| // 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.base.Function; |
| import com.google.devtools.build.lib.analysis.Runfiles; |
| import com.google.devtools.build.lib.analysis.TransitiveInfoCollection; |
| import com.google.devtools.build.lib.analysis.TransitiveInfoProvider; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec; |
| |
| /** |
| * A {@link TransitiveInfoProvider} that supplies runfiles for Python dependencies. |
| * |
| * <p>Should only be used in proto_library, and even then only until a better mechanism is found. |
| */ |
| @Immutable |
| @AutoCodec |
| public final class PythonRunfilesProvider implements TransitiveInfoProvider { |
| private final Runfiles pythonRunfiles; |
| |
| public PythonRunfilesProvider(Runfiles pythonRunfiles) { |
| this.pythonRunfiles = pythonRunfiles; |
| } |
| |
| public Runfiles getPythonRunfiles() { |
| return pythonRunfiles; |
| } |
| |
| /** |
| * Returns a function that gets the Python runfiles from a {@link TransitiveInfoCollection} or the |
| * empty runfiles instance if it does not contain that provider. |
| */ |
| public static final Function<TransitiveInfoCollection, Runfiles> TO_RUNFILES = |
| input -> { |
| PythonRunfilesProvider provider = input.getProvider(PythonRunfilesProvider.class); |
| return provider == null ? Runfiles.EMPTY : provider.getPythonRunfiles(); |
| }; |
| } |