Update Android.mk to support file_contexts.bin

This change supports external/libselinux changes to implement
PCRE formatted binary file_contexts and general_file_contexts.bin
files.

The $(intermediates) directory will contain the original text file
(that is no longer used on the device) with a .tmp extension as well
as the .bin file to aid analysis.

A CleanSpec.mk file is added to remove the old file_contexts file.

Change-Id: I75a781100082c23536f70ce3603f7de42408b5ba
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>

Android.mk

@@ -148,7 +148,7 @@ built_general_sepolicy := $(LOCAL_BUILT_MODULE)
 ##################################
 include $(CLEAR_VARS)
 
-LOCAL_MODULE := file_contexts
+LOCAL_MODULE := file_contexts.bin
 LOCAL_MODULE_CLASS := ETC
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
@@ -161,32 +161,44 @@ ifeq (address,$(strip $(SANITIZE_TARGET)))
 endif
 all_fc_files := $(call build_policy, $(all_fc_files))
 
-$(LOCAL_BUILT_MODULE): PRIVATE_SEPOLICY := $(built_sepolicy)
+file_contexts.tmp := $(intermediates)/file_contexts.tmp
-$(LOCAL_BUILT_MODULE): PRIVATE_FC_FILES := $(all_fc_files)
+$(file_contexts.tmp): PRIVATE_SEPOLICY := $(built_sepolicy)
-$(LOCAL_BUILT_MODULE): PRIVATE_ADDITIONAL_M4DEFS := $(LOCAL_ADDITIONAL_M4DEFS)
+$(file_contexts.tmp): PRIVATE_FC_FILES := $(all_fc_files)
-$(LOCAL_BUILT_MODULE): $(all_fc_files) $(built_sepolicy) $(HOST_OUT_EXECUTABLES)/checkfc
+$(file_contexts.tmp): PRIVATE_ADDITIONAL_M4DEFS := $(LOCAL_ADDITIONAL_M4DEFS)
+$(file_contexts.tmp): $(all_fc_files) $(built_sepolicy) $(HOST_OUT_EXECUTABLES)/checkfc
 	@mkdir -p $(dir $@)
 	$(hide) m4 -s $(PRIVATE_ADDITIONAL_M4DEFS) $(PRIVATE_FC_FILES) > $@
 	$(hide) $(HOST_OUT_EXECUTABLES)/checkfc $(PRIVATE_SEPOLICY) $@
 
+$(LOCAL_BUILT_MODULE): $(file_contexts.tmp) $(HOST_OUT_EXECUTABLES)/sefcontext_compile
+	@mkdir -p $(dir $@)
+	$(hide) $(HOST_OUT_EXECUTABLES)/sefcontext_compile -o $@ $<
+
 built_fc := $(LOCAL_BUILT_MODULE)
 all_fc_files :=
+file_contexts.tmp :=
 
 ##################################
 include $(CLEAR_VARS)
 
-LOCAL_MODULE := general_file_contexts
+LOCAL_MODULE := general_file_contexts.bin
 LOCAL_MODULE_CLASS := ETC
 LOCAL_MODULE_TAGS := tests
 
 include $(BUILD_SYSTEM)/base_rules.mk
 
-$(LOCAL_BUILT_MODULE): PRIVATE_SEPOLICY := $(built_general_sepolicy)
+general_file_contexts.tmp := $(intermediates)/general_file_contexts.tmp
-$(LOCAL_BUILT_MODULE): $(addprefix $(LOCAL_PATH)/, file_contexts) $(built_general_sepolicy) $(HOST_OUT_EXECUTABLES)/checkfc
+$(general_file_contexts.tmp): PRIVATE_SEPOLICY := $(built_general_sepolicy)
+$(general_file_contexts.tmp): $(addprefix $(LOCAL_PATH)/, file_contexts) $(built_general_sepolicy) $(HOST_OUT_EXECUTABLES)/checkfc
 	@mkdir -p $(dir $@)
 	$(hide) m4 -s $< > $@
 	$(hide) $(HOST_OUT_EXECUTABLES)/checkfc $(PRIVATE_SEPOLICY) $@
 
+$(LOCAL_BUILT_MODULE): $(general_file_contexts.tmp) $(HOST_OUT_EXECUTABLES)/sefcontext_compile
+	@mkdir -p $(dir $@)
+	$(hide) $(HOST_OUT_EXECUTABLES)/sefcontext_compile -o $@ $<
+
+general_file_contexts.tmp :=
 GENERAL_FILE_CONTEXTS := $(LOCAL_BUILT_MODULE)
 
 ##################################

CleanSpec.mk

@@ -0,0 +1,52 @@
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# If you don't need to do a full clean build but would like to touch
+# a file or delete some intermediate files, add a clean step to the end
+# of the list.  These steps will only be run once, if they haven't been
+# run before.
+#
+# E.g.:
+#     $(call add-clean-step, touch -c external/sqlite/sqlite3.h)
+#     $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libz_intermediates)
+#
+# Always use "touch -c" and "rm -f" or "rm -rf" to gracefully deal with
+# files that are missing or have been moved.
+#
+# Use $(PRODUCT_OUT) to get to the "out/target/product/blah/" directory.
+# Use $(OUT_DIR) to refer to the "out" directory.
+#
+# If you need to re-do something that's already mentioned, just copy
+# the command and add it to the bottom of the list.  E.g., if a change
+# that you made last week required touching a file and a change you
+# made today requires touching the same file, just copy the old
+# touch step and add it to the end of the list.
+#
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
+
+# For example:
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/AndroidTests_intermediates)
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/core_intermediates)
+#$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
+#$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
+
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
+
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/file_contexts)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/file_contexts)