emacs 22.3.1 igrep issue

emacs 22.3.1 igrep issue

[Kenneth Goldman]

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With a new Windows platform, I'm trying to update emacs from 20.6 to
22.3.1.

I have to get igrep working.  I use it constantly.  I see this error.  I
can stay
on 20.6, but it seems like a good time to upgrade if I can get everything
working.

1 - The first few lines of output look like this, which means I can't
immediately start
stepping through.  I have to click on the igrep frame first.

-*- mode: igrep; default-directory: "f:/emacs/" -*-
Igrep started at Tue Mar 23 15:33:32

grep -n -i -e copy f:/emacs/*.el NUL
... and then the matches ...

--
Ken Goldman   kgold@watson.ibm.com
914-784-7646 (863-7646)

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Re: emacs 22.3.1 igrep issue

[Lennart Borgman]

On Tue, Mar 23, 2010 at 8:50 PM, Kenneth Goldman <kgoldman@us.ibm.com> wrote:
> With a new Windows platform, I'm trying to update emacs from 20.6 to 22.3.1.

Why are you not upgrading to Emacs 23?

> I have to get igrep working. I use it constantly.

What does it do that lgrep and rgrep does not do?

> I see this error. I can
> stay
> on 20.6, but it seems like a good time to upgrade if I can get everything
> working.
>
> 1 - The first few lines of output look like this, which means I can't
> immediately start
> stepping through. I have to click on the igrep frame first.

I can't understand what you mean. What did you expect?

> -*- mode: igrep; default-directory: "f:/emacs/" -*-
> Igrep started at Tue Mar 23 15:33:32
>
> grep -n -i -e copy f:/emacs/*.el NUL
> ... and then the matches ...
>
> --
> Ken Goldman kgold@watson.ibm.com
> 914-784-7646 (863-7646)
>

Re: emacs 22.3.1 igrep issue

[Kenneth Goldman]

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Lennart Borgman <lennart.borgman@gmail.com> wrote on 03/23/2010 05:49:54
PM:

> > I have to get igrep working. I use it constantly.
>
> What does it do that lgrep and rgrep does not do?

I don't know lgrep and rgrep.  I installed igrep years ago.  Are those
better?  Basically, I put the cursor over a word and hit a keystroke,
it creates an *igrep* windows, searching for that word.  Then I can I
can use next-error to step through the matches.

> > I see this error. I can
> > stay
> > on 20.6, but it seems like a good time to upgrade if I can get
everything
> > working.
> >
> > 1 - The first few lines of output look like this, which means I can't
> > immediately start
> > stepping through. I have to click on the igrep frame first.
>
> I can't understand what you mean. What did you expect?

Those 3 lines (the ones with the mode, the date, and the blank)
confuse next-error.

>
> > -*- mode: igrep; default-directory: "f:/emacs/" -*-
> > Igrep started at Tue Mar 23 15:33:32
> >
> > grep -n -i -e copy f:/emacs/*.el NUL
> > ... and then the matches ...

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Re: emacs 22.3.1 igrep issue

[Lennart Borgman]

On Wed, Mar 24, 2010 at 2:32 AM, Kenneth Goldman <kgoldman@us.ibm.com> wrote:
>
> I don't know lgrep and rgrep.  I installed igrep years ago.  Are those
> better?

They come with Emacs and are maintained.

> Basically, I put the cursor over a word and hit a keystroke,
> it creates an *igrep* windows, searching for that word.  Then I can I
> can use next-error to step through the matches.

That should work with lgrep and rgrep.

Re: emacs 22.3.1 igrep issue

[Kevin Rodgers]

Kenneth Goldman wrote:
> Lennart Borgman <lennart.borgman@gmail.com> wrote on 03/23/2010 05:49:54 PM:
...
>  > > 1 - The first few lines of output look like this, which means I can't
>  > > immediately start
>  > > stepping through. I have to click on the igrep frame first.
>  >
>  > I can't understand what you mean. What did you expect?
> 
> Those 3 lines (the ones with the mode, the date, and the blank)
> confuse next-error.
> 
>  >
>  > > -*- mode: igrep; default-directory: "f:/emacs/" -*-
>  > > Igrep started at Tue Mar 23 15:33:32
>  > >
>  > > grep -n -i -e copy f:/emacs/*.el NUL
>  > > ... and then the matches ...

Ah, I see the same thing in 22.3.  For some reason, Emacs identifies the
"Igrep started at ..." line as a grep hit:

There are text properties here:
   face                 (compilation-info underline)
   help-echo            "mouse-2: visit this file and line"
   keymap               compilation-button-map
   message              [Show]
   mouse-face           highlight

Here's where igrep hands over control to Emacs:

     (if (fboundp 'compilation-start)    ; Emacs 22
         (let ((compilation-process-setup-function 'grep-process-setup))
           (or (fboundp 'igrep-mode)
               (define-derived-mode igrep-mode grep-mode "Igrep"))
           (compilation-start command
                              'igrep-mode
                              nil
                              (cond ((eq compilation-highlight-regexp t))
                                    (compilation-highlight-regexp
                                     (if (eq program "fgrep")
                                         (regexp-quote regex)
                                       regex)))))
       (compile-internal command (format "No more %s matches" program)
                         "Igrep" nil grep-regexp-alist))
-- 
Kevin Rodgers
Denver, Colorado, USA

Re: emacs 22.3.1 igrep issue

[Richard Riley]

Kenneth Goldman <kgoldman@us.ibm.com> writes:

> Lennart Borgman <lennart.borgman@gmail.com> wrote on 03/23/2010 05:49:54 PM:
>
>> > I have to get igrep working. I use it constantly.
>>
>> What does it do that lgrep and rgrep does not do?
>
> I don't know lgrep and rgrep.  I installed igrep years ago.  Are those
> better?  Basically, I put the cursor over a word and hit a keystroke,
> it creates an *igrep* windows, searching for that word.  Then I can I
> can use next-error to step through the matches.
>

This is the same as with lgrep and rgrep. You can then use the next
error functionality to move from hit to hit. Both built in and
supported.

,----
| next-error is an interactive compiled Lisp function in `simple.el'.
`----

I wonder also why bother moving to emacs 22 when emacs 23 is released
and stable? It nothing else it has much better font handling ;)

Re: emacs 22.3.1 igrep issue

[Kevin Rodgers]

Kenneth Goldman wrote:
> With a new Windows platform, I'm trying to update emacs from 20.6 to 22.3.1.
> 
> I have to get igrep working. I use it constantly. I see this error. I 
> can stay
> on 20.6, but it seems like a good time to upgrade if I can get 
> everything working.

Hi Ken, I'm the author of igrep.  But I stopped maintaining it back in 2005.

> 1 - The first few lines of output look like this, which means I can't 
> immediately start
> stepping through. I have to click on the igrep frame first.

igrep was just an interface to Emacs' compile:

       (compile-internal command (format "No more %s matches" program)
                         "Igrep" nil grep-regexp-alist)

So if the *igrep* buffer isn't selected, that's because of Emacs itself.

If you have an *igrep* frame, I think you must have frobbed
special-display-buffer-names (or similar customization).

Also, note that you don't _have_ to select the *igrep* buffer to visit
the matches: C-x ` (M-x next-error) works from any buffer.

> -*- mode: igrep; default-directory: "f:/emacs/" -*-
> Igrep started at Tue Mar 23 15:33:32
> 
> grep -n -i -e copy f:/emacs/*.el NUL
> ... and then the matches ...

-- 
Kevin Rodgers
Denver, Colorado, USA