Add dynamic theming for gum

[severin-richner]

Summary

This adds dynamic theming for gum by using the colors from the current theme.

Why

The gum cli tool is used quite extensively in omarchy scripts and it's default pink theme can look quite out of place.

Remark

I don't like how this requires to add a lot of different environment variables. Sadly it doesn't seem like gum provides a "global theme" setting, so this might still be the best option.

To avoid having all those variables in the environment, we could add a bash function which shadows gum and adds the variables just for this scope.

Examples

first image is before, second is after

Catppuccin: Install > Web App

Catppuccin Latte: Remove > TUI

Matte Black: Update > Omarchy

Rose Pine: Install > Web App

[dhh]

Can you show some images of where this improves things? The gum styling we have now is already derived from the terminal colors that are theme dependent.

[severin-richner]

Can you show some images of where this improves things? The gum styling we have now is already derived from the terminal colors that are theme dependent.

Added some example screenshots.

[dhh]

That's a clear improvement. Just a few notes and we can merge this 👌

[dhh]

I like the simplicity of this, but then it would only apply to new terminals opened. Not existing ones, right?

[severin-richner]

Yes, I just realized that then the theming also only applies to user bash shells, so scripts like omarchy-menu which don't source the ~/.bashrc file don't set the environment variables. (If they are started using a keyboard shortcut.)

I think setting the variables via hyprland might be the easiest approach?

[dhh]

Yes, fine to set via hyprland. Then we actually get reloading for free. You shouldn't even have to call hyprctl reload.

[severin-richner]

Great, in this case I just reverted the last commit and keep it in the default/themed/hyprland.conf.tpl (since adding something like a default/themed/gum.env.conf.tpl, which then also gets added as a config to hyprland will probably just we more confusing than helpful).

[dhh]

I prefer having this in a separate file. Hyprland doesn't have a problem with includes. So we should use use gum.env.conf and then link those from the default hyprland config inside omarchy.

[severin-richner]

I now added a separate gum.env.conf.tpl file for this.

[dhh]

We are no longer restarting.

[severin-richner]

Updated the migration script to also add the new gum.env.conf to the user's hyprland.conf.

Migration script just runs omarchy-theme-restart. The gum.env.conf file gets sourced in the default/hypr/envs.conf file.