Custom MySQL 5.7 installation.

Author: noplanman

.travis.yml

@@ -1,10 +1,6 @@
-dist: xenial
 sudo: required
 language: php
 
-addons:
-    mariadb: '10.1'
-
 cache:
     directories:
         - $HOME/.composer/cache
@@ -28,6 +24,12 @@ git:
     depth: 1
 
 install:
+    - echo mysql-apt-config mysql-apt-config/select-server select mysql-5.7 | sudo debconf-set-selections
+    - wget http://dev.mysql.com/get/mysql-apt-config_0.7.3-1_all.deb
+    - sudo dpkg --install mysql-apt-config_0.7.3-1_all.deb
+    - sudo apt-get update -q
+    - sudo apt-get install -q -y -o Dpkg::Options::=--force-confnew mysql-server
+    - sudo mysql_upgrade
     - if [ "$deps" == "low" ]; then travis_retry composer update --prefer-source --prefer-lowest --prefer-stable --no-interaction; fi
     - if [ "$deps" != "low" ]; then travis_retry composer install --prefer-source --no-interaction; fi