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