feat: kubectx and stern to nix devshell (#30)

The main README recommends to install kubectx and stern as additional
utilities. To be consistent, I'd suggest to include these in the nix
devshell. Since we're installing kubectx, this PR also sets up
one-letter aliases for kubectx and kubens.

Signed-off-by: Jeremy Schneider <[email protected]>

Author: ardentperf

flake.nix

@@ -18,6 +18,14 @@
         alias k=kubectl
         complete -o default -F __start_kubectl k
 
+        # setup 'c/n' as 'kubectx/kubens' aliases
+        source /nix/store/*-kubectx-*/share/bash-completion/completions/kubectx.bash
+        alias c=kubectx
+        complete -F _kube_contexts c
+        source /nix/store/*-kubectx-*/share/bash-completion/completions/kubens.bash
+        alias n=kubens
+        complete -F _kube_namespaces n
+
         # Setup 'kc' as a 'kubectl cnpg' alias
         source <(kubectl cnpg completion bash)
         alias kc="kubectl cnpg"
@@ -26,12 +34,14 @@
 
       packages = [
         pkgs.kubectl
+        pkgs.kubectx
         pkgs.kubernetes-helm
         pkgs.kind
         pkgs.jq
         pkgs.curl
         pkgs.kubectl-cnpg
         pkgs.kubectl-view-secret
+        pkgs.stern
         pkgs.cmctl
         pkgs.k9s
         pkgs.lazydocker