Feature: Make balc take in a custom input for updating a single input

[NovaViper]

Hey, I want to use balc in a custom updater justfile recipe that I tell it to update a specific flake input, and it goes and checks if there are any new updates available for said specific flake input. It currently tries to update every single input

menu/packages/balc/balc.fish

Line 30 in d37e7a9

nix flake update || exit

but I want it to only update the specified input I give it

My justfile script is this

[doc('Update a given flake input, {{INPUT}}')]
@update-input INPUT:
    balc {{ INPUT }} || exit
    git commit --quiet --message "chore: update {{ INPUT }}" flake.lock
    if [ ! $(git ls-remote origin --quiet) ]; then \ echo "Can't reach the remote repo to push. Try pushing again later."; \ git restore flake.lock; \ exit 1; \ fi
    git push origin master

[llakala]

Balc is an internal tool. My idea was always to have an alternative script to balc, which could be used via a feature flag, and would have the behavior you're talking about. If you'd like to contribute, feel free - this has been on my TODO list for ages, but I haven't gotten to it.