Add myutils to base system

So I can import it everywhere.

lib/myutils.nix

@@ -0,0 +1,16 @@
+{ lib, pkgs, ... }:
+
+let
+	stripTabs = text: let
+		# Whether all lines start with a tab (or is empty)
+		shouldStripTab = lines: builtins.all (line: (line == "") || (pkgs.lib.strings.hasPrefix "	" line)) lines;
+		# Strip a leading tab from all lines
+		stripTab = lines: builtins.map (line: pkgs.lib.strings.removePrefix "	" line) lines;
+		# Strip tabs recursively until there are none
+		stripTabs = lines: if (shouldStripTab lines) then (stripTabs (stripTab lines)) else lines;
+	in
+		# Split into lines. Strip leading tabs. Concat back to string.
+		builtins.concatStringsSep "\n" (stripTabs (pkgs.lib.strings.splitString "\n" text));
+in {
+	stripTabs = stripTabs;
+}

modules/system/base.nix

@@ -1,6 +1,9 @@
 { config, configFiles, lib, pkgs, ... }:
 
 {
+	# Add my custom utilities
+	_module.args.myutils = import ../../lib/myutils.nix { lib = lib; pkgs = pkgs; };
+
 	boot.tmp.cleanOnBoot = true;
 	environment.systemPackages = map lib.lowPrio [
 		pkgs.curl