add -I config option

.rspec

@@ -0,0 +1 @@
+-Ispec

lib/rspec/core/configuration.rb

@@ -92,6 +92,10 @@ def full_backtrace=(bool)
         @options[:backtrace_clean_patterns].clear
       end
 
+      def libs=(libs)
+        libs.map {|lib| $LOAD_PATH.unshift lib}
+      end
+
       def debug=(bool)
         return unless bool
         begin

lib/rspec/core/configuration_options.rb

@@ -60,23 +60,41 @@ def parser(options)
           OptionParser.new do |parser|
             parser.banner = "Usage: rspec [options] [files or directories]"
 
+            parser.on('-b', '--backtrace', 'Enable full backtrace') do |o|
+              options[:full_backtrace] = true
+            end
+
             parser.on('-c', '--[no-]color', '--[no-]colour', 'Enable color in the output') do |o|
               options[:color_enabled] = o
             end
 
+            parser.on('-d', '--debug', 'Enable debugging') do |o|
+              options[:debug] = true
+            end
+
+            parser.on('-e', '--example PATTERN', "Run examples whose full descriptions match this pattern",
+                    "(PATTERN is compiled into a Ruby regular expression)") do |o|
+              options[:full_description] = /#{o}/
+            end
+
             parser.on('-f', '--formatter FORMATTER', 'Choose a formatter',
                     '  [p]rogress (default - dots)',
                     '  [d]ocumentation (group and example names)') do |o|
               options[:formatter] = o
             end
 
-            parser.on('-l', '--line_number LINE', 'Specify the line number of a single example to run') do |o|
-              options[:line_number] = o
+            parser.on_tail('-h', '--help', "You're looking at it.") do 
+              puts parser
+              exit
             end
 
-            parser.on('-e', '--example PATTERN', "Run examples whose full descriptions match this pattern",
-                    "(PATTERN is compiled into a Ruby regular expression)") do |o|
-              options[:full_description] = /#{o}/
+            parser.on('-I DIRECTORY', 'specify $LOAD_PATH directory (may be used more than once)') do |dir|
+              options[:libs] ||= []
+              options[:libs] << dir
+            end
+
+            parser.on('-l', '--line_number LINE', 'Specify the line number of a single example to run') do |o|
+              options[:line_number] = o
             end
 
             parser.on('-o', '--options PATH', 'Read configuration options from a file path.  (Defaults to spec/spec.parser)') do |o|
@@ -86,19 +104,6 @@ def parser(options)
             parser.on('-p', '--profile', 'Enable profiling of examples with output of the top 10 slowest examples') do |o|
               options[:profile_examples] = o
             end
-
-            parser.on('-b', '--backtrace', 'Enable full backtrace') do |o|
-              options[:full_backtrace] = true
-            end
-
-            parser.on('-d', '--debug', 'Enable debugging') do |o|
-              options[:debug] = true
-            end
-
-            parser.on_tail('-h', '--help', "You're looking at it.") do 
-              puts parser
-              exit
-            end
           end
         end
       end

rspec-core.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
   s.files = [
     ".document",
      ".gitignore",
+     ".rspec",
      ".treasure_map.rb",
      "License.txt",
      "README.markdown",
@@ -133,7 +134,7 @@ Gem::Specification.new do |s|
      "script/console",
      "spec/autotest/failed_results_re_spec.rb",
      "spec/autotest/rspec_spec.rb",
-     "spec/rspec/core/config_options_spec.rb",
+     "spec/rspec/core/configuration_options_spec.rb",
      "spec/rspec/core/configuration_spec.rb",
      "spec/rspec/core/example_group_spec.rb",
      "spec/rspec/core/example_spec.rb",
@@ -181,7 +182,7 @@ Gem::Specification.new do |s|
   s.test_files = [
     "spec/autotest/failed_results_re_spec.rb",
      "spec/autotest/rspec_spec.rb",
-     "spec/rspec/core/config_options_spec.rb",
+     "spec/rspec/core/configuration_options_spec.rb",
      "spec/rspec/core/configuration_spec.rb",
      "spec/rspec/core/example_group_spec.rb",
      "spec/rspec/core/example_spec.rb",

spec/rspec/core/configuration_options_spec.rb

@@ -19,6 +19,15 @@ def options_from_args(*args)
     end
   end
 
+  describe 'load path additions' do
+    example "-I parses like it does w/ ruby command" do
+      options_from_args('-I', 'a_dir').should include(:libs => ['a_dir'])
+    end
+    example "-I can be used more than once" do
+      options_from_args('-I', 'dir_1', '-I', 'dir_2').should include(:libs => ['dir_1','dir_2'])
+    end
+  end
+
   describe  'formatter' do
     example '-f or --formatter with an argument should parse' do
       options_from_args('--formatter', 'd').should include(:formatter => 'd')

spec/rspec/core/configuration_spec.rb

@@ -4,7 +4,7 @@ module Rspec::Core
 
   describe Configuration do
 
-    let(:config) { Configuration.new }
+    let(:config) { subject }
 
     describe "#mock_framework_class" do
       before(:each) do
@@ -237,11 +237,11 @@ def that_thing
       end
     end
 
-
     context "transactional examples" do
       it "defaults to use transactional examples" do
-          config.use_transactional_examples?.should be_true
+        config.use_transactional_examples?.should be_true
       end
+
       describe "#use_transactional_examples=" do
         it "remembers that I don't want transactional exmaples" do
           config.use_transactional_examples = false
@@ -250,6 +250,13 @@ def that_thing
       end
     end
 
+    describe "libs=" do
+      it "adds directories to the LOAD_PATH" do
+        $LOAD_PATH.should_receive(:unshift).with("a/dir")
+        config.libs = ["a/dir"]
+      end
+    end
+
   end
 
 end