added rake :graph task

generates and opens (os x) a dependency graph via the rubydeps gem.

.gitignore

@@ -2,6 +2,7 @@
 .DS_Store
 doc
 coverage
+graph
 pkg
 *~
 *.rbc

Gemfile

@@ -1,17 +1,18 @@
 source 'https://rubygems.org'
 gemspec
 
-group :development do
-  # profiling
-  #gem 'method_profiler', require: false
-  #gem 'ruby-prof',       require: false  # does not work on jruby!
+# profiling
+#gem 'method_profiler', require: false
+#gem 'ruby-prof',       require: false  # does not work on jruby!
 
-  # coverage
-  gem 'simplecov', require: false
-  gem 'coveralls', require: false
+# coverage
+gem 'simplecov', require: false
+gem 'coveralls', require: false
 
-  # debugging
-  #gem 'debugger',  require: false  # don't install on travis!
+# dependencies
+gem 'rubydeps',  require: false
 
-  gem 'fuubar'
-end
+# debugging
+#gem 'debugger',  require: false  # don't install on travis!
+
+gem 'fuubar'

Rakefile

@@ -3,5 +3,19 @@ require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new
 
+desc 'Generate a dependency graph'
+task :graph do
+  system <<-BASH
+    rm -rf graph
+    mkdir graph
+    GRAPH=true rspec
+    mv rubydeps.dump graph
+    cd graph
+    rubydeps --path_filter='lib/savon'
+    dot -Tsvg rubydeps.dot > rubydeps.svg
+    open -a 'Google Chrome' rubydeps.svg
+  BASH
+end
+
 task default: :spec
 task test: :spec

spec/spec_helper.rb

@@ -19,6 +19,11 @@
   logger.level = :debug
 end
 
+if ENV['GRAPH']
+  require 'rubydeps'
+  Rubydeps.start
+end
+
 require 'equivalent-xml'
 
 support_files = File.expand_path('spec/support/**/*.rb')