home-manager/modules/programs/man.nix

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{ config, lib, pkgs, ... }:
with lib;
{
options = {
programs.man = {
enable = mkOption {
type = types.bool;
default = true;
description = ''
Whether to enable manual pages and the <command>man</command>
command. This also includes "man" outputs of all
<literal>home.packages</literal>.
'';
};
generateCaches = mkOption {
type = types.bool;
default = false;
description = ''
Whether to generate the manual page index caches using
<citerefentry>
<refentrytitle>mandb</refentrytitle>
<manvolnum>8</manvolnum>
</citerefentry>. This allows searching for a page or
keyword using utilities like <citerefentry>
<refentrytitle>apropos</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>.
</para><para>
This feature is disabled by default because it slows down
building. If you don't mind waiting a few more seconds when
Home Manager builds a new generation, you may safely enable
this option.
'';
};
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};
};
config = mkIf config.programs.man.enable {
home.packages = [ pkgs.man ];
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home.extraOutputsToInstall = [ "man" ];
# This is mostly copy/pasted/adapted from NixOS' documentation.nix.
home.file = mkIf config.programs.man.generateCaches {
".manpath".text = let
# Generate a directory containing installed packages' manpages.
manualPages = pkgs.buildEnv {
name = "man-paths";
paths = config.home.packages;
pathsToLink = [ "/share/man" ];
extraOutputsToInstall = [ "man" ];
ignoreCollisions = true;
};
# Generate a database of all manpages in ${manualPages}.
manualCache = pkgs.runCommandLocal "man-cache" { } ''
# Generate a temporary man.conf so mandb knows where to
# write cache files.
echo "MANDB_MAP ${manualPages}/share/man $out" > man.conf
# Run mandb to generate cache files:
${pkgs.man-db}/bin/mandb -C man.conf --no-straycats --create \
${manualPages}/share/man
'';
in ''
MANDB_MAP ${config.home.profileDirectory}/share/man ${manualCache}
'';
};
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};
}