Finding duplicated code in C#

By default, the maven-pmd-plugin only supports the languages Java, JavaScript and JSP. But CPD supports many more languages, e.g. C#. In order to enable C# in your build, you need to configure several parts:

• Add an additional plugin dependency for c# (pmd-cs module)
• Select the language cs.
• Configure the includes filter to consider *.cs (otherwise only java files will be analyzed)
• Configure the source directory (by default, only src/main/java is analyzed)

  <project>
    ...
    <build>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-pmd-plugin</artifactId>
          <version>3.21.2</version>
          <configuration>
            <language>cs</language>
            <minimumTokens>10</minimumTokens>
            <includes>
              <include>**/*.cs</include>
            </includes>
            <compileSourceRoots>
              <compileSourceRoot>${basedir}/src/main/cs</compileSourceRoot>
            </compileSourceRoots>
            <printFailingErrors>true</printFailingErrors>
          </configuration>
          <executions>
            <execution>
              <goals>
                <goal>cpd-check</goal>
              </goals>
            </execution>
          </executions>
          <dependencies>
              <dependency>
                  <groupId>net.sourceforge.pmd</groupId>
                  <artifactId>pmd-cs</artifactId>
                  <version>6.55.0</version>
              </dependency>
          </dependencies>
        </plugin>
        ...
      </plugins>
    </build>
  </project>
  

  In this example, the C# source files are located in src/main/cs.

  Note: The version for net.sourceforge.pmd:pmd-cs needs to match the PMD version, that is being used. If you upgrade PMD at runtime you'll need to make sure, to change the version here as well.