* nnir notmuch backend and the string-match function
@ 2013-11-27 20:26 Alexander Baier
2013-11-27 23:33 ` Alexander Baier
0 siblings, 1 reply; 5+ messages in thread
From: Alexander Baier @ 2013-11-27 20:26 UTC (permalink / raw)
To: ding
Hello,
I am currently trying to set up maildir search while using notmuch as a
nnir backend. So far, however, this has not been very successful.
Issuing a search using "G G" on a nnmaildir group presents me with the
following error message:
"Unknown header type nil while requesting articles of
group nnmaildir+gmail:gmail.Inbox"
So I started digging around in nnir.el and came across a very strange
bug I can't explain. In the function `nnir-compose-result' there is
the following expression:
#+begin_src emacs-lisp
(when (string-match (concat "^" prefix) dirnam)
(setq dirnam (replace-match "" t t dirnam)))
#+end_src
I stepped through this code with edebug and was very confused:
The value of dirnam is "/home/delexi/Mail/gmail/Inbox/cur/" and the value of
prefix is "/home/delexi/Mail/". To my surprise `string-match' did not
match anything! This of course leads to errors in the code following
this snippet. I tried this snippet in my scratch buffer and everything
worked fine (it matched the prefix correctly).
How is this possible? Is there something about string-match I am
missing? How is it possible, that this does not match anything?
#+begin_src emacs-lisp
(string-match "^/home/delexi/Mail/"
"/home/delexi/Mail/gmail/Inbox/cur/")
#+end_src
Thanks in advance,
--
Alexander Baier
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: nnir notmuch backend and the string-match function
2013-11-27 20:26 nnir notmuch backend and the string-match function Alexander Baier
@ 2013-11-27 23:33 ` Alexander Baier
2013-12-26 16:23 ` Lars Ingebrigtsen
0 siblings, 1 reply; 5+ messages in thread
From: Alexander Baier @ 2013-11-27 23:33 UTC (permalink / raw)
To: ding
Hello again,
On 13-11-27 21:26 Alexander Baier wrote:
> Hello,
>
> I am currently trying to set up maildir search while using notmuch as a
> nnir backend. So far, however, this has not been very successful.
>
> Issuing a search using "G G" on a nnmaildir group presents me with the
> following error message:
>
> "Unknown header type nil while requesting articles of
> group nnmaildir+gmail:gmail.Inbox"
>
> So I started digging around in nnir.el and came across a very strange
> bug I can't explain. In the function `nnir-compose-result' there is
> the following expression:
>
> #+begin_src emacs-lisp
> (when (string-match (concat "^" prefix) dirnam)
> (setq dirnam (replace-match "" t t dirnam)))
> #+end_src
>
> I stepped through this code with edebug and was very confused:
> The value of dirnam is "/home/delexi/Mail/gmail/Inbox/cur/" and the value of
> prefix is "/home/delexi/Mail/". To my surprise `string-match' did not
> match anything! This of course leads to errors in the code following
> this snippet. I tried this snippet in my scratch buffer and everything
> worked fine (it matched the prefix correctly).
>
> How is this possible? Is there something about string-match I am
> missing? How is it possible, that this does not match anything?
>
> #+begin_src emacs-lisp
> (string-match "^/home/delexi/Mail/"
> "/home/delexi/Mail/gmail/Inbox/cur/")
> #+end_src
>
> Thanks in advance,
I tested this a bit more and found out that edebug apparently alters
match-data in some way which in turn alters the programs execution
depending on whether I am currently debugging or not.
#+begin_src emacs-lisp
(when (string-match (concat "^" prefix) dirnam)
(message "%s" (match-data)) ;; this was added
(setq dirnam (replace-match "" t t dirnam)))
#+end_src
Executing the code with the modified piece above and without edebug
prints the right match-data. So this explains the weird matching
behavior. Is this a bug in edebug, or is this some unavoidable
restriction?
Regards,
--
Alexander Baier
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: nnir notmuch backend and the string-match function
2013-11-27 23:33 ` Alexander Baier
@ 2013-12-26 16:23 ` Lars Ingebrigtsen
2013-12-28 12:35 ` Alexander Baier
0 siblings, 1 reply; 5+ messages in thread
From: Lars Ingebrigtsen @ 2013-12-26 16:23 UTC (permalink / raw)
To: ding
Alexander Baier <lexi.baier@gmail.com> writes:
> Executing the code with the modified piece above and without edebug
> prints the right match-data. So this explains the weird matching
> behavior. Is this a bug in edebug, or is this some unavoidable
> restriction?
It sounds like a bug in edebug. I haven't seen edebug doing anything
like that -- it seems to work fine for me with stuff like that.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog http://lars.ingebrigtsen.no/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: nnir notmuch backend and the string-match function
2013-12-26 16:23 ` Lars Ingebrigtsen
@ 2013-12-28 12:35 ` Alexander Baier
2014-01-30 0:31 ` Lars Ingebrigtsen
0 siblings, 1 reply; 5+ messages in thread
From: Alexander Baier @ 2013-12-28 12:35 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: ding
On 2013-12-26 17:23 Lars Ingebrigtsen wrote:
> Alexander Baier <lexi.baier@gmail.com> writes:
>
>> Executing the code with the modified piece above and without edebug
>> prints the right match-data. So this explains the weird matching
>> behavior. Is this a bug in edebug, or is this some unavoidable
>> restriction?
>
> It sounds like a bug in edebug. I haven't seen edebug doing anything
> like that -- it seems to work fine for me with stuff like that.
I am still using Emacs 24.3, do you use the current trunk by any chance?
I might have been fixed there.
Regards,
--
Alexander Baier
^ permalink raw reply [flat|nested] 5+ messages in thread
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2013-11-27 20:26 nnir notmuch backend and the string-match function Alexander Baier
2013-11-27 23:33 ` Alexander Baier
2013-12-26 16:23 ` Lars Ingebrigtsen
2013-12-28 12:35 ` Alexander Baier
2014-01-30 0:31 ` Lars Ingebrigtsen
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