#!/bin/bash

# Creates an icns file from a source image

src_image="$1"

if [ -z "$1" ]; then

    echo "No source image was passed to this script"

    exit 1

fi

icns_name="$2"

if [ -z "$2" ]; then

    icns_name="iconbuilder"

fi

if [ "${src_image:(-3)}" != "png" ]; then

    echo "Source image is not a PNG, making a converted copy..."

    /usr/bin/sips -s format png "$src_image" --out "${src_image}.png"

    if [ $? -ne 0 ]; then

	echo "The source image could not be converted to PNG format."

	exit 1

    fi

    src_image="${src_image}.png"

fi

iconset_path="./${icns_name}.iconset"

if [ -e "$iconset_path" ]; then

    /bin/rm -r "$iconset_path"

    if [ $? -ne 0 ]; then

	echo "There is a pre-existing file/dir $iconset_path the could not be deleted"

	exit 1

    fi

fi

/bin/mkdir "$iconset_path"

icon_file_list=(

    "icon_16x16.png"

    "icon_16x16@2x.png"

    "icon_32x32.png"

    "icon_32x32@2x.png"

    "icon_128x128.png"

    "icon_128x128@2x.png"

    "icon_256x256.png"

    "icon_256x256@2x.png"

    "icon_512x512.png"

    "icon_512x512@2x.png"

    )

icon_size=(

    '16'

    '32'

    '32'

    '64'

    '128'

    '256'

    '256'

    '512'

    '512'

    '1024'

    )

counter=0

for a in ${icon_file_list[@]}; do

    icon="${iconset_path}/${a}"

    /bin/cp "$src_image" "$icon"

    icon_size=${icon_size[$counter]}

    /usr/bin/sips -z $icon_size $icon_size "$icon"

    counter=$(($counter + 1))

done

echo "Creating .icns file from $iconset_path"

/usr/bin/iconutil -c icns "$iconset_path"

if [ $? -ne 0 ]; then

    echo "There was an error creating the .icns file"

    exit 1

fi

echo "Done"

exit 0