interpolique.rb

#!/usr/bin/env ruby
require "base64"

def b(string, context)
  string.gsub /\^\{(.*?)\}/ do |s|
    val = context.eval(s[2..-2])
    "b64d(\"#{Base64.encode64(val).strip}\")"
  end
end


def test_one
  foo = "awesome"
  bar = "sauce"
  puts b("one ^{foo} ^{bar}", binding)
end

def test_two
  foo = "blargle"
  bar = "fish"
  puts b("two ^{foo} ^{bar}", binding)
end

def test_three
  foo = "bar"
  bar = "baz"
  puts b("three ^{foo} ^{bar}", binding)
end

def test_four
  foo = "ham"
  bar = "egs"
  puts b("four ^{foo} ^{bar}", binding)
end


test_one
test_two
test_three
test_four