| // 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.android; |
| |
| import com.google.devtools.build.lib.actions.Artifact; |
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.FileProvider; |
| import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode; |
| import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder; |
| import com.google.devtools.build.lib.analysis.RuleContext; |
| import com.google.devtools.build.lib.analysis.RunfilesProvider; |
| import com.google.devtools.build.lib.analysis.TransitiveInfoCollection; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSet; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder; |
| import com.google.devtools.build.lib.collect.nestedset.Order; |
| import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException; |
| import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory; |
| |
| import java.util.regex.Pattern; |
| |
| /** |
| * Implementation for the {@code android_tools_defaults_jar} rule. |
| * |
| * <p>This rule is a sad, sad way to let people depend on {@code android.jar} when an |
| * {@code android_sdk} rule is used. In an ideal world, people would say "depend on |
| * the android_jar output group of $config.android_sdk", but, alas, neither depending on labels in |
| * the configuration nor depending on a specified output group works. |
| * |
| * <p>So all this needs to be implemented manually. This rule is injected into the defaults package |
| * from {@link AndroidConfiguration.Options#getDefaultsRules()}. |
| */ |
| public class AndroidToolsDefaultsJar implements RuleConfiguredTargetFactory { |
| private static final Pattern ANDROID_JAR_BASENAME_RX = |
| Pattern.compile("android[a-zA-Z0-9_]*\\.jar$"); |
| |
| @Override |
| public ConfiguredTarget create(RuleContext ruleContext) |
| throws InterruptedException, RuleErrorException { |
| if (!ruleContext.getLabel().getPackageName().equals("tools/defaults")) { |
| // Guard against extraordinarily inquisitive individuals. |
| ruleContext.ruleError("The android_tools_defaults_jar rule should not be used in BUILD files." |
| + " It is a rule internal to the build tool."); |
| return null; |
| } |
| |
| TransitiveInfoCollection androidSdk = ruleContext.getPrerequisite(":android_sdk", Mode.TARGET); |
| AndroidSdkProvider sdkProvider = androidSdk.getProvider(AndroidSdkProvider.class); |
| Artifact androidJar = sdkProvider != null |
| ? sdkProvider.getAndroidJar() |
| : findAndroidJar(androidSdk.getProvider(FileProvider.class).getFilesToBuild()); |
| |
| NestedSet<Artifact> filesToBuild = androidJar == null |
| ? NestedSetBuilder.<Artifact>emptySet(Order.STABLE_ORDER) |
| : NestedSetBuilder.create(Order.STABLE_ORDER, androidJar); |
| |
| return new RuleConfiguredTargetBuilder(ruleContext) |
| .add(RunfilesProvider.class, RunfilesProvider.EMPTY) |
| .setFilesToBuild(filesToBuild) |
| .build(); |
| } |
| |
| private static Artifact findAndroidJar(Iterable<Artifact> fullSdk) { |
| // We need to do this by sifting through all the files in the Android SDK because we need to |
| // handle the case when --android_sdk points to a plain filegroup. |
| // |
| // We can't avoid adding an android_tools_defaults_jar rule to the defaults package when this is |
| // the case, because the defaults package is constructed very early and it's not possible to get |
| // information about the rule class of the target pointed to by --android_sdk earlier, and it's |
| // doubly impossible to do redirect chasing then. |
| for (Artifact artifact : fullSdk) { |
| |
| if (ANDROID_JAR_BASENAME_RX.matcher(artifact.getExecPath().getBaseName()).matches()) { |
| return artifact; |
| } |
| } |
| |
| return null; |
| } |
| } |