Looking into the code and doing some research I understood some things (please correct me if I'm wrong):

• this repo contains the source code of a bunch of other patches with your changes on top of everything
• Mario.bin and Luigi.bin come from Separate Luigi Graphics v3
• the bsnes settings files on the Release page can be written in the same manner as this one

I'm also guessing that every screen ratio must be built in a different manner, but I'm not sure how

Most likely graphics weren't provided to avoid copyright concerns and lower the chances of this repo (and to an extent Vitor himself) to be targeted with a C&D.

I'm also guessing that every screen ratio must be built in a different manner, but I'm not sure how

I was wrong, the final modified ROM is the same for all resolutions. The code has a bunch of defines that are injected by the emulator though the .bso config files.

I created, on my fork, a Makefile with some QoL improvements. To build from source:

make prepare # downloads *.bin files
cp /path/to/your/backup/smw/rom ./build/resources/smw.sfc
make assemble # creates a hacked ROM
make release  # creates a patch file

I also added a file watcher:

make watch # assembles the hacked ROM every time one of the source files changes

I'm going to write some docs and open a PR

I took a slightly different approach, would love to hear if it is a good one:

To make things easier I created a Github Action. Every time someone opens a PR it will generate the patch file and make it available for download. The problem with this is that the Action will need access to a legit personal game backup without letting anyone else access it.

I achieved this by creating a custom Dropbox App. This app requires authentication to download files, so I generated a token, added it as a Github Secret and used to configure a action that runs on every PR.

You can see a live example at https://github.com/m00qek/wide-snes/pull/2/checks . If you click on Artifacts, on the top right corner, you'll be able to download the patch (.bps file) but will have no access to the game backup.