[WIP] Generates .icns package for Mac from one 1024x1024 PNG file.

generate-icns.sh

#!/bin/bash

# Converts a single 1024px PNG image to a .ICNS file for best use with Mac applications
# Required: Icon to be converted must be on the desktop and named "icon2convert"

echo ""
ls ~/Desktop/*.png
echo ""
echo "Icons to be converted must be on the desktop."
echo "Which icon would you like to convert?"
read ICON_NAME

echo "Okay, converting $ICON_NAME to .icns."

# Name each folder for the date/time of its creation
NAME=icon-$(date +%Y/%m/%d-%T).iconset
DIR="~/Desktop/$NAME"

for i in `seq 1 3`;
    do
            echo "$i..."
            sleep 1
    done
    echo "Converting."
    cp ~/Desktop/$ICON_NAME ~/Desktop/icon2convert.png

mkdir $DIR

sips -z 16 16     ~/Desktop/icon2convert.png --out $DIR/icon_16x16.png
sips -z 32 32     ~/Desktop/icon2convert.png --out $DIR/[email protected]
sips -z 32 32     ~/Desktop/icon2convert.png --out $DIR/icon_32x32.png
sips -z 64 64     ~/Desktop/icon2convert.png --out $DIR/[email protected]
sips -z 128 128   ~/Desktop/icon2convert.png --out $DIR/icon_128x128.png
sips -z 256 256   ~/Desktop/icon2convert.png --out $DIR/[email protected]
sips -z 256 256   ~/Desktop/icon2convert.png --out $DIR/icon_256x256.png
sips -z 512 512   ~/Desktop/icon2convert.png --out $DIR/[email protected]
sips -z 512 512   ~/Desktop/icon2convert.png --out $DIR/icon_512x512.png
cp icon2convert.png $DIR/[email protected]
iconutil -c icns $DIR
rm -R $DIR