| // Copyright 2016 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.devtools.build.lib.packages.DependencyFilter.AttributeInfoProvider; |
| import com.google.devtools.build.lib.syntax.Type.LabelClass; |
| import com.google.devtools.build.lib.util.BinaryPredicate; |
| |
| /** |
| * A predicate that returns true if an dependency attribute should be included in the result of |
| * <code>blaze query</code>. |
| * Used to implement <code>--[no]implicit_deps</code>, <code>--[no]host_deps</code> etc. |
| */ |
| public abstract class DependencyFilter |
| implements BinaryPredicate<AttributeInfoProvider, Attribute> { |
| |
| /** Dependency predicate that includes all dependencies */ |
| public static final DependencyFilter ALL_DEPS = |
| new DependencyFilter() { |
| @Override |
| public boolean apply(AttributeInfoProvider x, Attribute y) { |
| return true; |
| } |
| }; |
| /** Dependency predicate that excludes host dependencies */ |
| public static final DependencyFilter NO_HOST_DEPS = |
| new DependencyFilter() { |
| @Override |
| public boolean apply(AttributeInfoProvider infoProvider, Attribute attribute) { |
| // getConfigurationTransition() is only defined for labels which introduce a dependency. |
| if (attribute.getType().getLabelClass() != LabelClass.DEPENDENCY) { |
| return true; |
| } |
| |
| return !attribute.getTransitionFactory().isHost(); |
| } |
| }; |
| /** Dependency predicate that excludes implicit dependencies */ |
| public static final DependencyFilter NO_IMPLICIT_DEPS = |
| new DependencyFilter() { |
| @Override |
| public boolean apply(AttributeInfoProvider infoProvider, Attribute attribute) { |
| return infoProvider.isAttributeValueExplicitlySpecified(attribute); |
| } |
| }; |
| /** |
| * Dependency predicate that excludes those edges that are not present in |
| * the loading phase target dependency graph. |
| */ |
| public static final DependencyFilter NO_NODEP_ATTRIBUTES = |
| new DependencyFilter() { |
| @Override |
| public boolean apply(AttributeInfoProvider infoProvider, Attribute attribute) { |
| return attribute.getType().getLabelClass() != LabelClass.NONDEP_REFERENCE; |
| } |
| }; |
| /** |
| * Checks to see if the attribute has the isDirectCompileTimeInput property. |
| */ |
| public static final DependencyFilter DIRECT_COMPILE_TIME_INPUT = |
| new DependencyFilter() { |
| @Override |
| public boolean apply(AttributeInfoProvider infoProvider, Attribute attribute) { |
| return attribute.isDirectCompileTimeInput(); |
| } |
| }; |
| |
| /** |
| * Returns true if a given attribute should be processed. |
| */ |
| @Override |
| public abstract boolean apply(AttributeInfoProvider infoProvider, Attribute attribute); |
| |
| /** |
| * Returns a predicate that computes the logical and of the two given predicates. |
| */ |
| public static DependencyFilter and( |
| final DependencyFilter a, final DependencyFilter b) { |
| return new DependencyFilter() { |
| @Override |
| public boolean apply(AttributeInfoProvider infoProvider, Attribute attribute) { |
| return a.apply(infoProvider, attribute) && b.apply(infoProvider, attribute); |
| } |
| }; |
| } |
| |
| /** |
| * Interface to provide information about attributes to dependency filters. |
| */ |
| public interface AttributeInfoProvider { |
| /** |
| * Returns true iff the value of the specified attribute is explicitly set in |
| * the BUILD file (as opposed to its default value). This also returns true if |
| * the value from the BUILD file is the same as the default value. |
| */ |
| boolean isAttributeValueExplicitlySpecified(Attribute attribute); |
| } |
| } |