Bash Scripting with Parameters Argument parsing using a for loop
Example
A simple example which provides the options:
| Opt | Alt. Opt | Details |
|---|---|---|
-h | --help | Show help |
-v | --version | Show version info |
-dr path | --doc-root path | An option which takes a secondary parameter (a path) |
-i | --install | A boolean option (true/false) |
-* | -- | Invalid option |
#!/bin/bash
dr=''
install=false
skip=false
for op in "$@";do
if $skip;then skip=false;continue;fi
case "$op" in
-v|--version)
echo "$ver_info"
shift
exit 0
;;
-h|--help)
echo "$help"
shift
exit 0
;;
-dr|--doc-root)
shift
if [[ "$1" != "" ]]; then
dr="${1/%\//}"
shift
skip=true
else
echo "E: Arg missing for -dr option"
exit 1
fi
;;
-i|--install)
install=true
shift
;;
-*)
echo "E: Invalid option: $1"
shift
exit 1
;;
esac
done
