add hangouts bridge by copying facebook bridge and find-replacing

roles/matrix-bridge-mautrix-hangouts/tasks/init.yml

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+- set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-mautrix-hangouts'] }}"
+  when: matrix_mautrix_hangouts_enabled|bool
+
+# If the matrix-synapse role is not used, these variables may not exist.
+- set_fact:
+    matrix_synapse_container_extra_arguments: >
+      {{ matrix_synapse_container_extra_arguments|default([]) }}
+      +
+      {{ ["--mount type=bind,src={{ matrix_mautrix_hangouts_config_path }}/registration.yaml,dst=/matrix-mautrix-hangouts-registration.yaml,ro"] }}
+
+    matrix_synapse_app_service_config_files: >
+      {{ matrix_synapse_app_service_config_files|default([]) }}
+      +
+      {{ ["/matrix-mautrix-hangouts-registration.yaml"] }}
+  when: matrix_mautrix_hangouts_enabled|bool

roles/matrix-bridge-mautrix-hangouts/tasks/main.yml

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+- import_tasks: "{{ role_path }}/tasks/init.yml"
+  tags:
+    - always
+
+- import_tasks: "{{ role_path }}/tasks/validate_config.yml"
+  when: "run_setup|bool and matrix_mautrix_hangouts_enabled|bool"
+  tags:
+    - setup-all
+    - setup-mautrix-hangouts
+
+- import_tasks: "{{ role_path }}/tasks/setup_install.yml"
+  when: "run_setup|bool and matrix_mautrix_hangouts_enabled|bool"
+  tags:
+    - setup-all
+    - setup-mautrix-hangouts
+
+- import_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
+  when: "run_setup|bool and not matrix_mautrix_hangouts_enabled|bool"
+  tags:
+    - setup-all
+    - setup-mautrix-hangouts

roles/matrix-bridge-mautrix-hangouts/tasks/setup_install.yml

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+---
+
+# 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
+  fail:
+    msg: >-
+      The matrix-bridge-mautrix-hangouts role needs to execute before the matrix-synapse role.
+  when: "matrix_synapse_role_executed|default(False)"
+
+- name: Ensure Mautrix Hangouts image is pulled
+  docker_image:
+    name: "{{ matrix_mautrix_hangouts_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_mautrix_hangouts_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_mautrix_hangouts_docker_image_force_pull }}"
+
+- name: Ensure Mautrix Hangouts paths exist
+  file:
+    path: "{{ item }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_username }}"
+  with_items:
+    - "{{ matrix_mautrix_hangouts_base_path }}"
+    - "{{ matrix_mautrix_hangouts_config_path }}"
+    - "{{ matrix_mautrix_hangouts_data_path }}"
+
+- name: Check if an old database file already exists
+  stat:
+    path: "{{ matrix_mautrix_hangouts_base_path }}/mautrix-hangouts.db"
+  register: matrix_mautrix_hangouts_stat_database
+
+- name: (Data relocation) Ensure matrix-mautrix-hangouts.service is stopped
+  service:
+    name: matrix-mautrix-hangouts
+    state: stopped
+    daemon_reload: yes
+  failed_when: false
+  when: "matrix_mautrix_hangouts_stat_database.stat.exists"
+
+- name: (Data relocation) Move mautrix-hangouts database file to ./data directory
+  command: "mv {{ matrix_mautrix_hangouts_base_path }}/mautrix-hangouts.db {{ matrix_mautrix_hangouts_data_path }}/mautrix-hangouts.db"
+  when: "matrix_mautrix_hangouts_stat_database.stat.exists"
+
+- name: Ensure mautrix-hangouts config.yaml installed
+  copy:
+    content: "{{ matrix_mautrix_hangouts_configuration|to_nice_yaml }}"
+    dest: "{{ matrix_mautrix_hangouts_config_path }}/config.yaml"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_username }}"
+
+- name: Ensure mautrix-hangouts registration.yaml installed
+  copy:
+    content: "{{ matrix_mautrix_hangouts_registration|to_nice_yaml }}"
+    dest: "{{ matrix_mautrix_hangouts_config_path }}/registration.yaml"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_username }}"
+
+- name: Ensure matrix-mautrix-hangouts.service installed
+  template:
+    src: "{{ role_path }}/templates/systemd/matrix-mautrix-hangouts.service.j2"
+    dest: "/etc/systemd/system/matrix-mautrix-hangouts.service"
+    mode: 0644
+  register: matrix_mautrix_hangouts_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-mautrix-hangouts.service installation
+  service:
+    daemon_reload: yes
+  when: "matrix_mautrix_hangouts_systemd_service_result.changed"

roles/matrix-bridge-mautrix-hangouts/tasks/setup_uninstall.yml

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+---
+
+- name: Check existence of matrix-mautrix-hangouts service
+  stat:
+    path: "/etc/systemd/system/matrix-mautrix-hangouts.service"
+  register: matrix_mautrix_hangouts_service_stat
+
+- name: Ensure matrix-mautrix-hangouts is stopped
+  service:
+    name: matrix-mautrix-hangouts
+    state: stopped
+    daemon_reload: yes
+  when: "matrix_mautrix_hangouts_service_stat.stat.exists"
+
+- name: Ensure matrix-mautrix-hangouts.service doesn't exist
+  file:
+    path: "/etc/systemd/system/matrix-mautrix-hangouts.service"
+    state: absent
+  when: "matrix_mautrix_hangouts_service_stat.stat.exists"
+
+- name: Ensure systemd reloaded after matrix-mautrix-hangouts.service removal
+  service:
+    daemon_reload: yes
+  when: "matrix_mautrix_hangouts_service_stat.stat.exists"

roles/matrix-bridge-mautrix-hangouts/tasks/validate_config.yml

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