ansible/ansible — pull request #2252 by skinp (2013-03-01 16:20:11+00:00)
Title: Add support for a no_change option in command module

A new argument `no_change=yes` can be passed to the command module which forces the return status of `change=False`.
This is useful for commands you are sure are not going to modify anything and in combination with register. For example:

- action: command ls / no_change=yes
register: root_files

#do something with ${root_files.stdout}