| // Copyright 2014 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.python; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; |
| import com.google.devtools.build.lib.cmdline.Label; |
| 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.StarlarkProviderWrapper; |
| import com.google.devtools.build.lib.rules.cpp.CcInfo; |
| import net.starlark.java.eval.EvalException; |
| |
| /** A target that provides C++ libraries to be linked into Python targets. */ |
| @VisibleForTesting |
| @Immutable |
| public final class PyCcLinkParamsProvider { |
| private static final BuiltinProvider BUILTIN_PROVIDER = new BuiltinProvider(); |
| private static final RulesPythonProvider RULES_PYTHON_PROVIDER = new RulesPythonProvider(); |
| |
| private final CcInfo ccInfo; |
| |
| public PyCcLinkParamsProvider(StarlarkInfo info) throws EvalException { |
| this.ccInfo = info.getValue("cc_info", CcInfo.class); |
| } |
| |
| public static PyCcLinkParamsProvider fromTarget(ConfiguredTarget target) |
| throws RuleErrorException { |
| PyCcLinkParamsProvider provider = target.get(RULES_PYTHON_PROVIDER); |
| if (provider != null) { |
| return provider; |
| } |
| provider = target.get(BUILTIN_PROVIDER); |
| if (provider != null) { |
| return provider; |
| } |
| throw new IllegalStateException( |
| String.format("Unable to find PyCcLinkParamsProvider provider in %s", target)); |
| } |
| |
| public CcInfo getCcInfo() { |
| return ccInfo; |
| } |
| |
| private static class BaseProvider extends StarlarkProviderWrapper<PyCcLinkParamsProvider> { |
| private BaseProvider(String bzlLabel) { |
| super(Label.parseCanonicalUnchecked(bzlLabel), "PyCcLinkParamsProvider"); |
| } |
| |
| @Override |
| public PyCcLinkParamsProvider wrap(Info value) throws RuleErrorException { |
| try { |
| return new PyCcLinkParamsProvider((StarlarkInfo) value); |
| } catch (EvalException e) { |
| throw new RuleErrorException(e.getMessageWithStack()); |
| } |
| } |
| } |
| |
| /** Provider class for builtin PyWrapCcLinkParamsProvider. */ |
| public static class BuiltinProvider extends BaseProvider { |
| private BuiltinProvider() { |
| super("@_builtins//:common/python/providers.bzl"); |
| } |
| } |
| |
| /** Provider class for rules_python PyWrapCcLinkParamsProvider. */ |
| public static class RulesPythonProvider extends BaseProvider { |
| private RulesPythonProvider() { |
| super("//third_party/bazel_rules/rules_python/python/private/common:providers.bzl"); |
| } |
| } |
| } |