pass Builder object to build hooks instead of build_operation Hash

build_tests/typical/build_hooks.rb

@@ -1,11 +1,11 @@
 build do
   Environment.new(echo: :command) do |env|
     env.append('CPPPATH' => Rscons.glob('src/**/*/'))
-    env.add_build_hook do |build_op|
-      if File.basename(build_op[:target]) == "one.o"
-        build_op[:vars]["CFLAGS"] << "-O1"
-      elsif File.basename(build_op[:target]) == "two.o"
-        build_op[:vars]["CFLAGS"] << "-O2"
+    env.add_build_hook do |builder|
+      if File.basename(builder.target) == "one.o"
+        builder.vars["CFLAGS"] << "-O1"
+      elsif File.basename(builder.target) == "two.o"
+        builder.vars["CFLAGS"] << "-O2"
       end
     end
     env.Program('build_hook.exe', Rscons.glob('src/**/*.c'))

build_tests/typical/build_hooks_override_vars.rb

@@ -1,14 +1,14 @@
 build do
   Environment.new(echo: :command) do |env|
     env.append('CPPPATH' => Rscons.glob('src/**'))
-    env.add_build_hook do |build_op|
-      if build_op[:builder].name == "Object" && build_op[:sources].first =~ %r{one\.c}
-        build_op[:vars]["CFLAGS"] << "-O1"
-        build_op[:sources] = ['src/two/two.c']
-      elsif build_op[:builder].name == "Object" && build_op[:target] =~ %r{two\.o}
-        new_vars = build_op[:vars].clone
+    env.add_build_hook do |builder|
+      if builder.name == "Object" && builder.sources.first =~ %r{one\.c}
+        builder.vars["CFLAGS"] << "-O1"
+        builder.sources = ['src/two/two.c']
+      elsif builder.name == "Object" && builder.target =~ %r{two\.o}
+        new_vars = builder.vars.clone
         new_vars["CFLAGS"] << "-O2"
-        build_op[:vars] = new_vars
+        builder.vars = new_vars
       end
     end
     env.Object('one.o', 'src/one/one.c')

build_tests/typical/post_build_hook_expansion.rb

@@ -2,8 +2,8 @@ build do
   Environment.new do |env|
     env["CPPPATH"] << "src/two"
     env.Object("one.o", "src/one/one.c")
-    env.add_post_build_hook do |build_op|
-      if build_op[:target] == "one.o"
+    env.add_post_build_hook do |builder|
+      if builder.target == "one.o"
         env["MODULE"] = "two"
         env.Object("${MODULE}.o", "src/${MODULE}/${MODULE}.c")
       end