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From: Michael Heerdegen <michael_heerdegen@web.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Prompt for files with given extensions
Date: Wed, 11 Feb 2015 16:35:53 +0100	[thread overview]
Message-ID: <878ug4mpeu.fsf@web.de> (raw)
In-Reply-To: CALhoy233rv6b4P+Cnzx2PZTyFuC-SEQdL5u2JTHjbcMq3695sA@mail.gmail.com

Robin Neatherway <robin.neatherway@gmail.com> writes:

> At the moment I use `read-file-name` with `foo.results` as a default,
> but I would like to filter the possible completions by file extension.
> Is this possible?

You can just use the PREDICATE arg of `read-file-name' for that:

--8<---------------cut here---------------start------------->8---
;; -*- lexical-binding: t -*-

(defun my-filter-file-by-extension (extension)
  (lambda (file) (let ((file-extension (file-name-extension file)))
              (and (stringp file-extension)
                   (string= file-extension extension)))))

;; Use like this:
(read-file-name
 "File: " "~/" nil t nil
 (my-filter-file-by-extension "txt"))

--8<---------------cut here---------------end--------------->8---


Michael.




  parent reply	other threads:[~2015-02-11 15:35 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-11 10:17 Prompt for files with given extensions Robin Neatherway
2015-02-11 15:00 ` Drew Adams
2015-02-11 15:35 ` Michael Heerdegen [this message]
2015-02-16 10:47   ` Robin Neatherway
2015-02-12  2:41 ` Robert Thorpe

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