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emacs: add overrides option

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This option enables overriding packages within the generated Emacs
package set.

Fixes #486
This commit is contained in:
Robert Helgesson 2018-12-17 23:01:43 +01:00
parent dc72aa2305
commit e68d6e7924
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GPG key ID: 36BDAA14C2797E89
1 changed files with 21 additions and 2 deletions
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23
modules/programs/emacs.nix
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@ -6,8 +6,13 @@ let
cfg = config.programs.emacs;
# Copied from all-packages.nix.
emacsPackages = pkgs.emacsPackagesNgGen cfg.package;
# 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
@ -34,6 +39,20 @@ in
description = "Extra packages available to Emacs.";
};
overrides = mkOption {
default = self: super: {};
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;
internal = true;