Simple Thor task to convert PNGs to Base64 strings. Also compresses them using pngcrush.

PNGtoBase64

#!/usr/bin/env ruby
require 'thor'
require 'base64'
require 'clipboard'

module PNGUtils
  def PNGUtils.crush(file_path)
    crushed = "#{file_path}.crushed"
    # `pngcrush -rem alla -reduce -brute "#{file_path}" "#{crushed}"`
    output = IO.popen("pngcrush -rem alla -reduce -brute \"#{file_path}\" \"#{crushed}\"")
    puts output.readlines
    return crushed
  end
  
  def PNGUtils.encode(file_path)
    string = Base64.encode64(File.read(file_path)).gsub(/\s+/, "")
    return string
  end
  
end


class Pngto64 < Thor
  include PNGUtils
  
  desc "single_file FILE_PATH", "Converts single PNG to Base64 and copies string to your clipboard."
  def single_file(file_path)
    #Crush PNG First
    crushed = PNGUtils.crush(file_path)
    
    
    #Encode crushed file to base64, copy to clipboard.
    string = PNGUtils.encode(crushed)
    Clipboard.copy string
    
    #Delete the file created in by the crusher.
    FileUtils.remove_file(crushed)
    
    #Display the all clear - In Green Text!
    puts "\e[1m\e[32mBase64 String is in your Clipboard!\e[0m"
  end
  
  desc "crush_64string [STRING]", "Crushes a PNG already encoded in a Base64 String."
  method_options %w( clipboard -c ) => :boolean
  def crush_64string(string = "")
    if options.clipboard?
      string = Clipboard.paste
      puts "Getting string from clipboard"
    else
      string = string
    end
    
    #Setup temporary png path, decode the Base64 string, save the file.
    temp_path = '/tmp/crush.png'
    temp_png = File.open(temp_path, 'w+') {|f| f.write(Base64.decode64(string)) }
    
    #Crush the temp file
    crushed = PNGUtils.crush(temp_path)
    
    #Encode crushed file to base64, copy to clipboard.
    string = PNGUtils.encode(crushed)
    Clipboard.copy string
    
    #Delete the file created in by the crusher.
    FileUtils.remove_file(crushed)
    FileUtils.remove_file(temp_path)
  
    #Display the all clear - In Green Text!
    puts "\e[1m\e[32mBase64 String is in your Clipboard!\e[0m"
  end
end

Pngto64.start #Required for thor executable.