Monitors a public Google Docs page containing source code and compiles it in C++ every five seconds. Primitive CI.

google_docs_cpp_monitor.rb

#!/usr/bin/env ruby

# Andrew Horsman
# Monitors a Google Docs page and continuously compiles the text with Clang++.

require 'net/http'
require 'open-uri'

class Downloader
  def initialize(source_url)
    @download_url = generate_url(source_url)
    @previous_content = ""
    puts "Monitoring on #{@download_url}"
  end

  def generate_url(source_url)
    sep = (0...source_url.length).find_all { |i| source_url[i] == "/" }
    doc_id =source_url[sep[-2] + 1 ... sep[-1]]
    "https://docs.google.com/feeds/download/documents/Export?docID=#{doc_id}&exportFormat=txt&format=txt"
  end

  def get_content
    content = `curl -L -s "#{@download_url}"`.force_encoding("ASCII").to_s[3..-1]
    if content != @previous_content
      @previous_content = content
      File.open("temp_compile.cpp", "w") { |f| f.print content }
      return true
    end

    return false
  end
end

d = Downloader.new(ARGV[0])

loop do
  puts "[~] Checking for changes..."
  if d.get_content
    puts "[+] Compiling..."
    `clang++ -stdlib=libc++ temp_compile.cpp`
    puts "[+] Done compiling..."
  end

  sleep(5)
end