feat(work): load kube-tmux from a pinned flake input

kube-tmux is not in nixpkgs, so add the upstream repo as a flake = false
input and reference ${inputs.kube-tmux}/kube.tmux directly. The script is now
always in the store, so the previous $HOME/code/kube-tmux existence guard is
removed and the tmux status line no longer depends on a manual checkout.

Refs #50

flake.lock

@@ -191,6 +191,22 @@
         "type": "github"
       }
     },
+    "kube-tmux": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1779714285,
+        "narHash": "sha256-l1wjg2ReWKCI7h/K11vvX2ykYTs/mVD+tfz/mQsjn/E=",
+        "owner": "jonmosco",
+        "repo": "kube-tmux",
+        "rev": "8b7e1d127c16b6dc87ff5743f4d775b245198b69",
+        "type": "github"
+      },
+      "original": {
+        "owner": "jonmosco",
+        "repo": "kube-tmux",
+        "type": "github"
+      }
+    },
     "nix-darwin": {
       "inputs": {
         "nixpkgs": [
@@ -373,6 +389,7 @@
         "flake-parts": "flake-parts",
         "git-hooks": "git-hooks",
         "home-manager": "home-manager",
+        "kube-tmux": "kube-tmux",
         "nix-darwin": "nix-darwin",
         "nix-homebrew": "nix-homebrew",
         "nix-index-database": "nix-index-database",

flake.nix

@@ -60,6 +60,13 @@
       url = "github:NixOS/nixos-hardware";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    # kube-tmux: kube context/namespace for the tmux status line on the work
+    # host. Not in nixpkgs and not a flake -- pinned here as a plain source so
+    # the script is always in the store (no manual checkout). See work.nix.
+    kube-tmux = {
+      url = "github:jonmosco/kube-tmux";
+      flake = false;
+    };
   };
 
   outputs =

users/emmathorpe/work.nix

@@ -1,6 +1,11 @@
 # Work (EDaaS/WSL) home profile: corporate toolchain + tmux tweaks. Git identity
 # comes from the registry (users/registry.nix), not here.
-{ pkgs, lib, ... }:
+{
+  pkgs,
+  lib,
+  inputs,
+  ...
+}:
 
 {
   # Host-scoped extras for this machine only (the EDaaS/WSL host).
@@ -47,10 +52,10 @@
     docker = "/run/current-system/sw/bin/docker";
   };
   programs.tmux = {
-    # kube-tmux is an external checkout; guard on its presence so the status
-    # line degrades gracefully (no per-refresh error) when it isn't cloned.
+    # kube context/namespace in the status line. kube-tmux is pinned as a flake
+    # input (it is not in nixpkgs), so the script is always present in the store.
     extraConfig = ''
-      set -g status-right "#(if [ -f $HOME/code/kube-tmux/kube.tmux ]; then /run/current-system/sw/bin/bash $HOME/code/kube-tmux/kube.tmux 250 red black; fi)"
+      set -g status-right "#(${pkgs.bash}/bin/bash ${inputs.kube-tmux}/kube.tmux 250 red black)"
     '';
   };
   programs.go = {