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69 lines
2.6 KiB
Nix
69 lines
2.6 KiB
Nix
let
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# Sources are from niv.
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sources = import ./nix/sources.nix;
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# We pass sources through to pkgs and get our nixpkgs + overlays.
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pkgs = import ./pkgs { inherit sources; };
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# We want our overlaid lib.
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inherit (pkgs) lib;
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# This is used for caching niv sources in CI.
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sourceCache = import ./cache.nix { inherit sources lib; };
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/*
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This is used to generate specialArgs + the like. It works as such:
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* A <argGenName> can exist at config/<argGenName>.
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* A <argGenName> can exist at config/trusted/<argGenName>.
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If only one exists, the path for that one is returned.
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Otherwise a module is generated which contains both import paths.
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*/
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argGenNames = [ "profiles" "users" "targets" "services" ];
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argGen = lib.mapListToAttrs (folder: lib.nameValuePair folder (lib.domainMerge { inherit folder; })) argGenNames;
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/*
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This produces an attrSet of hosts based upon:
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* hosts being located within config/hosts/<hostname>
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* hosts having an entrypoint of meta.nix
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*/
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hosts = lib.domainMerge {
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folder = "hosts";
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defaultFile = "meta.nix";
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};
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/*
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We use this to make the meta runner use this file and to use `--show-trace` on nix-builds.
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We also pass through pkgs to meta this way.
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*/
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metaConfig = import ./meta-base.nix {
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inherit pkgs lib;
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};
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# This is where the meta config is evaluated.
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eval = lib.evalModules {
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modules = lib.singleton metaConfig
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++ (lib.attrValues (removeAttrs argGen.targets ["common"]))
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++ (lib.attrValues hosts)
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++ (lib.optional (builtins.pathExists ./config/trusted/meta.nix) ./config/trusted/meta.nix)
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++ lib.singleton ./config/modules/meta/default.nix;
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specialArgs = {
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inherit sources;
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inherit (argGen) profiles users services;
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};
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};
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# The evaluated meta config.
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inherit (eval) config;
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/*
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Please note all specialArg generated specifications use the folder common to both import paths.
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Those import paths are as mentioned above next to `argGenNames`.
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This provides us with a ./. that contains (most relevantly):
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* deploy.targets -> a mapping of target name to host names
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* network.nodes -> host names to host NixOS + home-manager configs
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* profiles -> the specialArg generated from profiles/
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* users -> the specialArg generated from users/
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* targets -> the specialArg generated from targets/
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* do not use common, it is tf-nix specific config ingested at line 66 of config/modules/meta/deploy.nix for every target.
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* services -> the specialArg generated from services/
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*/
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in config // { inherit pkgs hosts sourceCache sources; } // argGen
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