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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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.
package com.google.devtools.build.lib.rules.java;
import static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.HOST;
import static com.google.devtools.build.lib.packages.Attribute.attr;
import static com.google.devtools.build.lib.packages.BuildType.LABEL;
import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
import com.google.devtools.build.lib.Constants;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
import com.google.devtools.build.lib.packages.Attribute;
import com.google.devtools.build.lib.packages.AttributeMap;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleClass.Builder;
import com.google.devtools.build.lib.packages.RuleClass.Builder.RuleClassType;
/**
* A base rule for libraries which can provide proguard specs.
*/
public final class ProguardLibraryRule implements RuleDefinition {
@Override
public RuleClass build(Builder builder, final RuleDefinitionEnvironment environment) {
return builder
/* <!-- #BLAZE_RULE($proguard_library).ATTRIBUTE(proguard_specs) -->
Files to be used as Proguard specification.
${SYNOPSIS}
These will describe the set of specifications to be used by Proguard. If specified,
they will be added to any <code>android_binary</code> target depending on this library.
The files included here must only have idempotent rules, namely -dontnote, -dontwarn,
assumenosideeffects, and rules that start with -keep. Other options can only appear in
<code>android_binary</code>'s proguard_specs, to ensure non-tautological merges.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("proguard_specs", LABEL_LIST).legacyAllowAnyFileType())
.add(attr("$proguard_whitelister", LABEL).cfg(HOST).exec().value(
new Attribute.ComputedDefault() {
@Override
public Object getDefault(AttributeMap rule) {
return rule.isAttributeValueExplicitlySpecified("proguard_specs")
? environment.getLabel(
Constants.TOOLS_REPOSITORY + "//tools/jdk:proguard_whitelister")
: null;
}
}))
.build();
}
@Override
public Metadata getMetadata() {
return RuleDefinition.Metadata.builder()
.name("$proguard_library")
.type(RuleClassType.ABSTRACT)
.build();
}
}
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