94 lines
3.3 KiB
Java
94 lines
3.3 KiB
Java
/*
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* Copyright (C) 2020 The Dagger Authors.
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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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*/
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package dagger.android.internal.proguard;
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import static javax.tools.StandardLocation.CLASS_OUTPUT;
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import com.google.auto.service.AutoService;
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import java.io.IOException;
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import java.io.Writer;
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import java.util.Set;
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import javax.annotation.processing.AbstractProcessor;
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import javax.annotation.processing.Filer;
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import javax.annotation.processing.Processor;
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import javax.annotation.processing.RoundEnvironment;
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import javax.annotation.processing.SupportedAnnotationTypes;
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import javax.lang.model.SourceVersion;
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import javax.lang.model.element.TypeElement;
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/**
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* An {@linkplain Processor annotation processor} to generate dagger-android's specific proguard
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* needs. This is only intended to run over the dagger-android project itself, as the alternative is
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* to create an intermediary java_library for proguard rules to be consumed by the project.
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*
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* <p>Basic structure looks like this:
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*
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* <pre><code>
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* resources/META-INF/com.android.tools/proguard/dagger-android.pro
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* resources/META-INF/com.android.tools/r8/dagger-android.pro
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* resources/META-INF/proguard/dagger-android.pro
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* </code></pre>
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*/
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@AutoService(Processor.class)
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@SupportedAnnotationTypes(ProguardProcessor.GENERATE_RULES_ANNOTATION_NAME)
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public final class ProguardProcessor extends AbstractProcessor {
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static final String GENERATE_RULES_ANNOTATION_NAME =
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"dagger.android.internal.GenerateAndroidInjectionProguardRules";
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@Override
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public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
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roundEnv
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.getElementsAnnotatedWith(
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processingEnv.getElementUtils().getTypeElement(GENERATE_RULES_ANNOTATION_NAME))
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.forEach(element -> generate());
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return false;
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}
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private void generate() {
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Filer filer = processingEnv.getFiler();
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String errorProneRule = "-dontwarn com.google.errorprone.annotations.**\n";
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String androidInjectionKeysRule =
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"-identifiernamestring class dagger.android.internal.AndroidInjectionKeys {\n"
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+ " java.lang.String of(java.lang.String);\n"
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+ "}\n";
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writeFile(filer, "com.android.tools/proguard", errorProneRule);
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writeFile(filer, "com.android.tools/r8", errorProneRule + androidInjectionKeysRule);
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writeFile(filer, "proguard", errorProneRule);
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}
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private static void writeFile(Filer filer, String intermediatePath, String contents) {
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try (Writer writer =
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filer
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.createResource(
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CLASS_OUTPUT, "", "META-INF/" + intermediatePath + "/dagger-android.pro")
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.openWriter()) {
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writer.write(contents);
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} catch (IOException e) {
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throw new IllegalStateException(e);
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}
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}
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@Override
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public SourceVersion getSupportedSourceVersion() {
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return SourceVersion.latestSupported();
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}
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}
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