From b0880d573677e0f32562a40d127910ec6a1d3ae2 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sun, 16 Aug 2020 11:28:27 +0200
Subject: krebs.dns: allow disabling search-domain

---
 krebs/3modules/default.nix | 11 +++++++----
 krebs/3modules/dns.nix     |  2 +-
 krebs/3modules/hosts.nix   |  6 +++++-
 3 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index f3180722..ccc3a44b 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -152,9 +152,11 @@ let
                     let
                       longs = net.aliases;
                       shorts =
-                        map (removeSuffix ".${cfg.dns.search-domain}")
-                            (filter (hasSuffix ".${cfg.dns.search-domain}")
-                                    longs);
+                        optionals
+                          (cfg.dns.search-domain != null)
+                          (map (removeSuffix ".${cfg.dns.search-domain}")
+                               (filter (hasSuffix ".${cfg.dns.search-domain}")
+                                       longs));
                       add-port = a:
                         if net.ssh.port != 22
                           then "[${a}]:${toString net.ssh.port}"
@@ -177,7 +179,8 @@ let
           (concatMap (host: attrValues host.nets)
             (mapAttrsToList
               (_: host: recursiveUpdate host
-                (optionalAttrs (hasAttr cfg.dns.search-domain host.nets) {
+                (optionalAttrs (cfg.dns.search-domain != null &&
+                                hasAttr cfg.dns.search-domain host.nets) {
                   nets."" = host.nets.${cfg.dns.search-domain} // {
                     aliases = [host.name];
                     addrs = [];
diff --git a/krebs/3modules/dns.nix b/krebs/3modules/dns.nix
index b7e2a2cb..8acc4ccd 100644
--- a/krebs/3modules/dns.nix
+++ b/krebs/3modules/dns.nix
@@ -6,7 +6,7 @@ with import <stockholm/lib>;
     };
 
     krebs.dns.search-domain = mkOption {
-      type = types.hostname;
+      type = types.nullOr types.hostname;
     };
   };
 }
diff --git a/krebs/3modules/hosts.nix b/krebs/3modules/hosts.nix
index 7fe01a76..159b54e3 100644
--- a/krebs/3modules/hosts.nix
+++ b/krebs/3modules/hosts.nix
@@ -24,7 +24,11 @@ in {
                   aliases = longs ++ shorts;
                   longs = filter check net.aliases;
                   shorts = let s = ".${config.krebs.dns.search-domain}"; in
-                    map (removeSuffix s) (filter (hasSuffix s) longs);
+                    optionals
+                      (config.krebs.dns.search-domain != null)
+                      (map (removeSuffix s)
+                           (filter (hasSuffix s)
+                                   longs));
                 in
                   map (addr: { ${addr} = aliases; }) net.addrs)
                 (attrValues host.nets))
-- 
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