Add Email2Matrix support

roles/matrix-email2matrix/tasks/init.yml

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+- set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-email2matrix'] }}"
+  when: matrix_email2matrix_enabled|bool

roles/matrix-email2matrix/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_email2matrix_enabled|bool"
+  tags:
+    - setup-all
+    - setup-email2matrix
+
+- import_tasks: "{{ role_path }}/tasks/setup_email2matrix.yml"
+  when: run_setup|bool
+  tags:
+    - setup-all
+    - setup-email2matrix

roles/matrix-email2matrix/tasks/setup_email2matrix.yml

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+---
+
+#
+# Tasks related to setting up Email2Matrix
+#
+
+- name: Ensure Email2Matrix paths exist
+  file:
+    path: "{{ item }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_username }}"
+  with_items:
+    - "{{ matrix_email2matrix_base_path }}"
+    - "{{ matrix_email2matrix_config_dir_path }}"
+  when: matrix_email2matrix_enabled|bool
+
+- name: Ensure Email2Matrix configuration file created
+  template:
+    src: "{{ role_path }}/templates/config.json.j2"
+    dest: "{{ matrix_email2matrix_config_dir_path }}/config.json"
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_username }}"
+    mode: 0640
+  when: matrix_email2matrix_enabled|bool
+
+- name: Ensure Email2Matrix image is pulled
+  docker_image:
+    name: "{{ matrix_email2matrix_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_email2matrix_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_email2matrix_docker_image_force_pull }}"
+  when: matrix_email2matrix_enabled|bool
+
+- name: Ensure matrix-email2matrix.service installed
+  template:
+    src: "{{ role_path }}/templates/systemd/matrix-email2matrix.service.j2"
+    dest: "/etc/systemd/system/matrix-email2matrix.service"
+    mode: 0644
+  register: matrix_email2matrix_systemd_service_result
+  when: matrix_email2matrix_enabled|bool
+
+- name: Ensure systemd reloaded after matrix-email2matrix.service installation
+  service:
+    daemon_reload: yes
+  when: "matrix_email2matrix_enabled|bool and matrix_email2matrix_systemd_service_result.changed"
+
+#
+# Tasks related to getting rid of the Email2Matrix (if it was previously enabled)
+#
+
+- name: Check existence of matrix-email2matrix service
+  stat:
+    path: "/etc/systemd/system/matrix-email2matrix.service"
+  register: matrix_email2matrix_service_stat
+  when: "not matrix_email2matrix_enabled|bool"
+
+- name: Ensure matrix-email2matrix is stopped
+  service:
+    name: matrix-email2matrix
+    state: stopped
+    daemon_reload: yes
+  register: stopping_result
+  when: "not matrix_email2matrix_enabled|bool and matrix_email2matrix_service_stat.stat.exists"
+
+- name: Ensure matrix-email2matrix.service doesn't exist
+  file:
+    path: "/etc/systemd/system/matrix-email2matrix.service"
+    state: absent
+  when: "not matrix_email2matrix_enabled|bool and matrix_email2matrix_service_stat.stat.exists"
+
+- name: Ensure systemd reloaded after matrix-email2matrix.service removal
+  service:
+    daemon_reload: yes
+  when: "not matrix_email2matrix_enabled|bool and matrix_email2matrix_service_stat.stat.exists"
+
+- name: Ensure Email2Matrix data path doesn't exist
+  file:
+    path: "{{ matrix_email2matrix_base_path }}"
+    state: absent
+  when: "not matrix_email2matrix_enabled|bool"
+
+- name: Ensure Email2Matrix Docker image doesn't exist
+  docker_image:
+    name: "{{ matrix_email2matrix_docker_image }}"
+    state: absent
+  when: "not matrix_email2matrix_enabled|bool"

roles/matrix-email2matrix/tasks/validate_config.yml

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+---
+
+- name: Fail if no mappings
+  fail:
+    msg: >
+      You need to define at least one mapping in `matrix_email2matrix_matrix_mappings` for enabling Email2Matrix.
+  when: "matrix_email2matrix_matrix_mappings|length == 0"