If debclean is invoked from a directory that is already a Debian source package, it will not descend into its subdirectories.
Also, if the --cleandebs option is given, then in every directory containing a Debian source tree, all files named *.deb, *.changes and *.build are removed. The .dsc, .diff.gz and the (.orig).tar.gz files are not touched so that the release can be reconstructed if necessary, and the .upload files are left so that debchange functions correctly. The --nocleandebs option prevents this extra cleaning behaviour and the --cleandebs option forces it. The default is not to clean these files.
debclean uses debuild(1) to clean the source tree.
DEVSCRIPTS_CHECK_DIRNAME_LEVEL can take the following values:
0 Never check the directory name.
1 Only check the directory name if we have had to change directory in our search for debian/changelog. This is the default behaviour.
2 Always check the directory name.
The directory name is checked by testing whether the current directory name (as determined by pwd(1)) matches the regex given by the configuration file option DEVSCRIPTS_CHECK_DIRNAME_REGEX or by the command line option --check-dirname-regex regex. Here regex is a Perl regex (see perlre(3perl)), which will be anchored at the beginning and the end. If regex contains a '/', then it must match the full directory path. If not, then it must match the full directory name. If regex contains the string \'PACKAGE', this will be replaced by the source package name, as determined from the changelog. The default value for the regex is: \'PACKAGE(-.+)?', thus matching directory names such as PACKAGE and PACKAGE-version.
--cleandebs Also remove all .deb, .changes and .build files from the parent directory.
--nocleandebs Do not remove the .deb, .changes and .build files from the parent directory; this is the default behaviour.
--check-dirname-level N See the above section Directory name checking for an explanation of this option.
--check-dirname-regex regex See the above section Directory name checking for an explanation of this option.
--no-conf, --noconf Do not read any configuration files. This can only be used as the first option given on the command-line.
-d Do not run dpkg-checkbuilddeps to check build dependencies.
--help Display a help message and exit successfully.
--version Display version and copyright information and exit successfully.
DEBCLEAN_CLEANDEBS If this is set to yes, then it is the same as the --cleandebs command line parameter being used.
DEVSCRIPTS_CHECK_DIRNAME_LEVEL ", " DEVSCRIPTS_CHECK_DIRNAME_REGEX See the above section Directory name checking for an explanation of these variables. Note that these are package-wide configuration variables, and will therefore affect all devscripts scripts which check their value, as described in their respective manpages and in devscripts.conf(5).