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// 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.analysis;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.packages.BuiltinProvider;
import com.google.devtools.build.lib.packages.NativeInfo;
import com.google.devtools.build.lib.skylarkbuildapi.DefaultInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.FilesToRunProviderApi;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.Runtime;
import com.google.devtools.build.lib.syntax.SkylarkNestedSet;
import javax.annotation.Nullable;
/** DefaultInfo is provided by all targets implicitly and contains all standard fields. */
@Immutable
public final class DefaultInfo extends NativeInfo implements DefaultInfoApi {
private final SkylarkNestedSet files;
private final Runfiles runfiles;
private final Runfiles dataRunfiles;
private final Runfiles defaultRunfiles;
private final Artifact executable;
private final FilesToRunProvider filesToRunProvider;
/**
* Singleton instance of the provider type for {@link DefaultInfo}.
*/
public static final DefaultInfoProvider PROVIDER = new DefaultInfoProvider();
private DefaultInfo(
@Nullable RunfilesProvider runfilesProvider,
FileProvider fileProvider,
FilesToRunProvider filesToRunProvider) {
this(
Location.BUILTIN,
SkylarkNestedSet.of(Artifact.class, fileProvider.getFilesToBuild()),
Runfiles.EMPTY,
(runfilesProvider == null) ? Runfiles.EMPTY : runfilesProvider.getDataRunfiles(),
(runfilesProvider == null) ? Runfiles.EMPTY : runfilesProvider.getDefaultRunfiles(),
filesToRunProvider.getExecutable(),
filesToRunProvider
);
}
private DefaultInfo(
Location loc,
SkylarkNestedSet files, Runfiles runfiles,
Runfiles dataRunfiles, Runfiles defaultRunfiles, Artifact executable,
@Nullable FilesToRunProvider filesToRunProvider) {
super(PROVIDER, loc);
this.files = files;
this.runfiles = runfiles;
this.dataRunfiles = dataRunfiles;
this.defaultRunfiles = defaultRunfiles;
this.executable = executable;
this.filesToRunProvider = filesToRunProvider;
}
public static DefaultInfo build(
@Nullable RunfilesProvider runfilesProvider,
FileProvider fileProvider,
FilesToRunProvider filesToRunProvider) {
return new DefaultInfo(runfilesProvider, fileProvider, filesToRunProvider);
}
@Override
public SkylarkNestedSet getFiles() {
return files;
}
@Override
public FilesToRunProviderApi getFilesToRun() {
return filesToRunProvider;
}
/**
* Returns a set of runfiles acting as both the data runfiles and the default runfiles.
*
* This is kept for legacy reasons.
*/
public Runfiles getStatelessRunfiles() {
return runfiles;
}
@Override
public Runfiles getDataRunfiles() {
return dataRunfiles;
}
@Override
public Runfiles getDefaultRunfiles() {
if (dataRunfiles == null && defaultRunfiles == null) {
// This supports the legacy skylark runfiles constructor -- if the 'runfiles' attribute
// is used, then default_runfiles will return all runfiles.
return runfiles;
} else {
return defaultRunfiles;
}
}
/**
* If the rule producing this info object is marked 'executable' or 'test', this is an artifact
* representing the file that should be executed to run the target. This is null otherwise.
*/
public Artifact getExecutable() {
return executable;
}
/**
* Provider implementation for {@link DefaultInfoApi}.
*/
public static class DefaultInfoProvider extends BuiltinProvider<DefaultInfo>
implements DefaultInfoApi.DefaultInfoApiProvider<Runfiles, Artifact> {
private DefaultInfoProvider() {
super("DefaultInfo", DefaultInfo.class);
}
@Override
public DefaultInfo constructor(Object files, Object runfilesObj,
Object dataRunfilesObj, Object defaultRunfilesObj, Object executable, Location loc)
throws EvalException {
Runfiles statelessRunfiles = castNoneToNull(Runfiles.class, runfilesObj);
Runfiles dataRunfiles = castNoneToNull(Runfiles.class, dataRunfilesObj);
Runfiles defaultRunfiles = castNoneToNull(Runfiles.class, defaultRunfilesObj);
if ((statelessRunfiles != null) && (dataRunfiles != null || defaultRunfiles != null)) {
throw new EvalException(loc, "Cannot specify the provider 'runfiles' "
+ "together with 'data_runfiles' or 'default_runfiles'");
}
return new DefaultInfo(
loc,
castNoneToNull(SkylarkNestedSet.class, files),
statelessRunfiles,
dataRunfiles,
defaultRunfiles,
castNoneToNull(Artifact.class, executable), null);
}
}
private static <T> T castNoneToNull(Class<T> clazz, Object value) {
if (value == Runtime.NONE) {
return null;
} else {
return clazz.cast(value);
}
}
}
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