Evaluate an ERB template, injecting a YAML file of variables.

process-erb.rb

#!/usr/bin/env ruby

require 'erb'
require 'yaml'

class HashBinding
  def initialize(hash)
    @hash = hash.dup
  end
  def method_missing(m, *args, &block)
    @hash[m.to_s]
  end
  def get_binding
    binding
  end
end

t = ERB.new(File.read(ARGV[0]))
vars = YAML.load_file(ARGV[1])
b = HashBinding.new(vars)
puts t.result(b.get_binding)

Usage: ./process-erb.rb template.erb vars.yml > out.txt

Doesnt work for me - can you attach two generic inputs?
For instance are you calling the var with <%= var %> or <%= @var %> ?