Make it easy to install extra binaries into subdirectories of extra-pkg. This makes it easier to manage the extra-pkg directory when it contains manually added packages and automatically added packages from one of the package tracks by putting the automatically added packages into extra-pkg/auto and manually added packages into extra-pkg/manual. To this end, add parameter subdir to PBuilder.add_binaries_to_extra_pkg method with default value "auto". Adapt the test case accordingly. Also add the command line argument --subdir to bin/treepkgbuilder.py add-binaries command, this time with default value "manual".

From: TreePackager <treepkg@example.com>
To: Project Developemen List <project-devel@example.com>
Subject: TreePackager: error builder %(track)s rev. %(revision)s
MIME-Version: 1.0
Content-type: text/plain

Hello,

an error occurred while building the %(track)s packages for revision
%(revision)s.  Details are available in the build log:

  http://example.com/treepkg/%(track)s/%(revision)s-%(rules_revision)s/build_log.txt

General information about the status of the packages is available at

  http://example.com/treepkg/