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// 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.analysis;
import com.google.common.base.Function;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
/**
* Runfiles a target contributes to targets that depend on it.
*
* <p>The set of runfiles contributed can be different if the dependency is through a
* <code>data</code> attribute (note that this is just a rough approximation of the reality --
* rule implementations are free to request the data runfiles at any time)
*/
@Immutable
public final class RunfilesProvider implements TransitiveInfoProvider {
private final Runfiles defaultRunfiles;
private final Runfiles dataRunfiles;
private RunfilesProvider(Runfiles defaultRunfiles, Runfiles dataRunfiles) {
this.defaultRunfiles = defaultRunfiles;
this.dataRunfiles = dataRunfiles;
}
public Runfiles getDefaultRunfiles() {
return defaultRunfiles;
}
public Runfiles getDataRunfiles() {
return dataRunfiles;
}
/**
* Returns a function that gets the default runfiles from a {@link TransitiveInfoCollection} or
* the empty runfiles instance if it does not contain that provider.
*/
public static final Function<TransitiveInfoCollection, Runfiles> DEFAULT_RUNFILES =
new Function<TransitiveInfoCollection, Runfiles>() {
@Override
public Runfiles apply(TransitiveInfoCollection input) {
RunfilesProvider provider = input.getProvider(RunfilesProvider.class);
if (provider != null) {
return provider.getDefaultRunfiles();
}
return Runfiles.EMPTY;
}
};
/**
* Returns a function that gets the data runfiles from a {@link TransitiveInfoCollection} or the
* empty runfiles instance if it does not contain that provider.
*
* <p>These are usually used if the target is depended on through a {@code data} attribute.
*/
public static final Function<TransitiveInfoCollection, Runfiles> DATA_RUNFILES =
new Function<TransitiveInfoCollection, Runfiles>() {
@Override
public Runfiles apply(TransitiveInfoCollection input) {
RunfilesProvider provider = input.getProvider(RunfilesProvider.class);
if (provider != null) {
return provider.getDataRunfiles();
}
return Runfiles.EMPTY;
}
};
public static RunfilesProvider simple(Runfiles defaultRunfiles) {
return new RunfilesProvider(defaultRunfiles, defaultRunfiles);
}
public static RunfilesProvider withData(
Runfiles defaultRunfiles, Runfiles dataRunfiles) {
return new RunfilesProvider(defaultRunfiles, dataRunfiles);
}
public static final RunfilesProvider EMPTY = new RunfilesProvider(
Runfiles.EMPTY, Runfiles.EMPTY);
}
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