Yesterday I heard of https://quickshell.outfoxxed.me/ but have never tried it myself. They have some pretty decent examples of widgets on their homepage. I think they have their own little langauge called QML which appears to be turing-complete.
Waybar uses GTK stylesheets for the theming. In theory, GTK CSS does have support for transitions and animations, which could be used in your case. But I'd say it's a hard sell still. That aside I've never tried them in GTK, so I wouldn't know if they even work in practice or how far.
I think you have a shot at this with eww instead. But it's harder to work with and you'll need to make somewhat complex scripts I'd imagine.
NOTE: Waybar has a built-in module for showing temperature, it's just that I couldn't make it work for me and that's why I have a custom module to show CPU temperature. I recommend that you try the built-in one first (since it might work on your machine) for more minimal setup.
Vert guarantees a single file/directory when you extract something with it. If there are more than 1 file in the archive it will nest them in a directory. I have no plans to add any flags or anything to make it extract without nesting either.
UPDATE: Implemented VERT_USE_EXTERNAL_TOOLS environment variable. See #Configuration.
I had passed the filter parameter as "data", which should help prevent most issues with it but yes I agree that it would've been better to use external tools to do the heavy-lifting. I avoided them to make the program cross-platform and easier to setup (you currently can just run a simple pip command to install it). I may introduce them as optional backends later with a warning on the default ones but for now I'm postponing it.
Yesterday I heard of https://quickshell.outfoxxed.me/ but have never tried it myself. They have some pretty decent examples of widgets on their homepage. I think they have their own little langauge called QML which appears to be turing-complete.
Maybe that's what you're missing.