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-bridge-heisenbridge/tasks/init.yml

@@ -0,0 +1,29 @@
+---
+# If the matrix-synapse role is not used, `matrix_synapse_role_executed` won't exist.
+# We don't want to fail in such cases.
+- name: Fail if matrix-synapse role already executed
+  ansible.builtin.fail:
+    msg: >-
+      The matrix-bridge-heisenbridge role needs to execute before the matrix-synapse role.
+  when: "matrix_heisenbridge_enabled and matrix_synapse_role_executed | default(False)"
+
+- ansible.builtin.set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-heisenbridge.service'] }}"
+  when: matrix_heisenbridge_enabled | bool
+
+# If the matrix-synapse role is not used, these variables may not exist.
+- ansible.builtin.set_fact:
+    matrix_homeserver_container_runtime_injected_arguments: >
+      {{
+        matrix_homeserver_container_runtime_injected_arguments | default([])
+        +
+        ["--mount type=bind,src={{ matrix_heisenbridge_base_path }}/registration.yaml,dst=/heisenbridge-registration.yaml,ro"]
+      }}
+
+    matrix_homeserver_app_service_runtime_injected_config_files: >
+      {{
+        matrix_homeserver_app_service_runtime_injected_config_files | default([])
+        +
+        ["/heisenbridge-registration.yaml"]
+      }}
+  when: matrix_heisenbridge_enabled | bool

roles/custom/matrix-bridge-heisenbridge/tasks/main.yml

@@ -0,0 +1,17 @@
+---
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/init.yml"
+  tags:
+    - always
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_install.yml"
+  when: "run_setup | bool and matrix_heisenbridge_enabled | bool"
+  tags:
+    - setup-all
+    - setup-heisenbridge
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
+  when: "run_setup | bool and not matrix_heisenbridge_enabled | bool"
+  tags:
+    - setup-all
+    - setup-heisenbridge

roles/custom/matrix-bridge-heisenbridge/tasks/setup_install.yml

@@ -0,0 +1,42 @@
+---
+
+- name: Ensure heisenbridge image is pulled
+  community.docker.docker_image:
+    name: "{{ matrix_heisenbridge_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_heisenbridge_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_heisenbridge_docker_image_force_pull }}"
+  register: result
+  retries: "{{ matrix_container_retries_count }}"
+  delay: "{{ matrix_container_retries_delay }}"
+  until: result is not failed
+
+- name: Ensure heisenbridge paths exist
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - "{{ matrix_heisenbridge_base_path }}"
+
+- name: Ensure heisenbridge registration.yaml installed if provided
+  ansible.builtin.copy:
+    content: "{{ matrix_heisenbridge_registration | to_nice_yaml(indent=2, width=999999) }}"
+    dest: "{{ matrix_heisenbridge_base_path }}/registration.yaml"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+
+- name: Ensure matrix-heisenbridge.service installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/systemd/matrix-heisenbridge.service.j2"
+    dest: "{{ matrix_systemd_path }}/matrix-heisenbridge.service"
+    mode: 0644
+  register: matrix_heisenbridge_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-heisenbridge.service installation
+  ansible.builtin.service:
+    daemon_reload: true
+  when: matrix_heisenbridge_systemd_service_result.changed

roles/custom/matrix-bridge-heisenbridge/tasks/setup_uninstall.yml

@@ -0,0 +1,25 @@
+---
+
+- name: Check existence of matrix-heisenbridge service
+  ansible.builtin.stat:
+    path: "{{ matrix_systemd_path }}/matrix-heisenbridge.service"
+  register: matrix_heisenbridge_service_stat
+
+- name: Ensure matrix-heisenbridge is stopped
+  ansible.builtin.service:
+    name: matrix-heisenbridge
+    state: stopped
+    enabled: false
+    daemon_reload: true
+  when: "matrix_heisenbridge_service_stat.stat.exists"
+
+- name: Ensure matrix-heisenbridge.service doesn't exist
+  ansible.builtin.file:
+    path: "{{ matrix_systemd_path }}/matrix-heisenbridge.service"
+    state: absent
+  when: "matrix_heisenbridge_service_stat.stat.exists"
+
+- name: Ensure systemd reloaded after matrix-heisenbridge.service removal
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_heisenbridge_service_stat.stat.exists"