60 lines
1.5 KiB
Nix
60 lines
1.5 KiB
Nix
{ config, lib, ... }:
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with lib;
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let
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netOpts = { name, ... }: {
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options = {
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vlan = mkOption {
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description = "VLAN tag number";
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type = types.int;
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};
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subnet4 = mkOption {
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description = "v.w.x.y/z";
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type = with types; nullOr string;
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default = null;
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};
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subnets6 = mkOption {
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description = "IPv6 subnets w/o prefixlen (always 64)";
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type = with types; attrsOf string;
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default = {};
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};
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};
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};
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in
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{
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options.warnings = mkOption {
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type = types.listOf types.str;
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default = [];
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internal = true;
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};
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options.site = {
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net = mkOption {
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default = {};
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type = with types; attrsOf (submodule netOpts);
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};
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};
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config.warnings =
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let
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findCollisions = getter: xs:
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(builtins.foldl' ({ known, dup }: k:
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let
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ks = builtins.toString k;
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in
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if known ? ${ks}
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then { inherit known; dup = dup ++ [ks]; }
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else { known = known // { ${ks} = true; }; inherit dup; }
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) {
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known = {}; dup = [];
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} (
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concatMap getter (builtins.attrValues xs)
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)).dup;
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reportCollisions = name: getter: xs:
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map (k: "Duplicate ${name}: ${k}") (findCollisions getter xs);
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in
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(reportCollisions "VLAN tag" (x: [x.vlan]) config.site.net) ++
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(reportCollisions "IPv4 subnet" (x: if x.subnet4 == null then [] else [x.subnet4]) config.site.net) ++
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(reportCollisions "IPv6 subnet" (x: builtins.attrValues x.subnets6) config.site.net);
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}
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