remove some builder-tracked fields from the build_operation Hash

build_tests/simple/phony_target.rb

@@ -1,12 +1,11 @@
 build do
   Environment.new do |env|
     env.add_builder(:Checker) do |params|
-      target, sources, cache, env, vars = params.values_at(:target, :sources, :cache, :env, :vars)
-      unless cache.up_to_date?(target, :Checker, sources, env)
-        puts "Checker #{sources.first}" if env.echo != :off
-        cache.register_build(target, :Checker, sources, env)
+      unless @cache.up_to_date?(@target, :Checker, @sources, @env)
+        puts "Checker #{@sources.first}" if @env.echo != :off
+        @cache.register_build(@target, :Checker, @sources, @env)
       end
-      target
+      @target
     end
     env.Program("simple.exe", "simple.c")
     env.Checker(:checker, "simple.exe")

build_tests/simple/threading.rb

@@ -3,7 +3,7 @@ class ThreadedTestBuilder < Rscons::Builder
     command = ["ruby", "-e", %[sleep 1]]
     Rscons::ThreadedCommand.new(
       command,
-      short_description: "ThreadedTestBuilder #{options[:target]}")
+      short_description: "ThreadedTestBuilder #{@target}")
   end
   def finalize(options)
     true
@@ -12,9 +12,9 @@ end
 
 class NonThreadedTestBuilder < Rscons::Builder
   def run(options)
-    puts "NonThreadedTestBuilder #{options[:target]}"
+    puts "NonThreadedTestBuilder #{@target}"
     sleep 1
-    options[:target]
+    @target
   end
 end