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I'm trying to create a Helm source which matches the basename of files. I created a source which splits the basename of files in recentf list and puts the path behind it in parens (it uses the (DISPLAY . REAL) candidate format, so the real item is still available for opening the file.

I then added a :match attribute function which should match only the basename of the file when searching, but for some reason it still matches the path part.

Can someone tell me why?

(helm
 :sources
 (list
  (helm-build-sync-source
      "Recent Files Basenames"
    :candidates
    (lambda ()
      (mapcar (lambda (f)
                (cons (format
                       "%s (%s)"
                       (file-name-nondirectory f) f) f))
              recentf-list))

    :match (lambda (candidate)
             (string-match
              helm-pattern
              (substring candidate 0
                         (string-match "(" candidate))))

    :action '(("Find File" . find-file)))))
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You're missing :multimatch nil. You can also replace the match slot with:

:match-strict (lambda (candidate)
                (string-match helm-pattern
                              (helm-basename candidate)))

or

:match-part (lambda (candidate)
              (helm-basename candidate))
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2
  • Thanks, I tried the match-part version and it worked. What I don't understand is why :match didn't work. It is supposed to override the default matching, isn't it? – Tom Aug 13 '19 at 4:53
  • I don't think so. The multimatch option was probably adding additional matching functions, so you need to deactivate multimatch explicitly if you want only your match function to be used. – jagrg Aug 13 '19 at 13:12

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