472ca211ca
The apropos software is useful to get a list of manpages matching a
description or to get a list of all manpages. The latter feature is
used by Emacs to get manpage completion (`M-x man`).
To have apropos working, a database of all available manpages must be
built with mandb. This is what this commits does.
A similar change was done for NixOS:
edc6a76cc0
73 lines
2.3 KiB
Nix
73 lines
2.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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{
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options = {
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programs.man = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to enable manual pages and the <command>man</command>
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command. This also includes "man" outputs of all
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<literal>home.packages</literal>.
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'';
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};
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generateCaches = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to generate the manual page index caches using
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<citerefentry>
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<refentrytitle>mandb</refentrytitle>
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<manvolnum>8</manvolnum>
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</citerefentry>. This allows searching for a page or
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keyword using utilities like <citerefentry>
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<refentrytitle>apropos</refentrytitle>
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<manvolnum>1</manvolnum>
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</citerefentry>.
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</para><para>
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This feature is disabled by default because it slows down
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building. If you don't mind waiting a few more seconds when
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Home Manager builds a new generation, you may safely enable
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this option.
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'';
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};
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};
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};
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config = mkIf config.programs.man.enable {
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home.packages = [ pkgs.man ];
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home.extraOutputsToInstall = [ "man" ];
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# This is mostly copy/pasted/adapted from NixOS' documentation.nix.
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home.file = mkIf config.programs.man.generateCaches {
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".manpath".text = let
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# Generate a directory containing installed packages' manpages.
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manualPages = pkgs.buildEnv {
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name = "man-paths";
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paths = config.home.packages;
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pathsToLink = [ "/share/man" ];
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extraOutputsToInstall = [ "man" ];
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ignoreCollisions = true;
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};
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# Generate a database of all manpages in ${manualPages}.
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manualCache = pkgs.runCommandLocal "man-cache" { } ''
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# Generate a temporary man.conf so mandb knows where to
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# write cache files.
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echo "MANDB_MAP ${manualPages}/share/man $out" > man.conf
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# Run mandb to generate cache files:
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${pkgs.man-db}/bin/mandb -C man.conf --no-straycats --create \
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${manualPages}/share/man
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'';
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in ''
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MANDB_MAP ${config.home.profileDirectory}/share/man ${manualCache}
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'';
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};
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};
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}
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