lisp: scoping vars in repetitive defuns

[Matt Price <moptop99@gmail.com>]

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I have a number of convenience functions define to help me with grading
assignments. As I go through the semester, i update all of these functions
modestly so that they'rehelpful for grading the current assignment.

I big chunk of these simple functions is taken up just declaring variables
with (let (())) forms.  Each function uses some ofhte same variables, e.g:

(defun dh-find-files ()
  (interactive)
  (let* ((base (org-entry-get (point) "ORG_LMS_ASSIGNMENT_DIRECTORY"))
         (gh (org-entry-get (point) "GITHUB"))
        (f2o `( ,(concat "Reflection/" gh ".md") ,(concat "students/" gh
".json")))) ;;;; "01/index.html" "02/index.html" "03/style.css"
"04/style.css"
    (message "%s" f2o)
    ;; make more flexible for resubmits
    (shell-command (concat "cd " base " && git checkout " gh "-master"))
    (dolist (x f2o)
      (if (file-exists-p (concat base "/" x))
          (find-file-other-window (concat base "/" x) )
        (message "File %s does not exist, not opening." x)))))

(defun dh-tests ()
  (interactive)
  (let* ((base (org-entry-get (point) "ORG_LMS_ASSIGNMENT_DIRECTORY" ))
         (gh (org-entry-get (point) "GITHUB")))
    (with-temp-buffer (shell-command (concat "cd " base " && npm test") t))
;; the "t" lets us suppress buffer
    (browse-url-of-file (concat base "/TestResults/testresults.html"))
    ;; (dh-mocha-run)

    ))

----------

This semester I changed some elements of my workflow and I had to update
all the (org-entry-get) calls to new values.  It makes me think the code is
less maintainable than it could be.  I would like to do something like this:

(lexical-let ((base `(org-entry-get (point) "ORG_LMS_ASSIGNMENT_DIRECTORY")
                   (gh `(org-entry-get (point) "GITHUB")) )
    (defun dh-find-files ()
(with-temp-buffer (shell-command (concat "cd " base " && npm test") t)) ;;
the "t" lets us suppress buffer
    (browse-url-of-file (concat base "/TestResults/testresults.html")))))


Obviously it doesn't work this way. But is there any way to set macros like
this to be expanded later inside a function definition? I feel certain
there must be...

Thanks,

Matt

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