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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.rules.cpp;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.AnalysisUtils;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.packages.NativeInfo;
import com.google.devtools.build.lib.packages.NativeProvider;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.VisibleForSerialization;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.CcCompilationInfoApi;
import com.google.devtools.build.lib.syntax.Environment;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.FunctionSignature;
import com.google.devtools.build.lib.syntax.Runtime;
import com.google.devtools.build.lib.syntax.SkylarkNestedSet;
import com.google.devtools.build.lib.syntax.SkylarkType;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Collection;
import javax.annotation.Nullable;
/** Wrapper for every C++ compilation provider. */
@Immutable
@AutoCodec
public final class CcCompilationInfo extends NativeInfo implements CcCompilationInfoApi {
private static final FunctionSignature.WithValues<Object, SkylarkType> SIGNATURE =
FunctionSignature.WithValues.create(
FunctionSignature.of(
/* numMandatoryPositionals= */ 0,
/* numOptionalPositionals= */ 0,
/* numMandatoryNamedOnly= */ 0,
/* starArg= */ false,
/* kwArg= */ false,
"headers",
"system_includes",
"defines"),
/* defaultValues= */ ImmutableList.of(Runtime.NONE, Runtime.NONE, Runtime.NONE),
/* types= */ ImmutableList.of(
SkylarkType.of(SkylarkNestedSet.class),
SkylarkType.of(SkylarkNestedSet.class),
SkylarkType.of(SkylarkNestedSet.class)));
@Nullable
private static Object nullIfNone(Object object) {
return nullIfNone(object, Object.class);
}
@Nullable
private static <T> T nullIfNone(Object object, Class<T> type) {
return object != Runtime.NONE ? type.cast(object) : null;
}
public static final NativeProvider<CcCompilationInfo> PROVIDER =
new NativeProvider<CcCompilationInfo>(
CcCompilationInfo.class, "CcCompilationInfo", SIGNATURE) {
@Override
@SuppressWarnings("unchecked")
protected CcCompilationInfo createInstanceFromSkylark(
Object[] args, Environment env, Location loc) throws EvalException {
CcCommon.checkLocationWhitelisted(loc);
CcCompilationInfo.Builder ccCompilationInfoBuilder = CcCompilationInfo.Builder.create();
CcCompilationContext.Builder ccCompilationContext =
new CcCompilationContext.Builder(/* ruleContext= */ null);
int i = 0;
SkylarkNestedSet headers = (SkylarkNestedSet) nullIfNone(args[i++]);
if (headers != null) {
ccCompilationContext.addDeclaredIncludeSrcs(headers.getSet(Artifact.class));
}
SkylarkNestedSet systemIncludes = (SkylarkNestedSet) nullIfNone(args[i++]);
if (systemIncludes != null) {
ccCompilationContext.addSystemIncludeDirs(
systemIncludes
.getSet(String.class)
.toList()
.stream()
.map(x -> PathFragment.create(x))
.collect(ImmutableList.toImmutableList()));
}
SkylarkNestedSet defines = (SkylarkNestedSet) nullIfNone(args[i++]);
if (defines != null) {
ccCompilationContext.addDefines(defines.getSet(String.class));
}
ccCompilationInfoBuilder.setCcCompilationContext(ccCompilationContext.build());
return ccCompilationInfoBuilder.build();
}
};
private final CcCompilationContext ccCompilationContext;
@AutoCodec.Instantiator
@VisibleForSerialization
CcCompilationInfo(CcCompilationContext ccCompilationContext) {
super(PROVIDER);
this.ccCompilationContext = ccCompilationContext;
}
public static CcCompilationInfo merge(Collection<CcCompilationInfo> ccCompilationInfos) {
CcCompilationContext.Builder builder =
new CcCompilationContext.Builder(/* ruleContext= */ null);
builder.mergeDependentCcCompilationContexts(
ccCompilationInfos
.stream()
.map(CcCompilationInfo::getCcCompilationContext)
.collect(ImmutableList.toImmutableList()));
return (new CcCompilationInfo.Builder()).setCcCompilationContext(builder.build()).build();
}
@Override
public SkylarkNestedSet getSkylarkDefines() {
return SkylarkNestedSet.of(
String.class, NestedSetBuilder.wrap(Order.STABLE_ORDER, ccCompilationContext.getDefines()));
}
@Override
public SkylarkNestedSet getSkylarkHeaders() {
return SkylarkNestedSet.of(Artifact.class, ccCompilationContext.getDeclaredIncludeSrcs());
}
@Override
public SkylarkNestedSet getSkylarkDeclaredIncludeDirs() {
return SkylarkNestedSet.of(
String.class,
NestedSetBuilder.wrap(
Order.STABLE_ORDER,
ccCompilationContext
.getSystemIncludeDirs()
.stream()
.map(PathFragment::getPathString)
.collect(ImmutableList.toImmutableList())));
}
public CcCompilationContext getCcCompilationContext() {
return ccCompilationContext;
}
/** A Builder for {@link CcCompilationInfo}. */
public static class Builder {
CcCompilationContext ccCompilationContext;
public static CcCompilationInfo.Builder create() {
return new CcCompilationInfo.Builder();
}
public <P extends TransitiveInfoProvider> Builder setCcCompilationContext(
CcCompilationContext ccCompilationContext) {
Preconditions.checkState(this.ccCompilationContext == null);
this.ccCompilationContext = ccCompilationContext;
return this;
}
public CcCompilationInfo build() {
return new CcCompilationInfo(ccCompilationContext);
}
}
public static ImmutableList<CcCompilationContext> getCcCompilationContexts(
Iterable<? extends TransitiveInfoCollection> deps) {
ImmutableList.Builder<CcCompilationContext> ccCompilationContextsBuilder =
ImmutableList.builder();
for (CcCompilationInfo ccCompilationInfo :
AnalysisUtils.getProviders(deps, CcCompilationInfo.PROVIDER)) {
CcCompilationContext ccCompilationContext = ccCompilationInfo.getCcCompilationContext();
if (ccCompilationContext != null) {
ccCompilationContextsBuilder.add(ccCompilationContext);
}
}
return ccCompilationContextsBuilder.build();
}
@Override
public boolean equals(Object otherObject) {
if (!(otherObject instanceof CcCompilationInfo)) {
return false;
}
CcCompilationInfo other = (CcCompilationInfo) otherObject;
if (this == other) {
return true;
}
if (!this.ccCompilationContext.equals(other.ccCompilationContext)) {
return false;
}
return true;
}
@Override
public int hashCode() {
return Objects.hashCode(ccCompilationContext);
}
}
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