zoom-us: allow to select xdg-desktop-portal packages

To reduce the closure size of the zoom-us package,
this commit replaces the `xdgDesktopPortalSupport`
option with several new options that permit to (de-)select
several XDG desktop portal packages to be used by `zoom-us`.
Furthermore, two new options permit to inject further packages
(e.g. individual XDG desktop portal packages) into the virtual
filesystem that will be prepared by bubblewrap for zoom-us:

* `targetPkgs` is a *function* that maps the `pkgs`
  packages attrset to a list of packages.
* `targetPkgsFixed` is a simple list of packages.

`targetPkgs` should be preferred before
`targetPkgsFixed` if possible, as the `buildFHSEnv`
mechanism expects a function as explained above:
It needs to extract a list of dependency
packages for a `pkgs` package attrset.
Package injection likely also works if `targetPkgsFixed`
is used, but that creates a liability
in that changes of the `buildFHSEnv` implementation might
(at least more likely) break zoom-us in unexpected ways.

Note: This now *disables* all
XDG desktop portal packages by default.

Co-authored-by: Philip Taron <philip.taron@gmail.com>

pkgs/by-name/zo/zoom-us/package.nix

@@ -5,10 +5,51 @@
   makeWrapper,
   xar,
   cpio,
-  pulseaudioSupport ? true,
-  xdgDesktopPortalSupport ? true,
   callPackage,
   buildFHSEnv,
+
+  # Support pulseaudio by default
+  pulseaudioSupport ? true,
+
+  # Whether to support XDG portals at all
+  xdgDesktopPortalSupport ? (
+    plasma6XdgDesktopPortalSupport
+    || plasma5XdgDesktopPortalSupport
+    || lxqtXdgDesktopPortalSupport
+    || gnomeXdgDesktopPortalSupport
+    || hyprlandXdgDesktopPortalSupport
+    || wlrXdgDesktopPortalSupport
+    || xappXdgDesktopPortalSupport
+  ),
+
+  # This is Plasma 6 (KDE) XDG portal support
+  plasma6XdgDesktopPortalSupport ? false,
+
+  # This is Plasma 5 (KDE) XDG portal support
+  plasma5XdgDesktopPortalSupport ? false,
+
+  # This is LXQT XDG portal support
+  lxqtXdgDesktopPortalSupport ? false,
+
+  # This is GNOME XDG portal support
+  gnomeXdgDesktopPortalSupport ? false,
+
+  # This is Hyprland XDG portal support
+  hyprlandXdgDesktopPortalSupport ? false,
+
+  # This is `wlroots` XDG portal support
+  wlrXdgDesktopPortalSupport ? false,
+
+  # This is Xapp XDG portal support, used for GTK and various Cinnamon/MATE/Xfce4 infrastructure.
+  xappXdgDesktopPortalSupport ? false,
+
+  # This function can be overridden to add in extra packages
+  targetPkgs ? pkgs: [ ],
+
+  # This list can be overridden to add in extra packages
+  # that are independent of the underlying package attrset
+  targetPkgsFixed ? [ ],
+
 }:
 
 let
@@ -179,17 +220,19 @@ let
       pkgs.libpulseaudio
       pkgs.pulseaudio
     ]
-    ++ lib.optionals xdgDesktopPortalSupport [
+    ++ lib.optional xdgDesktopPortalSupport pkgs.xdg-desktop-portal
-      pkgs.kdePackages.xdg-desktop-portal-kde
+    ++ lib.optional plasma6XdgDesktopPortalSupport pkgs.kdePackages.xdg-desktop-portal-kde
-      pkgs.lxqt.xdg-desktop-portal-lxqt
+    ++ lib.optional plasma5XdgDesktopPortalSupport pkgs.plasma5Packages.xdg-desktop-portal-kde
-      pkgs.plasma5Packages.xdg-desktop-portal-kde
+    ++ lib.optional lxqtXdgDesktopPortalSupport pkgs.lxqt.xdg-desktop-portal-lxqt
-      pkgs.xdg-desktop-portal
+    ++ lib.optionals gnomeXdgDesktopPortalSupport [
       pkgs.xdg-desktop-portal-gnome
       pkgs.xdg-desktop-portal-gtk
-      pkgs.xdg-desktop-portal-hyprland
+    ]
-      pkgs.xdg-desktop-portal-wlr
+    ++ lib.optional hyprlandXdgDesktopPortalSupport pkgs.xdg-desktop-portal-hyprland
-      pkgs.xdg-desktop-portal-xapp
+    ++ lib.optional wlrXdgDesktopPortalSupport pkgs.xdg-desktop-portal-wlr
-    ];
+    ++ lib.optional xappXdgDesktopPortalSupport pkgs.xdg-desktop-portal-xapp
+    ++ targetPkgs pkgs
+    ++ targetPkgsFixed;
 
   # We add the `unpacked` zoom archive to the FHS env
   # and also bind-mount its `/opt` directory.