Fix self-building for matrix-ma1sd on non-version tag/branch

Building `master` or something like this was failing.

roles/matrix-ma1sd/defaults/main.yml

@@ -5,10 +5,13 @@ matrix_ma1sd_enabled: true
 
 matrix_ma1sd_container_image_self_build: false
 matrix_ma1sd_container_image_self_build_repo: "https://github.com/ma1uta/ma1sd.git"
+matrix_ma1sd_container_image_self_build_branch: "{{ matrix_ma1sd_version }}"
 
 matrix_ma1sd_architecture: "amd64"
 
-matrix_ma1sd_docker_image: "{{ matrix_ma1sd_docker_image_name_prefix }}ma1uta/ma1sd:2.4.0-{{ matrix_ma1sd_architecture }}"
+matrix_ma1sd_version: "2.4.0"
+
+matrix_ma1sd_docker_image: "{{ matrix_ma1sd_docker_image_name_prefix }}ma1uta/ma1sd:{{ matrix_ma1sd_version }}-{{ matrix_ma1sd_architecture }}"
 matrix_ma1sd_docker_image_name_prefix: "{{ 'localhost/' if matrix_ma1sd_container_image_self_build else 'docker.io/' }}"
 matrix_ma1sd_docker_image_force_pull: "{{ matrix_ma1sd_docker_image.endswith(':latest') }}"
 

roles/matrix-ma1sd/tasks/setup_install.yml

@@ -79,7 +79,7 @@
     git:
       repo: "{{ matrix_ma1sd_container_image_self_build_repo }}"
       dest: "{{ matrix_ma1sd_docker_src_files_path }}"
-      version: "{{ matrix_ma1sd_docker_image.split(':')[1].split('-')[0] }}"
+      version: "{{ matrix_ma1sd_container_image_self_build_branch }}"
       force: "yes"
     register: matrix_ma1sd_git_pull_results
 
@@ -90,10 +90,13 @@
 
   - name: Ensure ma1sd Docker image is tagged correctly
     docker_image:
-      # The build script always tags the image with something like `ma1uta/ma1sd:2.4.0`.
-      # Remove the `-{{ matrix_ma1sd_architecture }}` suffix and our `localhost/` prefix (applied when self-building)
-      # to get to what has actually been built, so we can retag it as `{{ matrix_ma1sd_docker_image }}`.
-      name: "{{ matrix_ma1sd_docker_image.split('-')[0].replace('localhost/', '') }}"
+      # The build script always tags the image with 2 tags:
+      # - based on the branch/version: e.g. `ma1uta/ma1sd:2.4.0` (when on `2.4.0`)
+      #   or `ma1uta/ma1sd:2.4.0-19-ga71d32b` (when on a given commit for a pre-release)
+      # - generic one: `ma1uta/ma1sd:latest-dev`
+      #
+      # It's hard to predict the first one, so we'll use the latter.
+      name: "ma1uta/ma1sd:latest-dev"
       repository: "{{ matrix_ma1sd_docker_image }}"
       force_tag: yes
       source: local