Re: [Gnu-arch-users] [BUG] libraries don't play well with partial mirrors

[Aaron Bentley]

Jason McCarty wrote:
> In my mirror of address@hidden, I used archive-mirror with limits to
> mirror tla--devo--1.3, but not tla--devo--1.2. With a greedy/sparse
> library, a get of tla--devo--1.3 causes the following:
>
> * ensuring library has address@hidden/tla--devo--1.3--patch-9
> * searching ancestor revision in library in archive address@hidden
> corrupt archive
>   name: address@hidden
>   location: /home/jason/arch/cache/address@hidden
>   revision: tla--devo--1.2--patch-115

That's another argument for local caches instead of local mirrors; in my 
opinion, a partial mirror isn't a mirror.  I get this error message 
fairly frequently, because writethrough commits update the local tree 
and the remote archive, but not the local mirror.

> It would be nice if library-adding understood that a missing ancestor
> revision may be due to a partial mirror, rather than a corrupt one, and
> to stop searching for ancestors at that point. 

Well, if you have a library revision for tla--devo--1.2--patch-114, you 
can't determine whether that's an ancestor of tla--devo--1.3--patch-2 
without consulting the revision data for all intermediate revisions.

It would sure help the backbuilder if stuff like this didn't cause 
immediate program termination.  The backbuilder doesn't need every 
arch_archive_connect to succeed, but arch_archive_connect will panic if 
it fails.

Aaron

--
Aaron Bentley
Director of Technology
Panometrics, Inc.