Add skewer-eval-and-print-last-expression.

[kostafey]

It's an attempt to bring something like CIDER cider-pprint-eval-last-sexp.

[skeeto]

I like the idea, but not this particular (fragile) approach. Also, there already is a skewer-eval-print-last-expression, which prints the result into the current buffer. That's how skewer-eval-last-expression behaves with a prefix argument, which itself is a common Emacs convention.

Taking a look at cider-pprint-eval-last-sexp, I see it puts the output in a deciated *cider-result* buffer? What do you think of something like this instead? (Hmmm, with the js2-mode overhead, this is getting a little copy-pastey).

(defvar skewer-result-buffer "*skewer-result*")

(defun skewer-pprint-eval-last-expression ()
  (interactive)
  (if js2-mode-buffer-dirty-p
      (js2-mode-wait-for-parse
       (skewer--save-point #'skewer-pprint-eval-last-expression))
    (cl-destructuring-bind (string start end) (skewer-get-last-expression)
      (skewer-flash-region start end)
      (skewer-eval string #'skewer-post-pprint :verbose t)
      (pop-to-buffer (get-buffer-create skewer-result-buffer))
      (erase-buffer)
      (js2-mode))))

(defun skewer-post-pprint (result)
  (if (not (skewer-success-p result))
      (skewer-post-minibuffer result)
    (let ((value (cdr (assoc 'value result))))
      (insert value)
      (insert "\n")
      (js2-reparse))))

With this name (pprint), I'd probably also add json-mode and json-format as new Skewer dependencies and use them to nicely format the result buffer. It should also be tied into the existing skewer-eval-print-last-expression somehow.

[kostafey]

I've updated pull request according to your code. json-format is made very simple and straightforward, it's necessary when returned value contains objects. This cause error for https://github.com/gongo/json-reformat.

[kostafey]

@skeeto Could you merge this pull request, please?