Re: "Anything" package requires w3m command...

[Sébastien Vauban]

Hi Elena,

Elena wrote:
> On Dec 20, 12:40 pm, Sébastien Vauban wrote:
>>
>> --8<---------------cut here---------------start------------->8---
>> Debugger entered--Lisp error: (error "Install w3m command in `exec-path' or 
>> set `w3m-command' variable correctly")
>>   signal(error ("Install w3m command in `exec-path' or set `w3m-command' 
>> variable correctly"))
>>   error("Install w3m command in `exec-path' or set `w3m-command' variable 
>> correctly")
>>   (progn (error "Install w3m command in `exec-path' or set `w3m-command' 
>> variable correctly"))
>>   (if (not (stringp w3m-command)) (progn (error "Install w3m command in 
>> `exec-path' or set `w3m-command' variable correctly")))
>>   (when (not (stringp w3m-command)) (error "Install w3m command in 
>> `exec-path' or set `w3m-command' variable correctly"))
>>   eval-buffer(#<buffer  *load*<3>> nil "c:/home/sva/src/emacs-w3m/w3m.el" 
>> nil t)  ; Reading at buffer position 11512
>>   load-with-code-conversion("c:/home/sva/src/emacs-w3m/w3m.el" 
>> "c:/home/sva/src/emacs-w3m/w3m.el" nil t)
>>   orig-require(w3m nil nil)
>>   (let ((my/require-depth ...)) (orig-require feature filename noerror))
>>   (cond ((member feature features) (message "%sRequiring `%s' (already 
>> loaded)" ... feature)) (t (message "%sRequiring `%s'" ... feature) (let ... 
>> ...) (message "%sRequiring `%s'...done" ... feature)))
>>   require(w3m)
>>   (...)
>>   require(anything-config)
>> --8<---------------cut here---------------end--------------->8---
>
> Yes, that's the same problem. I think a fix would be to add "emacs- w3m"
> directory only when "w3m-command" is defined and available, like this
> (snippet not tested, I'm busy right now):
>
> ;; Add emacs-w3m path to load-path only when w3m-command is available.
> (when w3m-command
>       (if (executable-find w3m-command)
>               (add-to-list 'load-path "/path/to/emacs-w3m")
>               (warn "Executable %s not found, emacs-w3m package not added to 
> load-
> path." w3m-command))

In my case, it is a bit different as the load-path is automatically computed
(recursive scan of all folders under the root one)...


>> Now, following Thierry's advice, I've git pull'ed `anything' just 10 min ago,
>> and tried to relaunch my Emacs.
>>
>> I now have a different error (maybe hiding the above one, from a previous
>> run):
>>
>> --8<---------------cut here---------------start------------->8---
>> Warning (initialization): An error occurred while loading 
>> `c:/home/sva/.emacs':
>>
>> error: No buffer named *anything*
>>
>> To ensure normal operation, you should investigate and remove the
>> cause of the error in your initialization file.  Start Emacs with
>> the `--debug-init' option to view a complete error backtrace.
>> --8<---------------cut here---------------end--------------->8---
>
> I've read something about this issue, but I don't remember what the fix was.
> If I'm not mistaken, creating "*anything*" buffer in advance fixed the
> issue. Sorry for not being able to provide definitive answers right now.

Maybe it'd be good that to be checked directly in the `anything' package?  The
assumption that such a buffer already exists is maybe too strong?  Or I do
something wrong so that the assumption gets broken?


>> PS2- My `require' is wrapped to output debug messages:
>
> This is a very useful snippet of code!  Thanks for sharing.

You're welcome. That's how we all can make progress...

Best regards,
  Seb

-- 
Sébastien Vauban