The target pkg-delete-ours, invoked from the projects directory, should wipe all packages from the system which have been created and installed via jw-pkg.
Currently they are selected via url =~ janware. This is a default string which can be overridden by redefining JANWARE_PACKAGE_FILTER. This might not be the most generic name, but is kind of consistent and will be matched once all variables get renamed to a more generic naming scheme.
This currently does not get all packages: Some are not labeled with URLs matching "janware", because jw-pkg is only used as a convenient way to package other people's open source projects.
Signed-off-by: Jan Lindemann <jan@janware.com>