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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.List;
25  import java.util.Map;
26  
27  import org.apache.maven.RepositoryUtils;
28  import org.apache.maven.artifact.Artifact;
29  import org.apache.maven.model.Dependency;
30  import org.apache.maven.model.DependencyManagement;
31  import org.apache.maven.model.Exclusion;
32  import org.apache.maven.model.InputLocation;
33  import org.apache.maven.model.InputSource;
34  import org.codehaus.plexus.component.annotations.Component;
35  import org.codehaus.plexus.component.annotations.Requirement;
36  import org.codehaus.plexus.logging.Logger;
37  import org.codehaus.plexus.util.StringUtils;
38  import org.eclipse.aether.DefaultRepositorySystemSession;
39  import org.eclipse.aether.RepositorySystem;
40  import org.eclipse.aether.RepositorySystemSession;
41  import org.eclipse.aether.RequestTrace;
42  import org.eclipse.aether.artifact.ArtifactProperties;
43  import org.eclipse.aether.artifact.ArtifactType;
44  import org.eclipse.aether.artifact.ArtifactTypeRegistry;
45  import org.eclipse.aether.collection.CollectRequest;
46  import org.eclipse.aether.collection.DependencyCollectionException;
47  import org.eclipse.aether.graph.DependencyFilter;
48  import org.eclipse.aether.graph.DependencyNode;
49  import org.eclipse.aether.graph.DependencyVisitor;
50  import org.eclipse.aether.resolution.ArtifactResult;
51  import org.eclipse.aether.resolution.DependencyRequest;
52  import org.eclipse.aether.util.artifact.ArtifactIdUtils;
53  import org.eclipse.aether.util.artifact.JavaScopes;
54  import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
55  
56  /**
57   * @author Benjamin Bentmann
58   */
59  @Component( role = ProjectDependenciesResolver.class )
60  public class DefaultProjectDependenciesResolver
61      implements ProjectDependenciesResolver
62  {
63  
64      @Requirement
65      private Logger logger;
66  
67      @Requirement
68      private RepositorySystem repoSystem;
69  
70      @Requirement
71      private List<RepositorySessionDecorator> decorators;
72  
73      public DependencyResolutionResult resolve( DependencyResolutionRequest request )
74          throws DependencyResolutionException
75      {
76          final RequestTrace trace = RequestTrace.newChild( null, request );
77  
78          final DefaultDependencyResolutionResult result = new DefaultDependencyResolutionResult();
79  
80          final MavenProject project = request.getMavenProject();
81          final DependencyFilter filter = request.getResolutionFilter();
82          RepositorySystemSession session = request.getRepositorySession();
83          ArtifactTypeRegistry stereotypes = session.getArtifactTypeRegistry();
84  
85          if ( logger.isDebugEnabled()
86              && session.getConfigProperties().get( DependencyManagerUtils.CONFIG_PROP_VERBOSE ) == null )
87          {
88              DefaultRepositorySystemSession verbose = new DefaultRepositorySystemSession( session );
89              verbose.setConfigProperty( DependencyManagerUtils.CONFIG_PROP_VERBOSE, Boolean.TRUE );
90              session = verbose;
91          }
92  
93          for ( RepositorySessionDecorator decorator : decorators )
94          {
95              RepositorySystemSession decorated = decorator.decorate( project, session );
96              if ( decorated != null )
97              {
98                  session = decorated;
99              }
100         }
101 
102         CollectRequest collect = new CollectRequest();
103         collect.setRootArtifact( RepositoryUtils.toArtifact( project.getArtifact() ) );
104         collect.setRequestContext( "project" );
105         collect.setRepositories( project.getRemoteProjectRepositories() );
106 
107         if ( project.getDependencyArtifacts() == null )
108         {
109             for ( Dependency dependency : project.getDependencies() )
110             {
111                 if ( StringUtils.isEmpty( dependency.getGroupId() ) || StringUtils.isEmpty( dependency.getArtifactId() )
112                     || StringUtils.isEmpty( dependency.getVersion() ) )
113                 {
114                     // guard against case where best-effort resolution for invalid models is requested
115                     continue;
116                 }
117                 collect.addDependency( RepositoryUtils.toDependency( dependency, stereotypes ) );
118             }
119         }
120         else
121         {
122             Map<String, Dependency> dependencies = new HashMap<String, Dependency>();
123             for ( Dependency dependency : project.getDependencies() )
124             {
125                 String classifier = dependency.getClassifier();
126                 if ( classifier == null )
127                 {
128                     ArtifactType type = stereotypes.get( dependency.getType() );
129                     if ( type != null )
130                     {
131                         classifier = type.getClassifier();
132                     }
133                 }
134                 String key =
135                     ArtifactIdUtils.toVersionlessId( dependency.getGroupId(), dependency.getArtifactId(),
136                                                     dependency.getType(), classifier );
137                 dependencies.put( key, dependency );
138             }
139             for ( Artifact artifact : project.getDependencyArtifacts() )
140             {
141                 String key = artifact.getDependencyConflictId();
142                 Dependency dependency = dependencies.get( key );
143                 Collection<Exclusion> exclusions = dependency != null ? dependency.getExclusions() : null;
144                 org.eclipse.aether.graph.Dependency dep = RepositoryUtils.toDependency( artifact, exclusions );
145                 if ( !JavaScopes.SYSTEM.equals( dep.getScope() ) && dep.getArtifact().getFile() != null )
146                 {
147                     // enable re-resolution
148                     org.eclipse.aether.artifact.Artifact art = dep.getArtifact();
149                     art = art.setFile( null ).setVersion( art.getBaseVersion() );
150                     dep = dep.setArtifact( art );
151                 }
152                 collect.addDependency( dep );
153             }
154         }
155 
156         DependencyManagement depMngt = project.getDependencyManagement();
157         if ( depMngt != null )
158         {
159             for ( Dependency dependency : depMngt.getDependencies() )
160             {
161                 collect.addManagedDependency( RepositoryUtils.toDependency( dependency, stereotypes ) );
162             }
163         }
164 
165         DependencyRequest depRequest = new DependencyRequest( collect, filter );
166         depRequest.setTrace( trace );
167 
168         DependencyNode node;
169         try
170         {
171             collect.setTrace( RequestTrace.newChild( trace, depRequest ) );
172             node = repoSystem.collectDependencies( session, collect ).getRoot();
173             result.setDependencyGraph( node );
174         }
175         catch ( DependencyCollectionException e )
176         {
177             result.setDependencyGraph( e.getResult().getRoot() );
178             result.setCollectionErrors( e.getResult().getExceptions() );
179 
180             throw new DependencyResolutionException( result, "Could not resolve dependencies for project "
181                 + project.getId() + ": " + e.getMessage(), e );
182         }
183 
184         depRequest.setRoot( node );
185 
186         if ( logger.isWarnEnabled() )
187         {
188             for ( DependencyNode child : node.getChildren() )
189             {
190                 if ( !child.getRelocations().isEmpty() )
191                 {
192                     logger.warn( "The artifact " + child.getRelocations().get( 0 ) + " has been relocated to "
193                         + child.getDependency().getArtifact() );
194                 }
195             }
196         }
197 
198         if ( logger.isDebugEnabled() )
199         {
200             node.accept( new GraphLogger( project ) );
201         }
202 
203         try
204         {
205             process( result, repoSystem.resolveDependencies( session, depRequest ).getArtifactResults() );
206         }
207         catch ( org.eclipse.aether.resolution.DependencyResolutionException e )
208         {
209             process( result, e.getResult().getArtifactResults() );
210 
211             throw new DependencyResolutionException( result, "Could not resolve dependencies for project "
212                 + project.getId() + ": " + e.getMessage(), e );
213         }
214 
215         return result;
216     }
217 
218     private void process( DefaultDependencyResolutionResult result, Collection<ArtifactResult> results )
219     {
220         for ( ArtifactResult ar : results )
221         {
222             DependencyNode node = ar.getRequest().getDependencyNode();
223             if ( ar.isResolved() )
224             {
225                 result.addResolvedDependency( node.getDependency() );
226             }
227             else
228             {
229                 result.setResolutionErrors( node.getDependency(), ar.getExceptions() );
230             }
231         }
232     }
233 
234     class GraphLogger
235         implements DependencyVisitor
236     {
237 
238         private final MavenProject project;
239 
240         private String indent = "";
241 
242         private Map<String, Dependency> managed;
243 
244         public GraphLogger( MavenProject project )
245         {
246             this.project = project;
247         }
248 
249         public boolean visitEnter( DependencyNode node )
250         {
251             StringBuilder buffer = new StringBuilder( 128 );
252             buffer.append( indent );
253             org.eclipse.aether.graph.Dependency dep = node.getDependency();
254             if ( dep != null )
255             {
256                 org.eclipse.aether.artifact.Artifact art = dep.getArtifact();
257 
258                 buffer.append( art );
259                 buffer.append( ':' ).append( dep.getScope() );
260 
261                 String premanagedScope = DependencyManagerUtils.getPremanagedScope( node );
262                 if ( premanagedScope != null && !premanagedScope.equals( dep.getScope() ) )
263                 {
264                     buffer.append( " (scope managed from " ).append( premanagedScope );
265                     appendManagementSource( buffer, art, "scope" );
266                     buffer.append( ")" );
267                 }
268 
269                 String premanagedVersion = DependencyManagerUtils.getPremanagedVersion( node );
270                 if ( premanagedVersion != null && !premanagedVersion.equals( art.getVersion() ) )
271                 {
272                     buffer.append( " (version managed from " ).append( premanagedVersion );
273                     appendManagementSource( buffer, art, "version" );
274                     buffer.append( ")" );
275                 }
276             }
277             else
278             {
279                 buffer.append( project.getGroupId() );
280                 buffer.append( ':' ).append( project.getArtifactId() );
281                 buffer.append( ':' ).append( project.getPackaging() );
282                 buffer.append( ':' ).append( project.getVersion() );
283             }
284 
285             logger.debug( buffer.toString() );
286             indent += "   ";
287             return true;
288         }
289 
290         public boolean visitLeave( DependencyNode node )
291         {
292             indent = indent.substring( 0, indent.length() - 3 );
293             return true;
294         }
295 
296         private void appendManagementSource( StringBuilder buffer, org.eclipse.aether.artifact.Artifact artifact,
297                                              String field )
298         {
299             if ( managed == null )
300             {
301                 managed = new HashMap<String, Dependency>();
302                 if ( project.getDependencyManagement() != null )
303                 {
304                     for ( Dependency dep : project.getDependencyManagement().getDependencies() )
305                     {
306                         managed.put( dep.getManagementKey(), dep );
307                     }
308                 }
309             }
310 
311             String key =
312                 ArtifactIdUtils.toVersionlessId( artifact.getGroupId(), artifact.getArtifactId(),
313                                                 artifact.getProperty( ArtifactProperties.TYPE, "jar" ),
314                                                 artifact.getClassifier() );
315 
316             Dependency dependency = managed.get( key );
317             if ( dependency != null )
318             {
319                 InputLocation location = dependency.getLocation( field );
320                 if ( location != null )
321                 {
322                     InputSource source = location.getSource();
323                     if ( source != null )
324                     {
325                         buffer.append( " by " ).append( source.getModelId() );
326                     }
327                 }
328             }
329         }
330 
331     }
332 
333 }