batch convert HEIC images to PNG with WSL2 and ImageMagick

HEIC_to_PNG.sh

#!/bin/bash

: ' Setup
Put script in dir with HEIC images

Install imagemagick: sudo apt install imagemagick

Allow larger cache
	- sudo nano /etc/ImageMagick-6/policy.xml
	- change <policy domain="resource" name="disk" value="1GiB"/>
	  to <policy domain="resource" name="disk" value="8GiB"/>
'

output_dir="heic_to_png"
if [ ! -d "$output_dir" ]
then
	mkdir $output_dir
	echo "Created output directory"
else
	echo "Output directory already exists."
	echo "Please remove or rename it."
	exit 1
fi

files=($(pwd)/"*.HEIC")
regex="\/([^\/]+).HEIC"
for file in $files
do
	if [[ $file =~ $regex ]]
	then
		name="${BASH_REMATCH[1]}.png"
		echo $name
		convert "$file" -quality 50 "$output_dir/$name"
	else
		echo "unable to parse $file"
	fi
done