make system configurable

lib/default.nix

@@ -64,7 +64,7 @@ let
       rec {
         default = oizys;
         oizys = pkgs.callPackage ../pkgs/oizys { };
-        iso = mkIso.config.system.build.isoImage;
+        iso-x86_64-linux = (mkIso "x86_64-linux").config.system.build.isoImage;
       }
       // (import ../pkgs { inherit pkgs lib inputs; })
     );

lib/extended.nix

@@ -140,6 +140,12 @@ let
 
   pathFromHostName = host: ../. + "/hosts/${host}";
   hostFiles = host: host |> pathFromHostName |> listFilesRecursive |> filter isNixFile;
+  hostSystem =
+    host:
+    let
+      f = (host |> pathFromHostName) + "/settings/system";
+    in
+    if pathExists f then readLinesNoComment f else "x86_64-linux";
 
   # if the specified path doesn't exist returns an empty array
   tryReadLinesNoComment = f: if pathExists f then (readLinesNoComment f) else [ ];
@@ -208,6 +214,7 @@ in
     listify
     loadOverlays
     hostFiles
+    hostSystem
     oizysSettings
     tryPkgsFromFile
     ;

lib/generators.nix

@@ -15,6 +15,7 @@ let
     listify
     readSettings
     hostFiles
+    hostSystem
     ;
   flake = flakeFromSystem "x86_64-linux";
   nixosModules = names: names |> listify |> map (n: inputs.${n}.nixosModules.default);
@@ -30,10 +31,13 @@ let
       ;
   };
 
-  mkIso = nixosSystem {
+  mkIso =
+    system:
+    nixosSystem {
+      system = system;
       modules =
         [
-        { nixpkgs.hostPlatform = "x86_64-linux"; }
+          { nixpkgs.hostPlatform = system; }
         ]
         ++ (nixosModules "lix-module")
         ++ (selfModules "essentials|iso");
@@ -42,10 +46,14 @@ let
 
   mkSystem =
     hostName:
+    let
+      system = hostSystem hostName;
+    in
     nixosSystem {
+      inherit system;
       modules =
         [
-          { nixpkgs.hostPlatform = "x86_64-linux"; }
+          { nixpkgs.hostPlatform = system; }
         ]
         ++ (selfModules ''oizys'')
         ++ (nixosModules ''lix-module|sops-nix'')