add functionality to add builders to an Environment

lib/rscons.rb

@@ -2,7 +2,15 @@ require "rscons/builder"
 require "rscons/environment"
 require "rscons/version"
 
+require "rscons/monkey/module"
+
+# default builders
+require "rscons/builders/cc"
+require "rscons/builders/program"
+
 module Rscons
   DEFAULT_BUILDERS = [
+    CC,
+    Program,
   ]
 end

lib/rscons/builders/cc.rb

@@ -0,0 +1,4 @@
+module Rscons
+  class CC < Builder
+  end
+end

lib/rscons/builders/program.rb

@@ -0,0 +1,4 @@
+module Rscons
+  class Program < Builder
+  end
+end

lib/rscons/environment.rb

@@ -21,9 +21,41 @@ module Rscons
     #   which are lowercase symbols (such as :echo).
     def initialize(variables = {})
       @variables = variables
+      @targets = {}
+      @builders = {}
+      @variables[:exclude_builders] ||= []
+      unless @variables[:exclude_builders] == :all
+        exclude_builders = Set.new(@variables[:exclude_builders] || [])
+        DEFAULT_BUILDERS.each do |builder_class|
+          unless exclude_builders.include?(builder_class.short_name)
+            add_builder(builder_class)
+          end
+        end
+      end
+      (@variables[:builders] || []).each do |builder_class|
+        add_builder(builder_class)
+      end
+    end
+
+    def add_builder(builder_class)
+      @builders[builder_class.short_name] = builder_class
     end
 
     def process
     end
+
+    alias_method :orig_method_missing, :method_missing
+    def method_missing(method, *args)
+      if @builders.has_key?(method.to_s)
+        target, source, *rest = args
+        @targets[target] = {
+          builder: method.to_s,
+          source: source,
+          args: rest,
+        }
+      else
+        orig_method_missing(method, *args)
+      end
+    end
   end
 end

lib/rscons/monkey/module.rb

@@ -0,0 +1,5 @@
+class Module
+  def short_name
+    name.split(':').last
+  end
+end