Merged updates from trunk into stable branch

[feedcatcher.git] / vendor / rails / actionpack / lib / action_controller / vendor / rack-1.0 / rack / reloader.rb

diff --git a/vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/reloader.rb b/vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/reloader.rb
new file mode 100644 (file)
index 0000000..b17d8c0
--- /dev/null
+++ b/vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/reloader.rb
@@ -0,0 +1,64 @@
+require 'thread'
+
+module Rack
+  # Rack::Reloader checks on every request, but at most every +secs+
+  # seconds, if a file loaded changed, and reloads it, logging to
+  # rack.errors.
+  #
+  # It is recommended you use ShowExceptions to catch SyntaxErrors etc.
+
+  class Reloader
+    def initialize(app, secs=10)
+      @app = app
+      @secs = secs              # reload every @secs seconds max
+      @last = Time.now
+    end
+
+    def call(env)
+      if Time.now > @last + @secs
+        Thread.exclusive {
+          reload!(env['rack.errors'])
+          @last = Time.now
+        }
+      end
+
+      @app.call(env)
+    end
+
+    def reload!(stderr=$stderr)
+      need_reload = $LOADED_FEATURES.find_all { |loaded|
+        begin
+          if loaded =~ /\A[.\/]/  # absolute filename or 1.9
+            abs = loaded
+          else
+            abs = $LOAD_PATH.map { |path| ::File.join(path, loaded) }.
+                             find { |file| ::File.exist? file }
+          end
+
+          if abs
+            ::File.mtime(abs) > @last - @secs  rescue false
+          else
+            false
+          end
+        end
+      }
+
+      need_reload.each { |l|
+        $LOADED_FEATURES.delete l
+      }
+
+      need_reload.each { |to_load|
+        begin
+          if require to_load
+            stderr.puts "#{self.class}: reloaded `#{to_load}'"
+          end
+        rescue LoadError, SyntaxError => e
+          raise e                 # Possibly ShowExceptions
+        end
+      }
+
+      stderr.flush
+      need_reload
+    end
+  end
+end