Resize big icon to make iOS 7+ icon set

resize_ios_icons.sh

#!/bin/sh

# Generate icons for >= iOS 7
#
# Install 
# curl -o /usr/local/bin/resize_ios_icons -O https://gist.githubusercontent.com/Just-/8fa383eb690ac6dd0601/raw/36d49d9c2deda6844776abbaf0da127759176d2c/resize_ios_icons.sh && chmod +x /usr/local/bin/resize_ios_icons
#
# Params: 1 - icon to resize (fe 512px or 1024px)
#         2 - dir to generate
#

GENERATED_DIR="${2:-generated-resources}"

mkdir ${GENERATED_DIR}

sips $1 -Z 29  -o  ${GENERATED_DIR}/settings.png
sips $1 -Z 58  -o  ${GENERATED_DIR}/settings@2x.png
sips $1 -Z 87  -o  ${GENERATED_DIR}/settings@3x.png

sips $1 -Z 40  -o  ${GENERATED_DIR}/spotlight.png
sips $1 -Z 80  -o  ${GENERATED_DIR}/spotlight@2x.png
sips $1 -Z 120 -o  ${GENERATED_DIR}/spotlight@3x.png

sips $1 -Z 60  -o  ${GENERATED_DIR}/iPhone.png
sips $1 -Z 120 -o  ${GENERATED_DIR}/iPhone@2x.png
sips $1 -Z 180 -o  ${GENERATED_DIR}/iPhone@3x.png

sips $1 -Z 76  -o  ${GENERATED_DIR}/iPad.png
sips $1 -Z 152 -o  ${GENERATED_DIR}/iPad@2x.png
sips $1 -Z 167 -o  ${GENERATED_DIR}/iPadPro@2x.png

sips $1 -Z 48  -o  ${GENERATED_DIR}/AppIcon24x24@2x.png
sips $1 -Z 55  -o  ${GENERATED_DIR}/AppIcon27.5x27.5@2x.png
sips $1 -Z 58  -o  ${GENERATED_DIR}/AppIcon29x29@2x.png
sips $1 -Z 87  -o  ${GENERATED_DIR}/AppIcon29x29@3x.png
sips $1 -Z 80  -o  ${GENERATED_DIR}/AppIcon40x40@3x.png
sips $1 -Z 88  -o  ${GENERATED_DIR}/AppIcon44x44@2x.png
sips $1 -Z 172  -o  ${GENERATED_DIR}/AppIcon86x86@2x.png
sips $1 -Z 196  -o  ${GENERATED_DIR}/AppIcon98x98@2x.png