- name: Merge SpamAssassin databases
  hosts: "{{ hosts | default('all') }}"
  gather_facts: false
  tasks:
    - block:
      - name: Stop exim
        become: true
        service:
          name: exim4
          state: stopped
      - name: Stop SpamAssassin
        become: true
        service:
          name: spamassassin
          state: stopped

      - name: Backup SpamAssassin DB
        shell: "exec sa-learn --backup >~/tmp/sa-learn.backup@{{ inventory_hostname }}"
      - name: Fetch SpamAssassin DB backup
        synchronize:
          src: "~/tmp/sa-learn.backup@{{ inventory_hostname }}"
          dest: "~/tmp/sa-learn.backup@{{ inventory_hostname }}"
          mode: pull
      when: inventory_hostname != 'localhost'

    - name: Combine SpamAssassin DB backups
      shell: "cd ~/tmp && exec cat sa-learn.backup.* >sa-learn.backup"
      when: inventory_hostname == 'localhost'

    - block:
      - name: Push combined SpamAssassin DB backup
        synchronize:
          src: "~/tmp/sa-learn.backup"
          dest: "~/tmp/sa-learn.backup"
      - name: Restore combined SpamAssassin DB
        shell: "cd tmp && sa-learn --clear && sa-learn --restore sa-learn.backup && exec sa-learn --sync"

      - name: Start SpamAssassin
        become: true
        service:
          name: spamassassin
          state: started
      - name: Start exim
        become: true
        service:
          name: exim4
          state: started
      when: inventory_hostname != 'localhost'

    - name: Cleanup
      shell: "cd ~/tmp && exec rm sa-learn.backup*"