Quick hack to populate tide-format-options using .vscode/settings.json for formatting

.dir-locals.el

((nil . ((eval . (progn
  (make-local-variable 'tide-format-options)
  (setq tide-format-options (dmaz-parse-vscode-formatting (dmaz-joindirs (dmaz-find-dirlocals-dir) ".vscode" "settings.json"))))))))

init.el

(defun dmaz-joindirs (root &rest dirs)
  "Joins a series of directories together, like Python's os.path.join,
  (dmaz-joindirs \"/tmp\" \"a\" \"b\" \"c\") => /tmp/a/b/c"
  (if (not dirs)
      root
    (apply 'dmaz-joindirs
           (expand-file-name (car dirs) root)
           (cdr dirs))))

(defun dmaz-find-dirlocals-dir ()
  "Finds directory where closest .dir-locals file is located"
  (file-name-directory
   (let ((d (dir-locals-find-file ".")))
     (if (stringp d) d (car d)))))

(defun dmaz-parse-vscode-formatting (f)
  "Parses `f' as .vscode/settings.json to get formatting options suitable for `tide-format-options',
  (setq tide-format-options (dmaz-parse-vscode-formatting \".vscode/settings.json\"))"
  (require 'cl)
  (let* ((file-contents (with-temp-buffer
			  (insert-file-contents f)
			  (buffer-substring-no-properties
			   (point-min)
			   (point-max))))
	 (string-list (split-string file-contents "\n" t))
	 (filtered-list (remove-if-not #'(lambda (s)
					   (string-match ".*\"javascript\\.format\\.\\(.*\\)\": \\([a-z]*\\)" s))
				       string-list))
	 (values-list (mapcan #'(lambda (s) 
				  (string-match ".*\"javascript\\.format\\.\\(.*\\)\": \\([a-z]*\\)" s)
				  (let ((name (match-string 1 s))
					(value (if (equal (match-string 2 s) "true") t nil)))
				    `(,(intern (concat ":" name)) ,value))
				  ) filtered-list)))
    values-list))