Conver ruby-processing to propane

convert.rb

# convert.rb

VECLIBR = /\:(vecmath|fastmath)/

sketch = <<CODE
require 'propane'

class %s < Propane::App
  %s
end

%s.new title: '%s'
CODE

Dir['/home/tux/test/**/*.rb'].each do |rb_file|
  next if File.directory? rb_file
  old = IO.read(rb_file)
  title_a = File.basename(rb_file, '.rb').split('_').each(&:capitalize!)
  title = title_a.join(' ')
  classname = title_a.join
  new = format(sketch, classname, old, classname, title)
  IO.write(rb_file, new)
end

indent.rb

# encoding: utf-8
# frozen_string_literal: false
TAB = '  '.freeze

# class
class Indent
  attr_reader :indent_string, :file, :new_lines
  def initialize(file)
    @file = file
    @indent_string = []
    @new_lines = []
  end

  def parse_code
    File.open(file, 'r').readlines.each do |line|
      new_line = line.strip
      case new_line
      when /^(end)/
        indent_string.shift
        new_line.insert(0, indent_string.join)
      when /^(class)/
        indent_string << TAB
      when /^(def)/
        new_line.insert(0, indent_string.join)
        indent_string << TAB
      when /^(if)\s+/
        new_line.insert(0, indent_string.join)
        indent_string << TAB
      when /^(module)/
        indent_string << TAB
      else
        new_line.insert(0, indent_string.join)
      end
      new_lines << new_line
    end
    self
  end

  def write
    File.open(file, 'w:UTF-8') do |f|
      new_lines.each { |l| f.puts(l) }
    end
  end
end

Dir['/home/tux/test/**/*.rb'].each do |rb_file|
  Indent.new(rb_file)
      .parse_code
      .write
end