make erb rendering optional. render erb only if file extension contains '.erb.'

sinatra-contrib/lib/sinatra/config_file.rb

@@ -115,7 +115,9 @@ module Sinatra
         paths.each do |pattern|
           Dir.glob(pattern) do |file|
             $stderr.puts "loading config file '#{file}'" if logging?
-            yaml = config_for_env(YAML.load(ERB.new(IO.read(file)).result)) || {}
+            document = IO.read(file)
+            document = ERB.new(document).result if file.include?('.erb.')
+            yaml = config_for_env(YAML.load(document)) || {}
             yaml.each_pair do |key, value|
               for_env = config_for_env(value)
               set key, for_env unless value and for_env.nil? and respond_to? key

sinatra-contrib/sinatra-contrib.gemspec

@@ -55,11 +55,11 @@ Gem::Specification.new do |s|
     "lib/sinatra/test_helpers.rb",
     "sinatra-contrib.gemspec",
     "spec/capture_spec.rb",
+    "spec/config_file/key_value.erb.yml",
     "spec/config_file/key_value.yml",
     "spec/config_file/key_value_override.yml",
     "spec/config_file/missing_env.yml",
     "spec/config_file/with_envs.yml",
-    "spec/config_file/with_erb.yml",
     "spec/config_file/with_nested_envs.yml",
     "spec/config_file_spec.rb",
     "spec/content_for/different_key.erb",

sinatra-contrib/spec/config_file_spec.rb

@@ -24,7 +24,7 @@ describe Sinatra::ConfigFile do
   end
 
   it 'should render options in ERB tags' do
-    config_file 'with_erb.yml'
+    config_file 'key_value.erb.yml'
     settings.foo.should == "bar"
     settings.something.should == 42
     settings.nested['a'].should == 1