Changing default terminal in KDE does not work with console app file associations in Dolphin

[donottellmetonottellyou]

Describe the bug

When you change the terminal in the Default Apps section in Plasma System Settings, it doesn't appear to change the terminal correctly for terminal apps like helix. If konsole is not installed, Dolphin will produce an error.

Unfortunately, I can't reproduce the error to show a screenshot, because the fix was to set mimetype defaults and I don't know how to undo what I did. However, an install of KDE with the default terminal unchanged should be sufficient to reproduce this on other computers.

Steps To Reproduce

1. Install KDE using services.desktopManager.plasma6.enable
2. Add helix and kitty to system packages or home manager
3. Set them as the default text editor and terminal emulator (respectively) using the KDE settings manager
4. Remove Konsole like so:

environment.plasma6.excludePackages = with pkgs.kdePackages; [
  konsole
];

5. Try to open a text file in Dolphin

Expected behavior

I believe Dolphin should open the text file without errors in my chosen terminal and terminal editor, and it does with my fix below in additional context.

Screenshots

Additional context

I manually fixed this by running sudo xdg-mime default kitty.desktop application/x-desktop inside the folder where kitty.desktop resides, in my case since I am using home-manager ~/.local/share/applications. I am not sure if this is an upstream issue or not.

Notify maintainers

@K900 @SuperSandro2000 @omentic @stuebinm @Stzx @peterhoeg

Metadata

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.6.56, NixOS, 24.05 (Uakari), 24.05.5744.dc2e0028d274`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.8`
 - channels(root): `"home-manager-24.05.tar.gz, nixos-24.05, nixos-unstable"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

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[K900]

I think this one might be fixed in 6.2.

[donottellmetonottellyou]

Can confirm this is fixed as of KDE 6.2.5, removing Konsole is now possible.

[colgrave34]

I'm runing KDE 6.2.5 and I'm not using home-manager and didn't manually run sudo xdg-mime default kitty.desktop application/x-desktop.
But I fixed it but adding the following to the ~/.config/kdeglobals in the [General] section:

TerminalApplication=alacritty
TerminalService=Alacritty.desktop

Source: https://wiki.archlinux.org/title/Dolphin#Change_the_default_terminal_emulator
I just want to leave it here for reference’s sake.

[donottellmetonottellyou]

Hey, accidentally nuked my .config, and ran into this issue again when I regenerated it. Setting the terminal correctly adds it to kdeglobals, but does not actually change the mime (I assume) so opening files with helix is broken again.

Running the command I used to fix it in the op results in this error:

/run/current-system/sw/bin/xdg-mime: line 863: qtpaths: command not found

I assume it fails to switch terminals because this command is broken. Currently can't find a way to switch it, so I have to run Kitty in the terminal manually and my file manager is useless because I can't launch a terminal at all.

[SuperSandro2000]

qtpaths is part of qtbase.

[donottellmetonottellyou]

qtpaths is part of qtbase.

Running an impure shell with qt6.qtbase does make the command run successfully.

[SuperSandro2000]

#480361