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May 13, 2021 06:14
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Give it a <link> from Google fonts and get back CSS with fonts embedded
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#!/usr/bin/ruby | |
# encoding: utf-8 | |
# Grab google web fonts and embed them as base64 data URIs | |
# <http://brettterpstra.com/2015/03/14/embedding-google-web-fonts/> | |
require 'base64' | |
if ARGV.length > 0 | |
input = ARGV | |
elsif STDIN.stat.size > 0 | |
input = STDIN.read.strip.split(/\n+/) | |
else | |
$stderr.puts "No input" | |
Process.exit 1 | |
end | |
output = "" | |
input.each {|line| | |
if line =~ /^\s*<link.*?>\s*$/ | |
url = line.match(/href='(.*?)'/) | |
if url | |
css_url = url[1] | |
else | |
$stderr.puts "Error matching url" | |
end | |
css = %x{curl -sS '#{css_url}'}.strip | |
css.gsub!(/(src: .*?, url\()(.*?)(\) format\(')(.*?)('\);)/).each {|src| | |
pre = $1 | |
font_url = $2 | |
mid = $3 | |
font_fmt = $4 | |
post = $5 | |
font_ext = font_url.match(/\.(\w+)$/)[1] | |
font_src = %x{curl -sS '#{font_url}'} | |
enc = Base64.encode64(font_src).strip.gsub(/\n/,'') | |
%Q{src:url("data:font/#{font_ext};base64,#{enc}") format('#{font_fmt}');} | |
} | |
output += css + "\n" | |
else | |
next | |
end | |
} | |
$stdout.puts output |
You will want to change to change the regex on line 20 support double quotes.
/href=['"](.*?)['"]/
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Syntax to run this on Windows, to add on top of @eikaramba's change, is:
ruby font_grabber.rb "<link href='https://fonts.googleapis.com/css?family=Merriweather:300,400,700' rel='stylesheet'>" > fonts.css