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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.collect.Interner;
import com.google.devtools.build.lib.cmdline.TargetParsingException;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.skyframe.AbstractSkyKey;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import javax.annotation.Nullable;
/**
* SkyFunction that throws a {@link TargetParsingException} for target pattern that could not be
* parsed. Must only be requested when a SkyFunction wishes to ignore the errors
* in a target pattern in keep_going mode, but to shut down the build in nokeep_going mode.
*
* <p>This SkyFunction never returns a value, only throws a {@link TargetParsingException}, and
* should never return null, since all of its dependencies should already be present.
*/
public class TargetPatternErrorFunction implements SkyFunction {
// We pass in the error message, which isn't ideal. We could consider reparsing the original
// pattern instead, but that requires more information.
public static Key key(String errorMessage) {
return Key.create(errorMessage);
}
@AutoCodec.VisibleForSerialization
@AutoCodec
static class Key extends AbstractSkyKey<String> {
private static final Interner<Key> interner = BlazeInterners.newWeakInterner();
private Key(String arg) {
super(arg);
}
@AutoCodec.VisibleForSerialization
@AutoCodec.Instantiator
static Key create(String arg) {
return interner.intern(new Key(arg));
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.TARGET_PATTERN_ERROR;
}
}
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws TargetErrorFunctionException, InterruptedException {
String errorMessage = (String) skyKey.argument();
throw new TargetErrorFunctionException(
new TargetParsingException(errorMessage), Transience.PERSISTENT);
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
private static class TargetErrorFunctionException extends SkyFunctionException {
public TargetErrorFunctionException(
TargetParsingException cause, Transience transience) {
super(cause, transience);
}
}
}
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