ais-maven-enforcer

Rules for Maven Enforcer Plugin. JAR file is available in Maven Central

DependencyGroupVersionCheck

Verify, that dependencies sharing the same groupId share the same version.

Example: making sure, that all org.springframework dependencies are defined with the same version:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-enforcer-plugin</artifactId>
  <version>1.3.1</version>
  <executions>
    <execution>
      <id>enforce-spring/id>
      <goals>
        <goal>enforce</goal>
      </goals>
      <configuration>
        <rules>
          <dependencyGroupVersionCheck implementation="pl.ais.maven.enforcer.rules.DependencyGroupVersionCheck">
            <groupIds>
              <groupId>org.springframework</groupId>
            </groupIds>
          </dependencyGroupVersionCheck>
        </rules>
      </configuration>
    </execution>
  </executions>
  <dependencies>
      <dependency>
      <groupId>pl.ais.maven</groupId>
      <artifactId>ais-enforcer-rules</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>
</plugin>

Rule checks, if there's the same version within a group, so with multiple groups:

<rules>
  <dependencyGroupVersionCheck implementation="pl.ais.maven.enforcer.rules.DependencyGroupVersionCheck">
    <groupIds>
      <groupId>org.springframework</groupId>
      <groupId>org.slf4j</groupId>
    </groupIds>
  </dependencyGroupVersionCheck>
</rules>

org.springframework and org.slf4j will be checked independently.