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// 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.generatedprojecttest.util;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import com.google.devtools.build.lib.packages.Attribute;
import com.google.devtools.build.lib.packages.BuildType;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleClass.Builder.RuleClassType;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.util.Pair;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* Utility class for providing static predicates for rules, to help filter the rules.
*/
public class RuleSetUtils {
/**
* Predicate for checking if a rule is hidden.
*/
public static final Predicate<String> HIDDEN_RULE = new Predicate<String>() {
@Override
public boolean apply(final String input) {
try {
RuleClassType.INVISIBLE.checkName(input);
return true;
} catch (IllegalArgumentException e) {
return input.equals("testing_dummy_rule")
|| input.equals("testing_rule_for_mandatory_providers");
}
}
};
/**
* Predicate for checking if a rule has any mandatory attributes.
*/
public static final Predicate<RuleClass> MANDATORY_ATTRIBUTES = new Predicate<RuleClass>() {
@Override
public boolean apply(final RuleClass input) {
List<Attribute> li = new ArrayList<>(input.getAttributes());
return Iterables.any(li, MANDATORY);
}
};
/**
* Predicate for checking that the rule can have a deps attribute, and does not have any
* other mandatory attributes besides deps.
*/
public static final Predicate<RuleClass> DEPS_ONLY_ALLOWED = new Predicate<RuleClass>() {
@Override
public boolean apply(final RuleClass input) {
List<Attribute> li = new ArrayList<>(input.getAttributes());
// TODO(bazel-team): after the API migration we shouldn't check srcs separately
boolean emptySrcsAllowed = input.hasAttr("srcs", BuildType.LABEL_LIST)
? !input.getAttributeByName("srcs").isNonEmpty() : true;
if (!(emptySrcsAllowed && Iterables.any(li, DEPS))) {
return false;
}
Iterator<Attribute> it = li.iterator();
boolean mandatoryAttributesBesidesDeps =
Iterables.any(Lists.newArrayList(Iterators.filter(it, MANDATORY)), Predicates.not(DEPS));
return !mandatoryAttributesBesidesDeps;
}
};
/**
* Predicate for checking if a RuleClass has certain attributes
*/
public static class HasAttributes implements Predicate<RuleClass> {
private final List<Pair<String, Type<?>>> attributes;
public HasAttributes(Collection<Pair<String, Type<?>>> attributes) {
this.attributes = ImmutableList.copyOf(attributes);
}
@Override
public boolean apply(final RuleClass ruleClass) {
return attributes.stream().anyMatch(pair -> ruleClass.hasAttr(pair.first, pair.second));
}
}
public static Predicate<RuleClass> hasAnyAttributes(
Collection<Pair<String, Type<?>>> attributes) {
return new HasAttributes(attributes);
}
/**
* Predicate for checking if an attribute is mandatory.
*/
private static final Predicate<Attribute> MANDATORY = new Predicate<Attribute>() {
@Override
public boolean apply(final Attribute input) {
return input.isMandatory();
}
};
/**
* Predicate for checking if an attribute is the "deps" attribute.
*/
private static final Predicate<Attribute> DEPS = new Predicate<Attribute>() {
@Override
public boolean apply(final Attribute input) {
return input.getName().equals("deps");
}
};
/**
* Predicate for checking if a rule class is not in excluded.
*/
public static Predicate<String> notContainsAnyOf(final ImmutableSet<String> excluded) {
return Predicates.not(Predicates.in(excluded));
}
}
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