| // Copyright 2017 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.BuildType.LABEL; |
| import static com.google.devtools.build.lib.skyframe.BzlLoadValue.keyForBuiltins; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.actions.Artifact; |
| import com.google.devtools.build.lib.analysis.RuleContext; |
| import com.google.devtools.build.lib.analysis.TransitiveInfoCollection; |
| import com.google.devtools.build.lib.analysis.platform.ToolchainInfo; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSet; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import com.google.devtools.build.lib.packages.Info; |
| import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException; |
| import com.google.devtools.build.lib.packages.StarlarkInfo; |
| import com.google.devtools.build.lib.packages.StarlarkInfoWithSchema; |
| import com.google.devtools.build.lib.packages.StarlarkProviderWrapper; |
| import com.google.devtools.build.lib.rules.cpp.CcInfo; |
| import com.google.devtools.build.lib.rules.cpp.LibraryToLink; |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| import javax.annotation.Nullable; |
| import net.starlark.java.eval.EvalException; |
| import net.starlark.java.eval.Starlark; |
| import net.starlark.java.eval.StarlarkInt; |
| |
| /** Information about the Java runtime used by the <code>java_*</code> rules. */ |
| @Immutable |
| public final class JavaRuntimeInfo extends StarlarkInfoWrapper { |
| |
| public static final StarlarkProviderWrapper<JavaRuntimeInfo> PROVIDER = new Provider(); |
| |
| // Helper methods to access an instance of JavaRuntimeInfo. |
| |
| public static JavaRuntimeInfo forHost(RuleContext ruleContext) throws RuleErrorException { |
| return JavaToolchainProvider.from(ruleContext).getJavaRuntime(); |
| } |
| |
| public static JavaRuntimeInfo from(RuleContext ruleContext, Label javaRuntimeToolchainType) { |
| ToolchainInfo toolchainInfo = ruleContext.getToolchainInfo(javaRuntimeToolchainType); |
| return from(ruleContext, toolchainInfo); |
| } |
| |
| @Nullable |
| public static JavaRuntimeInfo from(RuleContext ruleContext, String attributeName) { |
| if (!ruleContext.attributes().has(attributeName, LABEL)) { |
| return null; |
| } |
| TransitiveInfoCollection prerequisite = ruleContext.getPrerequisite(attributeName); |
| if (prerequisite == null) { |
| return null; |
| } |
| |
| ToolchainInfo toolchainInfo = prerequisite.get(ToolchainInfo.PROVIDER); |
| return from(ruleContext, toolchainInfo); |
| } |
| |
| @Nullable |
| private static JavaRuntimeInfo from(RuleContext ruleContext, ToolchainInfo toolchainInfo) { |
| if (toolchainInfo != null) { |
| try { |
| JavaRuntimeInfo result = PROVIDER.wrap(toolchainInfo.getValue("java_runtime", Info.class)); |
| if (result != null) { |
| return result; |
| } |
| } catch (EvalException | RuleErrorException e) { |
| ruleContext.ruleError(String.format("There was an error reading the Java runtime: %s", e)); |
| return null; |
| } |
| } |
| ruleContext.ruleError("The selected Java runtime is not a JavaRuntimeInfo"); |
| return null; |
| } |
| |
| private JavaRuntimeInfo(StarlarkInfo underlying) { |
| super(underlying); |
| } |
| |
| /** All input artifacts in the javabase. */ |
| public NestedSet<Artifact> javaBaseInputs() throws RuleErrorException { |
| return getUnderlyingNestedSet("files", Artifact.class); |
| } |
| |
| /** The root directory of the Java installation. */ |
| public String javaHome() throws RuleErrorException { |
| return getUnderlyingValue("java_home", String.class); |
| } |
| |
| public PathFragment javaBinaryExecPathFragment() throws RuleErrorException { |
| return PathFragment.create(getUnderlyingValue("java_executable_exec_path", String.class)); |
| } |
| |
| public PathFragment javaBinaryRunfilesPathFragment() throws RuleErrorException { |
| return PathFragment.create(getUnderlyingValue("java_executable_runfiles_path", String.class)); |
| } |
| |
| public ImmutableList<CcInfo> hermeticStaticLibs() throws RuleErrorException { |
| return getUnderlyingSequence("hermetic_static_libs", CcInfo.class).getImmutableList(); |
| } |
| |
| @VisibleForTesting |
| NestedSet<LibraryToLink> collectHermeticStaticLibrariesToLink() throws RuleErrorException { |
| NestedSetBuilder<LibraryToLink> result = NestedSetBuilder.stableOrder(); |
| for (CcInfo lib : hermeticStaticLibs()) { |
| result.addTransitive(lib.getCcLinkingContext().getLibraries()); |
| } |
| return result.build(); |
| } |
| |
| public int version() throws RuleErrorException { |
| return getUnderlyingValue("version", StarlarkInt.class).toIntUnchecked(); |
| } |
| |
| private static class Provider extends StarlarkProviderWrapper<JavaRuntimeInfo> { |
| |
| private Provider() { |
| super( |
| keyForBuiltins( |
| Label.parseCanonicalUnchecked("@_builtins//:common/java/java_runtime.bzl")), |
| "JavaRuntimeInfo"); |
| } |
| |
| @Override |
| public JavaRuntimeInfo wrap(Info value) throws RuleErrorException { |
| if (value instanceof StarlarkInfoWithSchema |
| && value.getProvider().getKey().equals(getKey())) { |
| return new JavaRuntimeInfo((StarlarkInfo) value); |
| } else { |
| throw new RuleErrorException( |
| "got value of type '" + Starlark.type(value) + "', want 'JavaRuntimeInfo'"); |
| } |
| } |
| } |
| } |