67 lines
2.6 KiB
Makefile
67 lines
2.6 KiB
Makefile
# Copyright (C) 2015 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Manages use of annotation processors.
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#
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# At the moment both the -processorpath and the -processor
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# flags must be specified in order to use annotation processors
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# as a code indexing tool that wraps javac doesn't as yet support
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# the same behaviour as standard javac with regard to use of
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# annotation processors. In particular it:
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# - doesn't default -processorpath to be the same as -classpath
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# - doesn't scan processorpath to automatically discover processors
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# - doesn't support a comma separated list of processor class names
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# on a single -processor option so need on option per class name.
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#
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# Input variables:
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#
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# PROCESSOR_LIBRARIES := <list of library names>
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# Similar to names added to LOCAL_JAVA_LIBRARIES.
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#
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# PROCESSOR_CLASSES := <list of processor class names>
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#
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# Upon exit various LOCAL_ variables have been updated and the
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# input variables have been cleared.
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# Map the library names to actual JARs.
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PROCESSOR_JARS := $(call java-lib-deps, $(PROCESSOR_LIBRARIES), true)
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# Add a javac -processorpath flag.
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LOCAL_JAVACFLAGS += -processorpath $(call normalize-path-list,$(PROCESSOR_JARS))
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# Specify only one processor class per -processor option as
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# the indexing tool does not parse the -processor value as a
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# comma separated list.
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LOCAL_JAVACFLAGS += $(foreach class,$(PROCESSOR_CLASSES),-processor $(class))
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# Create a source directory into which the code will be generated.
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GENERATED_SOURCE_DIR := $(local-generated-sources-dir)/annotation_processor_output/
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# Tell javac to generate source files in the source directory.
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LOCAL_JAVACFLAGS += -s $(GENERATED_SOURCE_DIR)
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LOCAL_GENERATED_SOURCES := $(GENERATED_SOURCE_DIR)
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# Add dependency between the jar being built and the processor jars so that
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# they are built before this one.
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LOCAL_ADDITIONAL_DEPENDENCIES += $(PROCESSOR_JARS) $(GENERATED_SOURCE_DIR)
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$(GENERATED_SOURCE_DIR):
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mkdir -p $@
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# Clean up all the extra variables to make sure that they don't escape to
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# another module.
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PROCESSOR_LIBRARIES :=
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PROCESSOR_CLASSES :=
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PROCESSOR_JARS :=
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GENERATED_SOURCE_DIR :=
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