Running jarjar on Java resources.

Before this change, Java resources are added as a separate step
(add-java-resources-to-package) after dex is run, so jarjar isn't run on
the resource files.
With this change, we add Java resources immediately after we call javac,
so jarjar is run on the resource files (the module's own resource, as
well as resources carried by static Java libraries).
When we generate the final apk/jar, we use the jarjar'ed jar as the
inital pacakge file, with class files and empty folders removed.

(cherry-picked from commit 140274707e)

Bug: 18837479
Change-Id: I15ecf282bfb65fd53dd03fbd03dd4c71927c186a

core/definitions.mk

@@ -1663,6 +1663,7 @@ $(if $(PRIVATE_JAR_MANIFEST), \
         jar -cfm $@ $(dir $@)/manifest.mf \
             -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) ., \
     $(hide) jar -cf $@ -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) .)
+$(if $(PRIVATE_EXTRA_JAR_ARGS),$(call add-java-resources-to,$@))
 endef
 
 define transform-java-to-classes.jar
@@ -1723,6 +1724,7 @@ $(if $(PRIVATE_JAR_MANIFEST), \
         jar -cfm $@ $(dir $@)/manifest.mf \
             -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) ., \
     $(hide) jar -cf $@ -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) .)
+$(if $(PRIVATE_EXTRA_JAR_ARGS),$(call add-java-resources-to,$@))
 $(hide) mv $(PRIVATE_CLASS_INTERMEDIATES_DIR)/newstamp $(PRIVATE_CLASS_INTERMEDIATES_DIR)/stamp
 endef
 
@@ -1770,6 +1772,15 @@ $(hide) zip -qd $@ dummy
 $(hide) rm $(dir $@)dummy
 endef
 
+# Copy an arhchive file and delete any class files and empty folders inside.
+# $(1): the source archive file.
+# $(2): the destination archive file.
+define initialize-package-file
+@mkdir -p $(dir $(2))
+$(hide) cp -f $(1) $(2)
+$(hide) zip -qd $(2) "*.class" "*/" || true # Ignore the error when nothing to delete.
+endef
+
 #TODO: we kinda want to build different asset packages for
 #      different configurations, then combine them later (or something).
 #      Per-locale, etc.
@@ -1821,24 +1832,12 @@ $(hide) zip -qj $@ $(dir $(PRIVATE_DEX_FILE))classes*.dex
 endef
 
 # Add java resources added by the current module.
+# $(1) destination package
 #
-define add-java-resources-to-package
-$(call dump-words-to-file, $(PRIVATE_EXTRA_JAR_ARGS), $(dir $@)jar-arg-list)
-$(hide) jar uf $@ @$(dir $@)jar-arg-list
-@rm -f $(dir $@)jar-arg-list
-endef
-
-# Add java resources carried by static Java libraries.
-#
-define add-carried-java-resources
-$(hide) if [ -d $(PRIVATE_CLASS_INTERMEDIATES_DIR) ] ; then \
-    java_res_jar_flags=$$(find $(PRIVATE_CLASS_INTERMEDIATES_DIR) -type f -a -not -name "*.class" \
-        | sed -e "s?^$(PRIVATE_CLASS_INTERMEDIATES_DIR)/? -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) ?"); \
-    if [ -n "$$java_res_jar_flags" ] ; then \
-        echo $$java_res_jar_flags >$(dir $@)java_res_jar_flags; \
-        jar uf $@ $$java_res_jar_flags; \
-    fi; \
-fi
+define add-java-resources-to
+$(call dump-words-to-file, $(PRIVATE_EXTRA_JAR_ARGS), $(1).jar-arg-list)
+$(hide) jar uf $(1) @$(1).jar-arg-list
+@rm -f $(1).jar-arg-list
 endef
 
 # Sign a package using the specified key/cert.
@@ -1882,7 +1881,6 @@ endef
 define transform-host-java-to-package
 @echo "host Java: $(PRIVATE_MODULE) ($(PRIVATE_CLASS_INTERMEDIATES_DIR))"
 $(call compile-java,$(HOST_JAVAC),$(PRIVATE_BOOTCLASSPATH))
-$(if $(PRIVATE_EXTRA_JAR_ARGS), $(call add-java-resources-to-package))
 endef
 
 ###########################################################

core/host_dalvik_java_library.mk

@@ -101,13 +101,10 @@ $(built_dex): $(full_classes_jar) $(DX)
 	$(transform-classes.jar-to-dex)
 
 $(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
+$(LOCAL_BUILT_MODULE): PRIVATE_SOURCE_ARCHIVE := $(full_classes_jarjar_jar)
 $(LOCAL_BUILT_MODULE): $(built_dex) $(java_resource_sources)
 	@echo "Host Jar: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
+	$(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@)
 	$(add-dex-to-package)
-	$(add-carried-java-resources)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
-endif
 
 USE_CORE_LIB_BOOTCLASSPATH :=

core/java_library.mk

@@ -58,9 +58,6 @@ $(common_javalib.jar) : $(full_classes_jar)
 endif
 	@echo "target Static Jar: $(PRIVATE_MODULE) ($@)"
 	$(copy-file-to-target)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
-endif
 
 $(LOCAL_BUILT_MODULE): $(common_javalib.jar)
 	$(copy-file-to-target)
@@ -68,14 +65,11 @@ $(LOCAL_BUILT_MODULE): $(common_javalib.jar)
 else # !LOCAL_IS_STATIC_JAVA_LIBRARY
 
 $(common_javalib.jar): PRIVATE_DEX_FILE := $(built_dex)
+$(common_javalib.jar): PRIVATE_SOURCE_ARCHIVE := $(full_classes_jarjar_jar)
 $(common_javalib.jar) : $(built_dex) $(java_resource_sources)
 	@echo "target Jar: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
+	$(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@)
 	$(add-dex-to-package)
-	$(add-carried-java-resources)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
-endif
 
 ifdef LOCAL_DEX_PREOPT
 ifneq ($(dexpreopt_boot_jar_module),) # boot jar

core/package_internal.mk

@@ -324,7 +324,12 @@ endif # LOCAL_NO_STANDARD_LIBRARIES
 
 ifneq ($(full_classes_jar),)
 $(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
+# Use the jarjar processed arhive as the initial package file.
+$(LOCAL_BUILT_MODULE): PRIVATE_SOURCE_ARCHIVE := $(full_classes_jarjar_jar)
 $(LOCAL_BUILT_MODULE): $(built_dex)
+else
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE :=
+$(LOCAL_BUILT_MODULE): PRIVATE_SOURCE_ARCHIVE :=
 endif # full_classes_jar
 
 include $(BUILD_SYSTEM)/install_jni_libs.mk
@@ -385,17 +390,15 @@ endif
 endif
 $(LOCAL_BUILT_MODULE): $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
 	@echo "target Package: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
+	$(if $(PRIVATE_SOURCE_ARCHIVE),\
+	  $(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@),\
+	  $(create-empty-package))
 	$(add-assets-to-package)
 ifneq ($(jni_shared_libraries),)
 	$(add-jni-shared-libs-to-package)
 endif
 ifneq ($(full_classes_jar),)
 	$(add-dex-to-package)
-endif
-	$(add-carried-java-resources)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
 endif
 	$(sign-package)
 ifdef LOCAL_DEX_PREOPT