GNU bug report logs - #25607
26.0.50; Ido does not work with tramp anymore

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Cédric Chépied <cedric.chepied <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.50; Ido does not work with tramp anymore
Date: Thu, 02 Feb 2017 14:58:39 +0100

emacs -Q
M-x ido-mode
C-x C-f
(Here ido completion works)
Press backspace until you only have 'Find file: /' as prompt
(Here completion still works)
Type sudo:root <at> localhost:/
(No completion)

It used to ask sudo password and then completion was working.

To make it work again, continue the recipe with this:
C-f
Enter the sudo password, you have completion but ido is disabled
C-g
C-x C-f
Press backspace until you only have 'Find file: /' as prompt
Type sudo:root <at> localhost:/
(Completion works)

The problem is exactly the same with /ssh:



In GNU Emacs 26.0.50.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars)
 of 2017-02-02 built on Aman
Repository revision: 7783d9fc71ffb46680ef0ba6d05ed8e5c191d2ef
Windowing system distributor 'The X.Org Foundation', version 11.0.11901000
Recent messages:
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Ispell process killed
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Undo!
GNU Emacs 26.0.50.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars) of 2017-02-02
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Message #8 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607 <at> debbugs.gnu.org
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Fri, 03 Feb 2017 15:34:07 +0100

Cédric Chépied <cedric.chepied <at> gmail.com> writes:

Hi Cédric,

> emacs -Q
> M-x ido-mode
> C-x C-f
> (Here ido completion works)
> Press backspace until you only have 'Find file: /' as prompt
> (Here completion still works)
> Type sudo:root <at> localhost:/
> (No completion)
>
> It used to ask sudo password and then completion was working.

Likely, the changed behaviour comes from my commit
6653bb45d3697c9372cc77773c49f52399740b51, fixing bug#24947.

Well, I'm not an ido user, so I could be wrong with my
fixes. admin/MAINTAINERS doesn't mention somebody who feels responsible
for ido. I would really appreciate if an ido afficionado chimes in.

Best regards, Michael.

Message #13 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Michael Albinus <michael.albinus <at> gmx.de>,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607 <at> debbugs.gnu.org
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Sat, 4 Feb 2017 02:41:06 +0200

Hi Michael,

On 03.02.2017 16:34, Michael Albinus wrote:
>> emacs -Q
>> M-x ido-mode
>> C-x C-f
>> (Here ido completion works)
>> Press backspace until you only have 'Find file: /' as prompt
>> (Here completion still works)
>> Type sudo:root <at> localhost:/
>> (No completion)
>>
>> It used to ask sudo password and then completion was working.
> 
> Likely, the changed behaviour comes from my commit
> 6653bb45d3697c9372cc77773c49f52399740b51, fixing bug#24947.

This commit may be going in the right direction, but do you know why 
even pressing TAB at the end of the offered scenario doesn't make Emacs 
ask for password?

The patch below makes Ido ask for password if I type TAB twice. But not 
after I do that once, which is puzzling. But maybe the function uses the 
completions already completed for the minibuffer, as a kind of optimization.

diff --git a/lisp/ido.el b/lisp/ido.el
index e18464d..2c773b0 100644
--- a/lisp/ido.el
+++ b/lisp/ido.el
@@ -2541,7 +2541,8 @@ ido-set-common-completion
 (defun ido-complete ()
   "Try and complete the current pattern amongst the file names."
   (interactive)
-  (let (res)
+  (let (non-essential
+        res)
     (cond
      (ido-incomplete-regexp
       ;; Do nothing

Message #16 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 25607 <at> debbugs.gnu.org,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Sun, 05 Feb 2017 12:13:34 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> Hi Michael,

Hi Dmitry,

>>> emacs -Q
>>> M-x ido-mode
>>> C-x C-f
>>> (Here ido completion works)
>>> Press backspace until you only have 'Find file: /' as prompt
>>> (Here completion still works)
>>> Type sudo:root <at> localhost:/
>>> (No completion)
>>>
>>> It used to ask sudo password and then completion was working.
>>
>> Likely, the changed behaviour comes from my commit
>> 6653bb45d3697c9372cc77773c49f52399740b51, fixing bug#24947.
>
> This commit may be going in the right direction, but do you know why
> even pressing TAB at the end of the offered scenario doesn't make
> Emacs ask for password?

It's a Tramp feature. When it is in `tramp-completion-mode'
(`non-essential' is an indicator for it), Tramp never opens a new
connection on its own. So it doesn't come to the point the remote end
asks for the password.

> The patch below makes Ido ask for password if I type TAB twice. But
> not after I do that once, which is puzzling. But maybe the function
> uses the completions already completed for the minibuffer, as a kind
> of optimization.

Well, but it still doesn't comlete "/sudo:" and alike.

I made a test with the emacs-25 branch; ido completion behaves
differently, when I use the Tramp libraries from the master branch
there. So looks like I must dig into Tramp for understanding the
differences.

Will do, but it might take time. I'm offline next days.

Best regards, Michael.

Message #19 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 6 Feb 2017 02:05:50 +0200

On 05.02.2017 13:13, Michael Albinus wrote:

>> This commit may be going in the right direction, but do you know why
>> even pressing TAB at the end of the offered scenario doesn't make
>> Emacs ask for password?
> 
> It's a Tramp feature. When it is in `tramp-completion-mode'
> (`non-essential' is an indicator for it),

Like discussed in 
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=23006#56, this doesn't 
make sense to me.

When the user presses C-M-i when typing a remote file name, they most 
likely want to be prompted password if the connection is not yet 
established. That is as opposed to "idle completion", as explained and 
discussed in https://github.com/company-mode/company-mode/issues/462

Based on that discussion, I though you'd improved that already somehow.

> Tramp never opens a new
> connection on its own. So it doesn't come to the point the remote end
> asks for the password.

I'm not sure what "on its own" means here. In some file name completion 
contexts, Emacs does ask for a password, and in some (like here, where 
it's arguably a bug), doesn't.

>> The patch below makes Ido ask for password if I type TAB twice. But
>> not after I do that once, which is puzzling. But maybe the function
>> uses the completions already completed for the minibuffer, as a kind
>> of optimization.
> 
> Well, but it still doesn't comlete "/sudo:" and alike.

It does offer some completions there, but doesn't ask for password until 
I type the slash after the colon. Which differs from the default 
behavior, indeed.

> I made a test with the emacs-25 branch; ido completion behaves
> differently, when I use the Tramp libraries from the master branch
> there. So looks like I must dig into Tramp for understanding the
> differences.
> 
> Will do, but it might take time. I'm offline next days.

Thank you.

Message #22 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 25607 <at> debbugs.gnu.org,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Sun, 12 Feb 2017 18:34:52 +0100

Michael Albinus <michael.albinus <at> gmx.de> writes:

Hi,

> I made a test with the emacs-25 branch; ido completion behaves
> differently, when I use the Tramp libraries from the master branch
> there. So looks like I must dig into Tramp for understanding the
> differences.
>
> Will do, but it might take time. I'm offline next days.

Finally, I've catched the bug. The major culprit is commit
a8be7c1ec40c9fab3407a0bc59e20141364e231f, which resulted in Tramp not
cooperating well with ido.el until tramp.el itself was loaded. It's an
autoload issue. There were other problems too, for example with commit
97776f295d652aff97be91431ad53db5618ad2a2 and its new function
`tramp-completion-handle-expand-file-name'. All of the changes are from
May 2016.

I hope I've fixed this now; I would be happy if somebody could
crosscheck. Likely, a bootstrapped version of Emacs is needed, due to
the changed loaddefs.el.

Best regards, Michael.

Message #25 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 13:13:16 +0200

Hi Michael,

On 12.02.2017 19:34, Michael Albinus wrote:

> Finally, I've catched the bug. The major culprit is commit
> a8be7c1ec40c9fab3407a0bc59e20141364e231f, which resulted in Tramp not
> cooperating well with ido.el until tramp.el itself was loaded. It's an
> autoload issue. There were other problems too, for example with commit
> 97776f295d652aff97be91431ad53db5618ad2a2 and its new function
> `tramp-completion-handle-expand-file-name'. All of the changes are from
> May 2016.
> 
> I hope I've fixed this now; I would be happy if somebody could
> crosscheck. Likely, a bootstrapped version of Emacs is needed, due to
> the changed loaddefs.el.

Please clarify what is it exactly that is supposed to be fixed.

I still need to apply my patch to see the password prompt, and I still 
need to press TAB twice to get there.

Message #28 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Cédric Chépied <cedric.chepied <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org,
 Cédric Chépied <cedric.chepied <at> gmail.com>,
 Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 13:00:36 +0100

Hi,

On Sun, 12 Feb 2017 18:34:52 +0100,
Michael Albinus wrote:
> Finally, I've catched the bug. The major culprit is commit
> a8be7c1ec40c9fab3407a0bc59e20141364e231f, which resulted in Tramp not
> cooperating well with ido.el until tramp.el itself was loaded. It's an
> autoload issue. There were other problems too, for example with commit
> 97776f295d652aff97be91431ad53db5618ad2a2 and its new function
> `tramp-completion-handle-expand-file-name'. All of the changes are from
> May 2016.

Yes, I saw this bug a long time ago but was hopping it would be automagically
fixed.


> I hope I've fixed this now; I would be happy if somebody could
> crosscheck. Likely, a bootstrapped version of Emacs is needed, due to
> the changed loaddefs.el.

I've just rebuilt the master branch and still see the bug with the same recipe
:-/

Regards,
-- 
Cédric Chépied
<cedric.chepied <at> gmail.com>

Message #31 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 13:45:46 +0100

Cédric Chépied <cedric.chepied <at> gmail.com> writes:

> Hi,

Hi Cédric,

>> I hope I've fixed this now; I would be happy if somebody could
>> crosscheck. Likely, a bootstrapped version of Emacs is needed, due to
>> the changed loaddefs.el.
>
> I've just rebuilt the master branch and still see the bug with the same recipe
> :-/

Did you bootstrap?

> Regards,

Best regards, Michael.

Message #34 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Cédric Chépied <cedric.chepied <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 13:51:44 +0100

On Mon, 13 Feb 2017 13:45:46 +0100,
Michael Albinus wrote:
> Did you bootstrap?

I made a new clone.

Regards,
-- 
Cédric Chépied
<cedric.chepied <at> gmail.com>

Message #37 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 13:52:52 +0100

Michael Albinus <michael.albinus <at> gmx.de> writes:

Hi Cédric,

>>> I hope I've fixed this now; I would be happy if somebody could
>>> crosscheck. Likely, a bootstrapped version of Emacs is needed, due to
>>> the changed loaddefs.el.
>>
>> I've just rebuilt the master branch and still see the bug with the same recipe
>> :-/
>
> Did you bootstrap?

Forget this. I've fixed the problem that method, user and host names
were not completed. There's still the problem that sudo:root <at> localhost:/
does not complete. Will continue to work.

>> Regards,

Best regards, Michael.

Message #40 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Cédric Chépied <cedric.chepied <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 13:59:36 +0100

On Mon, 13 Feb 2017 13:52:52 +0100,
Michael Albinus wrote:
> Will continue to work.

Thanks a lot.

Regards,
-- 
Cédric Chépied
<cedric.chepied <at> gmail.com>

Message #43 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 25607 <at> debbugs.gnu.org,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 13 Feb 2017 14:04:23 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> Hi Michael,

Hi Dmitry,

>> I hope I've fixed this now; I would be happy if somebody could
>> crosscheck. Likely, a bootstrapped version of Emacs is needed, due to
>> the changed loaddefs.el.
>
> Please clarify what is it exactly that is supposed to be fixed.

As said in my other email, I've solved only missing method, user and
host name completion. Blowsy test from me :-(

> I still need to apply my patch to see the password prompt, and I still
> need to press TAB twice to get there.

I'll continue.

Best regards, Michael.

Message #46 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Wed, 15 Feb 2017 19:55:17 +0100

Michael Albinus <michael.albinus <at> gmx.de> writes:

Hi Cédric,

> Forget this. I've fixed the problem that method, user and host names
> were not completed. There's still the problem that sudo:root <at> localhost:/
> does not complete. Will continue to work.

I've committed another patch which shall improve the situation. Beside
two changes in ido.el, I've removed some old compat code in Tramp, which
was in the way.

Password is requested now after reaching "/sudo:root <at> localhost:", it
needs two <TAB>, as Dmitry also said. Don't know why two <TAB> are
needed, but it seems to be an ido feature. I've traced Tramp, and after
the first <TAB> no Tramp function was invoked. Maybe we can live with this.

Feedback welcome. Bootstrapping Emacs might still be needed, 'cause I've
changed the autoloads, again.

Best regards, Michael.

Message #49 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Cédric Chépied <cedric.chepied <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Fri, 17 Feb 2017 09:02:58 +0100

Hi Michael,

On Wed, 15 Feb 2017 19:55:17 +0100,
Michael Albinus wrote:
> Password is requested now after reaching "/sudo:root <at> localhost:", it
> needs two <TAB>, as Dmitry also said. Don't know why two <TAB> are
> needed, but it seems to be an ido feature. I've traced Tramp, and after
> the first <TAB> no Tramp function was invoked. Maybe we can live with this.

It works here. That's really better. There is still a strange behaviour: If your
type "/sudo:root <at> localhost:/" (with the '/' at the end) the ido completion does
not work for the first directory (/home for example). Then it works.

With "/sudo:root <at> localhost: <TAB> <TAB> /" it works great.
Thanks a lot, I use tramp really often and this bug was very annoying.

Best regards,
-- 
Cédric Chépied
<cedric.chepied <at> gmail.com>

Message #52 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Sat, 18 Feb 2017 14:38:25 +0100

Cédric Chépied <cedric.chepied <at> gmail.com> writes:

> Hi Michael,

Hi Cédric,

> There is still a strange
> behaviour: If your type "/sudo:root <at> localhost:/" (with the '/' at the
> end) the ido completion does not work for the first directory (/home
> for example). Then it works.

I've pushed a patch to the repository which shall fix this.

> Best regards,

Best regards, Michael.

Message #55 received at 25607 <at> debbugs.gnu.org (full text, mbox):

From: Cédric Chépied <cedric.chepied <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 25607 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>,
 Cédric Chépied <cedric.chepied <at> gmail.com>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 20 Feb 2017 09:34:57 +0100

Hi Michael,

On Sat, 18 Feb 2017 14:38:25 +0100,
Michael Albinus wrote:
> 
> Cédric Chépied <cedric.chepied <at> gmail.com> writes:
> > There is still a strange
> > behaviour: If your type "/sudo:root <at> localhost:/" (with the '/' at the
> > end) the ido completion does not work for the first directory (/home
> > for example). Then it works.
> 
> I've pushed a patch to the repository which shall fix this.

That's perfect. Now completion works fine and start immediately after typing '/',
no need to press <tab> anymore. Thank you very much.

Regards,
-- 
Cédric Chépied
<cedric.chepied <at> gmail.com>

Message #60 received at 25607-done <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Cédric Chépied <cedric.chepied <at> gmail.com>
Cc: 25607-done <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#25607: 26.0.50; Ido does not work with tramp anymore
Date: Mon, 20 Feb 2017 09:40:48 +0100

Cédric Chépied <cedric.chepied <at> gmail.com> writes:

> Hi Michael,

Hi Cédric,

>> I've pushed a patch to the repository which shall fix this.
>
> That's perfect. Now completion works fine and start immediately after
> typing '/',
> no need to press <tab> anymore. Thank you very much.

Thanks for confirmation, I'm closing the bug.

> Regards,

Best regards, Michael.

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