Make vterm option in kubel-exec-pod opt-in (#100)

* Silence warning about misplaced interactive spec

In kubel-exec-vterm-pod:
kubel.el:939:4: Warning: misplaced interactive spec: ‘(interactive)’

* Make vterm option in kubel-exec-pop opt-in

README.md

@@ -33,6 +33,21 @@ Get it from Melpa, or copy and load the `kubel.el` file.
 If you want to have the evil compatibility package, get it from Melpa as well or
 load the `kubel-evil.el` file.
 
+# Setup
+
+```elisp
+(require 'kubel)
+(kubel-vterm-setup) ; If you wish to have vterm as an option when using exec
+```
+
+Or if one uses `use-package`
+
+```elisp
+(use-package kubel
+  :after (vterm)
+  :config (kubel-vterm-setup))
+```
+
 ## Usage
 
 To list the pods in your current context and namespace, call

kubel.el

@@ -990,7 +990,6 @@ P can be a single number or a localhost:container port pair."
 
 (defun kubel-exec-vterm-pod ()
   "Exec into the pod under the cursor -> vterm."
-  (require 'vterm)
   (interactive)
   (kubel-setup-tramp)
   (let* ((dir-prefix (kubel--dir-prefix))
@@ -1002,6 +1001,13 @@ P can be a single number or a localhost:container port pair."
          (vterm-shell "/bin/sh"))
     (vterm)))
 
+;;;###autoload
+(defun kubel-vterm-setup ()
+  "Adds a vterm enty to the KUBEL-EXEC-POP."
+  (require 'vterm)
+  (transient-append-suffix 'kubel-exec-popup "e"
+    '("v" "Vterm" kubel-exec-vterm-pod)))
+
 (defun kubel-exec-ansi-term-pod ()
   "Exec into the pod under the cursor -> `ansi-term'."
   (interactive)
@@ -1163,7 +1169,6 @@ RESET is to be called if the search is nil after the first attempt."
    ("!" "Shell command" kubel-exec-pod-by-shell-command)
    ("d" "Dired" kubel-exec-pod)
    ("e" "Eshell" kubel-exec-eshell-pod)
-   ("v" "Vterm" kubel-exec-vterm-pod)
    ("a" "Ansi-term" kubel-exec-ansi-term-pod)
    ("s" "Shell" kubel-exec-shell-pod)])