Fixed support for empty password

- Script was applying -p even if MYSQL_ROOT_PASSWORD wasn't set, causing init to fail

Author: ltangvald

5.5/docker-entrypoint.sh

@@ -52,7 +52,9 @@ if [ "$1" = 'mysqld' ]; then
 			DROP DATABASE IF EXISTS test ;
 			FLUSH PRIVILEGES ;
 		EOSQL
-		mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
+		if [ ! -z "$MYSQL_ROOT_PASSWORD" ]; then
+			mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
+		fi
 
 		if [ "$MYSQL_DATABASE" ]; then
 			echo "CREATE DATABASE IF NOT EXISTS \`$MYSQL_DATABASE\` ;" | "${mysql[@]}"

5.6/docker-entrypoint.sh

@@ -53,7 +53,9 @@ if [ "$1" = 'mysqld' ]; then
 			DROP DATABASE IF EXISTS test ;
 			FLUSH PRIVILEGES ;
 		EOSQL
-		mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
+		if [ ! -z "$MYSQL_ROOT_PASSWORD" ]; then
+			mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
+		fi
 
 		if [ "$MYSQL_DATABASE" ]; then
 			echo "CREATE DATABASE IF NOT EXISTS \`$MYSQL_DATABASE\` ;" | "${mysql[@]}"

5.7/docker-entrypoint.sh

@@ -52,7 +52,9 @@ if [ "$1" = 'mysqld' ]; then
 			DROP DATABASE IF EXISTS test ;
 			FLUSH PRIVILEGES ;
 		EOSQL
-		mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
+		if [ ! -z "$MYSQL_ROOT_PASSWORD" ]; then
+			mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
+		fi
 
 		if [ "$MYSQL_DATABASE" ]; then
 			echo "CREATE DATABASE IF NOT EXISTS \`$MYSQL_DATABASE\` ;" | "${mysql[@]}"