exec the cd command in a ruby script

Question

I\'d like to change the pwd of the current shell from within a ruby script. So:

> pwd
/tmp
> ruby cdscript.rb
> pwd
/usr/bin

This

Answer 1

You can't change the working directory (or the environment variables for that matter) of the shell that invoked you in a ruby script (or any other kind of application). The only commands that can change the pwd of the current shell are shell built-ins.