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// Copyright 2022 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.starlark;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import com.google.devtools.build.lib.packages.Type;
import com.google.devtools.build.lib.skyframe.SkyFunctions;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import com.google.errorprone.annotations.CheckReturnValue;
import java.util.Map;
import java.util.Set;
/**
* This contains information about a list of given Starlark build options, specifically their
* defaults and the (final) actual values of alias {@link Label}.
*
* <p>For memory-efficiency reasons, aliasToActual contains only aliases in keys. Other attributes
* contain only actual build setting as keys.
*
* <p>Potentially aliased targets can be unaliased with aliasToActual().getWithDefault(raw, raw);
*/
@CheckReturnValue
@Immutable
@ThreadSafe
@AutoValue
public abstract class StarlarkBuildSettingsDetailsValue implements SkyValue {
/**
* Create a single StarlarkBuildSettingsDetailsValue that can be quickly returned for transitions
* that use no Starlark build settings
*/
public static final StarlarkBuildSettingsDetailsValue EMPTY =
create(ImmutableMap.of(), ImmutableMap.of(), ImmutableSet.of(), ImmutableMap.of());
/** Map from each build option to its default value. Does not include aliases. */
public abstract ImmutableMap<Label, Object> buildSettingToDefault();
/** Map from each build option to its type information. Does not include aliases. */
public abstract ImmutableMap<Label, Type<?>> buildSettingToType();
/** If build option is in this set, is an allows_multiple option. Does not include aliases. */
public abstract ImmutableSet<Label> buildSettingIsAllowsMultiple();
/** Map from an alias Label to actual Label it points to. */
public abstract ImmutableMap<Label, Label> aliasToActual();
public static StarlarkBuildSettingsDetailsValue create(
Map<Label, Object> buildSettingDefaults,
Map<Label, Type<?>> buildSettingToType,
Set<Label> buildSettingIsAllowsMultiple,
Map<Label, Label> aliasToActual) {
return new AutoValue_StarlarkBuildSettingsDetailsValue(
ImmutableMap.copyOf(buildSettingDefaults),
ImmutableMap.copyOf(buildSettingToType),
ImmutableSet.copyOf(buildSettingIsAllowsMultiple),
ImmutableMap.copyOf(aliasToActual));
}
public static Key key(Set<Label> buildSettings) {
return Key.create(ImmutableSet.copyOf(buildSettings));
}
/** {@link SkyKey} implementation used for {@link StarlarkBuildSettingsDetailsValue}. */
@CheckReturnValue
@Immutable
@ThreadSafe
@AutoValue
public abstract static class Key implements SkyKey {
public abstract ImmutableSet<Label> buildSettings();
@Override
public SkyFunctionName functionName() {
return SkyFunctions.STARLARK_BUILD_SETTINGS_DETAILS;
}
static Key create(ImmutableSet<Label> buildSettings) {
return new AutoValue_StarlarkBuildSettingsDetailsValue_Key(buildSettings);
}
}
}