How to run a shell command in ansible's check mode?

Question

In check mode, I want to display the current commit in the server. I'm using the shell command (git rev-parse HEAD) to register the variable and then print/debug it but ansible skips shell commands in check mode.

Is there anyway to mark a shell command as safe to run in check mode?

Or any ansible module to do what I want? I checked into git's module but it only looks like it does checkouts.

Any input would be appreciated.

Answer 1

Starting from Ansible 2.2, the right way to do it is to use check_mode: no:

tasks:
  - name: this task will make changes to the system even in check mode
    command: /something/to/run --even-in-check-mode
    check_mode: no

Answer 2

Found the answer. You have to add always_run: True to the task.