Distro.pkg_files() takes a package name and returns a list of files in that
package. This commit generalizes that - pass None to it and get the list of
all packaged files in the system, and pass a list of strings to retrieve
all files belonging to the named packages.
The same arguments are propagated to _pkg_files(), which in turn propagates
them to list_files().
This allows faster generation of file lists than before. Having to retrieve
a list of matching packages and query each package for its contained files
can be collapsed into one or two backend calls.
Signed-off-by: Jan Lindemann <jan@janware.com>
Jan Lindemann
2fad5d189c