This bash script creates icon of all the required sizes for OS X | iOS | Android

scaleK

#!/bin/bash

inputFile=$1
directoryName=$2

[ $# -ne 2 ] && echo "Arguments improper. scaleK image.png outputdirectory " && exit
[ ! -f $inputFile ] && echo "File not found!" && exit;

sizeArrayMac=('16' '32' '128' '256' '512')
sizeArrayiOS=('29' '40' '60')

mkdir -p "${directoryName}/mac"
mkdir -p "${directoryName}/iOS"

# Make images for Mac
for size in ${sizeArrayMac[@]}; do
	a="${directoryName}/mac/${size}x${size}.png"
	b="${directoryName}/mac/${size}x${size}@2x.png"
	sips -Z ${size} ${inputFile} -o ${a}
	sips -Z $[size*2] ${inputFile} -o ${b}
done

#Make images for iOS
for size in ${sizeArrayiOS[@]}; do
    a="${directoryName}/iOS/${size}x${size}.png"
    b="${directoryName}/iOS/${size}x${size}@2x.png"
    c="${directoryName}/iOS/${size}x${size}@3x.png"
    sips -Z ${size} ${inputFile} -o ${a}
    sips -Z $[size*2] ${inputFile} -o ${b}
    sips -Z $[size*3] ${inputFile} -o ${c}
done

# Make for android
mkdir -p "${directoryName}/res/mipmap-hdpi"
mkdir -p "${directoryName}/res/mipmap-mdpi"
mkdir -p "${directoryName}/res/mipmap-xhdpi"
mkdir -p "${directoryName}/res/mipmap-xxhdpi"
mkdir -p "${directoryName}/res/mipmap-xxxhdpi"

sips -Z 72 ${inputFile} -o "${directoryName}/res/mipmap-hdpi/ic_launcher.png"
sips -Z 48 ${inputFile} -o "${directoryName}/res/mipmap-mdpi/ic_launcher.png"
sips -Z 96 ${inputFile} -o "${directoryName}/res/mipmap-xhdpi/ic_launcher.png"
sips -Z 144 ${inputFile} -o "${directoryName}/res/mipmap-xxhdpi/ic_launcher.png"
sips -Z 192 ${inputFile} -o "${directoryName}/res/mipmap-xxxhdpi/ic_launcher.png"


echo -e "Done"