Upgrade mjolnir (0.1.17 -> 0.1.18) and implement self building

docs/self-building.md

@@ -26,6 +26,7 @@ List of roles where self-building the Docker image is currently possible:
 - `matrix-bridge-mautrix-hangouts`
 - `matrix-bridge-mautrix-telegram`
 - `matrix-bridge-mx-puppet-skype`
+- `matrix-bot-mjolnir`
 
 Adding self-building support to other roles is welcome. Feel free to contribute!
 

group_vars/matrix_servers

@@ -851,6 +851,8 @@ matrix_bot_go_neb_container_http_host_bind_port: "{{ '' if matrix_nginx_proxy_en
 # We don't enable bots by default.
 matrix_bot_mjolnir_enabled: false
 
+matrix_bot_mjolnir_container_image_self_build: "{{ matrix_architecture != 'amd64'}}"
+
 matrix_bot_mjolnir_systemd_required_services_list: |
   {{
     ['docker.service']

roles/matrix-bot-mjolnir/defaults/main.yml

@@ -2,13 +2,20 @@
 # See: https://github.com/matrix-org/mjolnir
 
 matrix_bot_mjolnir_enabled: true
-matrix_bot_mjolnir_version: "v0.1.17"
+
-matrix_bot_mjolnir_docker_image: "{{ matrix_container_global_registry_prefix }}matrixdotorg/mjolnir:{{ matrix_bot_mjolnir_version }}"
+matrix_bot_mjolnir_version: "v0.1.18"
+
+matrix_bot_mjolnir_container_image_self_build: false
+matrix_bot_mjolnir_container_image_self_build_repo: "https://github.com/matrix-org/mjolnir.git"
+
+matrix_bot_mjolnir_docker_image: "{{ matrix_bot_mjolnir_docker_image_name_prefix }}matrixdotorg/mjolnir:{{ matrix_bot_mjolnir_version }}"
+matrix_bot_mjolnir_docker_image_name_prefix: "{{ 'localhost/' if matrix_bot_mjolnir_container_image_self_build else matrix_container_global_registry_prefix }}"
 matrix_bot_mjolnir_docker_image_force_pull: "{{ matrix_bot_mjolnir_docker_image.endswith(':latest') }}"
 
 matrix_bot_mjolnir_base_path: "{{ matrix_base_data_path }}/mjolnir"
 matrix_bot_mjolnir_config_path: "{{ matrix_bot_mjolnir_base_path }}/config"
 matrix_bot_mjolnir_data_path: "{{ matrix_bot_mjolnir_base_path }}/data"
+matrix_bot_mjolnir_docker_src_files_path: "{{ matrix_bot_mjolnir_base_path }}/docker-src"
 
 # A list of extra arguments to pass to the container
 matrix_bot_mjolnir_container_extra_arguments: []

roles/matrix-bot-mjolnir/tasks/init.yml

@@ -1,3 +1,10 @@
+# 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
+  fail:
+    msg: "To self-build the Mjolnir 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_bot_mjolnir_container_image_self_build and matrix_bot_mjolnir_enabled"
+
 - set_fact:
     matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-bot-mjolnir.service'] }}"
   when: matrix_bot_mjolnir_enabled|bool

roles/matrix-bot-mjolnir/tasks/setup_install.yml

@@ -14,14 +14,36 @@
     - { path: "{{ matrix_bot_mjolnir_base_path }}", when: true }
     - { path: "{{ matrix_bot_mjolnir_config_path }}", when: true }
     - { path: "{{ matrix_bot_mjolnir_data_path }}", when: true }
+    - { path: "{{ matrix_bot_mjolnir_docker_src_files_path }}", when: "{{ matrix_bot_mjolnir_container_image_self_build }}" }
   when: "item.when|bool"
 
-- name: Ensure mjolnir image is pulled
+- name: Ensure mjolnir Docker image is pulled
   docker_image:
     name: "{{ matrix_bot_mjolnir_docker_image }}"
     source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
     force_source: "{{ matrix_bot_mjolnir_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_mjolnir_docker_image_force_pull }}"
+  when: "not matrix_bot_mjolnir_container_image_self_build|bool"
+
+- name: Ensure mjolnir repository is present on self-build
+  git:
+    repo: "{{ matrix_bot_mjolnir_container_image_self_build_repo }}"
+    dest: "{{ matrix_bot_mjolnir_docker_src_files_path }}"
+    version: "{{ matrix_bot_mjolnir_docker_image.split(':')[1] }}"
+    force: "yes"
+  register: matrix_bot_mjolnir_git_pull_results
+  when: "matrix_bot_mjolnir_container_image_self_build|bool"
+
+- name: Ensure mjolnir Docker image is built
+  docker_image:
+    name: "{{ matrix_bot_mjolnir_docker_image }}"
+    source: build
+    force_source: "{{ matrix_bot_mjolnir_git_pull_results.changed }}"
+    build:
+      dockerfile: Dockerfile
+      path: "{{ matrix_bot_mjolnir_docker_src_files_path }}"
+      pull: yes
+  when: "matrix_bot_mjolnir_container_image_self_build|bool"
 
 - name: Ensure matrix-bot-mjolnir config installed
   copy: