Working on the modpack requires the packwiz tool, so be sure to download it first.
packwiz update --all # Update all mods to latest.
git commit [...] # Now you can commit your changes..
git push # ..and push them to the repository.
It should be noted that packwiz will keep an index.toml file and update pack.toml to keep track of it, mirroring any changes. However, since these changes are basically build artifacts, we decided to not include them in the repository.
# Make sure git will not see any changes to pack.toml.
# This is to avoid accidentally committing the [index] section.
git update-index --assume-unchanged pack.toml
To test changes locally, you can run packwiz serve to deploy a simple webserver that just hosts the modpack files. Setting your instance's pre-launch command to the following command will allow it to update from local files when starting up.
"$INST_JAVA" -jar packwiz-installer-bootstrap.jar http//localhost:8080/pack.toml
While the game is running, you can for example use rsync to synchronize the kubejs/ folder after making changes. This allows you to make recipe changes and more, and test them out in-game, without restarting, simply by running the /reload command.
# Just replace $PATH_TO_INSTANCE with your instance's location.
rsync -r --delete kubejs $PATH_TO_INSTANCE/.minecraft