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-client-element/tasks/init.yml

@@ -0,0 +1,12 @@
+---
+
+- ansible.builtin.set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-client-element.service'] }}"
+  when: matrix_client_element_enabled | bool
+
+# See https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1070
+# and https://github.com/spantaleev/matrix-docker-ansible-deploy/commit/1ab507349c752042d26def3e95884f6df8886b74#commitcomment-51108407
+- name: Fail if trying to self-build on Ansible < 2.8
+  ansible.builtin.fail:
+    msg: "To self-build the Element image, you should use Ansible 2.8 or higher. See docs/ansible.md"
+  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_client_element_container_image_self_build and matrix_client_element_enabled"

roles/custom/matrix-client-element/tasks/main.yml

@@ -0,0 +1,42 @@
+---
+
+- 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_client_element_enabled | bool"
+  tags:
+    - setup-all
+    - setup-client-element
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/prepare_themes.yml"
+  when: run_setup | bool
+  tags:
+    - setup-all
+    - setup-client-element
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/migrate_riot_web.yml"
+  when: run_setup | bool
+  tags:
+    - setup-all
+    - setup-client-element
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_install.yml"
+  when: "run_setup | bool and matrix_client_element_enabled | bool"
+  tags:
+    - setup-all
+    - setup-client-element
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
+  when: "run_setup | bool and not matrix_client_element_enabled | bool"
+  tags:
+    - setup-all
+    - setup-client-element
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/self_check.yml"
+  delegate_to: 127.0.0.1
+  become: false
+  when: "run_self_check | bool and matrix_client_element_enabled | bool"
+  tags:
+    - self-check

roles/custom/matrix-client-element/tasks/migrate_riot_web.yml

@@ -0,0 +1,37 @@
+---
+
+- name: Check existence of matrix-riot-web.service
+  ansible.builtin.stat:
+    path: "{{ matrix_systemd_path }}/matrix-riot-web.service"
+  register: matrix_client_riot_web_service_stat
+  when: "matrix_client_element_enabled | bool"
+
+- name: Ensure matrix-riot-web is stopped
+  ansible.builtin.service:
+    name: matrix-riot-web
+    state: stopped
+    enabled: false
+    daemon_reload: true
+  register: stopping_result
+  when: "matrix_client_element_enabled | bool and matrix_client_riot_web_service_stat.stat.exists"
+
+- name: Ensure matrix-riot-web.service doesn't exist
+  ansible.builtin.file:
+    path: "{{ matrix_systemd_path }}/matrix-riot-web.service"
+    state: absent
+  when: "matrix_client_element_enabled | bool and matrix_client_riot_web_service_stat.stat.exists"
+
+- name: Ensure systemd reloaded after matrix-riot-web.service removal
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_client_element_enabled | bool and matrix_client_riot_web_service_stat.stat.exists"
+
+- name: Check existence of /matrix/riot-web
+  ansible.builtin.stat:
+    path: "/matrix/riot-web"
+  register: matrix_client_riot_web_dir_stat
+  when: "matrix_client_element_enabled | bool"
+
+- name: Relocate /matrix/riot-web to /matrix/client-element
+  ansible.builtin.command: "mv /matrix/riot-web /matrix/client-element"
+  when: "matrix_client_element_enabled | bool and matrix_client_riot_web_dir_stat.stat.exists"

roles/custom/matrix-client-element/tasks/prepare_themes.yml

@@ -0,0 +1,47 @@
+---
+
+#
+# Tasks related to setting up Element themes
+#
+
+- when: matrix_client_element_themes_enabled | bool
+  run_once: true
+  delegate_to: 127.0.0.1
+  become: false
+  block:
+  - name: Ensure Element themes repository is pulled
+    ansible.builtin.git:
+      repo: "{{ matrix_client_element_themes_repository_url }}"
+      version: "{{ matrix_client_element_themes_repository_version }}"
+      dest: "{{ role_path }}/files/scratchpad/themes"
+
+  - name: Find all Element theme files
+    ansible.builtin.find:
+      paths: "{{ role_path }}/files/scratchpad/themes"
+      patterns: "*.json"
+      recurse: true
+    register: matrix_client_element_theme_file_list
+
+  - name: Read Element theme
+    ansible.builtin.slurp:
+      path: "{{ item.path }}"
+    register: "matrix_client_element_theme_file_contents"
+    with_items: "{{ matrix_client_element_theme_file_list.files }}"
+
+  - name: Load Element theme
+    ansible.builtin.set_fact:
+      matrix_client_element_settingDefaults_custom_themes: "{{ matrix_client_element_settingDefaults_custom_themes + [item['content'] | b64decode | from_json] }}"  # noqa var-naming
+    with_items: "{{ matrix_client_element_theme_file_contents.results }}"
+
+#
+# Tasks related to getting rid of Element themes (if it was previously enabled)
+#
+
+- name: Ensure Element themes repository is removed
+  ansible.builtin.file:
+    path: "{{ role_path }}/files/scratchpad/themes"
+    state: absent
+  run_once: true
+  delegate_to: 127.0.0.1
+  become: false
+  when: "not matrix_client_element_themes_enabled | bool"

roles/custom/matrix-client-element/tasks/self_check.yml

@@ -0,0 +1,22 @@
+---
+
+- ansible.builtin.set_fact:
+    matrix_client_element_url_endpoint_public: "https://{{ matrix_server_fqn_element }}/config.json"
+
+- name: Check Element
+  ansible.builtin.uri:
+    url: "{{ matrix_client_element_url_endpoint_public }}"
+    follow_redirects: none
+    validate_certs: "{{ matrix_client_element_self_check_validate_certificates }}"
+  register: matrix_client_element_self_check_result
+  check_mode: false
+  ignore_errors: true
+
+- name: Fail if Element not working
+  ansible.builtin.fail:
+    msg: "Failed checking Element is up at `{{ matrix_server_fqn_element }}` (checked endpoint: `{{ matrix_client_element_url_endpoint_public }}`). Is Element running? Is port 443 open in your firewall? Full error: {{ matrix_client_element_self_check_result }}"
+  when: "matrix_client_element_self_check_result.failed or 'json' not in matrix_client_element_self_check_result"
+
+- name: Report working Element
+  ansible.builtin.debug:
+    msg: "Element at `{{ matrix_server_fqn_element }}` is working (checked endpoint: `{{ matrix_client_element_url_endpoint_public }}`)"

roles/custom/matrix-client-element/tasks/setup_install.yml

@@ -0,0 +1,103 @@
+---
+
+- name: Ensure Element paths exists
+  ansible.builtin.file:
+    path: "{{ item.path }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - {path: "{{ matrix_client_element_data_path }}", when: true}
+    - {path: "{{ matrix_client_element_docker_src_files_path }}", when: "{{ matrix_client_element_container_image_self_build }}"}
+  when: "item.when | bool"
+
+- name: Ensure Element Docker image is pulled
+  community.docker.docker_image:
+    name: "{{ matrix_client_element_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_client_element_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_client_element_docker_image_force_pull }}"
+  when: "not matrix_client_element_container_image_self_build | bool"
+  register: result
+  retries: "{{ matrix_container_retries_count }}"
+  delay: "{{ matrix_container_retries_delay }}"
+  until: result is not failed
+
+- name: Ensure Element repository is present on self-build
+  ansible.builtin.git:
+    repo: "{{ matrix_client_element_container_image_self_build_repo }}"
+    dest: "{{ matrix_client_element_docker_src_files_path }}"
+    version: "{{ matrix_client_element_docker_image.split(':')[1] }}"
+    force: "yes"
+  become: true
+  become_user: "{{ matrix_user_username }}"
+  register: matrix_client_element_git_pull_results
+  when: "matrix_client_element_container_image_self_build | bool"
+
+# See:
+# - https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1357
+# - https://github.com/vector-im/element-web/issues/19544
+- name: Patch webpack.config.js to support building on low-memory (<4G RAM) devices
+  ansible.builtin.lineinfile:
+    path: "{{ matrix_client_element_docker_src_files_path }}/webpack.config.js"
+    regexp: '(\s+)splitChunks: \{'
+    line: '\1splitChunks: { maxSize: 100000,'
+    backrefs: true
+    owner: root
+    group: root
+    mode: '0644'
+  when: "matrix_client_element_container_image_self_build | bool and matrix_client_element_container_image_self_build_low_memory_system_patch_enabled | bool"
+
+- name: Ensure Element Docker image is built
+  community.docker.docker_image:
+    name: "{{ matrix_client_element_docker_image }}"
+    source: build
+    force_source: "{{ matrix_client_element_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_client_element_git_pull_results.changed }}"
+    build:
+      dockerfile: Dockerfile
+      path: "{{ matrix_client_element_docker_src_files_path }}"
+      pull: true
+  when: "matrix_client_element_container_image_self_build | bool"
+
+- name: Ensure Element configuration installed
+  ansible.builtin.copy:
+    content: "{{ matrix_client_element_configuration | to_nice_json }}"
+    dest: "{{ matrix_client_element_data_path }}/config.json"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+
+- name: Ensure Element config files installed
+  ansible.builtin.template:
+    src: "{{ item.src }}"
+    dest: "{{ matrix_client_element_data_path }}/{{ item.name }}"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - {src: "{{ role_path }}/templates/nginx.conf.j2", name: "nginx.conf"}
+    - {src: "{{ matrix_client_element_page_template_welcome_path }}", name: "welcome.html"}
+    - {src: "{{ matrix_client_element_embedded_pages_home_path }}", name: "home.html"}
+  when: "item.src is not none"
+
+- name: Ensure Element config files removed
+  ansible.builtin.file:
+    path: "{{ matrix_client_element_data_path }}/{{ item.name }}"
+    state: absent
+  with_items:
+    - {src: "{{ matrix_client_element_embedded_pages_home_path }}", name: "home.html"}
+  when: "item.src is none"
+
+- name: Ensure matrix-client-element.service installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/systemd/matrix-client-element.service.j2"
+    dest: "{{ matrix_systemd_path }}/matrix-client-element.service"
+    mode: 0644
+  register: matrix_client_element_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-client-element.service installation
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_client_element_systemd_service_result.changed | bool"

roles/custom/matrix-client-element/tasks/setup_uninstall.yml

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

roles/custom/matrix-client-element/tasks/validate_config.yml

@@ -0,0 +1,20 @@
+---
+
+- name: Fail if required Element settings not defined
+  ansible.builtin.fail:
+    msg: >
+      You need to define a required configuration setting (`{{ item }}`) for using Element.
+  when: "vars[item] == ''"
+  with_items:
+    - "matrix_client_element_default_hs_url"
+
+- name: (Deprecation) Catch and report riot-web variables
+  ansible.builtin.fail:
+    msg: >-
+      Riot has been renamed to Element (https://element.io/blog/welcome-to-element/).
+      The playbook will migrate your existing configuration and data automatically, but you need to adjust variable names.
+      Please change your configuration (vars.yml) to rename all riot-web variables (`{{ item.old }}` -> `{{ item.new }}`).
+      Also note that DNS configuration changes may be necessary.
+  when: "vars | dict2items | selectattr('key', 'match', item.old) | list | items2dict"
+  with_items:
+    - {'old': 'matrix_riot_web_.*', 'new': 'matrix_client_element_.*'}