iOS icons automate generator

genicons.sh

#!/bin/bash

f=$(pwd)

sips --resampleWidth 512 "${f}/${1}" --out "${f}/iTunesArtwork"
sips --resampleWidth 1024 "${f}/${1}" --out "${f}/iTunesArtwork@2x"

sips --resampleWidth 29 "${f}/${1}" --out "${f}/${2}-29.png"
sips --resampleWidth 58 "${f}/${1}" --out "${f}/${2}-29@2x.png"
sips --resampleWidth 87 "${f}/${1}" --out "${f}/${2}-29@3x.png"

sips --resampleWidth 40 "${f}/${1}" --out "${f}/${2}-40.png"
sips --resampleWidth 80 "${f}/${1}" --out "${f}/${2}-40@2x.png"
sips --resampleWidth 120 "${f}/${1}" --out "${f}/${2}-40@3x.png"

sips --resampleWidth 120 "${f}/${1}" --out "${f}/${2}-60@2x.png"
sips --resampleWidth 180 "${f}/${1}" --out "${f}/${2}-60@3x.png"

sips --resampleWidth 76 "${f}/${1}" --out "${f}/${2}-76.png"
sips --resampleWidth 152 "${f}/${1}" --out "${f}/${2}-76@2x.png"

sips --resampleWidth 167 "${f}/${1}" --out "${f}/${2}-83.5@2x.png"

sips --resampleWidth 48 "${f}/${1}" --out "${f}/${2}-24@2x.png"

sips --resampleWidth 55 "${f}/${1}" --out "${f}/${2}-27.5@2x.png"

sips --resampleWidth 88 "${f}/${1}" --out "${f}/${2}-44@2x.png"

sips --resampleWidth 172 "${f}/${1}" --out "${f}/${2}-86@2x.png"

sips --resampleWidth 196 "${f}/${1}" --out "${f}/${2}-98@2x.png"

Usage:
genicon.sh inputfile.png nameprefix
Input file should be at least 1024 pixels width and height