Options separated by spaces #
This is the more flexible approach, where the option can easily be followed by an arbitrary number of items to take in and be shifted pass by.
#!/usr/bin/env bash
while [[ $# -gt 0 ]]
do
key="$1"
case $key in
-e|--extension)
EXTENSION="$2"
shift # past argument
shift # past value
;;
--default)
DEFAULT=YES
shift # past argument
;;
*) # unknown option
shift # past argument
;;
esac
done
echo FILE EXTENSION = "${EXTENSION}"
Options separated by ‘=’ #
This is to say, command line options can be done like so -l=blah --lib=blah.
This is a bit less flexible, as each item would have to be paired with the explicit optin tag. But some do still prefer it.
#!/usr/bin/env bash
for i in "$@"
do
case $i in
-e=*|--extension=*)
EXTENSION="${i#*=}"
shift # past argument=value
;;
--default)
DEFAULT=YES
shift # past argument with no value
;;
*)
# unknown option
;;
esac
done
echo "FILE EXTENSION = ${EXTENSION}"