Starting out simple. Small.

README.md

@@ -1,22 +1,28 @@
 # Metanix
-*Declare your infrastructure!*
+
+_Declare your infrastructure!_
 
 **THIS IS STILL IN DESIGN AND EXPERIMENTATION PHASE**
 
 ## Description
+
 Metanix is a nix library designed to allow a central, no-nonsense nix file to be written to allow for a Source of Truth leading to deterministic configuration identifiers like IP addresses, UIDs, GIDs, and enable quickly establishing frameworks for NixOS systems existing within an ecosystem.
 As such, I am trying to design this system to enable a would-be admin to answer very simple one-word questions. Sort of.
 
 ## What?
+
 Or, in other words, what systems do you want Metanix to manage or at least be aware of?
 
 ## Where?
+
 Or, in other words, what networks and subnets do you have and where do your systems/users belong?
 
 ## Who?
+
 Or, in other words, who are your users?
 
 ## How?
+
 Or, in other words, what kind of access control groups do you want or need to best control how everything is used.
 
 ## Enter: THINGS
@@ -119,28 +125,32 @@ More on each of these categories of things later.
             role = "infrastructure";
             tags = [ "router" "linode" ];
             services = [ "nginx-proxy" "headscale" ];
-            config = {...}: { # NixOS config here, or use a path to one. };
+            config = {...}: { # NixOS config here, or use a path to one.
+            };
         };
         metatron = {
             owner = "yaro";
             nixOS = true;
             role = "server";
             tags = ["server" "linode" "upstream"];
-            config = {...}: { # NixOS config here, or use a path to one. };
+            config = {...}: { # NixOS config here, or use a path to one.
+            };
         };
         io = {
             owner = "yaro";
             nixOS = true;
             role = "infrastructure";
             tags = ["router" "downstream"];
-            config = {...}: { # NixOS config here, or use a path to one. };
+            config = {...}: { # NixOS config here, or use a path to one.
+            };
         };
         europa = {
             owner = "yaro";
             nixOS = true;
             role = "infrastructure";
             tags = ["router" "downstream"];
-            config = {...}: { # NixOS config here, or use a path to one. };
+            config = {...}: { # NixOS config here, or use a path to one.
+            };
         };
         deimos = {
             owner = "yaro";
@@ -157,7 +167,8 @@ More on each of these categories of things later.
                 "forgejo"
                 "headscale"
             ];
-            config = {...}: { # NixOS config here, or use a path to one. };
+            config = {...}: { # NixOS config here, or use a path to one.
+            };
         };
         phobos = {
             owner = "yaro";
@@ -171,7 +182,8 @@ More on each of these categories of things later.
                 "sandbox"
                 "node-red"
             ];
-            config = {...}: { # NixOS config here, or use a path to one. };
+            config = {...}: { # NixOS config here, or use a path to one.
+            };
         };
         terra = {
             owner = "yaro";
@@ -189,7 +201,8 @@ More on each of these categories of things later.
     group = {
         userGroups = {
             programmers = {
-                config = { ... }: { # Home-manager config here, or use a path to one. };
+                config = { ... }: { # Home-manager config here, or use a path to one.
+                };
             };
         };
         systemGroups = {
@@ -198,7 +211,8 @@ More on each of these categories of things later.
                     "nfs"
                     "isci"
                 ];
-                config = { ... }: { # Home-manager config here, or use a path to one. };
+                config = { ... }: { # Home-manager config here, or use a path to one.
+                };
             };
         };
     };

flake.lock

@@ -2,18 +2,14 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1752950548,
-        "narHash": "sha256-NS6BLD0lxOrnCiEOcvQCDVPXafX1/ek1dfJHX1nUIzc=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "c87b95e25065c028d31a94f06a62927d18763fdf",
-        "type": "github"
+        "lastModified": 0,
+        "narHash": "sha256-NV4S2Lf2hYmZQ3Qf4t/YyyBaJNuxLPyjzvDma0zPp/M=",
+        "path": "/nix/store/4878dzkl1bdxv6wqavzy7bdracvl9q16-source",
+        "type": "path"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "type": "indirect"
       }
     },
     "root": {

lib/functions/buildLocationList.nix

@@ -0,0 +1 @@
+locations: builtins.attrNames locations

lib/metanix.nix

@@ -1,45 +1,12 @@
-# lib/metanix.nix
 { data, lib }:
 
 let
-  buildSystemIndex =
+  indexOf = name: names:
     let
-      flattenSystems = locationName: subnetName: systems:
-        lib.mapAttrsToList
-          (systemName: systemCfg: {
-            inherit systemName locationName subnetName;
-            primary = systemCfg.primary or false;
-            macs = systemCfg.macAddresses or [ ];
-          })
-          systems;
-
-      allSystems =
-        builtins.concatLists (
-          lib.mapAttrsToList
-            (locationName: location:
-              builtins.concatLists (
-                lib.mapAttrsToList
-                  (subnetName: subnet:
-                    flattenSystems locationName subnetName (subnet.systems or { })
-                  )
-                  (location.subnets or { })
-              )
-            )
-            data.locations
-        );
+      indexed = builtins.imap0 (i: v: { inherit i v; }) names;
+      matches = builtins.filter (x: x.v == name) indexed;
     in
-    builtins.foldl'
-      (acc: entry:
-        let
-          existing = acc.${entry.systemName} or [ ];
-        in
-        acc // {
-          ${entry.systemName} = existing ++ [ builtins.removeAttrs entry [ "systemName" ] ];
-        }
-      )
-      { }
-      allSystems;
+    if matches == [ ] then null else (builtins.head matches).i;
+
 in
-{
-  inherit buildSystemIndex;
-}
+{ indexOf = indexOf; }

test/test-buildLocationList.nix

@@ -0,0 +1,7 @@
+let
+  buildLocationList = import ../lib/functions/buildLocationList.nix;
+  sampleData = import ./meta.nix;
+in
+{
+  result = buildLocationList sampleData.locations;
+}