clan-core/clanModules/static-hosts/default.nix

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{ lib, config, ... }:
{
options.clan.static-hosts = {
excludeHosts = lib.mkOption {
type = lib.types.listOf lib.types.str;
default = [ config.clanCore.machineName ];
description = "Hosts that should be excluded";
};
topLevelDomain = lib.mkOption {
type = lib.types.str;
default = "";
description = "Top level domain to reach hosts";
};
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};
config.networking.hosts =
let
clanDir = config.clanCore.clanDir;
machineDir = clanDir + "/machines/";
zerotierIpMachinePath = machines: machineDir + machines + "/facts/zerotier-ip";
machines = builtins.readDir machineDir;
filteredMachines = lib.filterAttrs (
name: _: !(lib.elem name config.clan.static-hosts.excludeHosts)
) machines;
in
lib.filterAttrs (_: value: value != null) (
lib.mapAttrs' (
machine: _:
let
path = zerotierIpMachinePath machine;
in
if builtins.pathExists path then
lib.nameValuePair (builtins.readFile path) (
if (config.clan.static-hosts.topLevelDomain == "") then
[ machine ]
else
[ "${machine}.${config.clan.static-hosts.topLevelDomain}" ]
)
else
null
) filteredMachines
);
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}