Class: Munger::Munge

Inherits:
Object
  • Object
show all
Defined in:
lib/munger/munge.rb

Constant Summary collapse

OPTIONS = 
[:mode, :pattern, :tag, :content, :content_path, :input,
:input_path, :output, :output_path, :path, :verbose]

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Munge

Returns a new instance of Munge.



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# File 'lib/munger/munge.rb', line 15

def initialize(options)
  self.mode = options[:mode] || :append
  self.pattern = Regexp.compile(options[:pattern]) unless mode == :append
  self.tag = options[:tag] || ''
  self.verbose = options[:verbose]

  if verbose
    settings = OPTIONS.map {|attr| "#{attr} = #{eval "#{attr}.inspect"}" }
    puts settings.join(', ')
  end
end

Instance Method Details

#run(input, content) ⇒ Object 



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# File 'lib/munger/munge.rb', line 27

def run(input, content)
  startTag = tag + " (munge start)"
  endTag = tag + " (munge end)"
  content = [startTag, content.rstrip, endTag].join("\n")

  result = []
  skipping = nil
  needMatch = [:before, :replace, :after, :replace_or_append].include? mode
  input.split("\n").each do |l|
    if skipping
      if l == endTag
        puts "Done skipping: #{l}" if verbose
        skipping = nil
        if [:replace, :replace_or_append].include?(mode)
          puts "Inserting content" if verbose
          result << content
        end
      else
        puts "Skipping: #{l}" if verbose
      end
    elsif l == startTag
      puts "Start skipping: #{l}" if verbose
      skipping = true
      needMatch = nil
    else
      matched = needMatch && pattern.match(l)
      if mode == :before && matched
        puts "Matched (before): inserting before #{l}" if verbose
        result << content
        needMatch = nil
      end
      if [:replace, :replace_or_append].include?(mode) && matched
        puts "Matched (#{mode}): replacing #{l}" if verbose
        result << content
        needMatch = nil
      else
        puts "Using existing line #{l}" if verbose
        result << l
      end
      if mode == :after && matched
        puts "Matched (after): inserting after #{l}" if verbose
        result << content
        needMatch = nil
      end
    end
  end

  if mode == :append or (mode == :replace_or_append && needMatch)
    puts "Appending..." if verbose
    result << content
  end

  result << "" # make sure we end with a newline
  result.join("\n")
end