How to search through all buffers?

How to search through all buffers?

[Eric Hanchrow]

I'd like to find all the occurrences of a particular word in all my
Emacs buffers, but cannot think of a way to do it short of writing my
own Elisp.  Is there in fact a way?

I'm surprised that I haven't found out how to do this through the
manual, or http://www.emacswiki.org.

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Re: How to search through all buffers?

[John Paul Wallington]

Eric Hanchrow <offby1@blarg.net> wrote:

> I'd like to find all the occurrences of a particular word in all my
> Emacs buffers, but cannot think of a way to do it short of writing my
> own Elisp.  Is there in fact a way?

With Emacs CVS HEAD (which you appear to be using) you can mark your
buffers in Ibuffer then press O.  Or use the `multi-occur' or
`multi-occur-by-filename-regexp' commands.  If the interactivity is
tiresome, how about something like this (lightly tested):

(defun hanchrow-all-encompassing-occur (regexp &optional hidden-bufs-too)
  "Show all lines in all visible buffers containing a match for REGEXP.
With prefix arg HIDDEN-BUFS-TOO, show lines matching in all buffers."
  (interactive (occur-read-primary-args))
  (if (interactive-p)
      (setq hidden-bufs-too current-prefix-arg))
  (multi-occur (if hidden-bufs-too
		   (buffer-list)
		 (delq nil
		       (mapcar (lambda (buf)
				 (unless (string-match "^ " (buffer-name buf))
				   buf))
			       (buffer-list))))
	       regexp))

Re: How to search through all buffers?

[John Paul Wallington]

I misread `occur-read-primary-args'; this is cleaner:

(defun hanchrow-all-encompassing-occur (regexp &optional hidden-bufs-too)
  "Show all lines in all visible buffers containing a match for REGEXP.
With prefix arg HIDDEN-BUFS-TOO, show lines matching in all buffers."
  (interactive (occur-read-primary-args))
  (multi-occur (if hidden-bufs-too
		   (buffer-list)
		 (delq nil
		       (mapcar (lambda (buf)
				 (unless (string-match "^ " (buffer-name buf))
				   buf))
			       (buffer-list))))
	       regexp))

Re: How to search through all buffers?

[John Russell]

John Paul Wallington <jpw@gnu.org> writes:

> I misread `occur-read-primary-args'; this is cleaner:
> 
> (defun hanchrow-all-encompassing-occur (regexp &optional hidden-bufs-too)
>   "Show all lines in all visible buffers containing a match for REGEXP.
> With prefix arg HIDDEN-BUFS-TOO, show lines matching in all buffers."
>   (interactive (occur-read-primary-args))
>   (multi-occur (if hidden-bufs-too
> 		   (buffer-list)
> 		 (delq nil
> 		       (mapcar (lambda (buf)
> 				 (unless (string-match "^ " (buffer-name buf))
> 				   buf))
> 			       (buffer-list))))
> 	       regexp))

Wow, and I had never even heard of occur before.  This function is
great. Thanks. 

Re: How to search through all buffers?

[Kevin Rodgers]

Eric Hanchrow wrote:

> I'd like to find all the occurrences of a particular word in all my
> Emacs buffers, but cannot think of a way to do it short of writing my
> own Elisp.  Is there in fact a way?

<plug type=shameless>

igrep-visited-files: an interactive compiled Lisp function in `igrep'.
(igrep-visited-files PROGRAM EXPRESSION &optional OPTIONS)

*Run `grep` PROGRAM to match EXPRESSION (with optional OPTIONS) on all visited 
files.
See `M-x igrep'.
</plug>


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