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Re: dired and multi-occur

From: Andreas Politz
Subject: Re: dired and multi-occur
Date: Fri, 04 Dec 2009 19:21:29 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Dirk80 <address@hidden> writes:

> Hi,
> I would like to search a string through multiple files. I like multi-occur a
> lot. It would be great if it is possible to combine dired and multi-occur. I
> want that multi-occur is applied to all marked files.
> Let's say the name of the interactive function to do this is
> "my-dired-multi-occur". If the user invokes this function via M-x
> my-dired-multi-occur the user shall be asked for a search string. All marked
> files shall be searched via dired. If the file does not contain the
> search-string it shall be closed again.
> I tried to write a function doing this. But I'm an elisp newbie and don't
> get it.
> (defun my-dired-multi-occur (string)
>   "Search string in files marked in dired."
>   (interactive "MSearch-String:")
>   (require 'dired)
>   (multi-occur (mapc 'find-file (dired-get-marked-files)) string))

You need to use `mapcar'.

> I get the following result, when I'm invoking this function when I have
> opened dired and marked three files: M-x my-dired-multi-occur
> Search-String: init
> Searched 0 buffers (3 killed); no matches for `init'
> ---
> My problem seems to be that multi-occur is not getting a list of buffers.
> The other problem I have: How can I close all files which do not contain the
> search-string.

You can examine the occur buffer afterwards with `occur-next',
`occur-mode-find-occurrence', `marker-buffer' and `buffer-file-name'.

> Thank you very much for your help in advance.
> Dirk


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