# 2.5.13.54. MockRebuild

The `MockRebuild` step rebuilds a SourceRPM package:

Mock (http://fedoraproject.org/wiki/Projects/Mock) creates chroots and builds packages in them. It populates the changeroot with a basic system and the packages listed as build requirement. The type of chroot to build is specified with the `root` parameter. To use mock your Buildbot user must be added to the `mock` group.

    from buildbot.plugins import steps

    f.addStep(steps.MockRebuild(root='default', srpm='mypkg-1.0-1.src.rpm'))

The step takes the following parameters

`root`

  Uses chroot configuration defined in `/etc/mock/<root>.cfg`.

`resultdir`

  The directory where the logfiles and the SourceRPM are written to.

`srpm`

  The path to the SourceRPM to rebuild.

Note

It is necessary to pass the `resultdir` parameter to let the master watch for (and display) changes to `build.log`, `root.log`, and `state.log`.