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getopts parsing arguments script

Jose Herrera answered on December 23, 2022 Popularity 2/10 Helpfulness 1/10

answer getopts parsing arguments script

getopts parsing arguments script

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# outer loop to allow processing option arguments at the end
while test ! $# -eq 0; do
    # getopts loop, here you define the short options: 
    # h for -h, l: for -l <lang>. -: provides support for long-options.
    while getopts -- hl:-: arg "$@"; do
        case $arg in
            h ) ARG_HELP=true ;;
            l ) ARG_LANG="$OPTARG" ;;
            - ) LONG_OPTARG="${OPTARG#*=}"
                case "$OPTARG" in
                    help    ) ARG_HELP=true;;
                    lang=?* ) ARG_LANG="$LONG_OPTARG" ;;
                    # FIXME: using the same option twice (either both
                    # after the argument or both before it) gives the
                    # first, not the second value
                    lang*   ) ARG_LANG="${@:$OPTIND:1}" ; OPTIND=$(($OPTIND + 1));;
                    vcs=?*  ) ARG_VCS="$LONG_OPTARG" ;;
                    vcs*    ) ARG_VCS="${@:$OPTIND:1}" ; OPTIND=$(($OPTIND + 1));;
                    '' )      break ;; # "--" terminates argument
                                       # processing to allow giving
                                       # options for autogen.sh after
                                       # --
                    * )       echo "Illegal option --$OPTARG" >&2; exit 2;;
                esac;;
            \? ) exit 2 ;;  # getopts already reported the illegal
                            # option
        esac
    done
    shift $((OPTIND-1)) # remove parsed options and args from $@ list
    # reinitialize OPTIND to allow parsing again
    OPTIND=1
    # provide help output.
    if test x"${ARG_HELP}" = x"true"; then
        echo "${PROG} new [-h | --help] [-l | --lang <LANGUAGE>] [--vcs <VCS>] PROJECT_NAME"
        exit 0
    fi
    # get the argument
    if test x"${1}" = x"--"; then
        if test x"${PROJ}" = x""; then
            echo "Missing project name." >&2; exit 2
        else
            # nothing more to parse.
            # Remove -- from the remaining arguments
            shift 1
            break
        fi
    fi
    if test ! x"${1}" = x""; then
        PROJ="${1%/}" # without trailing slash
    fi
    # remove the argument, then continue the loop to allow putting
    # the options after the argument
    shift 1
done

Popularity 2/10 Helpfulness 1/10 Language shell

Source: www.draketo.de

Tags: arguments getopts parsing script shell

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Contributed on Dec 23 2022

Jose Herrera

0 Answers Avg Quality 2/10

getopts parsing arguments script

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