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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.rules.filegroup;
import com.google.devtools.build.lib.actions.Actions;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.CompilationHelper;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.MiddlemanProvider;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.Runfiles;
import com.google.devtools.build.lib.analysis.RunfilesProvider;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory;
import com.google.devtools.build.lib.rules.test.InstrumentedFilesCollector;
import com.google.devtools.build.lib.rules.test.InstrumentedFilesCollector.InstrumentationSpec;
import com.google.devtools.build.lib.rules.test.InstrumentedFilesProvider;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.util.FileTypeSet;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Iterator;
/**
* ConfiguredTarget for "filegroup".
*/
public class Filegroup implements RuleConfiguredTargetFactory {
@Override
public ConfiguredTarget create(RuleContext ruleContext) {
NestedSet<Artifact> filesToBuild = NestedSetBuilder.wrap(Order.STABLE_ORDER,
ruleContext.getPrerequisiteArtifacts("srcs", Mode.TARGET).list());
NestedSet<Artifact> middleman = CompilationHelper.getAggregatingMiddleman(
ruleContext, Actions.escapeLabel(ruleContext.getLabel()), filesToBuild);
InstrumentedFilesProvider instrumentedFilesProvider =
InstrumentedFilesCollector.collect(ruleContext,
// what do *we* know about whether this is a source file or not
new InstrumentationSpec(FileTypeSet.ANY_FILE, "srcs", "deps", "data"),
InstrumentedFilesCollector.NO_METADATA_COLLECTOR, filesToBuild);
RunfilesProvider runfilesProvider = RunfilesProvider.withData(
new Runfiles.Builder(
ruleContext.getWorkspaceName(),
ruleContext.getConfiguration().legacyExternalRunfiles())
.addRunfiles(ruleContext, RunfilesProvider.DEFAULT_RUNFILES)
.build(),
// If you're visiting a filegroup as data, then we also visit its data as data.
new Runfiles.Builder(
ruleContext.getWorkspaceName(),
ruleContext.getConfiguration().legacyExternalRunfiles())
.addTransitiveArtifacts(filesToBuild)
.addDataDeps(ruleContext).build());
return new RuleConfiguredTargetBuilder(ruleContext)
.add(RunfilesProvider.class, runfilesProvider)
.setFilesToBuild(filesToBuild)
.setRunfilesSupport(null, getExecutable(filesToBuild))
.add(InstrumentedFilesProvider.class, instrumentedFilesProvider)
.add(MiddlemanProvider.class, new MiddlemanProvider(middleman))
.add(FilegroupPathProvider.class,
new FilegroupPathProvider(getFilegroupPath(ruleContext)))
.build();
}
/**
* Returns the single Artifact from filesToBuild or {@code null} if there are multiple elements.
*/
private Artifact getExecutable(NestedSet<Artifact> filesToBuild) {
Iterator<Artifact> it = filesToBuild.iterator();
if (it.hasNext()) {
Artifact out = it.next();
if (!it.hasNext()) {
return out;
}
}
return null;
}
private PathFragment getFilegroupPath(RuleContext ruleContext) {
String attr = ruleContext.attributes().get("path", Type.STRING);
if (attr.isEmpty()) {
return PathFragment.EMPTY_FRAGMENT;
} else {
return ruleContext.getLabel().getPackageIdentifier().getPathFragment().getRelative(attr);
}
}
}
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