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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.ImmutableMap;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.analysis.platform.ConstraintSettingInfo;
import com.google.devtools.build.lib.analysis.platform.ConstraintValueInfo;
import com.google.devtools.build.lib.analysis.platform.PlatformInfo;
import com.google.devtools.build.lib.analysis.platform.ToolchainInfo;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.packages.ClassObjectConstructor;
import com.google.devtools.build.lib.skylarkinterface.Param;
import com.google.devtools.build.lib.skylarkinterface.SkylarkCallable;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
import com.google.devtools.build.lib.skylarkinterface.SkylarkSignature;
import com.google.devtools.build.lib.syntax.BuiltinFunction;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.SkylarkDict;
import com.google.devtools.build.lib.syntax.SkylarkList;
import com.google.devtools.build.lib.syntax.SkylarkSignatureProcessor;
import com.google.devtools.build.lib.syntax.Type.ConversionException;
/** Skylark namespace used to interact with Blaze's platform APIs. */
@SkylarkModule(
name = "platform_common",
doc = "Functions for Skylark to interact with Blaze's platform APIs."
)
public class PlatformCommon {
@SkylarkCallable(
name = PlatformInfo.SKYLARK_NAME,
doc = "The key used to retrieve the provider containing platform_info's value.",
structField = true
)
public ClassObjectConstructor getPlatformInfoConstructor() {
return PlatformInfo.SKYLARK_CONSTRUCTOR;
}
@SkylarkCallable(
name = ConstraintSettingInfo.SKYLARK_NAME,
doc = "The key used to retrieve the provider containing constraint_setting_info's value.",
structField = true
)
public ClassObjectConstructor getConstraintSettingInfoConstructor() {
return ConstraintSettingInfo.SKYLARK_CONSTRUCTOR;
}
@SkylarkCallable(
name = ConstraintValueInfo.SKYLARK_NAME,
doc = "The key used to retrieve the provider containing constraint_value_info's value.",
structField = true
)
public ClassObjectConstructor getConstraintValueInfoConstructor() {
return ConstraintValueInfo.SKYLARK_CONSTRUCTOR;
}
@SkylarkCallable(
name = ToolchainInfo.SKYLARK_NAME,
doc = "The key used to retrieve the provider containing toolchain data.",
structField = true
)
public ClassObjectConstructor getToolchainInfoConstructor() {
return ToolchainInfo.SKYLARK_CONSTRUCTOR;
}
@SkylarkSignature(
name = "toolchain",
doc =
"<i>(Experimental)</i> "
+ "Returns a toolchain provider that can be configured to provide rule implementations "
+ "access to needed configuration.",
objectType = PlatformCommon.class,
returnType = ToolchainInfo.class,
parameters = {
@Param(name = "self", type = PlatformCommon.class, doc = "the platform_rules instance"),
@Param(
name = "exec_compatible_with",
type = SkylarkList.class,
generic1 = TransitiveInfoCollection.class,
defaultValue = "[]",
named = true,
positional = false,
doc = "Constraints the platform must fulfill to execute this toolchain."
),
@Param(
name = "target_compatible_with",
type = SkylarkList.class,
generic1 = TransitiveInfoCollection.class,
defaultValue = "[]",
named = true,
positional = false,
doc = "Constraints fulfilled by the target platform for this toolchain."
),
},
extraKeywords =
@Param(
name = "toolchainData",
doc = "Extra information stored for the consumer of the toolchain."
),
useLocation = true
)
private static final BuiltinFunction createToolchain =
new BuiltinFunction("toolchain") {
@SuppressWarnings("unchecked")
public ToolchainInfo invoke(
PlatformCommon self,
SkylarkList<TransitiveInfoCollection> execCompatibleWith,
SkylarkList<TransitiveInfoCollection> targetCompatibleWith,
SkylarkDict<String, Object> skylarkToolchainData,
Location loc)
throws ConversionException, EvalException {
Iterable<ConstraintValueInfo> execConstraints =
ConstraintValue.constraintValues(execCompatibleWith);
Iterable<ConstraintValueInfo> targetConstraints =
ConstraintValue.constraintValues(targetCompatibleWith);
ImmutableMap<String, Object> toolchainData =
ImmutableMap.copyOf(
SkylarkDict.castSkylarkDictOrNoneToDict(
skylarkToolchainData, String.class, Object.class, "toolchainData"));
return new ToolchainInfo(execConstraints, targetConstraints, toolchainData, loc);
}
};
static {
SkylarkSignatureProcessor.configureSkylarkFunctions(PlatformCommon.class);
}
}
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