svg2icons.sh

#!/usr/bin/env bash
function finish {
    echo "I am complete."
}
trap finish EXIT
function rekt {
    echo "Canceled."
    exit
}
trap rekt SIGINT


shopt -s nullglob

declare path
declare sizes
declare outdir
declare options="${@}"

for opt in "${@}"; do
    if [[ "${options[*]}" =~ '-help' ]]; then
        cat <<-EOF
Usage:
  sv2icons -path <FILE_PATH> -sizes <INT1,INT2,...,INTN> -scales <INT1,INT2,...,INTN> -outdir <PATH_OUT>
EOF
        exit 0
    fi
    if [[ "${opt}" == '-path' ]]; then
        shift
        path="${1:?}"
        shift
    elif [[ "${opt}" == '-sizes' ]]; then
        shift
        sizes="${1:?}"
        shift
    elif [[ "${opt}" == '-scales' ]]; then
        shift
        scales="${1:?}"
        shift
    elif [[ "${opt}" == '-outdir' ]]; then
        shift
        outdir="${1:?}"
        shift
    fi
done
# icon-29@2x

echo "${outdir:?}" @> /dev/null
echo "${sizes:?}" @> /dev/null

[[ ! -d "${outdir}" ]] && mkdir -p "${outdir}"

#echo $*
IFS=','
for size in ${sizes[@]}; do
    name="icon-${size}"
    for scale in ${scales[@]}; do
        reSize=$(( size * scale ))
        if [[ "${scale}" -eq 1 ]]; then
            printf -v scaledname '%s.png' "${name}"
        else
            printf -v scaledname '%s@%sx.png' "${name}" "${scale}"
        fi
        printf 'Making %s ... ' "${scaledname}"
        convert -resize "${reSize}" \
                -density 400 \
                "${path}" \
                "${outdir}/${scaledname}" &
        wait
        printf 'done\n'
    done
done