Provided by:
debhelper_7.0.13ubuntu1_all 
NAME
dh_prep - preform cleanups in preparation for building a binary package
SYNOPSIS
dh_prep [debhelper options] [-Xitem]
DESCRIPTION
dh_prep is a debhelper program that performs some file cleanups in
preparation for building a package. (This is what dh_clean -k used to
do.) It removes the package build directories, debian/tmp, and some
temp files that are generated during the build. Putting this at the
start of the build process makes the build process idempotent.
OPTIONS
-Xitem --exclude=item
Exclude files that contain "item" anywhere in their filename from
being deleted, even if they would normally be deleted. You may use
this option multiple times to build up a list of things to exclude.
SEE ALSO
debhelper(7)
This program is a part of debhelper.
AUTHOR
Joey Hess <joeyh@debian.org>