pass env to Cache#up_to_date?() and #register_build() instead of user_deps

lib/rscons/environment.rb

@@ -151,7 +151,6 @@ module Rscons
           result = run_builder(@targets[target][:builder],
                                target,
                                @targets[target][:source],
-                               @user_deps[target] || [],
                                cache,
                                @targets[target][:vars] || {})
           unless result
@@ -232,6 +231,12 @@ module Rscons
       @user_deps[target] = (@user_deps[target] + user_deps).uniq
     end
 
+    # Return the list of user dependencies for a given target, or +nil+ for
+    # none.
+    def get_user_deps(target)
+      @user_deps[target]
+    end
+
     # Build a list of source files into files containing one of the suffixes
     # given by suffixes.
     # This method is used internally by RScons builders.
@@ -250,7 +255,7 @@ module Rscons
             converted_fname = get_build_fname(source, suffix)
             builder = @builders.values.find { |b| b.produces?(converted_fname, source, self) }
             if builder
-              converted = run_builder(builder, converted_fname, [source], [], cache, vars)
+              converted = run_builder(builder, converted_fname, [source], cache, vars)
               return nil unless converted
               break
             end
@@ -267,19 +272,18 @@ module Rscons
     # @param cache [Cache] The Cache.
     # @param vars [Hash] Extra variables to pass to the builder.
     # Return the result of the builder's run() method.
-    def run_builder(builder, target, sources, user_deps, cache, vars)
+    def run_builder(builder, target, sources, cache, vars)
       vars = @varset.merge(vars)
       @build_hooks.each do |build_hook_block|
         build_operation = {
           builder: builder,
           target: target,
           sources: sources,
-          user_deps: user_deps,
           vars: vars,
         }
         build_hook_block.call(build_operation)
       end
-      builder.run(target, sources, user_deps, cache, self, vars)
+      builder.run(target, sources, cache, self, vars)
     end
 
     # Parse dependencies for a given target from a Makefile.