ci: add MySQL 8.4 test lane

compose.yaml

@@ -1,3 +1,25 @@
+x-ci: &ci
+  build:
+    context: .
+    dockerfile: .docker/ci/Dockerfile
+  command:
+    - /bin/bash
+    - -lc
+    - |
+      set -euo pipefail
+      php --version
+      composer --version
+      node --version
+      moodle-plugin-ci --version
+      moodle-plugin-ci install --plugin /plugin --branch v5.2.2 --db-host "$$DB_HOST"
+      test "$$(git -C /workspace/moodle rev-parse HEAD)" = "acfa383c13dd46c83ca82894a8e95fac273fda33"
+      moodle-plugin-ci phplint
+      moodle-plugin-ci phpcs --max-warnings 0
+      moodle-plugin-ci phpdoc --max-warnings 0
+      moodle-plugin-ci validate
+      moodle-plugin-ci savepoints
+      moodle-plugin-ci phpunit --fail-on-warning
+
 services:
   postgres:
     image: postgres:16.13-alpine3.22@sha256:caf536ebd910e85473a9f5e2fd1aea360c965c4a911c8555ac1f61b2102006cb
@@ -12,10 +34,22 @@ services:
     tmpfs:
       - /var/lib/postgresql/data
 
+  mysql:
+    profiles:
+      - mysql
+    image: mysql:8.4.11@sha256:b3b90af2a6552ae30c266fdb7d5dd55f3afb72404bb78d37fe8a23eb857fd3fb
+    environment:
+      MYSQL_ROOT_PASSWORD: moodle_ci
+    healthcheck:
+      test: ["CMD-SHELL", "mysql --protocol=TCP --host=127.0.0.1 --user=root --password=$$MYSQL_ROOT_PASSWORD --execute='SELECT 1' --silent"]
+      interval: 2s
+      timeout: 5s
+      retries: 30
+    tmpfs:
+      - /var/lib/mysql
+
   ci:
-    build:
-      context: .
-      dockerfile: .docker/ci/Dockerfile
+    <<: *ci
     depends_on:
       postgres:
         condition: service_healthy
@@ -25,20 +59,18 @@ services:
       DB_USER: postgres
       MOODLE_BRANCH: v5.2.2
       NPM_CONFIG_FETCH_RETRIES: 5
-    command:
-      - /bin/bash
-      - -lc
-      - |
-        set -euo pipefail
-        php --version
-        composer --version
-        node --version
-        moodle-plugin-ci --version
-        moodle-plugin-ci install --plugin /plugin --branch v5.2.2 --db-host postgres
-        test "$$(git -C /workspace/moodle rev-parse HEAD)" = "acfa383c13dd46c83ca82894a8e95fac273fda33"
-        moodle-plugin-ci phplint
-        moodle-plugin-ci phpcs --max-warnings 0
-        moodle-plugin-ci phpdoc --max-warnings 0
-        moodle-plugin-ci validate
-        moodle-plugin-ci savepoints
-        moodle-plugin-ci phpunit --fail-on-warning
+
+  ci-mysql:
+    <<: *ci
+    profiles:
+      - mysql
+    depends_on:
+      mysql:
+        condition: service_healthy
+    environment:
+      DB: mysqli
+      DB_HOST: mysql
+      DB_PASS: moodle_ci
+      DB_USER: root
+      MOODLE_BRANCH: v5.2.2
+      NPM_CONFIG_FETCH_RETRIES: 5