[Gnu-arch-users] Avoiding ancestor scan during get with revision library

[Richard Curnow]

Supposing I have a revision library set up, and I do a get on a remote
http:// archive to do an initial checkout.  There are several hundred
patches between the import revision and the patchlevel I'm getting,
across several branches/versions, all in the same remote archive.  The
patchlevel I'm getting actually has a cacherev in the archive.

None of the ancestors are present in my revision library, and (at least
for now), I've no interest in any of them being added to it.  I
literally want only the working copy, + a clean version of it put into
my revision library.

(If I ever want one of the ancestors, I'm totally prepared to take the
hit that the revlib's hard-linking will become sub-optimal).

When I do the 'tla get' command, tla starts searching backwards for an
ancestor:

* ensuring library has address@hidden/a--b--c.d--patch-NNN
* searching ancestor revision in library in archive address@hidden

I assume tla is examining each patch's log in the remote archive to find
continuations, so it can check if an ancestor is already in my revlib.
The trouble is, this is extremely slow; nothing appears after the
"searching.." message for several minutes.  (I guess there's some
connection setup latency due to firewall and/or web-proxy issues.)

Is there any way of telling 'tla get' (or 'tla library-add' for that
matter) that I want it to go straight to the cacherev and use that, and
forget about trying to hardlink to an ancestor at all?  The checkout
would then be done in a second or two instead of many minutes.

Cheers
Richard

-- 
Richard \\\ SH-4/SH-5 Core & Debug Architect
Curnow  \\\         SuperH (UK) Ltd, Bristol