Module: AddMagicComment

Defined in:
lib/magic_encoding.rb

Overview

A simple library to prepend magic comments for encoding to multiple “.rb” files

Class Method Summary collapse

Class Method Details

.process(options) ⇒ Object

Options : 1 : Encoding 2 : Path TODO : check that the encoding specified is a valid encoding



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# File 'lib/magic_encoding.rb', line 11

def self.process(options)
  
  # defaults
  encoding  = options[0] || "utf-8"
  directory = options[1] || Dir.pwd
  
  prefix = "# -*- encoding : #{encoding} -*-\n"
  
  # TODO : add options for recursivity (and application of the script to a single file)
  rbfiles = File.join(directory ,"**", "*.rb")
  Dir.glob(rbfiles).each do |filename|
    file = File.new(filename, "r+")
    
    lines = file.readlines
    
    # remove current encoding comment(s)
    while lines[0] && (
          lines[0].starts_with?("# encoding") || 
          lines[0].starts_with?("# coding") ||
          lines[0].starts_with?("# -*- encoding"))
      lines.shift
    end

    # set current encoding
    lines.insert(0,prefix)
    
    file.pos = 0
    file.puts(lines.join) 
    file.close
  end
  p "Magic comments set for #{Dir.glob(rbfiles).count} source files"
end