Adding options for overlays, pkgs, internal library etc, checkout flake outputs to see interactions

lib/default.nix

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+{ lib, ... }:
+{
+  # use path relative to the root of the project
+  relativeToRoot = lib.path.append ../.;
+  scanPaths = path:
+    builtins.map
+      (f: (path + "/${f}"))
+      (builtins.attrNames
+        (lib.attrsets.filterAttrs
+          (
+            path: _type:
+              (_type == "directory") # include directories
+              || (
+                # FIXME this barfs when child directories don't contain a default.nix
+                # example:
+                # error: getting status of '/nix/store/mx31x8530b758ap48vbg20qzcakrbc8 (see hosts/common/core/services/default.nix)a-source/hosts/common/core/services/default.nix': No such file or directory
+                # I created a blank default.nix in hosts/common/core/services to work around
+                (path != "default.nix") # ignore default.nix
+                && (lib.strings.hasSuffix ".nix" path) # include .nix files
+              )
+          )
+          (builtins.readDir path)));
+}
+

modules/home-manager/default.nix

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+# Add your reusable home-manager modules to this directory, on their own file (https://nixos.wiki/wiki/Module).
+# These should be stuff you would like to share with others, not your personal configurations.
+{
+  # List your module files here
+  # my-module = import ./my-module.nix;
+}

modules/nixos/default.nix

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+# Add your reusable NixOS modules to this directory, on their own file (https://nixos.wiki/wiki/Module).
+# These should be stuff you would like to share with others, not your personal configurations.
+{
+  # List your module files here
+  # my-module = import ./my-module.nix;
+}

overlays/default.nix

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+#
+# This file defines overlays/custom modifications to upstream packages
+#
+
+{ inputs, ... }: {
+  # This one brings our custom packages from the 'pkgs' directory
+  additions = final: _prev: import ../pkgs { pkgs = final; };
+
+  # This one contains whatever you want to overlay
+  # You can change versions, add patches, set compilation flags, anything really.
+  # https://nixos.wiki/wiki/Overlays
+  modifications = final: prev: {
+    # example = prev.example.overrideAttrs (oldAttrs: let ... in {
+    # ...
+    # });
+  };
+
+  # When applied, the unstable nixpkgs set (declared in the flake inputs) will
+  # be accessible through 'pkgs.unstable'
+  unstable-packages = final: _prev: {
+    unstable = import inputs.nixpkgs-unstable {
+      system = final.system;
+      config.allowUnfree = true;
+    };
+  };
+}

pkgs/default.nix

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+# You can build these directly using 'nix build .#example'
+
+{ pkgs ? import <nixpkgs> { } }: rec {
+
+  #################### Packages with external source ####################
+
+  # name = pkgs.callPackage ./name { };
+}

vars/default.nix

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+{ inputs, lib }:
+{
+  username = "laozi";
+  #domain = inputs.nix-secrets.domain;
+  #userFullName = inputs.nix-secrets.full-name;
+  #handle = "madmin";
+  #userEmail = inputs.nix-secrets.user-email;
+  #gitEmail = "madmin@noreply.codeberg.org";
+  #workEmail = inputs.nix-secrets.work-email;
+  #networking = import ./networking.nix { inherit lib; };
+  persistFolder = "/persist";
+  isMinimal = false; # Used to indicate nixos-installer build
+}

vars/networking.nix

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+{ ... }:
+{}