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/*
Parse an emacs package file to derive packages from
Package-Requires declarations.
*/
{ pkgs }:
let
parse = pkgs.callPackage ./parse.nix { };
in
{ packageElisp
, extraEmacsPackages ? epkgs: [ ]
, package ? pkgs.emacs
, override ? (self: super: { })
}:
let
packages = parse.parsePackagesFromPackageRequires packageElisp;
emacsPackages = (pkgs.emacsPackagesFor package).overrideScope' (self: super:
# for backward compatibility: override was a function with one parameter
if builtins.isFunction (override super)
then override self super
else override super
);
emacsWithPackages = emacsPackages.emacsWithPackages;
in
emacsWithPackages (epkgs:
let
usePkgs = builtins.map (name: epkgs.${name}) packages;
extraPkgs = extraEmacsPackages epkgs;
in
[ epkgs.use-package ] ++ usePkgs ++ extraPkgs)
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