Normally you deploy to a third party repository with a command similar to:

mvn deploy:deploy-file -Dfile=/path/to/file -DrepositoryId=repositoryId
-Durl=wagon:protocol://path/to/repo -DgroupId=groupId -DartifactId=artifactId
-Dversion=version -Dpackaging=packageType

But - to deploy via webdav needs a snapshot wagon.

To do this - create a temporary pom in the directory you are in (create a scratch dir or similar). This should contain:

<project>
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.example</groupId>
   <artifactId>webdav-deploy</artifactId>
   <packaging>pom</packaging>
   <version>1</version>
   <name>Webdav Deployment POM</name>

   <build>
      <extensions>
         <extension>
            <groupId>org.apache.maven.wagon</groupId>
            <artifactId>wagon-webdav</artifactId>
            <version>1.0-beta-2</version>
         </extension>
      </extensions>
   </build>
</project>

(thanks to the maven archiva docs for this pom).

Now - in that directory you can now run something similar to

mvn deploy:deploy-file -Dfile=/path/to/file -DrepositoryId=repositoryId
-Durl=dav:protocol://path/to/repo -DgroupId=groupId -DartifactId=artifactId
-Dversion=version -Dpackaging=packageType