See if this helps:

(defun my-org-html-post-process (file)
  "Do stuff on FILE after it is created by org html export."
  ;; Do your stuff here
  (message "Exported file: %s" file)
  file) ; Has to return FILE

(defun my-org-html-export-to-html
    (&optional async subtreep visible-only body-only ext-plist)
  "Pass `my-org-html-post-process' as POST-PROCESS arg to
`org-export-to-file'.
Rest of the code is the exact same as the original
`org-html-export-to-html'."
  (interactive)
  (let* ((extension (concat "." (or (plist-get ext-plist :html-extension)
                                    org-html-extension
                                    "html")))
         (file (org-export-output-file-name extension subtreep))
         (org-export-coding-system org-html-coding-system))
    (org-export-to-file 'html file
      async subtreep visible-only body-only ext-plist
#'my-org-html-post-process)))

(advice-add 'org-html-export-to-html :override #'my-org-html-export-to-html)

On Wed, Aug 10, 2016 at 5:28 AM Christopher DeMarco <cdemarco@gmail.com>
wrote:

> Hi all . . . I want to run a command (to sync a directory with AWS S3)
> after my agenda views are exported to HTML. There used to be a
> `org-export-html-final-hook` which looks like something that could be
> helpful, but it doesn't appear to be available anymore.
>
> Is there a way to do this in current Org?
>
-- 

Kaushal Modi