From da089cf63a1377fe8febcf1bf6d0d323a0077e02 Mon Sep 17 00:00:00 2001
From: aleksana <me@aleksana.moe>
Date: Mon, 25 Dec 2023 03:09:26 +0800
Subject: [PATCH] nixos/mandoc: fix invalid manpath directory and add cachePath
 option

---
 nixos/modules/misc/mandoc.nix | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/nixos/modules/misc/mandoc.nix b/nixos/modules/misc/mandoc.nix
index 73646a60aabb..797771829a2a 100644
--- a/nixos/modules/misc/mandoc.nix
+++ b/nixos/modules/misc/mandoc.nix
@@ -41,6 +41,27 @@ in
         '';
       };
 
+      cachePath = lib.mkOption {
+        type = with lib.types; listOf str;
+        default = cfg.manPath;
+        defaultText = lib.literalExpression "config.documentation.man.mandoc.manPath";
+        example = lib.literalExpression "[ \"share/man\" \"share/man/fr\" ]";
+        description = ''
+          Change the paths where mandoc {manpage}`makewhatis(8)`generates the
+          manual page index caches. {option}`documentation.man.generateCaches`
+          should be enabled to allow cache generation. This list should only
+          include the paths to manpages installed in the system configuration,
+          i. e. /run/current-system/sw/share/man. {manpage}`makewhatis(8)`
+          creates a database in each directory using the files
+          `mansection/[arch/]title.section` and `catsection/[arch/]title.0`
+          in it. If a directory contains no manual pages, no database is
+          created in that directory.
+          This option only needs to be set manually if extra paths should be
+          indexed or {option}`documentation.man.manPath` contains paths that
+          can't be indexed.
+        '';
+      };
+
       package = lib.mkOption {
         type = lib.types.package;
         default = pkgs.mandoc;
@@ -178,12 +199,7 @@ in
       # 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 ''
-        for man_path in ${
-          lib.concatMapStringsSep " " (path:
-            "$out/" + lib.escapeShellArg path
-            ) cfg.manPath} ${lib.concatMapStringsSep " " (path:
-            lib.escapeShellArg path) cfg.settings.manpath
-          }
+        for man_path in ${lib.concatMapStringsSep " " (path: "$out/" + lib.escapeShellArg path) cfg.cachePath}
         do
           [[ -d "$man_path" ]] && ${makewhatis} -T utf8 $man_path
         done