001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.maven.resolver.examples;
020
021import java.util.List;
022
023import org.apache.maven.resolver.examples.util.Booter;
024import org.eclipse.aether.RepositorySystem;
025import org.eclipse.aether.RepositorySystemSession.CloseableSession;
026import org.eclipse.aether.RepositorySystemSession.SessionBuilder;
027import org.eclipse.aether.artifact.DefaultArtifact;
028import org.eclipse.aether.collection.CollectRequest;
029import org.eclipse.aether.collection.CollectResult;
030import org.eclipse.aether.graph.Dependency;
031import org.eclipse.aether.graph.DependencyNode;
032import org.eclipse.aether.internal.impl.collect.bf.BfDependencyCollector;
033import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
034import org.eclipse.aether.util.graph.transformer.ChainedDependencyGraphTransformer;
035import org.eclipse.aether.util.graph.transformer.ConfigurableVersionSelector;
036import org.eclipse.aether.util.graph.transformer.ConflictResolver;
037import org.eclipse.aether.util.graph.transformer.JavaDependencyContextRefiner;
038import org.eclipse.aether.util.graph.transformer.JavaScopeDeriver;
039import org.eclipse.aether.util.graph.transformer.JavaScopeSelector;
040import org.eclipse.aether.util.graph.transformer.SimpleOptionalitySelector;
041import org.eclipse.aether.util.graph.visitor.DependencyGraphDumper;
042
043/**
044 * Demo of "nearest" vs "highest" winner selection.
045 */
046public class GetDependencyHierarchyWithConflictsStrategies {
047
048    /**
049     * Main.
050     * @param args
051     * @throws Exception
052     */
053    public static void main(String[] args) throws Exception {
054        System.out.println("------------------------------------------------------------");
055        System.out.println(GetDependencyHierarchyWithConflictsStrategies.class.getSimpleName());
056
057        CollectRequest collectRequest;
058
059        // okttp cleanly shows difference between nearest/closest
060        collectRequest = new CollectRequest();
061        collectRequest.setRootArtifact(new DefaultArtifact("demo:demo:1.0"));
062        collectRequest.setDependencies(
063                List.of(new Dependency(new DefaultArtifact("com.squareup.okhttp3:okhttp:jar:4.12.0"), "compile")));
064        runItWithStrategy(args, ConfigurableVersionSelector.NEAREST_SELECTION_STRATEGY, collectRequest);
065        runItWithStrategy(args, ConfigurableVersionSelector.HIGHEST_SELECTION_STRATEGY, collectRequest);
066
067        // MENFORCER-408 inspired
068        collectRequest = new CollectRequest();
069        collectRequest.setRootArtifact(new DefaultArtifact("demo:demo:1.0"));
070        collectRequest.setDependencies(List.of(
071                new Dependency(new DefaultArtifact("org.seleniumhq.selenium:selenium-java:jar:3.0.1"), "test")));
072        collectRequest.setManagedDependencies(List.of(
073                new Dependency(new DefaultArtifact("org.seleniumhq.selenium:selenium-java:jar:3.0.1"), "test"),
074                new Dependency(new DefaultArtifact("org.seleniumhq.selenium:selenium-remote-driver:jar:3.0.1"), "test"),
075                new Dependency(new DefaultArtifact("com.codeborne:phantomjsdriver:jar:1.3.0"), "test")));
076        runItWithStrategy(args, ConfigurableVersionSelector.NEAREST_SELECTION_STRATEGY, collectRequest);
077        runItWithStrategy(args, ConfigurableVersionSelector.HIGHEST_SELECTION_STRATEGY, collectRequest);
078    }
079
080    private static void runItWithStrategy(String[] args, String selectionStrategy, CollectRequest collectRequest)
081            throws Exception {
082        System.out.println();
083        System.out.println(selectionStrategy);
084        try (RepositorySystem system = Booter.newRepositorySystem(Booter.selectFactory(args))) {
085            SessionBuilder sessionBuilder = Booter.newRepositorySystemSession(system, Booter.selectFs(args));
086            sessionBuilder.setConfigProperty(ConflictResolver.CONFIG_PROP_VERBOSE, ConflictResolver.Verbosity.STANDARD);
087            sessionBuilder.setConfigProperty(DependencyManagerUtils.CONFIG_PROP_VERBOSE, true);
088            sessionBuilder.setConfigProperty(
089                    ConfigurableVersionSelector.CONFIG_PROP_SELECTION_STRATEGY, selectionStrategy);
090            sessionBuilder.setConfigProperty(
091                    BfDependencyCollector.CONFIG_PROP_SKIPPER, BfDependencyCollector.VERSIONED_SKIPPER);
092            try (CloseableSession session = sessionBuilder
093                    .setDependencyGraphTransformer(new ChainedDependencyGraphTransformer(
094                            new ConflictResolver(
095                                    new ConfigurableVersionSelector(),
096                                    new JavaScopeSelector(),
097                                    new SimpleOptionalitySelector(),
098                                    new JavaScopeDeriver()),
099                            new JavaDependencyContextRefiner()))
100                    .setRepositoryListener(null)
101                    .setTransferListener(null)
102                    .build()) {
103
104                collectRequest.setRepositories(Booter.newRepositories(system, session));
105
106                CollectResult result = system.collectDependencies(session, collectRequest);
107                System.out.println("tree:");
108                result.getRoot().accept(new DependencyGraphDumper(System.out::println));
109
110                List<DependencyNode> selected =
111                        system.flattenDependencyNodes(session, result.getRoot(), (node, parents) -> !node.getData()
112                                .containsKey(ConflictResolver.NODE_DATA_WINNER));
113                System.out.println("cp:");
114                selected.forEach(System.out::println);
115            }
116        }
117    }
118}