python-icon-icns.sh

#!/usr/bin/env bash

# -----------------------------------------------------------------------------
# 1. Download SVG

if [ ! -f logo.svg ]; then
    curl https://www.python.org/static/community_logos/python-logo-inkscape.svg > logo.svg
fi

# -----------------------------------------------------------------------------
# 2. Make PNG

# http://superuser.com/questions/134679/command-line-application-for-converting-svg-to-png-on-mac-os-x

# Does not work with built-in `qlmanage` - no transparency, square

# Install https://inkscape.org/en/download/mac-os/
inkscape=/Applications/Inkscape.app/Contents/Resources/bin/inkscape
$inkscape $(pwd)/logo.svg --export-png $(pwd)/logo.png --export-dpi 300

p="logo.png: PNG image data, 1620 x 479, 8-bit/color RGBA, non-interlaced"
if [ "$(file logo.png)" != "$p" ]; then
    echo "PNG file has unexpected parameters"
    exit
fi

# It could probably work with ImageMagick if installed with librsvg.
# Tried without it and the result was horrible.
# convert -density 1200 -resize 200x200 source.svg target.png

# -----------------------------------------------------------------------------
# 3. Crop PNG

# Does not work with built-in `sips` - cannot specify reference point;
# rotating and flipping does not help - reference also moves, wtf.

# brew install imagemagick --with-librsvg
convert -crop 376x376+16+21 logo.png logo.png


# -----------------------------------------------------------------------------
# 3. Make ICNS

# http://stackoverflow.com/questions/6337787/how-can-i-set-the-icon-for-a-mac-application-in-xcode

rm -r python.iconset*
mkdir -p python.iconset

convert logo.png -resize   16 python.iconset/icon_16x16.png
convert logo.png -resize   32 python.iconset/icon_16x16@2x.png
convert logo.png -resize   32 python.iconset/icon_32x32.png
convert logo.png -resize   64 python.iconset/icon_32x32@2x.png
convert logo.png -resize  128 python.iconset/icon_128x128.png
convert logo.png -resize  256 python.iconset/icon_128x128@2x.png
convert logo.png -resize  256 python.iconset/icon_256x256.png
convert logo.png -resize  512 python.iconset/icon_256x256@2x.png
convert logo.png -resize  512 python.iconset/icon_512x512.png
convert logo.png -resize 1024 python.iconset/icon_512x512@2x.png

iconutil -c icns python.iconset