1 files changed, 84 insertions, 0 deletions
diff --git a/railties/lib/tasks/annotations.rake b/railties/lib/tasks/annotations.rake
new file mode 100644
index 0000000000..20ccad6d7b
--- /dev/null
+++ b/railties/lib/tasks/annotations.rake
@@ -0,0 +1,84 @@
+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
+\ No newline at end of file