[Gnu-arch-users] Progress on backbuilder

[Aaron Bentley]

Hi all,
I'm pleased to say I've made progress on "the backbuilder".  That is, 
the ability to build an older revision backwards from a newer revision.

It now respects continuations anywhere in a branch.  There's still some 
tweaking to go before it's ready for integration, (and some test cases 
to write and such).  But the current code works, and doesn't use unsafe 
optimizations.

Tom, please have a look at scan_archive (), because I think it's The 
Future.  It's an attempt to make a good tradeoff between getting as much 
at once as possible (for pipelining/parallel operations, etc), and not 
retrieving anything we don't need (for serial operations).  The result 
is a bit ugly, but I don't see a prettier alternative.

I imagine making it an archive operation, with the current 
implementation used for serial pfses, and a new implementation for http 
(and sftp? I've read it supports simultaneous operations).  That should 
win back most of the speed the back-builder loses by grovelling through 
every revision between the target and the library/pristine revision.

My latest:
address@hidden/tlasrc--backbuild--0--patch-48
http://sourcecontrol.net/~abentley/archives/tlasrc

Aaron