tree 178e3a4a95189e85e618fb966320e805961cb666
parent 3ac3a2ecfab884ff26939834578ce731ee1778ac
author Serge Bazanski <serge@monogon.tech> 1680101296 +0200
committer Serge Bazanski <serge@monogon.tech> 1680105803 +0000

m/pkg/logtree: fix exact backlog fetch, head/tail confusion

This started off as 'hm, the backlog data returned seems wrong'. I
realized we had no test for that, so I added one. It was indeed broken.

This was because we had two simultaneous bugs: we confused head/tail
between docs and different parts of the code, and we forgot to do a
reverse operation when scanning/retrieving journal entries.

With those two fixed, we also implement backlog retrieval in a optimized
fashion, but not scanning/retrieving more entries that is necessary.

Finally, we drive-by fix a massacred ASCII graphic in a comment.

Change-Id: I2ec5dd9b5b58f66fbc015c142feb91bd92038e4f
Reviewed-on: https://review.monogon.dev/c/monogon/+/1430
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>