From: dominic sisneros <dom@...>
Date: 2004-10-16T23:50:16+09:00
Subject: Re: eRuby for Windows

This site probably has the best documentation.

http://www2a.biglobe.ne.jp/~seki/ruby/erb.html

Also, the code generation in Ruby uses Erb and has examples


On Oct 13, 2004, at 7:39 AM, Thomas Leitner wrote:

> On Wed, 13 Oct 2004 22:21:27 +0900
> Gavin Kistner <gavin@refinery.com> wrote:
>
> | On Oct 13, 2004, at 3:22 AM, David Heinemeier Hansson wrote:
> | > Yes, it's called ERb and is basically a Ruby-version of eRuby. It's
> | > even included in the standard library with Ruby 1.8.x. Have a look
> | > at http://www.ruby-doc.org/stdlib/libdoc/erb/rdoc/index.html
> |
> | Awesome. Thanks, David!
> |
> | Except...erm...there's no documentation.
> |
> | When I have more free time I'd love to help out the ruby-doc project
> | and document this library. But right now I'm working 12 hour days and
> | don't have time to dive into the source code to figure it out.
> |
> | Anyone have a bit of an example showing how to set up an HTML 
> template
> |
> | with embedded ruby code, and then load that template into the program
> | code at a current state (so all the necessary variables are setup) 
> and
> |
> | 'flatten' the template into the output HTML?
> |
>
> I don't know if the following helps, but I'm currently using ERb for 
> one of my projects. The template does not use HTML but LaTeX, but it 
> is the same for HTML anyway.
>
> --------------------- template snippet with ERb code fragments -----
>
> \ecvlastname{<%= value('header/name/surname') %>}
> \ecvfirstname{<%= value('header/name/firstname') %>}
> \ecvaddress{<%= value('header/address') %>}
> <% if resume.elements['header/contact/phone'] %>
> \ecvtelephone{<%= value('header/contact/phone') %>}
> <% end %>
> <% if resume.elements['header/contact/fax'] %>
> \ecvfax{<%= value('header/contact/fax') %>}
> <% end %>
> <% if resume.elements['header/contact/email'] %>
> \ecvemail{\texttt{<%= value('header/contact/email') %>}}
> <% end %>
> \ecvnationality{Austrian}
> \ecvdateofbirth{<%= value('header/birth/date') %>}
>
> ---------------------------------------------------------------------
>
> ---------------------------- Converter class using ERb --------------
> class Converter
>
>   attr_writer :template
>   attr_writer :source
>   attr_writer :config
>
>   def initialize
>     @template = nil
>     @source = nil
>     @config = nil
>   end
>
>   def convert
>     @processor = ResumeProcessor.new( @config )
>
>     # Create a new ERB object with the given template
>     erb = ERB.new( File.read( @template ) )
>     file = File.new( @source )
>     @resume = REXML::Document.new( File.new( @source ) ).root
>     resume = @resume
>
>     # Evaluate the template in the current context
>     print erb.run( binding )
>   end
>
>   def value( path, element = @resume )
>     @processor.get_value( element.elements[path] )
>   end
>
> end
>
> c = Converter.new
> #... set template, source and config for converter
> c.convert
> ---------------------------------------------------------------------
>
> The @template variable for the Converter class is loaded with the 
> filename of the template. You only have to call the erb.run method 
> (and probably supply a binding) and it will return the result.
>
> Thomas
>
>