command-instead-of-shell

This rule identifies uses of shell modules instead of a command one when this is not really needed. Shell is considerably slower than command and should be avoided unless there is a special need for using shell features, like environment variable expansion or chaining multiple commands using pipes.

Problematic Code

---
- name: Problematic example
  hosts: localhost
  tasks:
    - name: Echo a message
      ansible.builtin.shell: echo hello # <-- command is better in this case
      changed_when: false

Correct Code

---
- name: Correct example
  hosts: localhost
  tasks:
    - name: Echo a message
      ansible.builtin.command: echo hello
      changed_when: false

Note

This rule can be automatically fixed using --fix option.