Bash script to resize ios icons for cordova project (personal usage)

resize.sh

#!/usr/bin/env bash
# usage: sh resize.sh [PATH_TO_ICON_FOLDER] 
export MAGICK_HOME="$HOME/opt/ImageMagick-7.0.8"
export DYLD_LIBRARY_PATH="$MAGICK_HOME/lib/"
src=$1
originfilepath="${src}/180x180.png"
sizes=('20' '29' '40' '50' '57' '60' '58' '80' '72' '76' '87' '100' '114' '120' '144' '152' '167' '180' '1024')

if test -f ${originfilepath}; then
    for s in ${sizes[@]}; do
        filepath="${src}/${s}x${s}.png"

        if test -f ${filepath}; then
            echo "Ignored. File exist: ${filepath}"
        else
            echo "Generate file: ${filepath}"
            cmd="convert ${originfilepath} -resize ${s}x${s} ${filepath}"
            echo "\t execute cmd: ${cmd}"
            $(${cmd})
        fi
    done
else
    echo "Original image file does not exist"
fi