add Script class

lib/rscons.rb

@@ -4,6 +4,7 @@ require_relative "rscons/builder"
 require_relative "rscons/cache"
 require_relative "rscons/environment"
 require_relative "rscons/job_set"
+require_relative "rscons/script"
 require_relative "rscons/threaded_command"
 require_relative "rscons/varset"
 require_relative "rscons/version"

lib/rscons/script.rb

@@ -0,0 +1,27 @@
+module Rscons
+
+  # The Script class encapsulates the state of a build script. It also provides
+  # the DSL for the build script to use.
+  class Script
+
+    class << self
+
+      # Load a script from the specified file.
+      #
+      # @param path [String]
+      #   File name of the rscons script to load.
+      #
+      # @return [Script]
+      #   The loaded script state.
+      def load(path)
+        script_contents = File.read(path, mode: "rb")
+        script = Script.new
+        script.instance_eval(script_contents, path, 1)
+        script
+      end
+
+    end
+
+  end
+
+end