https://github.com/BeeStation/BeeStation-Hornet/pull/7375/checks?check_run_id=8664935717
https://mdb2.affectedarc07.co.uk/images/162356927/8664935717/m/0/0-after.png

Just ran this test run, the raw links result in a 404 Not Found error and none of the preview images load.
The diff in question is very large, however there are smaller diffs on the PR that this also occurs on

MDB2 Fails on this PR, but MDB succeeds on it.

Stacktrace:

Doing the renderance

Caused by:
0: Fetching and constructing diffs
1: cannot locate local branch 'pull/844/head:mdb-ad2178497df08cccbe00453fe957db78efc225cd-36d164e3b92bcb9f3ab8392d8a1673919378d03e'; class=Reference (4); code=InvalidSpec (-12)

PR in Question:
cmss13-devs/cmss13#844

I was wondering if maybe there could be some sort of minimum picture area, for pull requests that change just a single tile it can be hard to see what they actually do, especcialy if its a wall item or something of that sort
Otherwise than that I like this bot much more.
Maybe instead of just showing one tile it could show a 3x3 area or even a 5x5 area?
Thanks

• Code-based git bindings (shell calls dont let us easily track output and are kinda jank)
• Git clone status reporting (likely requires the above)
• More sane checking for if we have a repo or not (just an fexists will suffice instead of the current clone -> fail) mentality
• IDB style diff splitting if theres a ton of maps rendered
• Diff image showing

I will definitely forget some things but this is a non-exhaustive list for now

Stumbled across this today. If you resize a map file in a PR, MDB2 fails to generate any diffs and new/old/diff return 404 errors. The original mapdiffbot seems to at least be able to render this, though it shows the whole map as changed.

Take a look at the run here for an example. This resized oldstation.dmm.

https://github.com/tgstation/tgstation/pull/67323/checks?check_run_id=6616462105

https://github.com/yogstation13/Yogstation/pull/15024/checks

stuff down there was changed but isnt shown because the modified items are pixel shifted (pixel_y = -28) to be on the wall

it is TECHNICALLY in frame but isnt visually shown