Jim Weirich gives a cool example of using Rake to automate searching your source code. The example even includes Emacs integration. But I live in TextMate these days, so here’s the TextMate integration for Jim’s fic.rb:

#!/usr/bin/env ruby
#fl2tm.rb converts 'file:lineno context' into HTML for TextMate
require 'rubygems'
require_gem 'builder'

base = Dir.pwd
title = ENV["TITLE"] || "Stdout 4 TextMate" 
lines = []
xml = Builder::XmlMarkup.new(:target=>STDOUT, :indent=>2)
xml.html do
  xml.head do
    xml.title(title)
  end
  xml.body do
    xml.h1(title)
    while line = gets
      lines.push line
      # doesn't handle whitespace in path names 
      if line =~ /\s*([^:]+):(\d+):(.*)/
        (file, line, context) = [$1,$2,$3].map {|i| i.chomp}
        xml.li do
          if file =~ %r{^/}
            href = "txmt://open?url=file://#{file}&line=#{line}" 
          else
            href = "txmt://open?url=file://#{base}/#{file}&line=#{line}" 
          end
          xml.a "href" => href do
            xml.text! "#{file}:#{line}" 
          end
          xml.text! context
        end
      end
    end
    xml.hr
    xml.pre(lines.join())
  end
end

#!/usr/bin/env ruby
$: << ENV['TM_SUPPORT_PATH'] + '/lib'
require "dialog" 

Dialog.request_string(:title => "Find in Code",
                     :prompt => "Extensions Then Res",
                    :button1 => "Find") do |line|
  Dir.chdir(ENV['TM_PROJECT_DIRECTORY'])
  path = ENV['TM_RUBY_SAMPLES'] 
  system "#{path}/rake/fic.rb #{line} | #{path}/rake/fl2tm.rb" 
end