From 533da03db0a7d6e77bf5a18a490e721d9ba06717 Mon Sep 17 00:00:00 2001
From: earnest ma <me@earne.link>
Date: Sat, 14 Aug 2021 13:36:11 -0400
Subject: [PATCH] Limit graphical programs by hostname

---
 .config/nixpkgs/graphical.nix | 20 ++++++++++++++++++++
 .config/nixpkgs/home.nix      | 20 ++++++++------------
 .config/nixpkgs/hostname.nix  | 21 +++++++++++++++++++++
 3 files changed, 49 insertions(+), 12 deletions(-)
 create mode 100644 .config/nixpkgs/graphical.nix
 create mode 100644 .config/nixpkgs/hostname.nix

diff --git a/.config/nixpkgs/graphical.nix b/.config/nixpkgs/graphical.nix
new file mode 100644
index 0000000..9e57f9c
--- /dev/null
+++ b/.config/nixpkgs/graphical.nix
@@ -0,0 +1,20 @@
+{ pkgs, ... }:
+
+let
+  pkgsUnstable = import <nixpkgs-unstable> {};
+in
+{
+  home.packages = with pkgs; [
+    authy
+    barrier
+    pkgsUnstable.discord
+    google-chrome
+    todoist-electron
+    pkgsUnstable.zoom-us
+
+    pkgsUnstable.logseq
+    sublime-music
+
+    alacritty
+  ];
+}
diff --git a/.config/nixpkgs/home.nix b/.config/nixpkgs/home.nix
index 7e40c95..6c649f0 100644
--- a/.config/nixpkgs/home.nix
+++ b/.config/nixpkgs/home.nix
@@ -1,6 +1,8 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 let
+  inherit (lib) optionals;
+  hostName = import ./hostname.nix lib;
   # Be able to use unstable packages
   pkgsUnstable = import <nixpkgs-unstable> {};
 
@@ -10,14 +12,12 @@ in
   home.username = "earne";
   home.homeDirectory = "/home/earne";
 
-  home.packages = with pkgs; [
-    authy # non-free
-    barrier
-    pkgsUnstable.discord # non-free
-    google-chrome # non-free
-    todoist-electron # non-free
-    pkgsUnstable.zoom-us # non-free
+  imports =
+    (optionals (hostName == "tycho") [
+      ./graphical.nix
+    ]);
 
+  home.packages = with pkgs; [
     # Doom Emacs + dependencies
     pkgsUnstable.fd
     pkgsUnstable.ripgrep
@@ -27,10 +27,6 @@ in
     isync
     khard
 
-    pkgsUnstable.logseq
-    sublime-music
-
-    alacritty
     gitFull
     git-extras
     ghq
diff --git a/.config/nixpkgs/hostname.nix b/.config/nixpkgs/hostname.nix
new file mode 100644
index 0000000..849aef4
--- /dev/null
+++ b/.config/nixpkgs/hostname.nix
@@ -0,0 +1,21 @@
+lib:
+
+let
+
+  inherit (builtins) currentSystem;
+  inherit (lib) maybeEnv fileContents;
+  inherit (lib.systems.elaborate { system = currentSystem; }) isLinux isDarwin;
+
+in
+
+maybeEnv "HOST" (fileContents (
+  if !isDarwin then
+    /etc/hostname
+  else
+    derivation {
+      name = "hostname";
+      system = currentSystem;
+      builder = "/bin/sh";
+      args = [ "-c" "/usr/sbin/scutil --get LocalHostName > $out" ];
+    }
+))