Bash: One-liner to exit with the opposite status of a grep command?

Question

How can I reduce the following bash script?

grep -P \"STATUS: (?!Perfect)\" recess.txt && exit 1
exit 0

It seems like I should be able

Answer 1

Since someone already posted a Puppet solution, I might as well add how to invert a shell command run by Ansible:

  - name: Check logs for errors
    command: grep ERROR /var/log/cassandra/system.log
    register: log_errors
    failed_when: "log_errors.rc == 0"

I.e. you just set the failed condition to the return code being 0. So this command fails if we do find the word ERROR in our logs.

I chose this rather than grep -v as that also inverts grep's output, so we would receive all DEBUG/INFO/WARN lines in log_errors.stdout_lines which we do not want.