1 files changed, 109 insertions, 0 deletions
diff --git a/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/plugin/internal/WagonExcluder.java b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/plugin/internal/WagonExcluder.java
new file mode 100644
index 00000000..43e8cfc4
--- /dev/null
+++ b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/plugin/internal/WagonExcluder.java
@@ -0,0 +1,109 @@
+package org.apache.maven.plugin.internal;
+
+/*
+ * 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 org.eclipse.aether.artifact.Artifact;
+import org.eclipse.aether.collection.DependencyCollectionContext;
+import org.eclipse.aether.collection.DependencySelector;
+import org.eclipse.aether.graph.Dependency;
+
+/**
+ * Assists in detecting wagon providers brought into the plugin class path via legacy Maven core artifacts (e.g.
+ * maven-core:2.0.6) and excluding them. A plugin should be able to explicitly declare dependencies on specific wagons
+ * for its use. However, the (old) wagons pulled in transitively via legacy Maven core artifacts are usually not
+ * intended as dependencies and more importantly screw up artifact resolution because they would get preferred over the
+ * core wagon versions. This is a hack to provide backward-compat with Maven 2 (MNG-4528, MNG-4561).
+ *
+ * @author Benjamin Bentmann
+ */
+class WagonExcluder
+    implements DependencySelector
+{
+
+    private final boolean coreArtifact;
+
+    public WagonExcluder()
+    {
+        this( false );
+    }
+
+    private WagonExcluder( boolean coreArtifact )
+    {
+        this.coreArtifact = coreArtifact;
+    }
+
+    public boolean selectDependency( Dependency dependency )
+    {
+        return !coreArtifact || !isWagonProvider( dependency.getArtifact() );
+    }
+
+    public DependencySelector deriveChildSelector( DependencyCollectionContext context )
+    {
+        if ( coreArtifact || !isLegacyCoreArtifact( context.getDependency().getArtifact() ) )
+        {
+            return this;
+        }
+        else
+        {
+            return new WagonExcluder( true );
+        }
+    }
+
+    private boolean isLegacyCoreArtifact( Artifact artifact )
+    {
+        String version = artifact.getVersion();
+        return version != null && version.startsWith( "2." ) && artifact.getArtifactId().startsWith( "maven-" )
+            && artifact.getGroupId().equals( "org.apache.maven" );
+    }
+
+    private boolean isWagonProvider( Artifact artifact )
+    {
+        if ( "org.apache.maven.wagon".equals( artifact.getGroupId() ) )
+        {
+            return artifact.getArtifactId().startsWith( "wagon-" );
+        }
+        return false;
+    }
+
+    @Override
+    public boolean equals( Object obj )
+    {
+        if ( obj == this )
+        {
+            return true;
+        }
+        else if ( obj == null || !getClass().equals( obj.getClass() ) )
+        {
+            return false;
+        }
+
+        WagonExcluder that = (WagonExcluder) obj;
+        return coreArtifact == that.coreArtifact;
+    }
+
+    @Override
+    public int hashCode()
+    {
+        int hash = getClass().hashCode();
+        hash = hash * 31 + ( coreArtifact ? 1 : 0 );
+        return hash;
+    }
+
+}