clanModules/flake-module.nix

@@ -14,6 +14,7 @@
     root-password = ./root-password;
     sshd = ./sshd;
     sunshine = ./sunshine;
+    static-hosts = ./static-hosts;
     syncthing = ./syncthing;
     thelounge = ./thelounge;
     user-password = ./root-password;

clanModules/static-hosts/README.md

@@ -0,0 +1,2 @@
+Statically configure the host names of machines based on their respective zerotier-ip.
+---

clanModules/static-hosts/default.nix

@@ -0,0 +1,24 @@
+{ 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";
+    };
+  };
+
+  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.mapAttrs' (
+      machine: _: lib.nameValuePair (builtins.readFile (zerotierIpMachinePath machine)) [ machine ]
+    ) filteredMachines);
+}

docs/mkdocs.yml

@@ -62,6 +62,7 @@ nav:
           - reference/clanModules/sshd.md
           - reference/clanModules/sunshine.md
           - reference/clanModules/syncthing.md
+          - reference/clanModules/static-hosts.md
           - reference/clanModules/thelounge.md
           - reference/clanModules/user-password.md
           - reference/clanModules/xfce.md