Org Capture Setup

If you do not want to manually type the EXPORT_FILE_NAME for each new post, here is an example Org Capture template can help:

;; Populates only the EXPORT_FILE_NAME property in the inserted headline.
(with-eval-after-load 'org-capture
  (defun org-hugo-new-subtree-post-capture-template ()
    "Returns `org-capture' template string for new Hugo post.
See `org-capture-templates' for more information."
    (let* ((title (read-from-minibuffer "Post Title: ")) ;Prompt to enter the post title
           (fname (org-hugo-slug title)))
      (mapconcat #'identity
                 `(
                   ,(concat "* TODO " title)
                   ":PROPERTIES:"
                   ,(concat ":EXPORT_FILE_NAME: " fname)
                   ":END:"
                   "%?\n")          ;Place the cursor here finally
                 "\n")))

  (add-to-list 'org-capture-templates
               '("h"                ;`org-capture' binding + h
                 "Hugo post"
                 entry
                 ;; It is assumed that below file is present in `org-directory'
                 ;; and that it has a "Blog Ideas" heading. It can even be a
                 ;; symlink pointing to the actual location of all-posts.org!
                 (file+olp "all-posts.org" "Blog Ideas")
                 (function org-hugo-new-subtree-post-capture-template))))

Above capture will auto-insert a heading prefixed with TODO. With org-log-done set to 'time, on changing the TODO state to the DONE state (C-c C-t), a Special Property called CLOSED will be auto-inserted below the heading. Below is an example.

*** DONE Narrowing the Author column in Magit                       :org:log:
CLOSED: [2017-12-18 Mon 16:36]

ox-hugo auto-sets the date field in the front-matter to the time stamp in that CLOSED property.

Alternative way to set the date field #

If you prefer to not insert time-stamps when switching to the DONE state (i.e. you have org-log-done at its default value of nil), you can explicitly insert the EXPORT_DATE property too using the below Org Capture template instead.

;; Populates both EXPORT_FILE_NAME and EXPORT_DATE properties in the inserted
;; headline.
(with-eval-after-load 'org-capture
  (defun org-hugo-new-subtree-post-capture-template ()
    "Returns `org-capture' template string for new Hugo post.
See `org-capture-templates' for more information."
    (let* (;; http://www.holgerschurig.de/en/emacs-blog-from-org-to-hugo/
           (date (format-time-string (org-time-stamp-format :long :inactive) (org-current-time)))
           (title (read-from-minibuffer "Post Title: ")) ;Prompt to enter the post title
           (fname (org-hugo-slug title)))
      (mapconcat #'identity
                 `(
                   ,(concat "* TODO " title)
                   ":PROPERTIES:"
                   ,(concat ":EXPORT_FILE_NAME: " fname)
                   ,(concat ":EXPORT_DATE: " date) ;Enter current date and time
                   ":END:"
                   "%?\n")          ;Place the cursor here finally
                 "\n")))

  (add-to-list 'org-capture-templates
               '("h"                ;`org-capture' binding + h
                 "Hugo post"
                 entry
                 ;; It is assumed that below file is present in `org-directory'
                 ;; and that it has a "Blog Ideas" heading. It can even be a
                 ;; symlink pointing to the actual location of all-posts.org!
                 (file+olp "all-posts.org" "Blog Ideas")
                 (function org-hugo-new-subtree-post-capture-template))))