From 71703c98ba2bf65a6fed94917b039827cb63bace Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jos=C3=A9=20Valim?= Date: Sun, 20 Jun 2010 13:26:42 +0200 Subject: Add ActiveSupport::FileUpdateChecker. --- .../lib/active_support/file_update_checker.rb | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 activesupport/lib/active_support/file_update_checker.rb (limited to 'activesupport/lib/active_support') diff --git a/activesupport/lib/active_support/file_update_checker.rb b/activesupport/lib/active_support/file_update_checker.rb new file mode 100644 index 0000000000..c0b5ca4deb --- /dev/null +++ b/activesupport/lib/active_support/file_update_checker.rb @@ -0,0 +1,37 @@ +module ActiveSupport + # This class is responsible to track files and invoke the given block + # whenever one of these files are changed. For example, this class + # is used by Rails to reload routes whenever they are changed upon + # a new request. + # + # routes_reloader = ActiveSupport::FileUpdateChecker.new(paths) do + # paths.each { |p| load(p) } + # Rails::Application.routes.reload! + # end + # + # ActionDispatch::Callbacks.to_prepare do + # routes_reloader.execute_if_updated + # end + # + class FileUpdateChecker + attr_reader :paths, :last_update_at + + def initialize(paths, calculate=false, &block) + @paths = paths + @block = block + @last_update_at = updated_at if calculate + end + + def updated_at + paths.map { |path| File.stat(path).mtime }.max + end + + def execute_if_updated + current_update_at = self.updated_at + if @last_update_at != current_update_at + @last_update_at = current_update_at + @block.call + end + end + end +end \ No newline at end of file -- cgit v1.2.3