base64url: wrapper script for base64

base64url

#!/usr/bin/env bash
# Source: https://gist.github.com/lionello/6bb597fc600932c6c737aab3b402147c

ignore=0
decode=0
dashdash=0
args=()
files=()

while [ $# -gt 0 ]; do
    if [ $dashdash -eq 1 ]; then
        files+=("$1")
    else
        case $1 in
            -D|-d|--decode)          #decode data
            decode=1
            ;;
            -i|--ignore-garbage)  #when decoding, ignore non-alphabet characters
            ignore=1
            ;;
            --help)
            base64 --help | sed 's/\(Usage:.base64\)/\1url/'
            exit 0
            ;;
            --)
            dashdash=1
            ;;
            -*)
            args+=("$1")
            ;;
            -|*)
            files+=("$1")
            ;;
        esac
    fi
    shift
done

if [ $decode -eq 0 ]; then
    base64 "${args[@]}" -- "${files[@]}" | sed 's!\+!-!g;s!/!_!g;s!=*$!!g'
elif [ $ignore -eq 1 ]; then
    sed 's!-!\+!g;s!_!/!g' "${files[@]}" | base64 --decode -i "${args[@]}" 2> /dev/null
else
    sed 's!-!\+!g;s!_!/!g' "${files[@]}" | base64 --decode "${args[@]}"
fi