RPM Support

The problem:

• glibc depends on "/usr/bin/bash"
• according to libsolv, nothing provides "/usr/bin/bash"
• "/usr/bin/bash" is not present in the "provides" section of the "bash" package in primary.xml, but "/bin/bash" is. "/usr/bin/bash" is however listed in both the filelists.xml and a list of files present in primary.xml (why does primary.xml have a separate list)?
• on my local system, "rpm -q --whatprovides /usr/bin/bash" says that the bash package does provide it. same thing works with the other files listed in filelists.xml (even if not listed in primary.xml)
• so it seems like RPM/DNF look to the file list when answering questions about "provides", not just the "provides" section of the metadata, and Pulp does not do so

That should be easy enough to fix, but I really want answers to

• Why does primary.xml have a list of files separate and different from (strict subset of?) what is present in the filelists?
• Why is everything the package provides not simply listed in the "provides" section?

I'm guessing there's some kind of backwards compatibility reason to keep it separate, but the lack of documentation of any of this makes it extremely confusing.