# 2.5.13.53. MockBuildSRPM Step

The `MockBuildSRPM` step builds a SourceRPM based on a spec file and optionally a source directory:

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.MockBuildSRPM(root='default', spec='mypkg.spec'))

The step takes the following parameters

`root`

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

`resultdir`

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

`spec`

  Build the SourceRPM from this spec file.

`sources`

  Path to the directory containing the sources, defaulting to `.`.

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`.