How to adapt my work style to the employer's standard in Emacs

I write some set up code in ~/.custom.el. It will detect which machine and what directory I'm working on. Then I hook the set up code when major mode (js2-mode, web-mode, for example) loaded.

In my ~/.emacs,

(if (file-readable-p (expand-file-name "~/.custom.el"))
     (load-file (expand-file-name "~/.custom.el")))

Content of my ~/.custom.el:

;; (getenv "HOSTNAME") won't work because $HOSTNAME is not an env variable
;; (system-name) won't work because as Optus required, my /etc/hosts is changed
(defun my/at-office ()
  (interactive)
  (let ((my-hostname (with-temp-buffer
                       (shell-command "hostname" t)
                       (goto-char (point-max))
                       (delete-char -1)
                       (buffer-string))
                     ))
    (and (string= my-hostname "my-sydney-workpc")
         (not (or (string= my-hostname "sydneypc")
                  (string= my-hostname "ChenBinMacAir")
                  (string= my-hostname "eee")
                  )))
    ))

(defun my/use-office-style ()
  (interactive)
  (let ((dir (if (buffer-file-name)
                 (file-name-directory (buffer-file-name))
               "")))
    (string-match-p "CompanyProject" dir)
    ))

(defun my/setup-develop-environment ()
  (cond
   ((my/use-office-style)
    (message "Office code style!")
    (setq coffee-tab-width 4)
    (setq javascript-indent-level 4)
    (setq js-indent-level 4)
    (setq js2-basic-offset 4)
    (setq web-mode-indent-style 4))
   (t
    (message "My code style!")
    (setq coffee-tab-width 4)
    (setq javascript-indent-level 2)
    (setq js-indent-level 2)
    (setq js2-basic-offset 2)
    (setq web-mode-indent-style 2))
   ))

(add-hook 'js2-mode-hook 'my/setup-develop-environment)
(add-hook 'web-mode-hook 'my/setup-develop-environment)