GNU bug report logs - #76974
31.0.50; [wishlist] Add global key binding for tramp-revert-buffer-with-sudo

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

From: Michael Albinus <michael.albinus <at> gmx.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 09:27:50 +0100

tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
give it a global key binding 'C-x @'. With this binding, it is more
simple to revert the current buffer to visit with "sudo"
permissions. This is useful for buffers visiting a file, or for dired
buffers.

A further optional, slightly related, change would be to bind '@' in
dired buffers with a function which opens the dired entry via
tramp-file-name-with-sudo. This opens the respective file or directory
with "sudo" permissions, even if the visited dired buffer doesn't have
these permissions.

I haven't assembled a patch yet, because I'd like to get comments first
about the acceptance of such a change.

Best regards, Michael.


In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.43, cairo version 1.18.2) of 2025-02-19 built on gandalf
Repository revision: ec34bccfee68a521e7a98ce8dce9325a146d095b
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12401006
System Description: Fedora Linux 41 (Workstation Edition)

Configured using:
 'configure --without-tree-sitter'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LIBOTF LIBSELINUX LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS
WEBP X11 XDBE XIM XINERAMA XINPUT2 XPM XRANDR GTK3 ZLIB

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Message #8 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Stephen Berman <stephen.berman <at> gmx.net>
To: Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of
 text editors" <bug-gnu-emacs <at> gnu.org>
Cc: Michael Albinus <michael.albinus <at> gmx.de>, 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 09:50:43 +0100

On Wed, 12 Mar 2025 09:27:50 +0100 Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org> wrote:

> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
> give it a global key binding 'C-x @'. With this binding, it is more
> simple to revert the current buffer to visit with "sudo"
> permissions. This is useful for buffers visiting a file, or for dired
> buffers.

`C-x @' is the prefix for the `event-apply-*-modifier' functions in the
globally accessible function-key-map.

Steve Berman

Message #14 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 10:14:27 +0100

Stephen Berman <stephen.berman <at> gmx.net> writes:

Hi Steve,

>> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
>> give it a global key binding 'C-x @'. With this binding, it is more
>> simple to revert the current buffer to visit with "sudo"
>> permissions. This is useful for buffers visiting a file, or for dired
>> buffers.
>
> `C-x @' is the prefix for the `event-apply-*-modifier' functions in the
> globally accessible function-key-map.

That's unfortune. What about 'C-x |'? Worse mnemonic, but it is related
to Tramp's multi-hop syntax.

> Steve Berman

Best regards, Michael.

Message #17 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Stephen Berman <stephen.berman <at> gmx.net>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 10:27:54 +0100

On Wed, 12 Mar 2025 10:14:27 +0100 Michael Albinus <michael.albinus <at> gmx.de> wrote:

> Stephen Berman <stephen.berman <at> gmx.net> writes:
>
> Hi Steve,
>
>>> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
>>> give it a global key binding 'C-x @'. With this binding, it is more
>>> simple to revert the current buffer to visit with "sudo"
>>> permissions. This is useful for buffers visiting a file, or for dired
>>> buffers.
>>
>> `C-x @' is the prefix for the `event-apply-*-modifier' functions in the
>> globally accessible function-key-map.
>
> That's unfortune. What about 'C-x |'? Worse mnemonic, but it is related
> to Tramp's multi-hop syntax.

`C-x |' is globally unbound AFAICS.  Another available key combination
is `C-c @', unless '@' counts as a letter (info "(elisp) Key Binding
Conventions").  (On e.g. German keyboards '|' and '@' are not the easiest
keys to type, but that's probably not a decisive criterion.)

Steve Berman

Message #20 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 10:37:02 +0100

Stephen Berman <stephen.berman <at> gmx.net> writes:

Hi Steve,

>>>> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
>>>> give it a global key binding 'C-x @'. With this binding, it is more
>>>> simple to revert the current buffer to visit with "sudo"
>>>> permissions. This is useful for buffers visiting a file, or for dired
>>>> buffers.
>>>
>>> `C-x @' is the prefix for the `event-apply-*-modifier' functions in the
>>> globally accessible function-key-map.
>>
>> That's unfortune. What about 'C-x |'? Worse mnemonic, but it is related
>> to Tramp's multi-hop syntax.
>
> `C-x |' is globally unbound AFAICS.  Another available key combination
> is `C-c @', unless '@' counts as a letter (info "(elisp) Key Binding
> Conventions").  (On e.g. German keyboards '|' and '@' are not the easiest
> keys to type, but that's probably not a decisive criterion.)

I'm open to any alternative. I've proposed the 'C-x' keymap due to its
similarity to 'C-x C-f', 'C-x C-v' and 'C-x d'.

> Steve Berman

Best regards, Michael.

Message #23 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Daniel Colascione <dancol <at> dancol.org>
To: Stephen Berman <stephen.berman <at> gmx.net>,
 "Stephen Berman via Bug reports for GNU Emacs,
 the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>, 
 76974 <at> debbugs.gnu.org
Cc: michael.albinus <at> gmx.de
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 02:43:18 -0700

On March 12, 2025 1:50:43 AM PDT, "Stephen Berman via Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org> wrote:
>On Wed, 12 Mar 2025 09:27:50 +0100 Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org> wrote:
>
>> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
>> give it a global key binding 'C-x @'. With this binding, it is more
>> simple to revert the current buffer to visit with "sudo"
>> permissions. This is useful for buffers visiting a file, or for dired
>> buffers.
>
>`C-x @' is the prefix for the `event-apply-*-modifier' functions in the
>globally accessible function-key-map.


This prefix binding is sitting on some pretty valuable real estate --- not as valuable as C-o, granted, but still. Is the modifier prefix feature justifying its squatting on this binding? I don't think I've ever used it on purpose, and keyboards with missing essential modifiers are a rarity. Seems like a niche feature to enable with a mode or something.

That said, does the sudo feature (which is great and sorely needed) need such a prominent keybinding? Might M-x sudo be sufficient? People type s u d o in the terminal all the time.

Message #29 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Daniel Colascione <dancol <at> dancol.org>
Cc: stephen.berman <at> gmx.net, michael.albinus <at> gmx.de, 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 10:58:04 +0100

>>>>> On Wed, 12 Mar 2025 02:43:18 -0700, Daniel Colascione <dancol <at> dancol.org> said:

    Daniel> On March 12, 2025 1:50:43 AM PDT, "Stephen Berman via Bug reports for
    Daniel> GNU Emacs, the Swiss army knife of text editors"
    Daniel> <bug-gnu-emacs <at> gnu.org> wrote:
    >> On Wed, 12 Mar 2025 09:27:50 +0100 Michael Albinus via "Bug reports
    >> for GNU Emacs, the Swiss army knife of text editors"
    >> <bug-gnu-emacs <at> gnu.org> wrote:
    >> 
    >>> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I propose to
    >>> give it a global key binding 'C-x @'. With this binding, it is more
    >>> simple to revert the current buffer to visit with "sudo"
    >>> permissions. This is useful for buffers visiting a file, or for dired
    >>> buffers.
    >> 
    >> `C-x @' is the prefix for the `event-apply-*-modifier' functions in the
    >> globally accessible function-key-map.


    Daniel> This prefix binding is sitting on some pretty valuable real estate ---
    Daniel> not as valuable as C-o, granted, but still. Is the modifier prefix
    Daniel> feature justifying its squatting on this binding? I don't think I've
    Daniel> ever used it on purpose, and keyboards with missing essential
    Daniel> modifiers are a rarity. Seems like a niche feature to enable with a
    Daniel> mode or something.

Itʼs one of those things that are useless until you need it, and then
you *really* need it 🙂

    Daniel> That said, does the sudo feature (which is great and sorely needed)
    Daniel> need such a prominent keybinding? Might M-x sudo be sufficient? People
    Daniel> type s u d o in the terminal all the time.

How about "C-u C-u M-x revert-buffer", and then people can choose
their own key binding? Sticking it on "C-x @" or "C-x |" seems like
overkill.

Robert
-- 

Message #32 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: Daniel Colascione <dancol <at> dancol.org>, 76974 <at> debbugs.gnu.org,
 stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 11:46:26 +0100

Robert Pluim <rpluim <at> gmail.com> writes:

Hi Robert,

> How about "C-u C-u M-x revert-buffer", and then people can choose
> their own key binding? Sticking it on "C-x @" or "C-x |" seems like
> overkill.

'C-u C-u M-x revert-buffer' doesn't sound like a benefit, compared with
'M-x tramp-rev TAB'.

But revert-buffer is a good hint. We have already the 'C-x x g'
binding. How about to bind 'C-x x @' to tramp-revert-buffer-with-sudo?
The ctl-x-x-map collects already some less frequently used buffer
commands.

> Robert

Best regards, Michael.

Message #35 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Daniel Colascione <dancol <at> dancol.org>, 76974 <at> debbugs.gnu.org,
 stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 11:58:49 +0100

>>>>> On Wed, 12 Mar 2025 11:46:26 +0100, Michael Albinus <michael.albinus <at> gmx.de> said:

    Michael> Robert Pluim <rpluim <at> gmail.com> writes:
    Michael> Hi Robert,

    >> How about "C-u C-u M-x revert-buffer", and then people can choose
    >> their own key binding? Sticking it on "C-x @" or "C-x |" seems like
    >> overkill.

    Michael> 'C-u C-u M-x revert-buffer' doesn't sound like a benefit, compared with
    Michael> 'M-x tramp-rev TAB'.

In my setup is would be "C-u C-u s-u", since I bind "s-u" to `revert-buffer'.

    Michael> But revert-buffer is a good hint. We have already the 'C-x x g'
    Michael> binding. How about to bind 'C-x x @' to tramp-revert-buffer-with-sudo?
    Michael> The ctl-x-x-map collects already some less frequently used buffer
    Michael> commands.

I like this suggestion. Although for non-US keyboards maybe "C-x x s"
would be easier to type?

Robert
-- 

Message #38 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: Daniel Colascione <dancol <at> dancol.org>, 76974 <at> debbugs.gnu.org,
 stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 12:05:56 +0100

Robert Pluim <rpluim <at> gmail.com> writes:

Hi Robert,

>     Michael> But revert-buffer is a good hint. We have already the 'C-x x g'
>     Michael> binding. How about to bind 'C-x x @' to tramp-revert-buffer-with-sudo?
>     Michael> The ctl-x-x-map collects already some less frequently used buffer
>     Michael> commands.
>
> I like this suggestion. Although for non-US keyboards maybe "C-x x s"
> would be easier to type?

Well, I use a German keyboard as well. Typing '@' isn't a pain, because it
happens so often; my finger muscles are trained. But I don't insist on
my preference. Majority of users will decide.

And there is still my proposal to bind '@' in dired. Similar key
bindings are a benefit.

> Robert

Best regards, Michael.

Message #41 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Sean Whitton <spwhitton <at> spwhitton.name>
To: Robert Pluim <rpluim <at> gmail.com>, Michael Albinus
 <michael.albinus <at> gmx.de>,  Daniel Colascione <dancol <at> dancol.org>,
 76974 <at> debbugs.gnu.org,  stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 19:49:45 +0800

Hello,

Yes, when I saw this my first thought was the C-x x keymap.  I think
using one of TRAMP's commonly-used characters would be good, so:

    C-x x @
or  C-x x :
or  C-x x |
or  C-x x /

I would suggest avoiding '|' because we might want to use it later for
something pipe-related.

We would want it to be easy to customise this for specific systems so
that the new binding always gets you root access, on systems that use
doas or su instead of sudo.
I see that there is already tramp-file-name-with-method for configuring
this.

Have you considered renaming the command to something like
tramp-revert-buffer-obtain-root ?  Adding a global binding seems like a
nice opportunity for a rename.

-- 
Sean Whitton

Message #44 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Sean Whitton <spwhitton <at> spwhitton.name>
To: Robert Pluim <rpluim <at> gmail.com>, Michael Albinus
 <michael.albinus <at> gmx.de>,  Daniel Colascione <dancol <at> dancol.org>,
 76974 <at> debbugs.gnu.org,  stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 19:51:25 +0800

Hello,

On Wed 12 Mar 2025 at 07:49pm +08, Sean Whitton wrote:

> Have you considered renaming the command to something like
> tramp-revert-buffer-obtain-root ?  Adding a global binding seems like a
> nice opportunity for a rename.

... which suggests C-x x # as root's shell prompt character on many systems.

-- 
Sean Whitton

Message #47 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Sean Whitton <spwhitton <at> spwhitton.name>
Cc: Robert Pluim <rpluim <at> gmail.com>, Daniel Colascione <dancol <at> dancol.org>,
 76974 <at> debbugs.gnu.org, stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 13:16:50 +0100

Sean Whitton <spwhitton <at> spwhitton.name> writes:

> Hello,

Hi Sean,

> Yes, when I saw this my first thought was the C-x x keymap.  I think
> using one of TRAMP's commonly-used characters would be good, so:
>
>     C-x x @
> or  C-x x :
> or  C-x x |
> or  C-x x /
>
> I would suggest avoiding '|' because we might want to use it later for
> something pipe-related.

Welcome to our funny bikeshedding :-)

'@' is already used for indication of remoteness, see mode-line-remote.
And again, I prefer to use the same key in ctl-x-x-map and dired-mode-map.

> We would want it to be easy to customise this for specific systems so
> that the new binding always gets you root access, on systems that use
> doas or su instead of sudo.
> I see that there is already tramp-file-name-with-method for configuring
> this.

Yes. This must be improved, I guess.

> Have you considered renaming the command to something like
> tramp-revert-buffer-obtain-root ?  Adding a global binding seems like a
> nice opportunity for a rename.

Yes, I did. Neither tramp-revert-buffer-with-sudo nor
tramp-revert-buffer-obtain-root are a perfect name. We don't know for
sure, that the method will be "sudo", nor that the user will be
"root". On my QNAP NAS, the root user is called "admin".

And using a Tramp specific name for a global bound command doesn't seem
to be proper as well.

I was thinking to introduce a new command
'revert-buffer-<something-better-than-sudo-or-root>', which will be an
alias of tramp-revert-buffer-with-sudo. But I'm bad with proper names.

This is a minor issue; we can find the best command name as long as
Emacs 31 is under development.

Best regards, Michael.

Message #50 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Sean Whitton <spwhitton <at> spwhitton.name>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Robert Pluim <rpluim <at> gmail.com>, Daniel Colascione <dancol <at> dancol.org>,
 76974 <at> debbugs.gnu.org, stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 21:13:28 +0800

Hello,

On Wed 12 Mar 2025 at 01:16pm +01, Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of text editors" wrote:

> Welcome to our funny bikeshedding :-)
>
> '@' is already used for indication of remoteness, see mode-line-remote.
> And again, I prefer to use the same key in ctl-x-x-map and dired-mode-map.

Yeah, "@" seems most natural.

> Yes, I did. Neither tramp-revert-buffer-with-sudo nor
> tramp-revert-buffer-obtain-root are a perfect name. We don't know for
> sure, that the method will be "sudo", nor that the user will be
> "root". On my QNAP NAS, the root user is called "admin".

But "gain root" as a verb has the same meaning, even if the root user is
not named "root".

> And using a Tramp specific name for a global bound command doesn't
> seem to be proper as well.

I don't think that's a problem, myself.
Keeping "tramp-" might be helpful documentation.

-- 
Sean Whitton

Message #53 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Visuwesh <visuweshm <at> gmail.com>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: Michael Albinus <michael.albinus <at> gmx.de>, 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 19:12:13 +0530

[புதன் மார்ச் 12, 2025] Stephen Berman via "Bug reports for GNU Emacs, the Swiss army knife of text editors" wrote:

> [...]
> Another available key combination is `C-c @', unless '@' counts as a
> letter (info "(elisp) Key Binding Conventions").  (On e.g. German
> keyboards '|' and '@' are not the easiest keys to type, but that's
> probably not a decisive criterion.)

C-c @ is used as a prefix by outline-minor-mode (and hs-minor-mode
IIRC).

Message #56 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Filipp Gunbin <fgunbin <at> fastmail.fm>
To: Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of
 text editors" <bug-gnu-emacs <at> gnu.org>
Cc: Daniel Colascione <dancol <at> dancol.org>, Robert Pluim <rpluim <at> gmail.com>,
 Michael Albinus <michael.albinus <at> gmx.de>, stephen.berman <at> gmx.net,
 76974 <at> debbugs.gnu.org, Sean Whitton <spwhitton <at> spwhitton.name>
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 17:21:39 +0300

On 12/03/2025 13:16 +0100, Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of text editors" wrote:

> Yes, I did. Neither tramp-revert-buffer-with-sudo nor
> tramp-revert-buffer-obtain-root are a perfect name. We don't know for
> sure, that the method will be "sudo", nor that the user will be
> "root". On my QNAP NAS, the root user is called "admin".
>
> And using a Tramp specific name for a global bound command doesn't seem
> to be proper as well.
>
> I was thinking to introduce a new command
> 'revert-buffer-<something-better-than-sudo-or-root>', which will be an
> alias of tramp-revert-buffer-with-sudo. But I'm bad with proper names.

Maybe revert-buffer-as-superuser?

Message #62 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Daniel Colascion <dancol <at> dancol.org>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: stephen.berman <at> gmx.net, michael.albinus <at> gmx.de, 76974 <at> debbugs.gnu.org
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Wed, 12 Mar 2025 12:27:20 -0400

On 2025-03-12 05:58, Robert Pluim wrote:
>>>>>> On Wed, 12 Mar 2025 02:43:18 -0700, Daniel Colascione 
>>>>>> <dancol <at> dancol.org> said:
> 
>     Daniel> On March 12, 2025 1:50:43 AM PDT, "Stephen Berman via Bug 
> reports for
>     Daniel> GNU Emacs, the Swiss army knife of text editors"
>     Daniel> <bug-gnu-emacs <at> gnu.org> wrote:
>     >> On Wed, 12 Mar 2025 09:27:50 +0100 Michael Albinus via "Bug 
> reports
>     >> for GNU Emacs, the Swiss army knife of text editors"
>     >> <bug-gnu-emacs <at> gnu.org> wrote:
>     >>
>     >>> tramp-revert-buffer-with-sudo has been added to Emacs 30.1. I 
> propose to
>     >>> give it a global key binding 'C-x @'. With this binding, it is 
> more
>     >>> simple to revert the current buffer to visit with "sudo"
>     >>> permissions. This is useful for buffers visiting a file, or for 
> dired
>     >>> buffers.
>     >>
>     >> `C-x @' is the prefix for the `event-apply-*-modifier' functions 
> in the
>     >> globally accessible function-key-map.
> 
> 
>     Daniel> This prefix binding is sitting on some pretty valuable real 
> estate ---
>     Daniel> not as valuable as C-o, granted, but still. Is the modifier 
> prefix
>     Daniel> feature justifying its squatting on this binding? I don't 
> think I've
>     Daniel> ever used it on purpose, and keyboards with missing 
> essential
>     Daniel> modifiers are a rarity. Seems like a niche feature to 
> enable with a
>     Daniel> mode or something.
> 
> Itʼs one of those things that are useless until you need it, and then
> you *really* need it 🙂
> 
>     Daniel> That said, does the sudo feature (which is great and sorely 
> needed)
>     Daniel> need such a prominent keybinding? Might M-x sudo be 
> sufficient? People
>     Daniel> type s u d o in the terminal all the time.
> 
> How about "C-u C-u M-x revert-buffer", and then people can choose
> their own key binding? Sticking it on "C-x @" or "C-x |" seems like
> overkill.

FWIW, I'm not a fan of this "tap C-u seventeen times while hopping on 
one leg
under the full moon" UI paradigm that parts of the system have. C-u 
C-SPC isn't
great either. I'd hope we could move more towards named commands and 
less universal
prefix as a generic identifier that means different things in different 
contexts.

I'd also find M-x s u d o a lot more convenient than C-u C-u M-x [...]. 
Not every
possible command needs a keybinding.

Message #65 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of
 text editors" <bug-gnu-emacs <at> gnu.org>
Cc: Robert Pluim <rpluim <at> gmail.com>, Daniel Colascione <dancol <at> dancol.org>,
 stephen.berman <at> gmx.net, 76974-done <at> debbugs.gnu.org,
 Sean Whitton <spwhitton <at> spwhitton.name>
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Fri, 14 Mar 2025 16:40:47 +0100

Version: 31.1

Filipp Gunbin <fgunbin <at> fastmail.fm> writes:

Hi everybody,

>> Yes, I did. Neither tramp-revert-buffer-with-sudo nor
>> tramp-revert-buffer-obtain-root are a perfect name. We don't know for
>> sure, that the method will be "sudo", nor that the user will be
>> "root". On my QNAP NAS, the root user is called "admin".
>>
>> And using a Tramp specific name for a global bound command doesn't seem
>> to be proper as well.
>>
>> I was thinking to introduce a new command
>> 'revert-buffer-<something-better-than-sudo-or-root>', which will be an
>> alias of tramp-revert-buffer-with-sudo. But I'm bad with proper names.
>
> Maybe revert-buffer-as-superuser?

There is general agreement on this feature. So I've pushed a patch to the
master branch:

- Add key binding 'C-x x @' to tramp-revert-buffer-with-sudo.
- New command tramp-dired-find-file-with-sudo, bound to '@' in Dired.
- Add handling of prefix argument 'C-u' for both commands, asking
  interactively for another Tramp method but "sudo".

I haven't changed the command names; it doesn't seem to be urgent now we
have the bindings.

Closing the bug.

Best regards, Michael.

Message #73 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Robert Pluim <rpluim <at> gmail.com>, Daniel Colascione <dancol <at> dancol.org>,
 Sean Whitton <spwhitton <at> spwhitton.name>, 76974 <at> debbugs.gnu.org,
 stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50;
 [wishlist] Add global key binding for tramp-revert-buffer-with-sudo
Date: Fri, 14 Mar 2025 11:55:14 -0700

Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs <at> gnu.org> writes:

> There is general agreement on this feature. So I've pushed a patch to the
> master branch:

There is now this warning:

bindings.el:1610:9: Warning: the function
‘tramp-revert-buffer-with-sudo’ is not known to be defined.

Message #76 received at 76974 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: Robert Pluim <rpluim <at> gmail.com>, Daniel Colascione <dancol <at> dancol.org>,
 Sean Whitton <spwhitton <at> spwhitton.name>, 76974 <at> debbugs.gnu.org,
 stephen.berman <at> gmx.net
Subject: Re: bug#76974: 31.0.50; [wishlist] Add global key binding for
 tramp-revert-buffer-with-sudo
Date: Sat, 15 Mar 2025 10:01:09 +0100

Stefan Kangas <stefankangas <at> gmail.com> writes:

Hi Stefan,

>> There is general agreement on this feature. So I've pushed a patch to the
>> master branch:
>
> There is now this warning:
>
> bindings.el:1610:9: Warning: the function
> ‘tramp-revert-buffer-with-sudo’ is not known to be defined.

Indeed, when calling 'make bootstrap' (which I didn't). Fixed in master.

Best regards, Michael.

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