move databases option to script args

_config.sh

@@ -1,3 +1,2 @@
 #!/bin/bash
 log_file=replication.log
-databases=( 'database_one' 'another_database' )

start-replication.sh

@@ -6,6 +6,33 @@ set -a
 . "${CONFIG_FILE}"
 set +a
 
+readopt='getopts $opts opt;rc=$?;[ $rc$opt == 0? ]&&exit 1;[ $rc == 0 ]||{ shift $[OPTIND-1];false; }'
+
+opts=vfdo:
+
+# Enumerating options
+#while eval $readopt
+#do
+#    echo OPT:$opt ${OPTARG+OPTARG:$OPTARG}
+#done
+
+# Enumerating arguments
+databases=( )
+
+for arg
+do
+    databases=( $databases $arg )
+done
+
+if [[ -z "$databases" ]]; then
+    cat <<EOF
+Usage: $0 database_one [...database_two]
+EOF
+    exit
+fi
+
+echo "Set replication databases to: ${databases[@]}"
+
 for i in ${databases[@]}
 do
     REMOTE_SQL=$REMOTE_SQL' USE '$i'; FLUSH TABLES WITH READ LOCK;'