From: Patrick Hurley <phurley@...>
Date: 2006-08-17T11:45:36+09:00
Subject: Re: Ruby Compressor (little long)

On 8/16/06, Scott <bauer.mail@gmail.com> wrote:
> I havent personally used this to distribute an application, but it
> sounds like it'll fit the bill:
>
> http://www.erikveen.dds.nl/allinoneruby/index.html
>
>
> Patrick Hurley wrote:
> > I have need to distribute applications to customers. The customers
> > have every right to the source code, but when it is installed we do
> > not want the code to be easily visible. We are not worried about super
> > hackers (or even moderately strong Ruby programmers :-), we just do
> > not want our raw source code on the system calling out to be played
> > with by the end users.
> >
> > To this end, I have developed this very simple script, which I plan on
> > further refining. I know there are many rough edges, but I wanted to
> > see if anyone else was interested in the code (or had any other
> > suggestions), before I went any further.
> >
> > require "zlib"
> >
> > @init = <<ZLIB_REQUIRE
> > module Kernel
> >   alias default_require require
> >   @@zlib_requires = {}
> >
> >   def zlib_requires=(zr)
> >     @@zlib_requires = zr
> >   end
> >
> >   def require(path)
> >     return false if $".include?(path)
> >
> >     if @@zlib_requires.has_key(path)
> >       eval(Zlib::Inflate.inflate(@@zlib_requires[path]))
> >       $" << path
> >     else
> >       default_require path
> >     end
> >   end
> >
> > end
> > ZLIB_REQUIRE
> >
> > @bootstrap = <<BOOTSTRAP
> > require "zlib"
> > File.open(__FILE__, "rb") do |data|
> >   # skip to the end
> >   line = data.gets until line =~ /^__END__$/
> >   f = Marshal.load(data)
> >   eval(Zlib::Inflate.inflate(f[:init]))
> >   Kernel.zlib_requires = f
> >   eval(Zlib::Inflate.inflate(f[:main]))
> > end
> > __END__
> > BOOTSTRAP
> >
> > def findrb(fname)
> >   $:.each do |path|
> >     fp = File.join(path, fname)
> >     return fp if File.exists? fp
> >   end
> >   false
> > end
> >
> > def compress(script)
> >   files = {}
> >   load(script) rescue nil
> >
> >   $".each do |fname|
> >     if (File.extname(fname) == ".rb") && (fp = findrb(fname))
> >       data = IO.read(fp)
> >       files[fname] = Zlib::Deflate.deflate(data, Zlib::BEST_COMPRESSION)
> >     end
> >   end
> >
> >   files[:main] = Zlib::Deflate.deflate(IO.read(script), Zlib::BEST_COMPRESSION)
> >   files[:init] = Zlib::Deflate.deflate(@init, Zlib::BEST_COMPRESSION)
> >
> >   File.open("compress-#{script}", "wb") do |io|
> >     io.print @bootstrap
> >     io.write(Marshal.dump(files))
> >   end
> >
> >   # write header data - fname,
> > end
> >
> > compress(ARGV[0])
>
>
>

I have used this and rubyscript2exe they are wonderful, but serve a
slightly different purpose. I just want to hide the code a little bit.
In our particular case installing Ruby is not a real problem.

Thanks
pth