Get require and optional argument in bash script - bash

Question

Sorry for my newbie question, I'm confused!
I want to make a bash script for some reasons.
I need to pass some arguments when running the script.
for example:
script.sh build --with-test --without-test2 --with-test3
script.sh config
script.sh config --with-test3 --without-test2
script.sh config --add this is a test
build or config is required and also other parameters are optional and the order of using argument is not important.
I wrote this code:
if [[ $# -lt 1 ]]; then
printf "build or config parameter is missing"
exit;
fi
while [[ $# -gt 0 ]]
do
key="$1"
case $key in
build )
mode=1
shift
shift
;;
config )
mode=0
shift
shift
;;
-wt2 | --without-test2 )
wt2=0
shift
shift
;;
-wt3 | --with-test3 )
wt3=1
shift
shift
;;
-wt0 | --with-test )
wt0=1
shift
shift
;;
-add | --additional )
additional_command=$2
shift
shift
;;
-h | --help )
help
shift
shift
exit
;;
*)
echo "Missing parameter."
shift
shift
exit
;;
esac
done
But my code does not work properly, the script will run even without build and config, I cannot figure out how can I write my if statements

Answer 1

The use of shift twice is a mistake. You can confirm that config AND/OR build has been specified by checking the value of mode. There also looks to be an issue with additional command.
Consider moving the shift statement.
I've added some debug to your program to see what the results are:
$ script.sh --with-test --without-test2 --with-test3
additional_command=
mode=
wt0=1
wt2=
wt3=1
As you can see, the wt2 is not set, even though --without-test2 was specified.
Here's how you can fix things up a little:
Remove the shifts in the case (except for special processing)
Review the mode parameter to see if it is set ( test -z )
Code follows:
#!/bin/bash
if [[ $# -lt 1 ]]; then
printf "build or config parameter is missing"
exit;
fi
while [[ $# -gt 0 ]]
do
key="$1"
shift
case $key in
build )
mode=1
;;
config )
mode=0
;;
-wt2 | --without-test2 )
wt2=0
;;
-wt3 | --with-test3 )
wt3=1
;;
-wt0 | --with-test )
wt0=1
;;
-add | --additional )
# Get the rest of the parameters, right?
additional_command=$*
shift $# # Shift to "deplete" the rest of the params
;;
-h | --help )
help
# No need to shift if you are exiting
exit
;;
*)
echo "Missing parameter."
# No need to shift if you are exiting
exit
;;
esac
done
#Here's a little debug code that you can remove or just comment out with :
#Change first line to : cat <<EOF if you want to comment out.
cat <<EOF
additional_command=$additional_command
mode=$mode
wt0=$wt0
wt2=$wt2
wt3=$wt3
EOF
if [ -z "$mode" ] ; then
echo "Missing config or build parameter"
fi