Added source-annotations extractor tasks to rake [Jamis Buck]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6229 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/CHANGELOG

 *SVN*
 
+* Added source-annotations extractor tasks to rake [Jamis Buck]. This allows you to add FIXME, OPTIMIZE, and TODO comments to your source code that can then be extracted in concert with rake notes (shows all), rake notes:fixme, rake notes:optimize and rake notes:todo.
+
 * Added fixtures :all to test_helper.rb to assume that most people just want all their fixtures loaded all the time [DHH]
 
 * Added config/initializers where all ruby files within it are automatically loaded after the Rails configuration is done, so you don't have to litter the environment.rb file with a ton of mixed stuff [DHH]

railties/lib/tasks/annotations.rake

+class SourceAnnotationExtractor
+  class Annotation < Struct.new(:line, :tag, :text)
+    def to_s(options={})
+      s = "[%3d] " % line
+      s << "[#{tag}] " if options[:tag]
+      s << text
+    end
+  end
+
+  def self.enumerate(tag, options={})
+    extractor = new(tag)
+    extractor.display(extractor.find, options)
+  end
+
+  attr_reader :tag
+
+  def initialize(tag)
+    @tag = tag
+  end
+
+  def find(dirs=%w(app lib test))
+    dirs.inject({}) { |h, dir| h.update(find_in(dir)) }
+  end
+
+  def find_in(dir)
+    results = {}
+
+    Dir.glob("#{dir}/*") do |item|
+      next if File.basename(item)[0] == ?.
+
+      if File.directory?(item)
+        results.update(find_in(item))
+      elsif item =~ /\.r(?:b|xml|js)$/
+        results.update(extract_annotations_from(item, /#\s*(#{tag}):?\s*(.*)$/))
+      elsif item =~ /\.rhtml$/
+        results.update(extract_annotations_from(item, /<%\s*#\s*(#{tag}):?\s*(.*?)\s*%>/))
+      end
+    end
+
+    results
+  end
+
+  def extract_annotations_from(file, pattern)
+    lineno = 0
+    result = File.readlines(file).inject([]) do |list, line|
+      lineno += 1
+      next list unless line =~ pattern
+      list << Annotation.new(lineno, $1, $2)
+    end
+    result.empty? ? {} : { file => result }
+  end
+
+  def display(results, options={})
+    results.keys.sort.each do |file|
+      puts "#{file}:"
+      results[file].each do |note|
+        puts "  * #{note.to_s(options)}"
+      end
+      puts
+    end
+  end
+end
+
+desc "Enumerate all annotations"
+task :notes do
+  SourceAnnotationExtractor.enumerate "OPTIMIZE|FIXME|TODO", :tag => true
+end
+
+namespace :notes do
+  desc "Enumerate all OPTIMIZE annotations"
+  task :optimize do
+    SourceAnnotationExtractor.enumerate "OPTIMIZE"
+  end
+
+  desc "Enumerate all FIXME annotations"
+  task :fixme do
+    SourceAnnotationExtractor.enumerate "FIXME"
+  end
+
+  desc "Enumerate all TODO annotations"
+  task :todo do
+    SourceAnnotationExtractor.enumerate "TODO"
+  end
+end
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