Fixing my old ambiguous sketch references

| blogging, 11ty, emacs

At some point during the conversion of my blog from Wordpress to 11ty, I wanted to change my sketch links to use a custom shortcode instead of referring to the sketch in my old wp-uploads directory. Because Wordpress changed the filenames a little, I used the ID at the start of the filename. I forgot that many of my filenames from 2013 to 2015 just had the date without a uniquely identifying letter or number suffix, so many old references were ambiguous and my static site generator just linked to the first matching file. When I was listening to my old monthly reviews as part of my upcoming 10-year review, I noticed the repeated links. So I wrote these functions to help me find and replace markup of the form sketchLink "2013-10-06" with sketchLink "2013-10-06 Daily drawing - thinking on paper #drawing", replacing references to the same date with the next sketch in the list. I figured that would be enough to get the basic use case sorted out (usually a list of sketches in my monthly/weekly reviews), taking advantage of the my-list-sketches function I defined in my Emacs config.

(defun my-replace-duplicate-sketch-list-references ()
  (goto-char (point-min))
  (let (seen)
    (while (re-search-forward "sketchLink \\\"\\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\\)\\\""
                              nil t)
      (if (assoc (match-string 1) seen)
          (setcdr (assoc (match-string 1) seen) (1+ (assoc-default (match-string 1) seen)))
        (setq seen (cons (cons (match-string 1) 1) seen))))
    (mapc (lambda (entry)
            (goto-char (point-min))
            (mapc (lambda (sketch)
                    (if (re-search-forward (format "sketchLink \\\"\\(%s\\)\\\""
                                                   (regexp-quote (car entry))) nil t)
                        (replace-match (save-match-data (file-name-sans-extension sketch))
                                       nil t nil 1)
                      (message "Skipping %s possible ref to %s"
                  (my-list-sketches (concat "^" (regexp-quote (car entry))) nil '("~/sync/sketches"))))

Sometimes I needed to delete the whole list and start again:

(defun my-insert-sketch-list-between (start-date end-date)
    (lambda (f)
      (format "<li>%s sketchLink \"%s\" %s</li>\n"
              (concat "{" "%")  ; avoid confusing 11ty when I export this
              (file-name-sans-extension f)
              (concat "%" "}")))
    (sort (seq-filter
           (lambda (f) (and (string< f end-date) (not (string< f start-date))))
           (my-list-sketches nil nil '("~/sync/sketches")))

I used find-grep-dired to search for sketchLink \"[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\" and then I just used a keyboard macro to process each file.

Anyway, really old monthly reviews like this one for October 2013 should mostly make sense again. I could probably pull out the correct references from the Wordpress database backup, but what I've got is probably okay. I would probably have gotten much grumpier trying to do this without Emacs Lisp. Yay Emacs!

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