travis: support MariaDB 5.5

.travis.yml

@@ -6,6 +6,7 @@ language: cpp
 env:
 #  - MYSQL_VERSION=system
   - MYSQL_VERSION=5.5.27
+  - MYSQL_TYPE=mariadb MYSQL_VERSION=5.5.25
 install:
   - echo "deb http://packages.groonga.org/ubuntu/ $(lsb_release --short --codename) universe" | sudo tee /etc/apt/sources.list.d/groonga.list
   - echo "deb-src http://packages.groonga.org/ubuntu/ $(lsb_release --short --codename) universe" | sudo tee --append /etc/apt/sources.list.d/groonga.list

tools/travis_before_script.sh

@@ -18,9 +18,15 @@ if [ "$MYSQL_VERSION" = "system" ]; then
     cd ..
 else
     sudo apt-get -y install cmake
-    wget http://cdn.mysql.com/Downloads/MySQL-5.5/mysql-${MYSQL_VERSION}.tar.gz
-    tar xzf mysql-${MYSQL_VERSION}.tar.gz
-    ln -s mysql-${MYSQL_VERSION} mysql
+    if [ "$MYSQL_TYPE" = "mariadb" ]; then
+	http://mirror3.layerjet.com/mariadb/mariadb-${MYSQL_VERSION}/kvm-tarbake-jaunty-x86/mariadb-${MYSQL_VERSION}.tar.gz
+	tar xzf mariadb-${MYSQL_VERSION}.tar.gz
+	ln -s mariadb-${MYSQL_VERSION} mysql
+    else
+	wget http://cdn.mysql.com/Downloads/MySQL-5.5/mysql-${MYSQL_VERSION}.tar.gz
+	tar xzf mysql-${MYSQL_VERSION}.tar.gz
+	ln -s mysql-${MYSQL_VERSION} mysql
+    fi
     cd mysql
     BUILD/compile-amd64-max
     cd ..