Calls ::Dir#chdir.

Changes the current working directory of the process to the directory specified by the Rio. Raises a SystemCallError (probably Errno::ENOENT) if the target directory does not exist or if the Rio does not reference a directory.

If a block is given changes to the directory specified by the rio for the length of the block and changes back outside the block

Returns the Rio

 rio('/home').chdir  # change the current working directory to /home
 # the working directory here is /home
 rio('/tmp/data/mydata').delete!.mkpath.chdir {
    # the working directory here is /tmp/data/mydata
 }
 # the working directory here is /home

Calls Find#find

Uses ::Find#find to find all entries recursively for a Rio that specifies a directory. Note that there are other ways to recurse through a directory structure using a Rio. See each and all.

Calls the block passing a Rio for each entry found. The Rio inherits file attrubutes from the directory Rio.

Returns itself

 rio('adir').find { |entrio| puts "#{entrio}: #{entrio.file?}" }

 rio('adir').chomp.find do |entrio|
   next unless entrio.file?
   lines = entrio[0..10]  # lines are chomped because 'chomp' was inherited
 end

Calls ::Dir#glob

Returns the filenames found by expanding the pattern given in string, either as an array or as parameters to the block. In both cases the filenames are expressed as a Rio. Note that this pattern is not a regexp (it’s closer to a shell glob). See File::fnmatch for details of file name matching and the meaning of the flags parameter.

Calls FileUtils#mkdir

Makes a new directory named by the Rio with permissions specified by the optional parameter. The permissions may be modified by the value of File::umask

Returns the Rio. If the directory already exists, just returns the Rio.

 rio('adir').mkdir

Calls FileUtils#mkpath

Makes a new directory named by the Rio and any directories in its path that do not exist.

Returns the Rio. If the directory already exists, just returns the Rio.

 rio('adir/a/b').mkpath

Calls ::Dir#rmdir

Deletes the directory referenced by the Rio. Raises a subclass of SystemCallError if the directory isn’t empty. Returns the Rio. If the directory does not exist, just returns the Rio.

See also rmtree, delete, delete!

   rio('adir').rmdir # remove the empty directory 'adir'

Calls FileUtils#rmtree

Removes a directory Rio recursively. Returns the Rio. If the directory does not exist, simply returns the Rio

If called with a block, behaves as if rmtree.each(&block) had been called

See also delete!

 rio('adir').rmtree # removes the directory 'adir' recursively

 # delete the directory 'adir', recreate it and then change to the new directory
 rio('adir/asubdir').rmtree.mkpath.chdir {
   ...
 }