Default applications: Difference between revisions
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Added information about how a user can find out what mime type a file is, and changed the other shell code to a syntaxhighlight block |
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</syntaxhighlight>In case a program is missing a .desktop-file, the following example adds a <code>librewolf.desktop</code> file to the MIME database with the specific binary path.<syntaxhighlight lang="nix"> | </syntaxhighlight> | ||
To list all .desktop-files, run | |||
<syntaxhighlight lang="nix"> | |||
ls /run/current-system/sw/share/applications # for global packages | |||
ls /etc/profiles/per-user/$(id -n -u)/share/applications # for user packages | |||
ls ~/.nix-profile/share/applications # for home-manager packages | |||
</syntaxhighlight> | |||
In case a program is missing a .desktop-file, the following example adds a <code>librewolf.desktop</code> file to the MIME database with the specific binary path.<syntaxhighlight lang="nix"> | |||
home-manager.users.myuser = { | home-manager.users.myuser = { | ||
xdg.desktopEntries.librewolf = { | xdg.desktopEntries.librewolf = { | ||
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}; | }; | ||
}; | }; | ||
</syntaxhighlight> | |||
If you don't know the exact mime type of a file, you can use the <code>file</code> command. | |||
<syntaxhighlight lang="shell"> | |||
file --mime-type -b $file_name | |||
</syntaxhighlight> | </syntaxhighlight> | ||
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xdg-open "https://nixos.org" | xdg-open "https://nixos.org" | ||
</syntaxhighlight> | </syntaxhighlight> | ||
[[Category:Home Manager]] | |||
Latest revision as of 10:39, 6 August 2025
Different programs manage default application associations in unique ways. Command-line applications often use environment variables, whereas graphical applications typically utilize XDG MIME applications via APIs like GIO or Qt, or by calling xdg-open.
Configuration
Using Home Manager, this configuration example configures the handling of HTML-files and URLs by opening them with the browser LibreWolf. Replace myuser with the name of your low-level user.
home-manager.users.myuser = {
xdg.mimeApps = {
enable = true;
defaultApplications = {
"text/html" = "librewolf.desktop";
"x-scheme-handler/http" = "librewolf.desktop";
"x-scheme-handler/https" = "librewolf.desktop";
"x-scheme-handler/about" = "librewolf.desktop";
"x-scheme-handler/unknown" = "librewolf.desktop";
};
};
};
To list all .desktop-files, run
ls /run/current-system/sw/share/applications # for global packages
ls /etc/profiles/per-user/$(id -n -u)/share/applications # for user packages
ls ~/.nix-profile/share/applications # for home-manager packages
In case a program is missing a .desktop-file, the following example adds a librewolf.desktop file to the MIME database with the specific binary path.
home-manager.users.myuser = {
xdg.desktopEntries.librewolf = {
name = "LibreWolf";
exec = "${pkgs.librewolf}/bin/librewolf";
};
};
If you don't know the exact mime type of a file, you can use the file command.
file --mime-type -b $file_name
Usage
Try opening a web page with xdg-open which is part of the package xdg-utils
xdg-open "https://nixos.org"