From ed94fa013d791bf8c3d06ab05017e7776f266dbf Mon Sep 17 00:00:00 2001
From: Timothy DeHerrera <tim.deh@pm.me>
Date: Wed, 1 Jan 2020 21:55:19 -0700
Subject: [PATCH] shell.nix: basic command to build nixos

`nixos-rebuild` has unstable flake support. By adding a simple rebuild
command to the shell, we don't need to reply on it to switch
configurations anymore. At least until it stablizes.
---
 shell.nix | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/shell.nix b/shell.nix
index e5c4214e..c677a807 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,6 +1,24 @@
 { pkgs ? import <nixpkgs> {} }:
+let
+  configs = "${toString ./.}#nixosConfigurations";
+  hostname = pkgs.lib.fileContents /etc/hostname;
+  build = "config.system.build";
+
+  rebuild = pkgs.writeShellScriptBin "rebuild" ''
+    if [[ -z $1 ]]; then
+      echo "Usage: $0 [host] {switch|boot|test|iso}"
+    elif [[ $1 == "iso" ]]; then
+      nix build ${configs}.niximg.${build}.isoImage
+    elif [[ -z $2 ]]; then
+      nix run -vv ${configs}.${hostname}.${build}.toplevel -c switch-to-configuration $1
+    else
+      nix run -vv ${configs}.$1.${build}.toplevel -c switch-to-configuration $2
+    fi
+  '';
+in
 pkgs.mkShell {
   nativeBuildInputs = with pkgs; [
+    rebuild
     nixFlakes
   ];