Transformer does not get applied when calling the command from elisp code

[mihaiolteanu]

I've defined my own command using ivy-read and added ivy-rich transformers to it. When calling it interactively it works as expected, but when called directly from elisp code the transformers do not get applied.

A command to install packages using pacman,

(defun eshell/install (&optional item)
  (interactive)
  (ivy-read
   "Package: "
   (mapcar (lambda (strings) (s-join " | " strings))
      (-partition 2 (s-lines (shell-command-to-string "pacman -Ss \"\""))))
   :initial-input item
   :action (lambda (choice)          
             (with-current-buffer
                 ;; If not in an eshell buffer, create one and switch to it.
                 (or (and (buffer-mode-p (buffer-name) 'eshell-mode)
                          (buffer-name))
                     (open-eshell-in-eshells-tab-here))
               (insert "sudo pacman -S ")
               (insert (car (s-split " " (-second-item (s-split "/" choice)))))
               (funcall 'eshell-send-input)))))

The transformers to display the package name, version and info,

(defun eshell/install-package-transformer (entry)
  (-second-item (s-split "/" (-first-item (s-split " " entry)))))

(defun eshell/install-version-transformer (entry)      
  (-second-item (s-split " " entry)))

(defun eshell/install-package-docstring-transformer (entry)
  (-last-item (s-split "|" entry)))

Setting up the transformers for the above command,

(ivy-rich-set-columns
 'eshell/install
 `((eshell/install-package-transformer
    (:width 0.10))
   (eshell/install-version-transformer
    (:width 0.06 :face window-divider :box (:line-width 2 :color "PowderBlue" :style 1)))
   (eshell/install-package-docstring-transformer
    (:width 100 :face window-divider :box (:line-width 2 :color "PowderBlue" :style 1)))))

The results when calling eshell/install interactively,

The results when calling eshell/install directly, from elisp code,

In the first instance the transformers take effect, in the second not. This bad behavior does not happen with the default enriched commands, like counsel-describe-function and the like so I assume it is my fault. I did look at the other commands, like the already mentioned counsel-describe-function, for example, to figure out how to implement my own, so maybe I've missed some details in the process?