Use MySQL/MariaDB latest versions on macOS.

.github/workflows/build.yml

@@ -38,12 +38,16 @@ jobs:
           # `service mysql restart` fails.
           - {os: ubuntu-20.04, ruby: 2.4, db: mysql80, allow-failure: true}
           - {os: ubuntu-18.04, ruby: 'head', db: '', allow-failure: true}
-          # db: the DB's brew package name in macOS case.
+          # db: A DB's brew package name in macOS case.
+          #     Set a name "db: '[email protected]'" when using an old version.
+          # MariaDB lastet version
           # Allow failure due to the following test failures.
           # https://github.com/brianmario/mysql2/issues/965
-          - {os: macos-latest, ruby: 2.4, db: '[email protected]', allow-failure: true}
-          # Allow failure due to Mysql2::Error: Unknown system variable 'session_track_system_variables'.
-          - {os: macos-latest, ruby: 2.4, db: '[email protected]', allow-failure: true}
+          # https://github.com/brianmario/mysql2/issues/1152
+          - {os: macos-latest, ruby: 2.4, db: mariadb, allow-failure: true}
+          # MySQL latest version
+          # Allow failure due to the issue #1165.
+          - {os: macos-latest, ruby: 2.4, db: mysql, allow-failure: true}
       # On the fail-fast: true, it cancels all in-progress jobs
       # if any matrix job fails unlike Travis fast_finish.
       fail-fast: false

.travis_setup.sh

@@ -85,7 +85,8 @@ if [[ x$OSTYPE =~ ^xdarwin ]]; then
     brew search "${KEYWORD}"
   done
 
-  brew install "$DB" mariadb-connector-c
+  brew info "$DB"
+  brew install "$DB"
   DB_PREFIX="$(brew --prefix "${DB}")"
   export PATH="${DB_PREFIX}/bin:${PATH}"
   export LDFLAGS="-L${DB_PREFIX}/lib"