# Fg42 - Emacs Editor for advance users
#
# Copyright (c) 2010-2024 Sameer Rahmani <lxsameer@gnu.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

{ pkgs, lib, elispDepsFile }:
with builtins;
let
  reader = import ./elisp_reader.nix { inherit lib; };
  elispAst = reader.fromElisp (builtins.readFile elispDepsFile);
  dependsOnForm = filter (x: head x == "depends-on") elispAst;
  elispPkgs = if length dependsOnForm == 0
              then throw "Can't find the form 'depends-on' on 'deps.el'"
              else tail (head dependsOnForm);
in elispPkgs