Add some documentation for dep steps.

master/docs/manual/cfg-buildsteps.rst

@@ -2640,6 +2640,61 @@ The step takes the following parameters
 ``srpm``
     The path to the SourceRPM to rebuild.
 
+DEB-Related Steps
+-----------------
+
+DebPbuilder
++++++++++++
+
+The :bb:step:`DebPbuilder` step builds Debian packages within a chroot
+built by pbuilder. 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 ``distribution``, ``distribution`` and
+``mirror`` parameter. To use pbuilder your buildbot must have the right to
+run pbuilder as root throug sudo. ::
+
+    from buildbot.steps.package.deb import DepPbuilder
+    f.addStep(DepPbuilder())
+
+The step takes the following parameters
+
+``architecture``
+    Architecture to build chroot for.
+
+``distribution``
+    Name, or nickname, of the dirstribution. Defaults to 'stable'.
+
+``basetgz``
+    Path of the basetgz to use for building.
+
+``mirror``
+    URL of the mirror used to download the packages from.
+
+``extrapackages``
+    List if packages to install in addition to the base system.
+
+``keyring``
+    Path to a gpg keyring to verify the downloaded packages. This is necessary
+    if you build for a forain distribution.
+
+``components``
+    Repos to activate for chroot building.
+
+DebCowbuilder
++++++++++++++
+
+The :bb:step:`DebCowbuilder` step is a subclass of :bb:step:`DebPbuilder`,
+which use cowbuilder instead of pbuilder.
+
+DebLintian
+++++++++++
+
+The :bb:step:`DebLintian` step checks a build .deb for bugs and policy
+violations. The packages or changes file to test is specified in ``fileloc`` ::
+
+    from buildbot.steps.package.deb import DebLintian
+    f.addStep(DebLintian(fileloc=WithProperties("%(deb-changes)s"):wq
+
 Miscellaneous BuildSteps
 ------------------------