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nixpkgs/nixos/modules/config/nsswitch.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

64 lines
1.7 KiB
Nix

# Configuration for the Name Service Switch (/etc/nsswitch.conf).
{ config, lib, pkgs, ... }:
with lib;
let
inherit (config.services.avahi) nssmdns;
inherit (config.services.samba) nsswins;
in
{
options = {
# NSS modules. Hacky!
system.nssModules = mkOption {
type = types.listOf types.path;
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>.
'';
apply = list:
{
inherit list;
path = makeLibraryPath list;
};
};
};
config = {
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 = pkgs.writeText "nsswitch.conf"
''
passwd: files ldap
group: files ldap
shadow: files ldap
hosts: files ${optionalString nssmdns "mdns_minimal [NOTFOUND=return]"} dns ${optionalString nssmdns "mdns"} ${optionalString nsswins "wins"} myhostname
networks: files dns
ethers: files
services: files
protocols: files
'';
target = "nsswitch.conf";
}
];
# Use nss-myhostname to ensure that our hostname always resolves to
# a valid IP address. It returns all locally configured IP
# addresses, or ::1 and 127.0.0.2 as fallbacks.
system.nssModules = [ pkgs.systemd ];
};
}