| // 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 static com.google.devtools.build.lib.packages.Attribute.attr; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.analysis.RuleDefinition; |
| import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment; |
| import com.google.devtools.build.lib.analysis.platform.ConstraintSettingInfo; |
| import com.google.devtools.build.lib.packages.BuildType; |
| import com.google.devtools.build.lib.packages.RuleClass; |
| import com.google.devtools.build.lib.util.FileTypeSet; |
| |
| /** Rule definition for {@link ConstraintValue}. */ |
| public class ConstraintValueRule implements RuleDefinition { |
| public static final String RULE_NAME = "constraint_value"; |
| public static final String CONSTRAINT_SETTING_ATTR = "constraint_setting"; |
| |
| @Override |
| public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment env) { |
| return builder |
| /* <!-- #BLAZE_RULE(constraint_value).ATTRIBUTE(constraint_setting) --> |
| The constraint_setting rule this value is applied to. |
| <!-- #END_BLAZE_RULE.ATTRIBUTE --> */ |
| .add( |
| attr(CONSTRAINT_SETTING_ATTR, BuildType.LABEL) |
| .mandatory() |
| .allowedRuleClasses(ConstraintSettingRule.RULE_NAME) |
| .allowedFileTypes(FileTypeSet.NO_FILE) |
| .mandatoryProviders( |
| ImmutableList.of(ConstraintSettingInfo.PROVIDER.id()))) |
| .build(); |
| } |
| |
| @Override |
| public Metadata getMetadata() { |
| return Metadata.builder() |
| .name(RULE_NAME) |
| .ancestors(PlatformBaseRule.class) |
| .factoryClass(ConstraintValue.class) |
| .build(); |
| } |
| } |
| /*<!-- #BLAZE_RULE (NAME = constraint_value, TYPE = OTHER, FAMILY = Platform)[GENERIC_RULE] --> |
| |
| <p>This rule defines a specific value of a constraint, which can be used to define execution |
| platforms. |
| |
| <!-- #END_BLAZE_RULE -->*/ |