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Backport commit 3236dedc2 from Emacs 

* lisp/ox.el (org-export-resolve-fuzzy-link): Before matching LINK,
pre-process and cache all the non-nil search cells in the parse tree.
When matching, use the pre-processed info.  Fix the :test function for
the cache hash table.

org-export-resolve-fuzyy-link: Pre-cache all possible search cells
3236dedc2de5975afde877f7460bd012da89a98d
Ihor Radchenko
Thu Jun 16 10:52:36 2022 +0300

[ km: This ported commit comes from main's 792cd4b0a.  I'm applying it
  here too for bookkeeping/traceability purposes.  ]
This commit is contained in:
Ihor Radchenko 2022-06-12 13:06:47 +08:00 committed by Kyle Meyer
parent 303c89350e
commit 07c5d066aa
1 changed files with 16 additions and 6 deletions
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@ -4348,17 +4348,27 @@ significant."
(let* ((search-cells (org-export-string-to-search-cell
(org-element-property :path link)))
(link-cache (or (plist-get info :resolve-fuzzy-link-cache)
(let ((table (make-hash-table :test #'eq)))
(let ((table (make-hash-table :test #'equal)))
;; Cache all the element search cells.
(org-element-map (plist-get info :parse-tree)
(append pseudo-types '(target) org-element-all-elements)
(lambda (datum)
(dolist (cell (org-export-search-cells datum))
(if (gethash cell table)
(push datum (gethash cell table))
(puthash cell (list datum) table)))))
(plist-put info :resolve-fuzzy-link-cache table)
table)))
(cached (gethash search-cells link-cache 'not-found)))
(if (not (eq cached 'not-found)) cached
(let ((matches
(org-element-map (plist-get info :parse-tree)
(append pseudo-types '(target) org-element-all-elements)
(lambda (datum)
(and (org-export-match-search-cell-p datum search-cells)
datum)))))
(let (result)
(dolist (search-cell search-cells)
(setq result
(nconc
result
(gethash search-cell link-cache))))
(delq nil result))))
(unless matches
(signal 'org-link-broken (list (org-element-property :path link))))
(puthash