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// Copyright 2017 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.platform;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.analysis.platform.ConstraintValueInfo;
import com.google.devtools.build.lib.analysis.platform.PlatformProviderUtils;
import com.google.devtools.build.lib.analysis.platform.ToolchainInfo;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.packages.SkylarkClassObjectConstructor;
import com.google.devtools.build.lib.packages.ToolchainConstructor;
import com.google.devtools.build.lib.syntax.Environment;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.FuncallExpression;
import com.google.devtools.build.lib.syntax.FunctionSignature;
import com.google.devtools.build.lib.syntax.SkylarkDict;
import com.google.devtools.build.lib.syntax.SkylarkList;
import com.google.devtools.build.lib.syntax.SkylarkType;
import javax.annotation.Nullable;
/** Skylark value that can be used to create toolchains. */
public class SkylarkToolchainConstructor extends SkylarkClassObjectConstructor
implements ToolchainConstructor {
private static final String EXEC_COMPATIBLE_WITH = "exec_compatible_with";
private static final String TARGET_COMPATIBLE_WITH = "target_compatible_with";
private static final String TOOLCHAIN_DATA = "toolchain_data";
private static final FunctionSignature.WithValues<Object, SkylarkType> SIGNATURE =
FunctionSignature.WithValues.create(
FunctionSignature.of(
/*numMandatoryPositionals=*/ 0,
/*numOptionalPositionals=*/ 0,
/*numMandatoryNamedOnly*/ 0,
/*starArg=*/ false,
/*kwArg=*/ true,
/*names=*/ EXEC_COMPATIBLE_WITH,
TARGET_COMPATIBLE_WITH,
TOOLCHAIN_DATA),
/*defaultValues=*/ ImmutableList.<Object>of(
SkylarkList.MutableList.EMPTY, SkylarkList.MutableList.EMPTY),
/*types=*/ ImmutableList.<SkylarkType>of(
SkylarkType.Combination.of(
SkylarkType.LIST, SkylarkType.Simple.of(TransitiveInfoCollection.class)),
SkylarkType.Combination.of(
SkylarkType.LIST, SkylarkType.Simple.of(TransitiveInfoCollection.class)),
SkylarkType.DICT));
public SkylarkToolchainConstructor(Location location) {
super(
"<no name>", // name is set on export.
SIGNATURE,
location);
}
@Override
@Nullable
protected Object call(Object[] args, @Nullable FuncallExpression ast, @Nullable Environment env)
throws EvalException, InterruptedException {
// Based on SIGNATURE above, the args are exec (list), target (list), data (map).
Iterable<ConstraintValueInfo> execConstraints =
PlatformProviderUtils.constraintValues((SkylarkList<TransitiveInfoCollection>) args[0]);
Iterable<ConstraintValueInfo> targetConstraints =
PlatformProviderUtils.constraintValues((SkylarkList<TransitiveInfoCollection>) args[1]);
SkylarkDict<String, Object> toolchainData = (SkylarkDict<String, Object>) args[2];
Location loc = ast != null ? ast.getLocation() : Location.BUILTIN;
return new ToolchainInfo(getKey(), execConstraints, targetConstraints, toolchainData, loc);
}
}
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