Set Hudson build number from a script

Question

Is there a way to set the next build number in Hudson from a script?

I have the nextBuildNumber plug-in installed, and attempted to use wget with --post-data, but that page appears to require login.

I have two steps of a chained build and I want to keep the build numbers in sync.

Answer 1

There's a file named jobs/$JOBNAME/nextBuildNumber. It contains the next build number to be used in plain text.

Answer 2

Use HTTP authentication to log into your Hudson server with a user who has suitable privileges for scheduling a build.

The authenticating scripted clients page on the Hudson wiki describes this.