registry: Remove the receipt_flat storage

[raimue (Rainer Müller)]

MacPorts used to have an older storage format for its registry, which is known as "receipt_flat" in base. The "receipt_flat" was already removed, but there is still an upgrade path if such an old registry is detected.

I propose we rip out everything about "receipt_flat", even the existing upgrade path, which is the only code still using it. I doubt anybody still has such an old installation of MacPorts before version 1.9.0, which introduced registry 2.0. The best upgrade path for that would be to completely reinstall MacPorts anyway. We already have checks in both configure and the preflight script that can be updated, as we are already not supporting upgrades of installations older than 1.7.1.

This includes ripping out all calls to open_file_map/close_file_map and open_dep_map/close_dep_map, which are just noop on receipt_sqlite anyway.

[jmroot (Joshua Root)]

Ticket retargeted after milestone closed