(defcustom org-export-jekyll-md-project-directory default-directory
  "Directory to save exported articles to.
\nDefaults to `default-directory' (i.e. current directory). See
`org-export-jekyll-md-use-project-directory-and-prompt' if you
want to choose a directory on saving."
  :group 'org-export-jekyll
  :type 'string)

(defcustom org-export-jekyll-md-prompt-for-directory nil
  "Non-nil means prompt for a directory to save in.
\nStart at `org-export-jekyll-md-project-directory'. Nil means
use `org-export-jekyll-md-project-directory' with no prompt."
  :group 'org-export-jekyll
  :type 'boolean)

(defun org-jekyll-md-export-to-md (&optional async subtreep visible-only)
  "Export current buffer to a Markdown file adding some YAML front matter.
\nThe file is saved to `org-export-jekyll-md-project-directory'.
If `org-export-jekyll-md-prompt-for-directory' is non-nil, prompt
for a directory to save to."
  (interactive)
  (let* ((pub-dir (if org-export-jekyll-md-prompt-for-directory
                    (read-directory-name "Save to: "
                                         org-export-jekyll-md-project-directory
                                         nil
                                         t)
                    org-export-jekyll-md-project-directory))
         (outfile (concat pub-dir
                          (org-jekyll-md-filename-date)
                          (org-export-output-file-name ".md" subtreep))))
    (org-export-to-file 'jekyll outfile async subtreep visible-only)))