------
 Using an other Shader Implementation
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 Olivier Lamy
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 2012-03-13
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~~ 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.

Using your own Shader implementation

  By default, the plugin provide a DefaultShader implementation but with version 1.6 you can use your own implementation.

  Create a standard Maven project with your implementation.

+-----

Dependency to Plexus annotations

    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-component-annotations</artifactId>
      <version>1.5.5</version>
    </dependency>

Create your Shader

@Component( role = Shader.class, hint = "mock" )
public class MockShader
    implements Shader
{
  // implement the interface here
}

// Use the plexus component metadata plugin in your job to generate Plexus metadata

      <plugin>
        <groupId>org.codehaus.plexus</groupId>
        <artifactId>plexus-component-metadata</artifactId>
        <version>1.5.5</version>
        <executions>
          <execution>
            <goals>
              <goal>generate-metadata</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
+-----

  Assuming your project has coordinate org.foo.bar:wine:1.0, you must add it as a dependency of the shade plugin.

+-----
<project>
  ...
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>${project.version}</version>
        <dependencies>
          <dependency>
            <groupId>org.foo.bar</groupId>
            <artifactId>wine</artifactId>
            <version>1.0</version>
          </dependency>
        </dependencies>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <shaderHint>mock</shaderHint>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  ...
</project>
+-----

  Now the mojo will use your own implementation.