generate_icons.rb

#!/usr/bin/env ruby
require 'json'

FILENAME = "../app/helpers/icon_helper.rb"
JAVASCRIPT_HELPER = "../public/js/icons/icons.js"

puts "Generating helper #{FILENAME}"
File.open(FILENAME, 'w') do |helper|
  helper.write "module IconHelper\n\n"

  Dir.glob(File.join("..","public","images","icons","*.svg")).each do |icon|
    svg = File.read(icon).delete("\n").delete("\r").delete("\t")
    name = icon.split('/').last.tr('-','_').gsub(/\.svg$/,'')
    puts "#{name}: #{svg.size} bytes"

    helper.write "  def icon_#{name}\n"
    helper.write "    '#{svg}'\n"
    helper.write "  end\n\n"
  end

  helper.write "end"
end

puts "Generating JavaScript helper"
File.open(JAVASCRIPT_HELPER, 'w') do |helper|
  Dir.glob(File.join("..","public","images","icons","*.svg")).each do |icon|
    svg = File.read(icon).delete("\n").delete("\r").delete("\t")
    name = icon.split('/').last.tr('-','_').gsub(/\.svg$/,'')
    
    # we only need a few specific icons in JavaScript, so skip those we don't want
    next unless name =~ /^cursor/ || name =~ /^arrow_right/
    
    puts "(JavaScript) #{name}: #{svg.size} bytes"

    helper.write "window.__icon_#{name} = #{svg.to_json};\n"
  end
end