Move roles/matrix* to roles/custom/matrix*

This paves the way for installing other roles into `roles/galaxy` using `ansible-galaxy`,
similar to how it's done in:

- https://github.com/spantaleev/gitea-docker-ansible-deploy
- https://github.com/spantaleev/nextcloud-docker-ansible-deploy

In the near future, we'll be removing a lot of the shared role code from here
and using upstream roles for it. Some of the core `matrix-*` roles have
already been extracted out into other reusable roles:

- https://github.com/devture/com.devture.ansible.role.postgres
- https://github.com/devture/com.devture.ansible.role.systemd_docker_base
- https://github.com/devture/com.devture.ansible.role.timesync
- https://github.com/devture/com.devture.ansible.role.vars_preserver
- https://github.com/devture/com.devture.ansible.role.playbook_runtime_messages
- https://github.com/devture/com.devture.ansible.role.playbook_help

We just need to migrate to those.

roles/custom/matrix-bot-postmoogle/tasks/init.yml

@@ -0,0 +1,5 @@
+---
+
+- ansible.builtin.set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-bot-postmoogle.service'] }}"
+  when: matrix_bot_postmoogle_enabled | bool

roles/custom/matrix-bot-postmoogle/tasks/main.yml

@@ -0,0 +1,23 @@
+---
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/init.yml"
+  tags:
+    - always
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/validate_config.yml"
+  when: "run_setup | bool and matrix_bot_postmoogle_enabled | bool"
+  tags:
+    - setup-all
+    - setup-bot-postmoogle
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_install.yml"
+  when: "run_setup | bool and matrix_bot_postmoogle_enabled | bool"
+  tags:
+    - setup-all
+    - setup-bot-postmoogle
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
+  when: "run_setup | bool and not matrix_bot_postmoogle_enabled | bool"
+  tags:
+    - setup-all
+    - setup-bot-postmoogle

roles/custom/matrix-bot-postmoogle/tasks/setup_install.yml

@@ -0,0 +1,93 @@
+---
+- when: "matrix_bot_postmoogle_database_engine == 'postgres'"
+  block:
+    - name: Check if an SQLite database already exists
+      ansible.builtin.stat:
+        path: "{{ matrix_bot_postmoogle_sqlite_database_path_local }}"
+      register: matrix_bot_postmoogle_sqlite_database_path_local_stat_result
+
+    - when: "matrix_bot_postmoogle_sqlite_database_path_local_stat_result.stat.exists | bool"
+      block:
+        - ansible.builtin.set_fact:
+            matrix_postgres_db_migration_request:
+              src: "{{ matrix_bot_postmoogle_sqlite_database_path_local }}"
+              dst: "{{ matrix_bot_postmoogle_database_connection_string }}"
+              caller: "{{ role_path | basename }}"
+              engine_variable_name: 'matrix_bot_postmoogle_database_engine'
+              engine_old: 'sqlite'
+              systemd_services_to_stop: ['matrix-bot-postmoogle.service']
+
+        - ansible.builtin.import_role:
+            name: custom/matrix-postgres
+            tasks_from: migrate_db_to_postgres
+
+        - ansible.builtin.set_fact:
+            matrix_bot_postmoogle_requires_restart: true
+
+- name: Ensure postmoogle paths exist
+  ansible.builtin.file:
+    path: "{{ item.path }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - {path: "{{ matrix_bot_postmoogle_config_path }}", when: true}
+    - {path: "{{ matrix_bot_postmoogle_data_path }}", when: true}
+    - {path: "{{ matrix_bot_postmoogle_docker_src_files_path }}", when: matrix_bot_postmoogle_container_image_self_build}
+  when: "item.when | bool"
+
+- name: Ensure postmoogle environment variables file created
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/env.j2"
+    dest: "{{ matrix_bot_postmoogle_config_path }}/env"
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+    mode: 0640
+
+- name: Ensure postmoogle image is pulled
+  community.docker.docker_image:
+    name: "{{ matrix_bot_postmoogle_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_bot_postmoogle_docker_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
+    force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_bot_postmoogle_docker_image_force_pull }}"
+  when: "not matrix_bot_postmoogle_container_image_self_build | bool"
+  register: result
+  retries: "{{ matrix_container_retries_count }}"
+  delay: "{{ matrix_container_retries_delay }}"
+  until: result is not failed
+
+- name: Ensure postmoogle repository is present on self-build
+  ansible.builtin.git:
+    repo: "{{ matrix_bot_postmoogle_docker_repo }}"
+    version: "{{ matrix_bot_postmoogle_docker_repo_version }}"
+    dest: "{{ matrix_bot_postmoogle_docker_src_files_path }}"
+    force: "yes"
+  become: true
+  become_user: "{{ matrix_user_username }}"
+  register: matrix_bot_postmoogle_git_pull_results
+  when: "matrix_bot_postmoogle_container_image_self_build | bool"
+
+- name: Ensure postmoogle image is built
+  community.docker.docker_image:
+    name: "{{ matrix_bot_postmoogle_docker_image }}"
+    source: build
+    force_source: "{{ matrix_bot_postmoogle_git_pull_results.changed if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
+    force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_mailer_git_pull_results.changed }}"
+    build:
+      dockerfile: Dockerfile
+      path: "{{ matrix_bot_postmoogle_docker_src_files_path }}"
+      pull: true
+  when: "matrix_bot_postmoogle_container_image_self_build | bool"
+
+- name: Ensure matrix-bot-postmoogle.service installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/systemd/matrix-bot-postmoogle.service.j2"
+    dest: "{{ matrix_systemd_path }}/matrix-bot-postmoogle.service"
+    mode: 0644
+  register: matrix_bot_postmoogle_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-bot-postmoogle.service installation
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_bot_postmoogle_systemd_service_result.changed | bool"

roles/custom/matrix-bot-postmoogle/tasks/setup_uninstall.yml

@@ -0,0 +1,36 @@
+---
+
+- name: Check existence of matrix-postmoogle service
+  ansible.builtin.stat:
+    path: "{{ matrix_systemd_path }}/matrix-bot-postmoogle.service"
+  register: matrix_bot_postmoogle_service_stat
+
+- name: Ensure matrix-postmoogle is stopped
+  ansible.builtin.service:
+    name: matrix-bot-postmoogle
+    state: stopped
+    enabled: false
+    daemon_reload: true
+  register: stopping_result
+  when: "matrix_bot_postmoogle_service_stat.stat.exists | bool"
+
+- name: Ensure matrix-bot-postmoogle.service doesn't exist
+  ansible.builtin.file:
+    path: "{{ matrix_systemd_path }}/matrix-bot-postmoogle.service"
+    state: absent
+  when: "matrix_bot_postmoogle_service_stat.stat.exists | bool"
+
+- name: Ensure systemd reloaded after matrix-bot-postmoogle.service removal
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_bot_postmoogle_service_stat.stat.exists | bool"
+
+- name: Ensure Matrix postmoogle paths don't exist
+  ansible.builtin.file:
+    path: "{{ matrix_bot_postmoogle_base_path }}"
+    state: absent
+
+- name: Ensure postmoogle Docker image doesn't exist
+  community.docker.docker_image:
+    name: "{{ matrix_bot_postmoogle_docker_image }}"
+    state: absent

roles/custom/matrix-bot-postmoogle/tasks/validate_config.yml

@@ -0,0 +1,9 @@
+---
+
+- name: Fail if required settings not defined
+  ansible.builtin.fail:
+    msg: >-
+      You need to define a required configuration setting (`{{ item }}`).
+  when: "vars[item] == ''"
+  with_items:
+    - "matrix_bot_postmoogle_password"