Add homebrew package to flake

flake.nix

@@ -60,6 +60,6 @@
 		modules = (import ./modules-all {}) //
 		          (import ./modules-linux {}) //
 		          (import ./modules-darwin {});
-		packages = import ./overlays/packages.nix { pkgs = nixstable; };
+		packages = (import ./overlays/packages.nix { inherit nixunstable flake-utils; });
 	};
 }

home/home.nix

@@ -31,6 +31,7 @@
 	home.stateVersion = "22.05";
 	home.packages = with pkgs; [
 		bitwarden-cli
+		brew
 		diffutils
 		findutils
 		git

home/xonsh_header.xsh

@@ -1,6 +1,7 @@
 # vim: set ft=python:
 from os import getcwd, uname
 from pathlib import Path
+from sys import platform
 
 
 #if  uname().sysname == 'Darwin' and ('__NIX_DARWIN_SET_ENVIRONMENT_DONE' not in ${...} or not $__NIX_DARWIN_SET_ENVIRONMENT_DONE):
@@ -19,3 +20,6 @@ xontrib load coreutils
 $PATH.insert(0, Path("~/.nix-profile/bin").expanduser())
 $PATH.insert(0, Path("~/src/bin").expanduser())
 $PATH.insert(0, Path("~/.local/bin").expanduser())
+
+if platform == "darwin":
+    $PATH.append(Path("/opt/homebrew/bin/"))

overlays/default.nix

@@ -80,6 +80,7 @@ in rec {
 	};
 
 	#fcitx-engines = if ! super.stdenv.isDarwin then super.fcitx5 else super.fcitx-engines;
+	brew = super.callPackage ./homebrew.nix {};
 
 	enwiki-dump = super.callPackage ./enwiki-dump.nix {};
 	hms = super.callPackage ./hms.nix {

overlays/homebrew.nix

@@ -0,0 +1,43 @@
+{
+lib,
+pkgs,
+stdenv,
+
+bash,
+curl,
+git,
+ruby,
+...}:
+
+stdenv.mkDerivation rec {
+	pname = "homebrew-installer";
+	version = "20230531";
+
+	src = pkgs.fetchFromGitHub {
+		owner = "Homebrew";
+		repo = "install";
+		rev = "716a1d024f32890ef75ea82c18a769abc24e9475";
+		sha256 = "sha256-xhxWWeCJm49bDzmBT2GHSC0CK1SoQArBhfh5sltGY5o=";
+	};
+
+	buildInputs = [
+		bash
+		curl
+		git
+		ruby
+	];
+
+	installPhase = ''
+		mkdir -p $out/bin/
+		cp ${src}/install.sh $out/bin/install-homebrew.sh
+		cp ${src}/uninstall.sh $out/bin/uninstall-homebrew.sh
+	'';
+
+	meta = with lib; {
+		description = "Runs the homebrew installer";
+		homepage = "https://github.com/Homebrew/";
+		license = licenses.bsd2;
+		platforms = [ "aarch64-darwin" "x86_64-darwin" ];
+		maintainers = [ maintainers.greg ];
+	};
+}

overlays/packages.nix

@@ -1,8 +1,10 @@
-{ pkgs, ... }:
+{ nixunstable, flake-utils }:
 
+flake-utils.lib.eachDefaultSystemMap (system:
 	let
-	callPackage = pkgs.lib.callPackageWith pkgs;
+		pkgs = (import nixunstable { inherit system; });
 		lib = pkgs.lib;
+		callPackage = pkgs.lib.callPackageWith pkgs;
 		python = pkgs.packages.python3;
 		cp = pkgs.packages.python3.pkgs.callPackage;
 	in {
@@ -16,9 +18,11 @@ in {
 			inherit pkgs;
 		};
 
+		brew = pkgs.callPackage ./homebrew.nix {};
+
 		xonsh-direnv = pkgs.callPackage ./xonsh-direnv.nix {
 			buildPythonPackage = pkgs.python3.pkgs.buildPythonPackage;
 			fetchPypi = pkgs.python.pkgs.fetchPypi;
 		};
-
 	}
+)