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nixpkgs/nixos/modules/misc/mandoc.nix
2021-12-31 11:17:34 +01:00

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Nix

{ config, lib, pkgs, ... }:
let
makewhatis = "${lib.getBin cfg.package}/bin/makewhatis";
cfg = config.documentation.man.mandoc;
in {
meta.maintainers = [ lib.maintainers.sternenseemann ];
options = {
documentation.man.mandoc = {
enable = lib.mkEnableOption "mandoc as the default man page viewer";
manPath = lib.mkOption {
type = with lib.types; listOf str;
default = [ "share/man" ];
example = lib.literalExpression "[ \"share/man\" \"share/man/fr\" ]";
description = ''
Change the manpath, i. e. the directories where
<citerefentry><refentrytitle>man</refentrytitle><manvolnum>1</manvolnum></citerefentry>
looks for section-specific directories of man pages.
You only need to change this setting if you want extra man pages
(e. g. in non-english languages). All values must be strings that
are a valid path from the target prefix (without including it).
The first value given takes priority.
'';
};
package = lib.mkOption {
type = lib.types.package;
default = pkgs.mandoc;
defaultText = lib.literalExpression "pkgs.mandoc";
description = ''
The <literal>mandoc</literal> derivation to use. Useful to override
configuration options used for the package.
'';
};
};
};
config = lib.mkIf cfg.enable {
environment = {
systemPackages = [ cfg.package ];
# tell mandoc about man pages
etc."man.conf".text = lib.concatMapStrings (path: ''
manpath /run/current-system/sw/${path}
'') cfg.manPath;
# create mandoc.db for whatis(1), apropos(1) and man(1) -k
# TODO(@sternenseemman): fix symlinked directories not getting indexed,
# see: https://inbox.vuxu.org/mandoc-tech/20210906171231.GF83680@athene.usta.de/T/#e85f773c1781e3fef85562b2794f9cad7b2909a3c
extraSetup = lib.mkIf config.documentation.man.generateCaches ''
${makewhatis} -T utf8 ${
lib.concatMapStringsSep " " (path: "\"$out/${path}\"") cfg.manPath
}
'';
};
};
}