Bash script to trace png to svg, using imagemagick and potrace

png-to-svg.sh

#!/bin/bash

function print_params() {
    echo "Usage: png-to-svg.sh <path-to-png>"
    echo
}

# OS X - install pre-requisites
if [ ! -x "$(command -v magick)" ]; then  
    brew install imagemagick
fi
if [ ! -x "$(command -v potrace)" ]; then  
    brew install potrace
fi

if [ ! -f "$1" ]; then
    echo "Please provide a path to a valid png file."
    echo
    print_params
    exit 1
fi

PNG_FILE=$1
BMP_FILE=$(dirname $PNG_FILE)/$(basename $PNG_FILE).bmp
SVG_FILE=$(dirname $PNG_FILE)/$(basename $PNG_FILE).svg

echo "Input source PNG: $PNG_FILE"
echo "Intermediate BMP: $BMP_FILE"
echo "Output SVG:       $SVG_FILE"

echo
magick identify $PNG_FILE

# convert to bmp
magick $PNG_FILE -resize '1280x1280' $BMP_FILE
magick identify $BMP_FILE

# trace the BMP to SVG
potrace -t 5 --svg -o $SVG_FILE $BMP_FILE
magick identify $SVG_FILE