[settings] create parent settings file directory

bashopts.sh

@@ -661,6 +661,8 @@ bashopts_process_option() {
         if [ -n "$bashopts_tool_settings_path" ]; then
             # vrite the value to the setting file
             (
+                test -d "$(dirname $bashopts_tool_settings_path)" || \
+                    mkdir -p "$(dirname $bashopts_tool_settings_path)"
                 if [ -f "$bashopts_tool_settings_path" ]; then
                     # remove old value
                     sed -i "/^$op=/d" $bashopts_tool_settings_path

test.sh

@@ -163,7 +163,7 @@ _test_case_10() {
 }
 
 _test_case_11() {
-    bashopts_setup -n "$0" -d "Test case $0" -s /this/is/an/inacessible/file
+    bashopts_setup -n "$0" -d "Test case $0" -s /dev/null/invalid
 
     bashopts_declare -n simple_val -s -l value -d "Simple value" -t string -v 'val'