| package org.apache.maven.resolver.examples.util; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.io.PrintStream; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.aether.artifact.Artifact; |
| import org.eclipse.aether.graph.Dependency; |
| import org.eclipse.aether.graph.DependencyNode; |
| import org.eclipse.aether.graph.DependencyVisitor; |
| import org.eclipse.aether.util.artifact.ArtifactIdUtils; |
| import org.eclipse.aether.util.graph.manager.DependencyManagerUtils; |
| import org.eclipse.aether.util.graph.transformer.ConflictResolver; |
| |
| /** |
| * A dependency visitor that dumps the graph to the console. |
| */ |
| public class ConsoleDependencyGraphDumper |
| implements DependencyVisitor |
| { |
| |
| private PrintStream out; |
| |
| private List<ChildInfo> childInfos = new ArrayList<>(); |
| |
| public ConsoleDependencyGraphDumper() |
| { |
| this( null ); |
| } |
| |
| public ConsoleDependencyGraphDumper( PrintStream out ) |
| { |
| this.out = ( out != null ) ? out : System.out; |
| } |
| |
| public boolean visitEnter( DependencyNode node ) |
| { |
| out.println( formatIndentation() + formatNode( node ) ); |
| childInfos.add( new ChildInfo( node.getChildren().size() ) ); |
| return true; |
| } |
| |
| private String formatIndentation() |
| { |
| StringBuilder buffer = new StringBuilder( 128 ); |
| for ( Iterator<ChildInfo> it = childInfos.iterator(); it.hasNext(); ) |
| { |
| buffer.append( it.next().formatIndentation( !it.hasNext() ) ); |
| } |
| return buffer.toString(); |
| } |
| |
| private String formatNode( DependencyNode node ) |
| { |
| StringBuilder buffer = new StringBuilder( 128 ); |
| Artifact a = node.getArtifact(); |
| Dependency d = node.getDependency(); |
| buffer.append( a ); |
| if ( d != null && d.getScope().length() > 0 ) |
| { |
| buffer.append( " [" ).append( d.getScope() ); |
| if ( d.isOptional() ) |
| { |
| buffer.append( ", optional" ); |
| } |
| buffer.append( "]" ); |
| } |
| String premanaged = DependencyManagerUtils.getPremanagedVersion( node ); |
| if ( premanaged != null && !premanaged.equals( a.getBaseVersion() ) ) |
| { |
| buffer.append( " (version managed from " ).append( premanaged ).append( ")" ); |
| } |
| |
| premanaged = DependencyManagerUtils.getPremanagedScope( node ); |
| if ( premanaged != null && !premanaged.equals( d.getScope() ) ) |
| { |
| buffer.append( " (scope managed from " ).append( premanaged ).append( ")" ); |
| } |
| DependencyNode winner = (DependencyNode) node.getData().get( ConflictResolver.NODE_DATA_WINNER ); |
| if ( winner != null && !ArtifactIdUtils.equalsId( a, winner.getArtifact() ) ) |
| { |
| Artifact w = winner.getArtifact(); |
| buffer.append( " (conflicts with " ); |
| if ( ArtifactIdUtils.toVersionlessId( a ).equals( ArtifactIdUtils.toVersionlessId( w ) ) ) |
| { |
| buffer.append( w.getVersion() ); |
| } |
| else |
| { |
| buffer.append( w ); |
| } |
| buffer.append( ")" ); |
| } |
| return buffer.toString(); |
| } |
| |
| public boolean visitLeave( DependencyNode node ) |
| { |
| if ( !childInfos.isEmpty() ) |
| { |
| childInfos.remove( childInfos.size() - 1 ); |
| } |
| if ( !childInfos.isEmpty() ) |
| { |
| childInfos.get( childInfos.size() - 1 ).index++; |
| } |
| return true; |
| } |
| |
| private static class ChildInfo |
| { |
| |
| final int count; |
| |
| int index; |
| |
| ChildInfo( int count ) |
| { |
| this.count = count; |
| } |
| |
| public String formatIndentation( boolean end ) |
| { |
| boolean last = index + 1 >= count; |
| if ( end ) |
| { |
| return last ? "\\- " : "+- "; |
| } |
| return last ? " " : "| "; |
| } |
| |
| } |
| |
| } |