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// Copyright 2015 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.skyframe;
import com.google.common.base.Predicate;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.skyframe.CycleInfo;
import com.google.devtools.build.skyframe.SkyKey;
/**
* Reports cycles between {@link ConfiguredTargetValue}s. Similar to
* {@link TransitiveTargetCycleReporter}, these indicate cycles between targets, but during the
* analysis phase. In the current target-parsing, loading, analysis, and execution phase
* distinction, such cycles can only occur due to the presence of a specific configuration (if
* such a cycle occurs regardless of the configuration, then it would have been caught during the
* target parsing or loading phase).
*/
class ConfiguredTargetCycleReporter extends AbstractLabelCycleReporter {
private static final Predicate<SkyKey> IS_CONFIGURED_TARGET_SKY_KEY =
SkyFunctions.isSkyFunction(SkyFunctions.CONFIGURED_TARGET);
ConfiguredTargetCycleReporter(SkyframePackageManager loadedPackageProvider) {
super(loadedPackageProvider);
}
@Override
protected boolean canReportCycle(SkyKey topLevelKey, CycleInfo cycleInfo) {
return Iterables.all(Iterables.concat(ImmutableList.of(topLevelKey),
cycleInfo.getPathToCycle(), cycleInfo.getCycle()), IS_CONFIGURED_TARGET_SKY_KEY);
}
@Override
protected String getAdditionalMessageAboutCycle(SkyKey topLevelKey, CycleInfo cycleInfo) {
return "\nThis cycle occurred because of a configuration option";
}
@Override
public String prettyPrint(SkyKey key) {
return ((ConfiguredTargetKey) key.argument()).prettyPrint();
}
@Override
public Label getLabel(SkyKey key) {
return ((ConfiguredTargetKey) key.argument()).getLabel();
}
}
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