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Centralize shared values into variables.nix

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One file (variables.nix) holding every value that was previously
hardcoded and repeated across modules: LAN domain/CIDR, home/tailnet
domains, cross-host references (nix-cache substituter hostname, NFS
server hostname, remote-builder user), PXE/PBS IPs, timezone, and the
primary username.

Wired in via flake.nix's specialArgs (and home-manager's
extraSpecialArgs for the two home.nix files), so any module picks it
up by just adding `vars` to its function arguments — no explicit
import needed. Two hosts (nix-cache, server) now derive their own
networking.hostName from the same variable other hosts use to reach
them, so there's exactly one place to change either identifier.

Purely mechanical: every substituted value matches what was already
there, confirmed by identical toplevel .drv paths for all 17 targets
before and after.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
beatzaplenty
2026-07-19 14:51:37 +10:00
co-authored by Claude Sonnet 5
parent 2f7831aea8
commit 6dcbae5659
20 changed files with 219 additions and 191 deletions
Download Patch File Download Diff File Expand all files Collapse all files
modules/build-types/pxe-boot.nix
+2 -2
View File
@@ -1,10 +1,10 @@
{ config, lib, pkgs, inputs, ... }:
{ config, lib, pkgs, inputs, vars, ... }:
let
pxeRoot = "/srv/pxe";
httpRoot = "${pxeRoot}/http";
tftpRoot = "${pxeRoot}/tftp";
pxeBaseUrl = "http://192.168.2.247";
pxeBaseUrl = "http://${vars.pxeServerIp}";
bootIpxe = pkgs.writeText "boot.ipxe" ''
#!ipxe
modules/build-types/server.nix
+7 -7
View File
@@ -1,4 +1,4 @@
{ ... }:
{ vars, lib, ... }:
{
imports = [
@@ -6,7 +6,7 @@
../services/zfs/enable-service.nix
];
boot.zfs.extraPools = [ "tank" ];
boot.zfs.extraPools = [ (lib.removePrefix "/" vars.storageRoot) ];
systemd.services.nfs-server = {
after = [ "zfs-mount.service" ];
@@ -16,11 +16,11 @@
services.nfs.server = {
enable = true;
exports = ''
/tank/docker/config 192.168.2.0/24(rw,sync,no_subtree_check,no_root_squash)
/tank/docker/volumes 192.168.2.0/24(rw,sync,no_subtree_check,no_root_squash)
/tank/docker/databases 192.168.2.0/24(rw,sync,no_subtree_check,no_root_squash)
/tank/docker/nextcloud-data 192.168.2.0/24(rw,sync,no_subtree_check,no_root_squash)
/tank/raspi/volumes 192.168.2.0/24(rw,sync,no_subtree_check,no_root_squash)
${vars.storageRoot}/docker/config ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
${vars.storageRoot}/docker/volumes ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
${vars.storageRoot}/docker/databases ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
${vars.storageRoot}/docker/nextcloud-data ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
${vars.storageRoot}/raspi/volumes ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
'';
};