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home-manager/modules/misc/xdg-portal.nix

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2023-11-27 20:14:31 +01:00
{ config, pkgs, lib, ... }:
let
inherit (lib)
mapAttrsToList mkEnableOption mkIf mkMerge mkOption optional optionalString
types;
associationOptions = with types;
attrsOf (coercedTo (either (listOf str) str)
(x: lib.concatStringsSep ";" (lib.toList x)) str);
in {
meta.maintainers = [ lib.maintainers.misterio77 ];
options.xdg.portal = {
enable = mkEnableOption
"[XDG desktop integration](https://github.com/flatpak/xdg-desktop-portal)";
extraPortals = mkOption {
type = types.listOf types.package;
default = [ ];
description = ''
List of additional portals that should be passed to the
`xdg-desktop-portal.service`, via the `XDG_DESKTOP_PORTAL_DIR`
variable.
Portals allow interaction with system, like choosing files or taking
screenshots. At minimum, a desktop portal implementation should be
listed.
'';
};
xdgOpenUsePortal = mkOption {
type = types.bool;
default = false;
description = ''
Sets environment variable `NIXOS_XDG_OPEN_USE_PORTAL` to `1`
This will make `xdg-open` use the portal to open programs, which resolves bugs involving
programs opening inside FHS envs or with unexpected env vars set from wrappers.
See [#160923](https://github.com/NixOS/nixpkgs/issues/160923) for more info.
'';
};
config = mkOption {
type = types.attrsOf associationOptions;
default = { };
example = {
x-cinnamon = { default = [ "xapp" "gtk" ]; };
pantheon = {
default = [ "pantheon" "gtk" ];
"org.freedesktop.impl.portal.Secret" = [ "gnome-keyring" ];
};
common = { default = [ "gtk" ]; };
};
description = ''
Sets which portal backend should be used to provide the implementation
for the requested interface. For details check {manpage}`portals.conf(5)`.
These will be written with the name `$desktop-portals.conf` for
`xdg.portal.config.$desktop` and `portals.conf` for
`xdg.portal.config.common` as an exception.
These, together with `xdg.portal.configPackages`, will be joined into a
directory and passed to `xdg-desktop-portal.service` through a
`NIXOS_XDG_DESKTOP_PORTAL_CONFIG_DIR` variable.
'';
};
configPackages = mkOption {
type = types.listOf types.package;
default = [ ];
example = lib.literalExpression "[ pkgs.gnome.gnome-session ]";
description = ''
List of packages that provide XDG desktop portal configuration, usually in
the form of `share/xdg-desktop-portal/$desktop-portals.conf`.
Note that configs in `xdg.portal.config` will be preferred if set.
'';
};
};
config = let
cfg = config.xdg.portal;
joinedPortals = pkgs.buildEnv {
name = "xdg-portals";
paths = cfg.extraPortals;
pathsToLink =
[ "/share/xdg-desktop-portal/portals" "/share/applications" ];
};
portalConfigPath = n:
"share/xdg-desktop-portal/${
optionalString (n != "common") "${n}-"
}portals.conf";
mkPortalConfig = desktop: conf:
pkgs.writeTextDir (portalConfigPath desktop)
(lib.generators.toINI { } { preferred = conf; });
joinedPortalConfigs = pkgs.buildEnv {
name = "xdg-portal-configs";
ignoreCollisions = true; # Let config override configPackages cfgs
paths = (mapAttrsToList mkPortalConfig cfg.config) ++ cfg.configPackages;
pathsToLink = [ "/share/xdg-desktop-portal" ];
};
in mkIf cfg.enable {
warnings = optional (cfg.configPackages == [ ] && cfg.config == { }) ''
xdg-desktop-portal 1.17 reworked how portal implementations are loaded, you
should either set `xdg.portal.config` or `xdg.portal.configPackages`
to specify which portal backend to use for the requested interface.
https://github.com/flatpak/xdg-desktop-portal/blob/1.18.1/doc/portals.conf.rst.in
If you simply want to keep the behaviour in < 1.17, which uses the first
portal implementation found in lexicographical order, use the following:
xdg.portal.config.common.default = "*";
'';
assertions = [
(lib.hm.assertions.assertPlatform "xdg.portal" pkgs lib.platforms.linux)
{
assertion = cfg.extraPortals != [ ];
message =
"Setting xdg.portal.enable to true requires a portal implementation in xdg.portal.extraPortals such as xdg-desktop-portal-gtk or xdg-desktop-portal-kde.";
}
];
home = {
sessionVariables =
mkIf cfg.xdgOpenUsePortal { NIXOS_XDG_OPEN_USE_PORTAL = "1"; };
# Make extraPortals systemd units available to the user
packages = [ pkgs.xdg-desktop-portal ] ++ cfg.extraPortals;
};
systemd.user.services.xdg-desktop-portal = {
Unit = {
Description = "Portal service";
PartOf = "graphical-session.target";
};
Service = {
Environment = [
"XDG_DESKTOP_PORTAL_DIR=${joinedPortals}/share/xdg-desktop-portal/portals"
] ++ (optional (cfg.configPackages != [ ])
"NIXOS_XDG_DESKTOP_PORTAL_CONFIG_DIR=${joinedPortalConfigs}/share/xdg-desktop-portal");
Type = "dbus";
BusName = "org.freedesktop.portal.Desktop";
ExecStart = "${pkgs.xdg-desktop-portal}/libexec/xdg-desktop-portal";
Slice = "session.slice";
};
};
};
}