Waybar here i come (#58)

home/system/termfilechooser/default.nix

@@ -0,0 +1,65 @@
+# Use elio as the file picker for portal dialogs (browser "select file(s)" and
+# "save download to..."). The backend is xdg-desktop-portal-termfilechooser,
+# enabled system-wide in nixos/utils.nix (extraPortals + FileChooser routing).
+{
+  config,
+  pkgs,
+  ...
+}: let
+  wrapper = pkgs.writeShellScript "elio-wrapper" ''
+    multiple="$1"
+    directory="$2"
+    save="$3"
+    path="$4"
+    out="$5"
+    debug="$6"
+
+    set -e
+
+    if [[ "$debug" = 1 ]]; then
+      set -x
+    fi
+
+    cmd="elio"
+    termcmd="''${TERMCMD:-ghostty --gtk-single-instance=false --title=termfilechooser -e}"
+
+    if [[ "$save" = "1" ]]; then
+      set -- --chooser-file="$out" "$path"
+    elif [[ "$directory" = "1" ]]; then
+      set -- --chooser-file="$out" --cwd-file="$out.1" "$path"
+    else
+      set -- --chooser-file="$out" "$path"
+    fi
+
+    command="$termcmd $cmd"
+    for arg in "$@"; do
+      escaped=$(printf "%s" "$arg" | sed 's/"/\\"/g')
+      command="$command \"$escaped\""
+    done
+
+    sh -c "$command"
+
+    if [[ "$directory" = "1" ]]; then
+      if [[ ! -s "$out" ]] && [[ -s "$out.1" ]]; then
+        cat "$out.1" > "$out"
+        rm "$out.1"
+      else
+        rm "$out.1"
+      fi
+    fi
+  '';
+  # ghostty must run in the foreground instead of handing off to the
+  # single-instance daemon, otherwise the wrapper returns before you've picked
+  # anything and the portal reads an empty selection.
+  termcmd = "ghostty --gtk-single-instance=false --title=termfilechooser -e";
+in {
+  xdg.configFile."xdg-desktop-portal-termfilechooser/config".text = ''
+    [filechooser]
+    cmd=${wrapper}
+    default_dir=$HOME
+    open_mode=suggested
+    save_mode=suggested
+    env=TERMCMD=${termcmd}
+        PATH=${config.home.profileDirectory}/bin:/run/current-system/sw/bin:/run/wrappers/bin
+  '';
+}