nixos-config/lib/builders.nix

{ pkgs, lib, self }:

{
  /* Create an XDG MIME Association listing. This should also take care of
     generating desktop-specific mimeapps.list if `desktopName` is given. The
     given desktop name is already assumed to be in suitable casing which is
     typically in lowercase ASCII.
  */
  makeXDGMimeAssociationList = {
    desktopName ? "",
    addedAssociations ? { },
    removedAssociations ? { },
    defaultApplications ? { },
  }:
    pkgs.writeTextFile {
      name = "xdg-mime-associations";
      text =
        # Non-desktop-specific mimeapps.list are only allowed to specify
        # default applications.
        lib.generators.toINI { } ({
          "Default Applications" = defaultApplications;
        } // (lib.optionalAttrs (desktopName == "") {
          "Added Associations" = addedAssociations;
          "Removed Associations" = removedAssociations;
        }));
      destination = "/share/applications/${lib.optionalString (desktopName != "") "${desktopName}-"}mimeapps.list";
    };

  /* Create an XDG Portals configuration with the given desktop name and its
     configuration. Similarly, the given desktop name is assumed to be already
     in its suitable form of a lowercase ASCII.
  */
  makeXDGPortalConfiguration = {
    desktopName ? "common",
    config,
  }:
    pkgs.writeTextFile {
      name = "xdg-portal-config-${desktopName}";
      text = lib.generators.toINI { } config;
      destination = "/share/xdg-desktop-portal/${lib.optionalString (desktopName != "common") "${desktopName}-"}portals.conf";
    };
}