support line number appended to path

features/command_line/line_number_appended_to_path.feature

@@ -0,0 +1,39 @@
+Feature: line number appended to file path
+
+  As an RSpec user
+  I want to run one example identified by the 
+    line number appended to the filepath
+
+  Background:
+    Given a file named "example_spec.rb" with:
+      """
+      describe "a group" do
+
+        it "has a first example" do
+
+        end
+        
+        it "has a second example" do
+
+        end
+        
+      end
+      """
+
+  Scenario: two examples - both examples from the group declaration
+    When I run "spec example_spec.rb:1 --format doc"
+    Then the stdout should match "2 examples, 0 failures"
+    And the stdout should match "has a second example"
+    And the stdout should match "has a first example"
+
+  Scenario: two examples - first example on declaration line
+    When I run "spec example_spec.rb:3 --format doc"
+    Then the stdout should match "1 example, 0 failures"
+    And the stdout should match "has a first example"
+    But the stdout should not match "has a second example"
+
+  Scenario: two examples - second example on declaration line
+    When I run "spec example_spec.rb:7 --format doc"
+    Then the stdout should match "1 example, 0 failures"
+    And the stdout should match "has a second example"
+    But the stdout should not match "has a first example"

lib/rspec/core/configuration.rb

@@ -137,13 +137,16 @@ def files_to_run
       end
 
       def files_or_directories_to_run=(*files)
+        p files
         options[:files_to_run] = files.flatten.inject([]) do |result, file|
           if File.directory?(file)
             filename_pattern.split(",").each do |pattern|
               result += Dir[File.expand_path("#{file}/#{pattern.strip}")]
             end
           else
-            result << file
+            file =~ /([^:]*):?(\d+)?/
+            self.line_number = $2 if $2
+            result << $1
           end
           result
         end

spec/rspec/core/configuration_spec.rb

@@ -102,6 +102,15 @@
 
     end
 
+    context "with line number" do
+
+      it "assigns the line number as the filter" do
+        @config.files_or_directories_to_run = "path/to/a_spec.rb:37"
+        @config.filter.should == {:line_number => 37}
+      end
+
+    end
+
   end
 
   describe "include" do