Parse Command Line Arguments

flags.sh

#!/usr/bin/env bash

stripslashes() {
    echo $1 | sed 's/-*//'
}

parseobj() {
    RESULT=""
    COUNT=1
    LENGTH=$(echo $1 | grep -o ";" | wc -l)
    LENGTH=$(( $LENGTH + 1 ))
    while [[ $COUNT -le $LENGTH ]]; do
        PAIR=$(echo $1 | cut -d ";" -f $COUNT)
        KEY=$(echo $PAIR | cut -d ":" -f 1)
        if [[ $KEY == $2 ]]; then
            RESULT=$(echo $PAIR | cut -d ":" -f 2)
            break;
        fi
        COUNT=$(( $COUNT + 1 ))
    done    
    echo $RESULT
}

getflags() {
    FL_COMMAND=""
    FL_FLAGS=""
    FL_PARAMS=""
    while [ $# -gt 0 ]; do
        case "$1" in
            -*) STRIPPED=$(stripslashes "$1")
                if [[ -n $FL_FLAG ]]; then
                    FL_FLAGS="$FL_FLAGS;$FL_FLAG:true"
                fi
                FL_FLAG=$STRIPPED
            shift;
            ;;
            *) 
            if [[ -n $FL_FLAG ]]; then
                if [[ -z $FL_FLAGS ]]; then
                    FL_FLAGS="$FL_FLAG:$1"
                else
                    FL_FLAGS="$FL_FLAGS;$FL_FLAG:$1"
                fi
                FL_FLAG=""
            else 
                FL_PARAMS="$FL_PARAMS $1"
            fi 
            shift;
            ;;
        esac
    done

    if [[ -n $FL_FLAG ]]; then
        FL_FLAGS="$FL_FLAGS;$FL_FLAG=true"
        FL_FLAG=""
    fi
    export FL_PARAMS=$FL_PARAMS
    eval set -- "$FL_PARAMS"
    export FL_FLAGS="$FL_FLAGS"
}

if [[ $1 == "set" || $1 == "reset" ]]; then
    shift;
    getflags $@
    export FL_PARAMS=$FL_PARAMS
    eval set -- "$FL_PARAMS"
    export FL_FLAGS="$FL_FLAGS"
elif [[ -z $FL_PARAMS ]]; then
    getflags $@
    export FL_PARAMS=$FL_PARAMS
    eval set -- "$FL_PARAMS"
    export FL_FLAGS="$FL_FLAGS"
fi

if [[ $1 == "get" ]]; then
    shift;
    FLAG_KEY=$1
    shift;
    echo $(parseobj $FL_FLAGS $FLAG_KEY)
elif [[ $1 == "test"]]; then
    shift;
    if [[ -z $1 ]]; then
        if [[ -n $FL_FLAGS ]]; then
            echo "FLAGS: $FL_FLAGS"
        else 
            echo "FLAGS: none"
        fi
        if [[ -n $FL_PARAMS ]]; then
            echo "PARAMS: $FL_PARAMS"
        else
            echo "PARAMS: none"
        fi
    else
    fi
fi