matrix-docker-ansible-deploy/roles/matrix-bridge-mx-puppet-twitter/tasks/validate_config.yml

---

- name: Fail if required settings not defined
  fail:
    msg: >-
      You need to define a required configuration setting (`{{ item }}`).      
  when: "vars[item] == ''"
  with_items:
    - "matrix_mx_puppet_twitter_appservice_token"
    - "matrix_mx_puppet_twitter_homeserver_token"

- block:
  - name: Check if an SQLite database already exists
    stat:
      path: "{{ matrix_mx_puppet_twitter_sqlite_data_path }}/database.db"
    register: matrix_mx_puppet_twitter_sqlite_database_path_local_stat_result

  - name: Fail if an SQLite database already exists when using Postgres
    fail:
      msg: >-
        matrix_mx_puppet_twitter_database_engine has been set to `postgres` (which is our new default now).
        However, we've discovered an existing SQLite database in {{ matrix_mx_puppet_twitter_data_path }}/database.db.
        It appears that you've been using this bridge with the SQLite engine until now.
        To continue using SQLite, opt into it explicitly: add `matrix_mx_puppet_twitter_database_engine: sqlite` to your vars.yml file and re-run this same command.
        Alternatively, to migrate your existing SQLite database to Postgres:
        1. Stop all services (`ansible-playbook -i inventory/hosts setup.yml --tags=stop`)
        2. Import the SQLite database into Postgres (`ansible-playbook -v -i inventory/hosts setup.yml --tags=import-generic-sqlite-db --extra-vars='sqlite_database_path={{ matrix_mx_puppet_twitter_data_path }}/database.db postgres_connection_string_variable_name=matrix_mx_puppet_twitter_database_connString'`)
        3. Re-run the playbook (`ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start`)        
    when: "matrix_mx_puppet_twitter_sqlite_database_path_local_stat_result.stat.exists"
  when: "matrix_mx_puppet_twitter_database_engine == 'postgres'"