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1   package org.apache.maven.project;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.util.Collection;
23  import java.util.HashMap;
24  import java.util.Map;
25  
26  import org.apache.maven.RepositoryUtils;
27  import org.apache.maven.artifact.Artifact;
28  import org.apache.maven.model.Dependency;
29  import org.apache.maven.model.DependencyManagement;
30  import org.apache.maven.model.Exclusion;
31  import org.apache.maven.model.InputLocation;
32  import org.apache.maven.model.InputSource;
33  import org.codehaus.plexus.component.annotations.Component;
34  import org.codehaus.plexus.component.annotations.Requirement;
35  import org.codehaus.plexus.logging.Logger;
36  import org.codehaus.plexus.util.StringUtils;
37  import org.eclipse.aether.DefaultRepositorySystemSession;
38  import org.eclipse.aether.RepositorySystem;
39  import org.eclipse.aether.RepositorySystemSession;
40  import org.eclipse.aether.RequestTrace;
41  import org.eclipse.aether.artifact.ArtifactProperties;
42  import org.eclipse.aether.artifact.ArtifactType;
43  import org.eclipse.aether.artifact.ArtifactTypeRegistry;
44  import org.eclipse.aether.collection.CollectRequest;
45  import org.eclipse.aether.collection.DependencyCollectionException;
46  import org.eclipse.aether.graph.DependencyFilter;
47  import org.eclipse.aether.graph.DependencyNode;
48  import org.eclipse.aether.graph.DependencyVisitor;
49  import org.eclipse.aether.resolution.ArtifactResult;
50  import org.eclipse.aether.resolution.DependencyRequest;
51  import org.eclipse.aether.util.artifact.ArtifactIdUtils;
52  import org.eclipse.aether.util.artifact.JavaScopes;
53  import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
54  
55  /**
56   * @author Benjamin Bentmann
57   */
58  @Component( role = ProjectDependenciesResolver.class )
59  public class DefaultProjectDependenciesResolver
60      implements ProjectDependenciesResolver
61  {
62  
63      @Requirement
64      private Logger logger;
65  
66      @Requirement
67      private RepositorySystem repoSystem;
68  
69      public DependencyResolutionResult resolve( DependencyResolutionRequest request )
70          throws DependencyResolutionException
71      {
72          RequestTrace trace = RequestTrace.newChild( null, request );
73  
74          DefaultDependencyResolutionResult result = new DefaultDependencyResolutionResult();
75  
76          MavenProject project = request.getMavenProject();
77          RepositorySystemSession session = request.getRepositorySession();
78          if ( logger.isDebugEnabled()
79              && session.getConfigProperties().get( DependencyManagerUtils.CONFIG_PROP_VERBOSE ) == null )
80          {
81              DefaultRepositorySystemSession verbose = new DefaultRepositorySystemSession( session );
82              verbose.setConfigProperty( DependencyManagerUtils.CONFIG_PROP_VERBOSE, Boolean.TRUE );
83              session = verbose;
84          }
85          DependencyFilter filter = request.getResolutionFilter();
86  
87          ArtifactTypeRegistry stereotypes = session.getArtifactTypeRegistry();
88  
89          CollectRequest collect = new CollectRequest();
90          collect.setRootArtifact( RepositoryUtils.toArtifact( project.getArtifact() ) );
91          collect.setRequestContext( "project" );
92          collect.setRepositories( project.getRemoteProjectRepositories() );
93  
94          if ( project.getDependencyArtifacts() == null )
95          {
96              for ( Dependency dependency : project.getDependencies() )
97              {
98                  if ( StringUtils.isEmpty( dependency.getGroupId() ) || StringUtils.isEmpty( dependency.getArtifactId() )
99                      || StringUtils.isEmpty( dependency.getVersion() ) )
100                 {
101                     // guard against case where best-effort resolution for invalid models is requested
102                     continue;
103                 }
104                 collect.addDependency( RepositoryUtils.toDependency( dependency, stereotypes ) );
105             }
106         }
107         else
108         {
109             Map<String, Dependency> dependencies = new HashMap<String, Dependency>();
110             for ( Dependency dependency : project.getDependencies() )
111             {
112                 String classifier = dependency.getClassifier();
113                 if ( classifier == null )
114                 {
115                     ArtifactType type = stereotypes.get( dependency.getType() );
116                     if ( type != null )
117                     {
118                         classifier = type.getClassifier();
119                     }
120                 }
121                 String key =
122                     ArtifactIdUtils.toVersionlessId( dependency.getGroupId(), dependency.getArtifactId(),
123                                                     dependency.getType(), classifier );
124                 dependencies.put( key, dependency );
125             }
126             for ( Artifact artifact : project.getDependencyArtifacts() )
127             {
128                 String key = artifact.getDependencyConflictId();
129                 Dependency dependency = dependencies.get( key );
130                 Collection<Exclusion> exclusions = dependency != null ? dependency.getExclusions() : null;
131                 org.eclipse.aether.graph.Dependency dep = RepositoryUtils.toDependency( artifact, exclusions );
132                 if ( !JavaScopes.SYSTEM.equals( dep.getScope() ) && dep.getArtifact().getFile() != null )
133                 {
134                     // enable re-resolution
135                     org.eclipse.aether.artifact.Artifact art = dep.getArtifact();
136                     art = art.setFile( null ).setVersion( art.getBaseVersion() );
137                     dep = dep.setArtifact( art );
138                 }
139                 collect.addDependency( dep );
140             }
141         }
142 
143         DependencyManagement depMngt = project.getDependencyManagement();
144         if ( depMngt != null )
145         {
146             for ( Dependency dependency : depMngt.getDependencies() )
147             {
148                 collect.addManagedDependency( RepositoryUtils.toDependency( dependency, stereotypes ) );
149             }
150         }
151 
152         DependencyRequest depRequest = new DependencyRequest( collect, filter );
153         depRequest.setTrace( trace );
154 
155         DependencyNode node;
156         try
157         {
158             collect.setTrace( RequestTrace.newChild( trace, depRequest ) );
159             node = repoSystem.collectDependencies( session, collect ).getRoot();
160             result.setDependencyGraph( node );
161         }
162         catch ( DependencyCollectionException e )
163         {
164             result.setDependencyGraph( e.getResult().getRoot() );
165             result.setCollectionErrors( e.getResult().getExceptions() );
166 
167             throw new DependencyResolutionException( result, "Could not resolve dependencies for project "
168                 + project.getId() + ": " + e.getMessage(), e );
169         }
170 
171         depRequest.setRoot( node );
172 
173         if ( logger.isWarnEnabled() )
174         {
175             for ( DependencyNode child : node.getChildren() )
176             {
177                 if ( !child.getRelocations().isEmpty() )
178                 {
179                     logger.warn( "The artifact " + child.getRelocations().get( 0 ) + " has been relocated to "
180                         + child.getDependency().getArtifact() );
181                 }
182             }
183         }
184 
185         if ( logger.isDebugEnabled() )
186         {
187             node.accept( new GraphLogger( project ) );
188         }
189 
190         try
191         {
192             process( result, repoSystem.resolveDependencies( session, depRequest ).getArtifactResults() );
193         }
194         catch ( org.eclipse.aether.resolution.DependencyResolutionException e )
195         {
196             process( result, e.getResult().getArtifactResults() );
197 
198             throw new DependencyResolutionException( result, "Could not resolve dependencies for project "
199                 + project.getId() + ": " + e.getMessage(), e );
200         }
201 
202         return result;
203     }
204 
205     private void process( DefaultDependencyResolutionResult result, Collection<ArtifactResult> results )
206     {
207         for ( ArtifactResult ar : results )
208         {
209             DependencyNode node = ar.getRequest().getDependencyNode();
210             if ( ar.isResolved() )
211             {
212                 result.addResolvedDependency( node.getDependency() );
213             }
214             else
215             {
216                 result.setResolutionErrors( node.getDependency(), ar.getExceptions() );
217             }
218         }
219     }
220 
221     class GraphLogger
222         implements DependencyVisitor
223     {
224 
225         private final MavenProject project;
226 
227         private String indent = "";
228 
229         private Map<String, Dependency> managed;
230 
231         public GraphLogger( MavenProject project )
232         {
233             this.project = project;
234         }
235 
236         public boolean visitEnter( DependencyNode node )
237         {
238             StringBuilder buffer = new StringBuilder( 128 );
239             buffer.append( indent );
240             org.eclipse.aether.graph.Dependency dep = node.getDependency();
241             if ( dep != null )
242             {
243                 org.eclipse.aether.artifact.Artifact art = dep.getArtifact();
244 
245                 buffer.append( art );
246                 buffer.append( ':' ).append( dep.getScope() );
247 
248                 String premanagedScope = DependencyManagerUtils.getPremanagedScope( node );
249                 if ( premanagedScope != null && !premanagedScope.equals( dep.getScope() ) )
250                 {
251                     buffer.append( " (scope managed from " ).append( premanagedScope );
252                     appendManagementSource( buffer, art, "scope" );
253                     buffer.append( ")" );
254                 }
255 
256                 String premanagedVersion = DependencyManagerUtils.getPremanagedVersion( node );
257                 if ( premanagedVersion != null && !premanagedVersion.equals( art.getVersion() ) )
258                 {
259                     buffer.append( " (version managed from " ).append( premanagedVersion );
260                     appendManagementSource( buffer, art, "version" );
261                     buffer.append( ")" );
262                 }
263             }
264             else
265             {
266                 buffer.append( project.getGroupId() );
267                 buffer.append( ':' ).append( project.getArtifactId() );
268                 buffer.append( ':' ).append( project.getPackaging() );
269                 buffer.append( ':' ).append( project.getVersion() );
270             }
271 
272             logger.debug( buffer.toString() );
273             indent += "   ";
274             return true;
275         }
276 
277         public boolean visitLeave( DependencyNode node )
278         {
279             indent = indent.substring( 0, indent.length() - 3 );
280             return true;
281         }
282 
283         private void appendManagementSource( StringBuilder buffer, org.eclipse.aether.artifact.Artifact artifact,
284                                              String field )
285         {
286             if ( managed == null )
287             {
288                 managed = new HashMap<String, Dependency>();
289                 if ( project.getDependencyManagement() != null )
290                 {
291                     for ( Dependency dep : project.getDependencyManagement().getDependencies() )
292                     {
293                         managed.put( dep.getManagementKey(), dep );
294                     }
295                 }
296             }
297 
298             String key =
299                 ArtifactIdUtils.toVersionlessId( artifact.getGroupId(), artifact.getArtifactId(),
300                                                 artifact.getProperty( ArtifactProperties.TYPE, "jar" ),
301                                                 artifact.getClassifier() );
302 
303             Dependency dependency = managed.get( key );
304             if ( dependency != null )
305             {
306                 InputLocation location = dependency.getLocation( field );
307                 if ( location != null )
308                 {
309                     InputSource source = location.getSource();
310                     if ( source != null )
311                     {
312                         buffer.append( " by " ).append( source.getModelId() );
313                     }
314                 }
315             }
316         }
317 
318     }
319 
320 }