StandardError if force is true.

[Source]

# File fileutils.rb, line 760
  def remove_file(path, force = false)
    Entry_.new(path).remove_file
  rescue
    raise unless force
  end

Options: force noop verbose

Remove file(s) specified in list. This method cannot remove directories. All StandardErrors are ignored when the :force option is set.

  FileUtils.rm %w( junk.txt dust.txt )
  FileUtils.rm Dir.glob('*.so')
  FileUtils.rm 'NotExistFile', :force => true   # never raises exception

[Source]

# File fileutils.rb, line 533
  def rm(list, options = {})
    fu_check_options options, :force, :noop, :verbose
    list = fu_list(list)
    fu_output_message "rm#{options[:force] ? ' -f' : ''} #{list.join ' '}" if options[:verbose]
    return if options[:noop]

    list.each do |path|
      remove_file path, options[:force]
    end
  end

Options: noop verbose

Equivalent to

  #rm(list, :force => true)

[Source]

# File fileutils.rb, line 558
  def rm_f(list, options = {})
    fu_check_options options, :noop, :verbose
    options = options.dup
    options[:force] = true
    rm list, options
  end

Options: force noop verbose secure

remove files list[0] list[1]… If list[n] is a directory, removes its all contents recursively. This method ignores StandardError when :force option is set.

  FileUtils.rm_r Dir.glob('/tmp/*')
  FileUtils.rm_r '/', :force => true          #  :-)

WARNING: This method causes local vulnerability if one of parent directories or removing directory tree are world writable (including /tmp, whose permission is 1777), and the current process has strong privilege such as Unix super user (root), and the system has symbolic link. For secure removing, read the documentation of remove_entry_secure carefully, and set :secure option to true. Default is :secure=>false.

NOTE: This method calls remove_entry_secure if :secure option is set. See also remove_entry_secure.

[Source]

# File fileutils.rb, line 593
  def rm_r(list, options = {})
    fu_check_options options, :force, :noop, :verbose, :secure
    # options[:secure] = true unless options.key?(:secure)
    list = fu_list(list)
    fu_output_message "rm -r#{options[:force] ? 'f' : ''} #{list.join ' '}" if options[:verbose]
    return if options[:noop]
    list.each do |path|
      if options[:secure]
        remove_entry_secure path, options[:force]
      else
        remove_entry path, options[:force]
      end
    end
  end

Options: noop verbose secure

Equivalent to

  #rm_r(list, :force => true)

WARNING: This method causes local vulnerability. Read the documentation of rm_r first.

[Source]

# File fileutils.rb, line 621
  def rm_rf(list, options = {})
    fu_check_options options, :noop, :verbose, :secure
    options = options.dup
    options[:force] = true
    rm_r list, options
  end

Options: noop, verbose

Removes one or more directories.

  FileUtils.rmdir 'somedir'
  FileUtils.rmdir %w(somedir anydir otherdir)
  # Does not really remove directory; outputs message.
  FileUtils.rmdir 'somedir', :verbose => true, :noop => true

[Source]

# File fileutils.rb, line 258
  def rmdir(list, options = {})
    fu_check_options options, :noop, :verbose
    list = fu_list(list)
    fu_output_message "rmdir #{list.join ' '}" if options[:verbose]
    return if options[:noop]
    list.each do |dir|
      Dir.rmdir dir.sub(%r</\z>, '')
    end
  end
rmtree(list, options = {})

Alias for rm_rf

safe_unlink(list, options = {})

Alias for rm_f

symlink(src, dest, options = {})

Alias for ln_s

Options: noop verbose

Updates modification time (mtime) and access time (atime) of file(s) in list. Files are created if they don’t exist.

  FileUtils.touch 'timestamp'
  FileUtils.touch Dir.glob('*.c');  system 'make'

[Source]

# File fileutils.rb, line 1006
  def touch(list, options = {})
    fu_check_options options, :noop, :verbose
    list = fu_list(list)
    fu_output_message "touch #{list.join ' '}" if options[:verbose]
    return if options[:noop]
    t = Time.now
    list.each do |path|
      begin
        File.utime(t, t, path)
      rescue Errno::ENOENT
        File.open(path, 'a') {
          ;
        }
      end
    end
  end

Options: (none)

Returns true if newer is newer than all old_list. Non-existent files are older than any file.

  FileUtils.uptodate?('hello.o', %w(hello.c hello.h)) or    #       system 'make hello.o'

[Source]

# File fileutils.rb, line 141
  def uptodate?(new, old_list, options = nil)
    raise ArgumentError, 'uptodate? does not accept any option' if options

    return false unless File.exist?(new)
    new_time = File.mtime(new)
    old_list.each do |old|
      if File.exist?(old)
        return false unless new_time > File.mtime(old)
      end
    end
    true
  end

[Validate]