1 files changed, 33 insertions, 0 deletions
diff --git a/railties/lib/rails/backtrace_cleaner.rb b/railties/lib/rails/backtrace_cleaner.rb
new file mode 100644
index 0000000000..d8626aaf14
--- /dev/null
+++ b/railties/lib/rails/backtrace_cleaner.rb
@@ -0,0 +1,33 @@
+module Rails
+  class BacktraceCleaner < ActiveSupport::BacktraceCleaner
+    ERB_METHOD_SIG = /:in `_run_erb_.*/
+
+    VENDOR_DIRS  = %w( vendor/plugins vendor/gems vendor/rails )
+    SERVER_DIRS  = %w( lib/mongrel bin/mongrel lib/rack )
+    RAILS_NOISE  = %w( script/server )
+    RUBY_NOISE   = %w( rubygems/custom_require benchmark.rb )
+
+    ALL_NOISE    = VENDOR_DIRS + SERVER_DIRS + RAILS_NOISE + RUBY_NOISE
+
+    def initialize
+      super
+      add_filter   { |line| line.sub(RAILS_ROOT, '') }
+      add_filter   { |line| line.sub(ERB_METHOD_SIG, '') }
+      add_filter   { |line| line.sub('./', '/') } # for tests
+      add_silencer { |line| ALL_NOISE.any? { |dir| line.include?(dir) } }
+    end
+  end
+
+  # For installing the BacktraceCleaner in the test/unit
+  module BacktraceFilterForTestUnit #:nodoc:
+    def self.included(klass)
+      klass.send :alias_method_chain, :filter_backtrace, :cleaning
+    end
+
+    def filter_backtrace_with_cleaning(backtrace, prefix=nil)
+      backtrace = filter_backtrace_without_cleaning(backtrace, prefix)
+      backtrace = backtrace.first.split("\n") if backtrace.size == 1
+      Rails.backtrace_cleaner.clean(backtrace)
+    end
+  end
+end
+\ No newline at end of file