Ansible set_fact with double quotes and back slashes

Question

I'm trying to format a grep command like: grep -E "\b{{ansible-variable}}(\s|$)", but with both double quotes and back slashes, it's not working.

Answer 1

The easiest for those cases is to use YAML multiline syntax.

 - command: >-
     grep -E "\b{{ansible_variable}}(\s|$)"
   vars:
     ansible_variable: foo

Also, a nice tool to play with its multiple forms can be found here.