105 lines
3.1 KiB
Nix
105 lines
3.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.programs.emacs;
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# Copied from all-packages.nix, with modifications to support
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# overrides.
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emacsPackages = let epkgs = pkgs.emacsPackagesFor cfg.package;
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in epkgs.overrideScope cfg.overrides;
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emacsWithPackages = emacsPackages.emacsWithPackages;
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extraPackages = epkgs:
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let
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packages = cfg.extraPackages epkgs;
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userConfig = epkgs.trivialBuild {
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pname = "default";
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src = pkgs.writeText "default.el" cfg.extraConfig;
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version = "0.1.0";
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packageRequires = packages;
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};
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in packages ++ optional (cfg.extraConfig != "") userConfig;
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in {
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meta.maintainers = [ maintainers.rycee ];
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options = {
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programs.emacs = {
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enable = mkEnableOption "Emacs";
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package = mkOption {
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type = types.package;
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default = pkgs.emacs;
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defaultText = literalExpression "pkgs.emacs";
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example = literalExpression "pkgs.emacs25-nox";
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description = "The Emacs package to use.";
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};
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# NOTE: The config is placed in default.el instead of ~/.emacs.d so that
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# it won't conflict with Emacs configuration frameworks. Users of these
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# frameworks would still benefit from this option as it would easily allow
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# them to have Nix-computed paths in their configuration.
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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example = ''
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(setq standard-indent 2)
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'';
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description = ''
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Configuration to include in the Emacs default init file. See
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<https://www.gnu.org/software/emacs/manual/html_node/elisp/Init-File.html>
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for more.
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Note, the `inhibit-startup-message` Emacs option
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cannot be set here since Emacs disallows setting it from the default
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initialization file.
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'';
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};
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extraPackages = mkOption {
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default = self: [ ];
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type = hm.types.selectorFunction;
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defaultText = "epkgs: []";
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example = literalExpression "epkgs: [ epkgs.emms epkgs.magit ]";
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description = ''
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Extra packages available to Emacs. To get a list of
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available packages run:
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{command}`nix-env -f '<nixpkgs>' -qaP -A emacsPackages`.
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'';
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};
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overrides = mkOption {
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default = self: super: { };
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type = hm.types.overlayFunction;
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defaultText = "self: super: {}";
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example = literalExpression ''
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self: super: rec {
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haskell-mode = self.melpaPackages.haskell-mode;
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# ...
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};
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'';
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description = ''
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Allows overriding packages within the Emacs package set.
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'';
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};
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finalPackage = mkOption {
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type = types.package;
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visible = false;
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readOnly = true;
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description = ''
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The Emacs package including any overrides and extra packages.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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home.packages = [ cfg.finalPackage ];
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programs.emacs.finalPackage = emacsWithPackages extraPackages;
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};
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}
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