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// Copyright 2018 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.devtools.build.lib.actions.MutableActionGraph.ActionConflictException;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.platform.PlatformInfo;
import com.google.devtools.build.lib.analysis.platform.PlatformProviderUtils;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.packages.NoSuchThingException;
import com.google.devtools.build.lib.skyframe.ConfiguredTargetFunction.ConfiguredValueCreationException;
import com.google.devtools.build.skyframe.SkyFunction.Environment;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.ValueOrException3;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.Nullable;
/** Helper class that looks up {@link PlatformInfo} data. */
public class PlatformLookupUtil {
@Nullable
public static Map<ConfiguredTargetKey, PlatformInfo> getPlatformInfo(
Iterable<ConfiguredTargetKey> platformKeys, Environment env)
throws InterruptedException, InvalidPlatformException {
Map<
SkyKey,
ValueOrException3<
ConfiguredValueCreationException, NoSuchThingException, ActionConflictException>>
values =
env.getValuesOrThrow(
platformKeys,
ConfiguredValueCreationException.class,
NoSuchThingException.class,
ActionConflictException.class);
boolean valuesMissing = env.valuesMissing();
Map<ConfiguredTargetKey, PlatformInfo> platforms = valuesMissing ? null : new HashMap<>();
for (ConfiguredTargetKey key : platformKeys) {
PlatformInfo platformInfo = findPlatformInfo(key, values.get(key));
if (!valuesMissing && platformInfo != null) {
platforms.put(key, platformInfo);
}
}
if (valuesMissing) {
return null;
}
return platforms;
}
/**
* Returns the {@link PlatformInfo} provider from the {@link ConfiguredTarget} in the {@link
* ValueOrException3}, or {@code null} if the {@link ConfiguredTarget} is not present. If the
* {@link ConfiguredTarget} does not have a {@link PlatformInfo} provider, a {@link
* InvalidPlatformException} is thrown.
*/
@Nullable
private static PlatformInfo findPlatformInfo(
ConfiguredTargetKey key,
ValueOrException3<
ConfiguredValueCreationException, NoSuchThingException, ActionConflictException>
valueOrException)
throws InvalidPlatformException {
try {
ConfiguredTargetValue ctv = (ConfiguredTargetValue) valueOrException.get();
if (ctv == null) {
return null;
}
ConfiguredTarget configuredTarget = ctv.getConfiguredTarget();
PlatformInfo platformInfo = PlatformProviderUtils.platform(configuredTarget);
if (platformInfo == null) {
throw new InvalidPlatformException(configuredTarget.getLabel());
}
return platformInfo;
} catch (ConfiguredValueCreationException e) {
throw new InvalidPlatformException(key.getLabel(), e);
} catch (NoSuchThingException e) {
throw new InvalidPlatformException(key.getLabel(), e);
} catch (ActionConflictException e) {
throw new InvalidPlatformException(key.getLabel(), e);
}
}
/** Exception used when a platform label is not a valid platform. */
public static final class InvalidPlatformException extends ToolchainException {
InvalidPlatformException(Label label) {
super(formatError(label));
}
InvalidPlatformException(Label label, ConfiguredValueCreationException e) {
super(formatError(label), e);
}
public InvalidPlatformException(Label label, NoSuchThingException e) {
// Just propagate the inner exception, because it's directly actionable.
super(e);
}
public InvalidPlatformException(Label label, ActionConflictException e) {
super(formatError(label), e);
}
private static String formatError(Label label) {
return String.format(
"Target %s was referenced as a platform, but does not provide PlatformInfo", label);
}
}
}
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