Adds support for symlinks as seedfiles

lib/sprig/source.rb

@@ -67,7 +67,7 @@ def initialize(table_name)
       end
 
       def file
-        File.new(seed_directory.join(filename))
+        File.new(filepath)
       end
 
       private
@@ -78,6 +78,15 @@ def filename
         available_files.detect {|name| name =~ /^#{table_name}\./ } || file_not_found
       end
 
+      def filepath
+        path = seed_directory.join(filename)
+        if File.symlink?(path)
+          File.readlink(path)
+        else
+          path
+        end
+      end
+
       def available_files
         Dir.entries(seed_directory)
       end

spec/sprig_spec.rb

@@ -53,6 +53,23 @@
     end
   end
 
+  context "with a symlinked file" do
+    let(:env) { Rails.env }
+
+    around do |example|
+      `ln -s ./spec/fixtures/seeds/#{env}/posts.yml ./spec/fixtures/db/seeds/#{env}`
+      example.call
+      `rm ./spec/fixtures/db/seeds/#{env}/posts.yml`
+    end
+
+    it "seeds the db" do
+      sprig [Post]
+
+      Post.count.should == 1
+      Post.pluck(:title).should =~ ['Yaml title']
+    end
+  end
+
   context "with a google spreadsheet" do
     it "seeds the db", :vcr => { :cassette_name => 'google_spreadsheet_json_posts' } do
       sprig [