ansible-playbooks/roles/generate-hosts/tasks/main.yml

---
- name: update hosts
  connection: local
  become: no
  git: repo=~git/public/hosts.git dest=generate-hosts-{{ ansible_hostname }}

- name: generate hosts file
  connection: local
  become: no
  shell: generate-hosts-{{ ansible_hostname }}/generate-hosts.py < generate-hosts-{{ ansible_hostname }}/hosts.in > generate-hosts-{{ ansible_hostname }}/hosts

- name: copy hosts file
  copy: src=generate-hosts-{{ ansible_hostname }}/hosts dest=/etc/hosts backup=yes