Add rule to enable running Jetifier within Make against Java modules
The only case where we expect to actually enable this behavior is for
modules that are just an unpacking of a prebuilt, because those are
the only cases for which we can't conveniently just change the source
Bug: 72552006
Test: ./build/soong/scripts/diff_build_graphs.sh \
--products=aosp_arm 'build/make:work^' \
'build/make:work'
Test: cherry-pick the following patch that depends on this one and
the rest of that patch's topic, and then do `m -j jeffapp`
Change-Id: I62e231900d6d87673ddf19c7fc2686fef2828590
diff --git a/core/jetifier.mk b/core/jetifier.mk
new file mode 100644
index 0000000..305c9dd
--- /dev/null
+++ b/core/jetifier.mk
@@ -0,0 +1,34 @@
+#
+# Copyright (C) 2018 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.
+#
+
+# This file sets up the running of Jetifier
+
+# now add the rule to run jetifier
+ifeq ($(strip $(LOCAL_JETIFIER_ENABLED)),true)
+ my_jetifier_input_path := $(LOCAL_JETIFIER_INPUT_FILE)
+ my_files := $(intermediates.COMMON)/jetifier
+ my_jetifier_output_path := $(my_files)/classes-jetifier.jar
+
+$(my_jetifier_output_path) : $(my_jetifier_input_path) $(JETIFIER)
+ rm -rf $@
+ $(JETIFIER) -outputfile $@ -i $<
+
+ LOCAL_JETIFIER_OUTPUT_FILE := $(my_jetifier_output_path)
+ LOCAL_INTERMEDIATE_TARGETS += $(LOCAL_JETIFIER_OUTPUT_FILE)
+else
+ LOCAL_JETIFIER_OUTPUT_FILE := $(LOCAL_JETIFIER_INPUT_FILE)
+endif
+