home-manager/modules/programs/emacs.nix
Jonas Holst Damtoft cf0aad391c
emacs: fix merging of extraPackages and overrides
Because `extraPackages` and `overrides` expect functions as values it
has not been possible to perform merges. This adds suitable types for
these options that allow reasonable merging.
2019-06-10 22:56:47 +02:00

76 lines
1.8 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
hmTypes = import ../lib/types.nix { inherit lib; };
cfg = config.programs.emacs;
# Copied from all-packages.nix, with modifications to support
# overrides.
emacsPackages =
let
epkgs = pkgs.emacsPackagesNgGen cfg.package;
in
epkgs.overrideScope' cfg.overrides;
emacsWithPackages = emacsPackages.emacsWithPackages;
in
{
meta.maintainers = [ maintainers.rycee ];
options = {
programs.emacs = {
enable = mkEnableOption "Emacs";
package = mkOption {
type = types.package;
default = pkgs.emacs;
defaultText = "pkgs.emacs";
example = literalExample "pkgs.emacs25-nox";
description = "The Emacs package to use.";
};
extraPackages = mkOption {
default = self: [];
type = hmTypes.selectorFunction;
defaultText = "epkgs: []";
example = literalExample "epkgs: [ epkgs.emms epkgs.magit ]";
description = "Extra packages available to Emacs.";
};
overrides = mkOption {
default = self: super: {};
type = hmTypes.overlayFunction;
defaultText = "self: super: {}";
example = literalExample ''
self: super: rec {
haskell-mode = self.melpaPackages.haskell-mode;
# ...
};
'';
description = ''
Allows overriding packages within the Emacs package set.
'';
};
finalPackage = mkOption {
type = types.package;
visible = false;
readOnly = true;
description = ''
The Emacs package including any overrides and extra packages.
'';
};
};
};
config = mkIf cfg.enable {
home.packages = [ cfg.finalPackage ];
programs.emacs.finalPackage = emacsWithPackages cfg.extraPackages;
};
}