optimised-favicon-generator.sh

#! /usr/local/bin/bash

if [ $# -eq 0 ]
	then
		echo "Usage: "$0" input_favicon.svg" 
		exit 1;
fi

SVG_SOURCE="$(echo $1)"
OUTPUT_DIR="$(echo `pwd`)"/output

# create the output directory and don't output error if it already exists
mkdir ${OUTPUT_DIR} 2> /dev/null

# generate optimised SVG
scour ${SVG_SOURCE} "${OUTPUT_DIR}"/icon.svg --enable-viewboxing --enable-id-stripping \
	--enable-comment-stripping --shorten-ids --indent=none

# generate PNGs
inkscape -h 32 ${SVG_SOURCE} --export-filename "${OUTPUT_DIR}""/favicon_unoptimised.png"
inkscape -h 180 ${SVG_SOURCE} --export-filename "${OUTPUT_DIR}""/apple-touch-icon_unoptimised.png"
inkscape -h 192 ${SVG_SOURCE} --export-filename "${OUTPUT_DIR}""/icon-192_unoptimised.png"
inkscape -h 512 ${SVG_SOURCE} --export-filename "${OUTPUT_DIR}""/icon-512_unoptimised.png"

# optimise PNGs
optipng -o7 -out "${OUTPUT_DIR}"/favicon.ico "${OUTPUT_DIR}""/favicon_unoptimised.png"
optipng -o7 -out "${OUTPUT_DIR}""/apple-touch-icon.png" "${OUTPUT_DIR}""/apple-touch-icon_unoptimised.png"
optipng -o7 -out "${OUTPUT_DIR}""/icon-192.png" "${OUTPUT_DIR}""/icon-192_unoptimised.png"
optipng -o7 -out "${OUTPUT_DIR}""/icon-512.png" "${OUTPUT_DIR}""/icon-512_unoptimised.png"

# clean up temporary files
rm "${OUTPUT_DIR}""/favicon_unoptimised.png"
rm "${OUTPUT_DIR}""/apple-touch-icon_unoptimised.png"
rm "${OUTPUT_DIR}""/icon-192_unoptimised.png"
rm "${OUTPUT_DIR}""/icon-512_unoptimised.png"