Vendors Rakefile for linux users

Rakefile

require 'rake/clean'

JRUBY_VERSION      = "1.7.3"
PROCESSING_VERSION = "2.0b8"

CLOBBER.include("processing-#{PROCESSING_VERSION}-linux64.tgz", "jruby-complete-#{JRUBY_VERSION}.jar")

desc "download and copy to ruby-processing"
task :default => [:download, :copy]

desc "download Processing & JRuby upstream sources"
task :download => ["processing-#{PROCESSING_VERSION}-linux64.tgz", "jruby-complete-#{JRUBY_VERSION}.jar"]

file "processing-#{PROCESSING_VERSION}-linux64.tgz" do
  sh "wget http://processing.googlecode.com/files/processing-#{PROCESSING_VERSION}-linux64.tgz"
  check_sha1("processing-#{PROCESSING_VERSION}-linux64.tgz", "67a2d4df82233d96982865581b2c24799ea23518")
end

file "jruby-complete-#{JRUBY_VERSION}.jar" do
  sh "wget http://jruby.org.s3.amazonaws.com/downloads/#{JRUBY_VERSION}/jruby-complete-#{JRUBY_VERSION}.jar"
  check_sha1("jruby-complete-#{JRUBY_VERSION}.jar","fafe20bce6f70ce295f24160a1e470823edba3e7")
end

directory "../lib/core"

desc "copy libs & jars"
task :copy => ["../lib/core"] do
  sh "cp -v jruby-complete-#{JRUBY_VERSION}.jar ../lib/core/jruby-complete.jar"

  processing_zip = File.expand_path("processing-#{PROCESSING_VERSION}-linux64.tgz")
  sh "cd ../lib/core && tar --wildcards --strip=3 -zvxf #{processing_zip} processing-#{PROCESSING_VERSION}/core/library/*.jar"

  dirs = %w{dxf javascript minim net pdf serial video}
  Dir.chdir("../library/") do
    sh "rm -rf processing-#{PROCESSING_VERSION}/ #{dirs.join(" ")}"
    inside_zip_dirs = dirs.collect { |d| "processing-#{PROCESSING_VERSION}/modes/java/libraries/#{d}/library/*" }
    sh "tar --wildcards -zxvf #{processing_zip} #{inside_zip_dirs.join(" ")}"
    sh "mv processing-#{PROCESSING_VERSION}/modes/java/libraries/* ."
    sh "rm -r processing-#{PROCESSING_VERSION}/"
  end
end

def check_sha1(filename, expected_hash)
  require "digest/sha1"
  sha1 = Digest::SHA1.new
  File.open(filename, "r") do |f|
    while buf = f.read(4096)
      sha1.update(buf)
    end
  end
  if sha1.hexdigest != expected_hash
    raise "bad sha1 checksum for #{filename} (expected #{expected_hash} got #{sha1.hexdigest})"
  end
end