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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;
}
}
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