If multiple subversion modules are checked out for a build job, the following
problems occur:

1) The environment variable SVN_REVISION is empty. A solution could be to use
the first modules svn revision.

2) When auto tagging is turned on, the following exception occurs as a "." is
appended to the svn path instead of the projectname. A solution could be to
allow a fully user determined svn path instead of automatically appending the
projectname.

-----------------------------------------------------------------------------
There was no old tag at svn://<svn_server>/<repo_name>/tags/<job_name>/.
FATAL: null
java.lang.NumberFormatException: null
at java.lang.Long.parseLong(Long.java:372)
at java.lang.Long.valueOf(Long.java:518)
at hudson.plugins.svn_tag.SvnTagPlugin.perform(SvnTagPlugin.java:231)
at hudson.plugins.svn_tag.SvnTagPublisher.perform
(SvnTagPublisher.java:79)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep
(AbstractBuild.java:309)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep
(AbstractBuild.java:297)
at hudson.model.Build$RunnerImpl.cleanUp(Build.java:123)
at hudson.model.Run.run(Run.java:793)
at hudson.model.Build.run(Build.java:85)
at hudson.model.ResourceController.execute(ResourceController.java:70)
at hudson.model.Executor.run(Executor.java:82)