Keep the public API as small as we can

lib/git_tracker/standalone.rb

@@ -35,6 +35,16 @@ def build(io)
       io
     end
 
+    def ruby_executable
+      if File.executable? '/usr/bin/ruby' then '/usr/bin/ruby'
+      else
+        require 'rbconfig'
+        File.join(RbConfig::CONFIG['bindir'], RbConfig::CONFIG['ruby_install_name'])
+      end
+    end
+
+    private
+
     def inline_source(code, io)
       code.each_line do |line|
         io << line unless comment?(line) || require_own_file?(line)
@@ -60,13 +70,5 @@ def each_source_file
       end
     end
 
-    def ruby_executable
-      if File.executable? '/usr/bin/ruby' then '/usr/bin/ruby'
-      else
-        require 'rbconfig'
-        File.join(RbConfig::CONFIG['bindir'], RbConfig::CONFIG['ruby_install_name'])
-      end
-    end
-
   end
 end