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# Configuration for the Name Service Switch (/etc/nsswitch.conf).
{config, pkgs, ...}:
let
options = {
# NSS modules. Hacky!
system.nssModules = pkgs.lib.mkOption {
internal = true;
default = [];
description = "
Search path for NSS (Name Service Switch) modules. This allows
several DNS resolution methods to be specified via
<filename>/etc/nsswitch.conf</filename>.
";
merge = pkgs.lib.mergeListOption;
apply = list:
let
list2 =
list
# !!! this should be in the LDAP module
++ pkgs.lib.optional config.users.ldap.enable pkgs.nss_ldap;
in {
list = list2;
path = pkgs.lib.makeLibraryPath list2;
};
};
};
in
{
require = [options];
environment.etc =
[ # Name Service Switch configuration file. Required by the C library.
# !!! Factor out the mdns stuff. The avahi module should define
# an option used by this module.
{ source =
if config.services.avahi.nssmdns
then ./nsswitch-mdns.conf
else ./nsswitch.conf;
target = "nsswitch.conf";
}
];
environment.shellInit =
if config.system.nssModules.path != "" then
''
LD_LIBRARY_PATH=${config.system.nssModules.path}:$LD_LIBRARY_PATH
''
else "";
# NSS modules need to be in `systemPath' so that (i) the builder
# chroot gets to seem them, and (ii) applications can benefit from
# changes in the list of NSS modules at run-time, without requiring
# a reboot.
environment.systemPackages = [config.system.nssModules.list];
}