Task

Create a directory and any missing parents.

This task is named after the posix mkdir -p command, and several libraries which implement the same behavior.

Please implement a function of a single path string (for example ./path/to/dir) which has the above side-effect.
If the directory already exists, return successfully.
Ideally implementations will work equally well cross-platform (on windows, linux, and OS X).

It's likely that your language implements such a function as part of its standard library. If so, please also show how such a function would be implemented.




$ include "seed7_05.s7i";
  include "cli_cmds.s7i";
 
const proc: main is func
  begin
    doMkdirCmd(argv(PROGRAM), TRUE);
  end func;