Excluding transitive dependencies of plugins

[Gaurav Gupta]

Hi,

I have a use case where I need to exclude transitive dependency of a plugin.
I am using following plugin

<groupId>org.codehaus.mojo</groupId>
<artifactId>cobertura-maven-plugin</artifactId>
<version>2.7</version>

This has transitive dependency on logback-classic. To exclude this
dependency, I tried following two options

1.
<build>

  <plugins>
    <plugin>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>cobertura-maven-plugin</artifactId>
      <version>2.7</version>
      <dependencies>
        <dependency>
          <groupId>net.sourceforge.cobertura</groupId>
          <artifactId>cobertura</artifactId>
          <version>2.1.1</version>
          <exclusions>
            <exclusion>
              <groupId>ch.qos.logback</groupId>
              <artifactId>logback-classic</artifactId>
            </exclusion>
          </exclusions>
        </dependency>
      </dependencies>
      <configuration>
        <check></check>
      </configuration>
      <executions>
        <execution>
          <phase>process-classes</phase>
          <goals>
            <goal>instrument</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

2. <build>

  <plugins>
    <plugin>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>cobertura-maven-plugin</artifactId>
      <version>2.7</version>
      <configuration>
        <check></check>
      </configuration>
      <executions>
        <execution>
          <phase>process-classes</phase>
          <goals>
            <goal>instrument</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

<dependencies>
  <dependency>
    <groupId>net.sourceforge.cobertura</groupId>
    <artifactId>cobertura</artifactId>
    <version>2.1.1</version>
    <exclusions>
      <exclusion>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
      </exclusion>
    </exclusions>
  </dependency>
</dependencies>


But with both options I see that logback-classic is downloaded.
Can someone please point me to correct usage of this?

Thanks
Gaurav