Merge pull request #1231 from joshk/ruby-debugger

Ruby debugger corrections

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

 require 'active_record/connection_adapters/abstract_adapter'
-require 'active_support/core_ext/kernel/requires'
 require 'active_support/core_ext/object/blank'
 require 'set'
 

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

 require 'active_record/connection_adapters/abstract_adapter'
-require 'active_support/core_ext/kernel/requires'
 require 'active_support/core_ext/object/blank'
 
 # Make sure we're using pg high enough for PGResult#values

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

 require 'active_record/connection_adapters/abstract_adapter'
-require 'active_support/core_ext/kernel/requires'
 
 module ActiveRecord
   module ConnectionAdapters #:nodoc:

activesupport/lib/active_support/core_ext/kernel.rb

 require 'active_support/core_ext/kernel/reporting'
 require 'active_support/core_ext/kernel/agnostics'
-require 'active_support/core_ext/kernel/requires'
 require 'active_support/core_ext/kernel/debugger'
 require 'active_support/core_ext/kernel/singleton_class'

activesupport/lib/active_support/core_ext/kernel/debugger.rb

@@ -5,12 +5,6 @@ def debugger
       message = "\n***** Debugger requested, but was not available (ensure ruby-debug is listed in Gemfile/installed as gem): Start server with --debugger to enable *****\n"
       defined?(Rails) ? Rails.logger.info(message) : $stderr.puts(message)
     end
-  end
-
-  undef :breakpoint if respond_to?(:breakpoint)
-  def breakpoint
-    message = "\n***** The 'breakpoint' command has been renamed 'debugger' -- please change *****\n"
-    defined?(Rails) ? Rails.logger.info(message) : $stderr.puts(message)
-    debugger
+    alias breakpoint debugger unless respond_to?(:breakpoint)
   end
 end

activesupport/lib/active_support/core_ext/kernel/requires.rb

-require 'active_support/core_ext/kernel/reporting'
-
-module Kernel
-  # Require a library with fallback to RubyGems.  Warnings during library
-  # loading are silenced to increase signal/noise for application warnings.
-  def require_library_or_gem(library_name)
-    silence_warnings do
-      begin
-        require library_name
-      rescue LoadError => cannot_require
-        # 1. Requiring the module is unsuccessful, maybe it's a gem and nobody required rubygems yet. Try.
-        begin
-          require 'rubygems'
-        rescue LoadError # => rubygems_not_installed
-          raise cannot_require
-        end
-        # 2. Rubygems is installed and loaded. Try to load the library again
-        begin
-          require library_name
-        rescue LoadError # => gem_not_installed
-          raise cannot_require
-        end
-      end
-    end
-  end
-end

activesupport/test/core_ext/kernel_test.rb

@@ -52,10 +52,10 @@ def test_class_eval
     class << o; @x = 1; end
     assert_equal 1, o.class_eval { @x }
   end
-  
+
   def test_capture
-    assert_equal 'STDERR', capture(:stderr) {$stderr.print 'STDERR'}
-    assert_equal 'STDOUT', capture(:stdout) {print 'STDOUT'}
+    assert_equal 'STDERR', capture(:stderr) { $stderr.print 'STDERR' }
+    assert_equal 'STDOUT', capture(:stdout) { print 'STDOUT' }
   end
 end
 
@@ -73,3 +73,43 @@ def test_suppression
     suppress(LoadError, ArgumentError) { raise ArgumentError }
   end
 end
+
+class MockStdErr
+  attr_reader :output
+  def puts(message)
+    @output ||= []
+    @output << message
+  end
+
+  def info(message)
+    puts(message)
+  end
+
+  def write(message)
+    puts(message)
+  end
+end
+
+class KernelDebuggerTest < Test::Unit::TestCase
+  def test_debugger_not_available_message_to_stderr
+    old_stderr = $stderr
+    $stderr = MockStdErr.new
+    debugger
+    assert_match(/Debugger requested/, $stderr.output.first)
+  ensure
+    $stderr = old_stderr
+  end
+
+  def test_debugger_not_available_message_to_rails_logger
+    rails = Class.new do
+      def self.logger
+        @logger ||= MockStdErr.new
+      end
+    end
+    Object.const_set("Rails", rails)
+    debugger
+    assert_match(/Debugger requested/, rails.logger.output.first)
+  ensure
+    Object.send(:remove_const, "Rails")
+  end
+end
\ No newline at end of file

railties/lib/rails/rack/debugger.rb

-require 'active_support/core_ext/kernel/requires'
-
 module Rails
   module Rack
     class Debugger
@@ -8,11 +6,12 @@ def initialize(app)
 
         ARGV.clear # clear ARGV so that rails server options aren't passed to IRB
 
-        require_library_or_gem 'ruby-debug'
+        require 'ruby-debug'
+
         ::Debugger.start
         ::Debugger.settings[:autoeval] = true if ::Debugger.respond_to?(:settings)
         puts "=> Debugger enabled"
-      rescue Exception
+      rescue LoadError
         puts "You need to install ruby-debug to run the server in debugging mode. With gems, use 'gem install ruby-debug'"
         exit
       end

railties/lib/rails/test_help.rb

@@ -3,7 +3,6 @@
 abort("Abort testing: Your Rails environment is running in production mode!") if Rails.env.production?
 
 require 'test/unit'
-require 'active_support/core_ext/kernel/requires'
 require 'active_support/test_case'
 require 'action_controller/test_case'
 require 'action_dispatch/testing/integration'