Is there a maven plugin that verifies that all dependencies are releases?

The 'maven-release-plugin' has this feature, but it is not available as separate goal.

I think I have seen this functionality somewhere, but I can't find it again. Would be great if somebody knows where to fi开发者_运维问答nd such a plugin.

The maven enforcer plugin has a requireReleaseDeps rule allowing to enforce that no snapshots are included as dependencies. It may be what you're looking for.

If you configure the plugin like this (check the rule documentation for more options):

<project>
  [...]
  <build>
   <plugins>
     <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-enforcer-plugin</artifactId>
        <version>1.0-beta-1</version>
        <configuration>
          <rules>
            <requireReleaseDeps>
              <message>No Snapshots Allowed!</message>
            </requireReleaseDeps>
          </rules>
        </configuration>
      </plugin>
    </plugins>
  </build>
  [...]
</project>

Then calling mvn enforcer:enforce will do the job.

Using release:prepare together with dryRun=true should do what you want.