genutil.rb

require 'ostruct'
require 'json'
require 'yaml'
require 'pp'
require 'Set'
require 'erb'

class Hash
  def to_o
    JSON.parse to_json, object_class: OpenStruct
  end
end

class Array
  def prep_join(prep)
    self.map { |e| prep + e }.join;
  end
end

def indent(s, times = 1)
    s.split("\n").map{|l| ('    ' * times) + l}.join("\n")
end

def expand_cargs(args)
    (args || []).map{ |arg| "#{ arg.type } #{ arg.name }" }.prep_join(", ")
end

def expand_cparams(args)
    (args || []).map{ |arg| arg.name }.prep_join(", ")
end

class ErbalT < OpenStruct
    def result(path)
        ret = nil
        File::open(path, 'r') do |f|
            src = f.read.gsub(/\/\*%/, '<%').gsub(/%\*\//, '%>')
            ret = ERB.new(src, nil, '-').result(binding)
        end

        ret.strip + "\n"
    end

    def render(path, out_path = nil)
        header = <<-EOS
// *** WARNING ***
// This file is generated by #{File.basename($0)}
// Keep untouched or ruin the abstraction
EOS
        src = header + result(path)
        out_path = out_path || path.gsub(/\.template/, '')
        File.write(out_path, src)
    end
end