| // Copyright 2015 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.packages; |
| |
| import com.google.common.base.Verify; |
| import com.google.common.collect.Maps; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.cmdline.LabelSyntaxException; |
| import com.google.devtools.build.lib.events.Location; |
| import com.google.devtools.build.lib.events.StoredEventHandler; |
| import com.google.devtools.build.lib.packages.RuleFactory.BuildLangTypedAttributeValuesMap; |
| import com.google.devtools.build.lib.syntax.FuncallExpression; |
| import com.google.devtools.build.lib.util.Preconditions; |
| |
| import java.util.Map; |
| |
| /** |
| * A builder that helps constructing the //external package. |
| */ |
| public class ExternalPackageBuilder { |
| |
| public Rule createAndAddRepositoryRule( |
| Package.Builder pkg, |
| RuleClass ruleClass, |
| RuleClass bindRuleClass, |
| Map<String, Object> kwargs, |
| FuncallExpression ast) |
| throws RuleFactory.InvalidRuleException, Package.NameConflictException, LabelSyntaxException, |
| InterruptedException { |
| |
| StoredEventHandler eventHandler = new StoredEventHandler(); |
| BuildLangTypedAttributeValuesMap attributeValues = new BuildLangTypedAttributeValuesMap(kwargs); |
| Rule rule = |
| RuleFactory.createRule( |
| pkg, ruleClass, attributeValues, eventHandler, ast, ast.getLocation(), /*env=*/ null); |
| pkg.addEvents(eventHandler.getEvents()); |
| overwriteRule(pkg, rule); |
| for (Map.Entry<String, Label> entry : |
| ruleClass.getExternalBindingsFunction().apply(rule).entrySet()) { |
| Label nameLabel = Label.parseAbsolute("//external:" + entry.getKey()); |
| addBindRule(pkg, bindRuleClass, nameLabel, entry.getValue(), rule.getLocation()); |
| } |
| return rule; |
| } |
| |
| public void addBindRule( |
| Package.Builder pkg, RuleClass bindRuleClass, Label virtual, Label actual, Location location) |
| throws RuleFactory.InvalidRuleException, Package.NameConflictException, InterruptedException { |
| |
| Map<String, Object> attributes = Maps.newHashMap(); |
| // Bound rules don't have a name field, but this works because we don't want more than one |
| // with the same virtual name. |
| attributes.put("name", virtual.getName()); |
| if (actual != null) { |
| attributes.put("actual", actual); |
| } |
| StoredEventHandler handler = new StoredEventHandler(); |
| BuildLangTypedAttributeValuesMap attributeValues = |
| new BuildLangTypedAttributeValuesMap(attributes); |
| Rule rule = |
| RuleFactory.createRule( |
| pkg, bindRuleClass, attributeValues, handler, /*ast=*/ null, location, /*env=*/ null); |
| overwriteRule(pkg, rule); |
| rule.setVisibility(ConstantRuleVisibility.PUBLIC); |
| } |
| |
| private void overwriteRule(Package.Builder pkg, Rule rule) throws Package.NameConflictException { |
| Preconditions.checkArgument(rule.getOutputFiles().isEmpty()); |
| Target old = pkg.targets.get(rule.getName()); |
| if (old != null) { |
| if (old instanceof Rule) { |
| Verify.verify(((Rule) old).getOutputFiles().isEmpty()); |
| } |
| |
| pkg.targets.remove(rule.getName()); |
| } |
| |
| pkg.addRule(rule); |
| } |
| } |