linux args example

linux_args_example.sh

# v1 ------------------------------------------
cleanup=0
build_type="Debug"
cmake_gen="Ninja"

pos_args=()
show_usage() {
    echo "Usage: build.sh [-c (Cleanup)] [-r (Release)] [-g (Generator xxx)]"
}
while [[ $# -gt 0 ]]; do
  case $1 in
    -c|--cleanup)
        cleanup=1; shift;;
    -r|--release)
        build_type="Release"; shift;;
    -g|--cmakegen)
        cmake_gen="$2"; shift; shift;;
    -*|--*)
        show_usage; exit 1;;
    *)
      pos_args+=("$1"); shift;;
  esac
done


# v2 -----------------------------------------------

cleanup=0
build_type="Debug"
cmake_gen="Ninja"

pos_args=()
show_usage() {
    echo "Usage: build.sh [-c (Cleanup)] [-r (Release)] [-g (Generator xxx)]"
    exit 1
}
while [[ $# -gt 0 ]]; do
  case $1 in
    -c|--cleanup)
        cleanup=1; shift;;
    -r|--release)
        build_type="Release"; shift;;
    -g|--cmakegen)
        cmake_gen="$2"; shift; shift;;
    *|-*|--*)
        show_usage;;
  esac
done