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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.skyframe;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.Interner;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.syntax.Environment.Extension;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.util.Objects;
/**
* A value that represents a Skylark import lookup result. The lookup value corresponds to exactly
* one Skylark file, identified by an absolute {@link Label} {@link SkyKey} argument. The Label
* should not reference the special {@code external} package.
*/
@AutoCodec
public class SkylarkImportLookupValue implements SkyValue {
private final Extension environmentExtension;
/**
* The immediate Skylark file dependency descriptor class corresponding to this value.
* Using this reference it's possible to reach the transitive closure of Skylark files
* on which this Skylark file depends.
*/
private final SkylarkFileDependency dependency;
@VisibleForTesting
public SkylarkImportLookupValue(
Extension environmentExtension, SkylarkFileDependency dependency) {
this.environmentExtension = Preconditions.checkNotNull(environmentExtension);
this.dependency = Preconditions.checkNotNull(dependency);
}
/**
* Returns the Extension
*/
public Extension getEnvironmentExtension() {
return environmentExtension;
}
/**
* Returns the immediate Skylark file dependency corresponding to this import lookup value.
*/
public SkylarkFileDependency getDependency() {
return dependency;
}
/**
* SkyKey for a Skylark import composed of the label of the Skylark extension and wether it is
* loaded from the WORKSPACE file or from a BUILD file.
*/
@Immutable
@AutoCodec.VisibleForSerialization
@AutoCodec
static final class SkylarkImportLookupKey implements SkyKey {
private static final Interner<SkylarkImportLookupKey> interner =
BlazeInterners.newWeakInterner();
public final Label importLabel;
public final boolean inWorkspace;
private SkylarkImportLookupKey(Label importLabel, boolean inWorkspace) {
Preconditions.checkNotNull(importLabel);
Preconditions.checkArgument(!importLabel.getPackageIdentifier().getRepository().isDefault());
this.importLabel = importLabel;
this.inWorkspace = inWorkspace;
}
@AutoCodec.VisibleForSerialization
@AutoCodec.Instantiator
static SkylarkImportLookupKey create(Label importLabel, boolean inWorkspace) {
return interner.intern(new SkylarkImportLookupKey(importLabel, inWorkspace));
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.SKYLARK_IMPORTS_LOOKUP;
}
@Override
public String toString() {
return importLabel + (inWorkspace ? " (in workspace)" : "");
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof SkylarkImportLookupKey)) {
return false;
}
SkylarkImportLookupKey other = (SkylarkImportLookupKey) obj;
return importLabel.equals(other.importLabel)
&& inWorkspace == other.inWorkspace;
}
@Override
public int hashCode() {
return Objects.hash(importLabel, inWorkspace);
}
}
static SkyKey key(Label importLabel, boolean inWorkspace) {
return SkylarkImportLookupKey.create(importLabel, inWorkspace);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof SkylarkImportLookupValue)) {
return false;
}
SkylarkImportLookupValue other = (SkylarkImportLookupValue) obj;
return environmentExtension.equals(other.getEnvironmentExtension())
&& dependency.equals(other.getDependency());
}
@Override
public int hashCode() {
return Objects.hash(environmentExtension, dependency);
}
}
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