Add Rake task that detects spec groups intereference

Rakefile

@@ -6,7 +6,7 @@ require 'strokedb'; require 'core_ext'
 require 'task/echoe'
 Echoe.taskify do
   Dir['task/**/*.task'].each {|t| load t}
-  
+
   namespace :echoe do
     Echoe.new('strokedb', StrokeDB::VERSION) do |g|
       g.author         = ['Yurii Rashkovskii', 'Oleg Andreev']
@@ -19,30 +19,30 @@ Echoe.taskify do
   time), it scales infinitely, it even allows free versioning and integrates
   perfectly with Ruby applications.
   EOF
-    
+
       g.platform       = Gem::Platform::RUBY
       g.dependencies   = ['diff-lcs >= 1.1.2', 'uuidtools >= 1.0.3', 'json >= 1.1.2']
-    
+
       g.manifest_name  = 'meta/MANIFEST'
       g.ignore_pattern = /(^\.git|^.DS_Store$|^meta|^test\/storages|^examples\/(.*).strokedb|^bugs)/
       g.executable_pattern = 'bin/strokedb'
     end
-    
+
     desc 'tests packaged files to ensure they are all present'
     task :verify => :package do
       # An error message will be displayed if files are missing
       if system %(ruby -e "require 'rubygems'; require 'pkg/strokedb-#{StrokeDB::VERSION}/strokedb'")
         puts "\nThe library files are present"
       end
     end
-    
+
     desc 'Clean tree, update manifest, and install gem'
     task :magic => [:clean, :manifest, :install]
   end
-  
+
   desc 'Check what\'s up in this mug'
   task :sup => [:'rcov:run', :'rcov:verify']
-  
+
   # Developers: Run this before commiting!
   desc 'Check everything over before commiting!'
   task :aok => [:'rcov:verbose', :'rcov:strict', :'rcov:open',
@@ -57,4 +57,29 @@ task :cruise => [:'ditz:html', :'rdoc:html', :'rcov:bw', :'rcov:verify']
 task :default => :list
 task :list do
   system 'rake -T'
-end
+end
+
+
+desc "Detects interfering spec group pairs. By Michael Klishin."
+task :interfers do
+file = ENV['SPECFILE']
+
+  all_specs = Dir.glob(File.dirname(__FILE__) + "/spec/**/*_spec.rb") - [File.expand_path(file)]
+  all_specs.each do |specfile|
+    pair = "#{specfile} #{file}"
+    output = `spec -c #{pair}`
+
+    if output =~ /0\sfailures/
+      print "."
+      STDOUT.flush
+    else
+      puts "\n\nACHTUNG! Coupled spec groups detected! Fuck! Shit! You should have this fixed ASAP! AAAAA!!!"
+      puts "spec -c #{pair}"
+      puts "Run says \n\n"
+      puts output
+    end
+  end
+
+  puts
+  puts
+end