install-system-packages.yml

---
- hosts: localhost
  connection: local
  become: yes
  vars:
    os_packages:
    - git
    - tree
    pip_packages:
    - boto
  tasks:
  - name: Yum packages
    yum:
      name: '{{ item }}'
      state: present
    with_items: '{{ os_packages }}'
    when: ansible_pkg_mgr | lower == 'yum'

  - name: Debian packages
    apt:
      name: '{{ item }}'
      state: present
    with_items: '{{ os_packages }}'
    when: ansible_pkg_mgr | lower == 'apt'

  - name: Pip packages
    pip:
      name: '{{ item }}'
      state: present
    with_items: '{{ pip_packages }}'