Method: String#eval_handlebars

Defined in:
lib/mysh/handlebars/eval_handlebars.rb

#eval_handlebars(evaluator = $mysh_exec_binding) ⇒ Object

Evaluate any variable substitutions in the input.



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# File 'lib/mysh/handlebars/eval_handlebars.rb', line 7

def eval_handlebars(evaluator=$mysh_exec_binding)
  string, text, buffer = self, "", []

  # Translate the string with embedded code into Ruby code.
  until string.empty?
    text, code, string = string.partition(/{{.*?}}/m)

    unless text.empty?
      text = text.gsub(/\\[{}]/) {|found| found[1]}
      buffer << "_m_<<#{text.inspect};"
    else
      buffer << "" if buffer.empty?
    end

    unless code.empty?
      if code[-3] == "#"
        buffer << "#{code[2...-3]};"
      else
        buffer << "_m_<<(#{code[2...-2]}).to_s;"
      end
    end
  end

  # Evaluate the result of the translation.
  if buffer.length > 1
    evaluator.eval("_m_ = '';" + buffer.join + "_m_")
  else
    text
  end
end