lib: add overlay

lib/_default.nix

@@ -1,141 +1,8 @@
 {
   unstable,
-  self,
   ...
 }@inputs:
 let
   inherit (unstable) lib;
 in
-lib.fix (myLib: {
+lib.fix (self: (import ./overlay.nix inputs self lib))
-  wrench = lib.flip lib.pipe;
-
-  needsSystem = lib.flip builtins.elem [
-    "apps"
-    "checks"
-    "defaultPackage"
-    "devShell"
-    "devShells"
-    "formatter"
-    "legacyPackages"
-    "packages"
-  ];
-
-  constructInputs' =
-    system:
-    myLib.wrench [
-      (lib.filterAttrs (_: lib.isType "flake"))
-      (lib.mapAttrs (
-        _: lib.mapAttrs (name: value: if myLib.needsSystem name then value.${system} else value)
-      ))
-    ];
-
-  listNixFilesRecursive = myLib.wrench [
-    builtins.unsafeDiscardStringContext
-    lib.filesystem.listFilesRecursive
-    (builtins.filter (x: !lib.hasPrefix "_" (builtins.baseNameOf x) && lib.hasSuffix ".nix" x))
-  ];
-
-  addSchizophreniaToModule =
-    x:
-    let
-      # the imported module
-      imported = import x;
-    in
-    /*
-      If the module isn't a function then
-      it doesn't need arguments and error
-      message locations will function correctly
-    */
-    if !lib.isFunction imported then
-      x
-    else
-      let
-        # all arguments defined in the module
-        funcArgs = lib.functionArgs imported;
-        /*
-          The names of all arguments which will be
-          available to be inserted into the module arguments
-        */
-        argNames = builtins.attrNames inputs ++ [
-          "inputs"
-          "inputs'"
-          "self'"
-          "_dir"
-        ];
-
-        /*
-          arguments to be passed minus
-          per system attributes
-          for example flake-parts-esque inputs'
-        */
-        argsPre = {
-          inherit inputs self;
-          /*
-            _dir is the "self" derived
-            path to the directory containing the module
-          */
-          _dir = builtins.dirOf x;
-        };
-
-        /*
-          arguments which will be inserted
-          set to the before per-system values
-        */
-        providedArgs = lib.pipe funcArgs [
-          (lib.filterAttrs (n: _: builtins.elem n argNames))
-          (lib.mapAttrs (n: _: argsPre.${n} or { }))
-        ];
-
-        /*
-          arguments which the module system
-          not provided here. either to be
-          provided by the module system or invalid
-        */
-        neededArgs = lib.filterAttrs (n: _: !builtins.elem n argNames) funcArgs;
-      in
-      {
-        __functionArgs = neededArgs // {
-          /*
-            always require pkgs to be passed
-            to derive system from pkgs.stdenv.system
-          */
-          pkgs = false;
-        };
-
-        __functor =
-          /*
-            args is specialArgs + _module.args which are needed
-            and always pkgs
-          */
-          _: args:
-          imported (
-            /*
-              take module system provided arguments
-              filter them so only the required ones are passed
-            */
-            (lib.filterAttrs (n: _: neededArgs ? ${n}) args)
-            # add needed arguments
-            // (
-              providedArgs
-              # add system dependent arguments
-              // (
-                let
-                  inputs' = myLib.constructInputs' args.pkgs.stdenv.system inputs;
-
-                  actuallyAllArgs = inputs' // {
-                    inherit inputs';
-                    self' = inputs'.self;
-                    inherit (inputs) self;
-                  };
-                in
-                lib.filterAttrs (n: _: providedArgs ? ${n}) actuallyAllArgs
-              )
-            )
-          )
-          # add _file to the final module attribute set
-          // {
-            _file = x;
-          };
-      };
-
-})

lib/overlay.nix

@@ -0,0 +1,137 @@
+{ self, ... }@inputs:
+
+myLib: lib: {
+  overlay = import ./overlay.nix inputs;
+
+  wrench = lib.flip lib.pipe;
+
+  needsSystem = lib.flip builtins.elem [
+    "apps"
+    "checks"
+    "defaultPackage"
+    "devShell"
+    "devShells"
+    "formatter"
+    "legacyPackages"
+    "packages"
+  ];
+
+  constructInputs' =
+    system:
+    myLib.wrench [
+      (lib.filterAttrs (_: lib.isType "flake"))
+      (lib.mapAttrs (
+        _: lib.mapAttrs (name: value: if myLib.needsSystem name then value.${system} else value)
+      ))
+    ];
+
+  listNixFilesRecursive = myLib.wrench [
+    builtins.unsafeDiscardStringContext
+    lib.filesystem.listFilesRecursive
+    (builtins.filter (x: !lib.hasPrefix "_" (builtins.baseNameOf x) && lib.hasSuffix ".nix" x))
+  ];
+
+  addSchizophreniaToModule =
+    x:
+    let
+      # the imported module
+      imported = import x;
+    in
+    /*
+      If the module isn't a function then
+      it doesn't need arguments and error
+      message locations will function correctly
+    */
+    if !lib.isFunction imported then
+      x
+    else
+      let
+        # all arguments defined in the module
+        funcArgs = lib.functionArgs imported;
+        /*
+          The names of all arguments which will be
+          available to be inserted into the module arguments
+        */
+        argNames = builtins.attrNames inputs ++ [
+          "inputs"
+          "inputs'"
+          "self'"
+          "_dir"
+        ];
+
+        /*
+          arguments to be passed minus
+          per system attributes
+          for example flake-parts-esque inputs'
+        */
+        argsPre = {
+          inherit inputs self;
+          /*
+            _dir is the "self" derived
+            path to the directory containing the module
+          */
+          _dir = builtins.dirOf x;
+        };
+
+        /*
+          arguments which will be inserted
+          set to the before per-system values
+        */
+        providedArgs = lib.pipe funcArgs [
+          (lib.filterAttrs (n: _: builtins.elem n argNames))
+          (lib.mapAttrs (n: _: argsPre.${n} or { }))
+        ];
+
+        /*
+          arguments which the module system
+          not provided here. either to be
+          provided by the module system or invalid
+        */
+        neededArgs = lib.filterAttrs (n: _: !builtins.elem n argNames) funcArgs;
+      in
+      {
+        __functionArgs = neededArgs // {
+          /*
+            always require pkgs to be passed
+            to derive system from pkgs.stdenv.system
+          */
+          pkgs = false;
+        };
+
+        __functor =
+          /*
+            args is specialArgs + _module.args which are needed
+            and always pkgs
+          */
+          _: args:
+          imported (
+            /*
+              take module system provided arguments
+              filter them so only the required ones are passed
+            */
+            (lib.filterAttrs (n: _: neededArgs ? ${n}) args)
+            # add needed arguments
+            // (
+              providedArgs
+              # add system dependent arguments
+              // (
+                let
+                  inputs' = myLib.constructInputs' args.pkgs.stdenv.system inputs;
+
+                  actuallyAllArgs = inputs' // {
+                    inherit inputs';
+                    self' = inputs'.self;
+                    inherit (inputs) self;
+                  };
+                in
+                lib.filterAttrs (n: _: providedArgs ? ${n}) actuallyAllArgs
+              )
+            )
+          )
+          # add _file to the final module attribute set
+          // {
+            _file = x;
+          };
+      };
+
+}