* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
@ 2019-07-19 21:21 Jean Louis
2019-07-20 7:16 ` Eli Zaretskii
` (2 more replies)
0 siblings, 3 replies; 20+ messages in thread
From: Jean Louis @ 2019-07-19 21:21 UTC (permalink / raw)
To: 36733
I have observed that if I write in Eshell:
$ cd Documents
That it enters the directory quickly.
But if I write:
$ cd Docum TAB
it expands into
$ cd Documents/
then when I press ENTER it is taking sometimes 1 second or few seconds
just to enter the directory.
This also happens if inside of directory there is just one file.
In GNU Emacs 27.0.50 (build 11, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
of 2019-07-18 built on protected.rcdrun.com
Repository revision: a4e57274cc3ad920d6113700ce6496e85eb66ebb
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Hyperbola GNU/Linux-libre
Recent messages:
Contacting host: github.com:443
Mark set
Making completion list...
Stopping animation; animation possibly too big [6 times]
(There was no command output)
When done with a buffer, type C-x #
Saving file /home/data1/protected/tmp/mutt-protected-1001-4117-7445622631218989887...
Wrote /home/data1/protected/tmp/mutt-protected-1001-4117-7445622631218989887
Configured using:
'configure --prefix=/package/text/emacs-2019-07-18 --with-modules
--without-pop --with-mailutils --with-x-toolkit=lucid --without-gpm'
Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG SOUND DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS LUCID X11 XDBE XIM MODULES THREADS JSON PDUMPER
LCMS2 GMP
Important settings:
value of $LC_ALL: de_DE.UTF-8
value of $LANG: de_DE.UTF-8
locale-coding-system: utf-8-unix
Major mode: Eshell
Minor modes in effect:
TeX-PDF-mode: t
highlight-changes-visible-mode: t
say-minor-mode: t
strokes-mode: t
dynamic-completion-mode: t
jabber-activity-mode: t
show-paren-mode: t
guide-key-mode: t
persistent-scratch-autosave-mode: t
shell-dirtrack-mode: t
auto-compile-on-load-mode: t
auto-compile-on-save-mode: t
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
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debug backtrace tutorial let-alist md4rd tree-mode tree-widget request
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byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib tooltip eldoc
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win
x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow isearch timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame cl-generic cham georgian utf-8-lang misc-lang
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hebrew greek romanian slovak czech european ethiopic indian cyrillic
chinese composite charscript charprop case-table epa-hook jka-cmpr-hook
help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote threads dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting x-toolkit x multi-tty
make-network-process emacs)
Memory information:
((conses 16 3380406 325872)
(symbols 48 77875 111)
(strings 32 554923 43811)
(string-bytes 1 30068221)
(vectors 16 142501)
(vector-slots 8 2626886 144700)
(floats 8 1759 2480)
(intervals 56 341997 666)
(buffers 992 799))
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-19 21:21 bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Jean Louis
@ 2019-07-20 7:16 ` Eli Zaretskii
2019-07-20 7:50 ` Jean Louis
2020-02-29 1:30 ` bug#36733: (no subject) Ivan Kozlov
2020-02-29 3:51 ` bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Ivan Kozlov
2 siblings, 1 reply; 20+ messages in thread
From: Eli Zaretskii @ 2019-07-20 7:16 UTC (permalink / raw)
To: Jean Louis; +Cc: 36733
> From: Jean Louis <bugs@gnu.support>
> Date: Fri, 19 Jul 2019 23:21:28 +0200
>
>
> I have observed that if I write in Eshell:
>
> $ cd Documents
>
> That it enters the directory quickly.
>
> But if I write:
>
> $ cd Docum TAB
>
> it expands into
>
> $ cd Documents/
>
> then when I press ENTER it is taking sometimes 1 second or few seconds
> just to enter the directory.
>
> This also happens if inside of directory there is just one file.
Doesn't happen here. I suggest to start a CPU profiler, perform this
many times, then show the profile, completely expanded. For best
results, load em-dirs.el as an uncompiled file, before doing this
experiment.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 7:16 ` Eli Zaretskii
@ 2019-07-20 7:50 ` Jean Louis
2019-07-20 8:31 ` Eli Zaretskii
0 siblings, 1 reply; 20+ messages in thread
From: Jean Louis @ 2019-07-20 7:50 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 36733
* Eli Zaretskii <eliz@gnu.org> [2019-07-20 09:16]:
> Doesn't happen here. I suggest to start a CPU profiler, perform this
> many times, then show the profile, completely expanded. For best
> results, load em-dirs.el as an uncompiled file, before doing this
> experiment.
Help me how to start CPU profiler? Is it gprof?
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 7:50 ` Jean Louis
@ 2019-07-20 8:31 ` Eli Zaretskii
2019-07-20 9:07 ` Jean Louis
0 siblings, 1 reply; 20+ messages in thread
From: Eli Zaretskii @ 2019-07-20 8:31 UTC (permalink / raw)
To: Jean Louis; +Cc: 36733
> Date: Sat, 20 Jul 2019 09:50:07 +0200
> From: Jean Louis <bugs@gnu.support>
> Cc: 36733@debbugs.gnu.org
>
> * Eli Zaretskii <eliz@gnu.org> [2019-07-20 09:16]:
> > Doesn't happen here. I suggest to start a CPU profiler, perform this
> > many times, then show the profile, completely expanded. For best
> > results, load em-dirs.el as an uncompiled file, before doing this
> > experiment.
>
> Help me how to start CPU profiler? Is it gprof?
"M-x profiler-start RET RET", then do the command, perhaps several
times, then "M-x profiler-report RET". To expand the profile, go to
the top-level line with "+" at its left, and type "C-u RET".
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 8:31 ` Eli Zaretskii
@ 2019-07-20 9:07 ` Jean Louis
2019-07-20 10:08 ` Eli Zaretskii
0 siblings, 1 reply; 20+ messages in thread
From: Jean Louis @ 2019-07-20 9:07 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 36733
This is what I have done:
$ emacs -Q
Then I started profiler, and within Emacs I went
to em-dirs.el.gz and clicked L to load the file
Then I started eshell and did following:
Welcome to the Emacs shell
~ $ cd Programming/
~/Programming $ cd ..
~ $ cd Documents/
~/Documents $ cd ..
~ $ cd tmp
~/tmp $ cd ..
~ $ cd tmp/
~/tmp $ cd ..
~ $ cd Media/
~/Media $
Here is the report:
- completion-in-region--postch 348 85%
- #<compiled 0xd05b1d> 348 85%
- pcomplete-completions-at-point 348 85%
- pcomplete-completions 348 85%
- #<compiled 0xd04211> 348 85%
- pcomplete--here 348 85%
- #<compiled 0xd041fd> 348 85%
- eshell-complete-commands-list 151 37%
- pcomplete-uniquify-list 4 0%
sort 1 0%
- eshell-winnow-list 2 0%
eshell-find-alias-function 1 0%
- ... 49 12%
Automatic GC 47 11%
- minibuffer-complete 2 0%
- completion-in-region 2 0%
- completion--in-region 2 0%
- #<compiled 0xcfe355> 2 0%
- apply 2 0%
- #<compiled 0x1ffde1d7d889> 2 0%
- completion--in-region-1 2 0%
- completion--do-completion 2 0%
- completion-try-completion 2 0%
- completion--nth-completion 2 0%
- completion--some 2 0%
- #<compiled 0xcfe37d> 2 0%
- completion-basic-try-completion 2 0%
- try-completion 2 0%
- #<compiled 0x1ffde1da8f4b> 2 0%
complete-with-action 2 0%
- command-execute 11 2%
- call-interactively 10 2%
- funcall-interactively 8 1%
- execute-extended-command 7 1%
- command-execute 6 1%
- call-interactively 6 1%
- funcall-interactively 6 1%
- eshell 5 1%
- eshell-mode 5 1%
- load 2 0%
- file-truename 1 0%
- file-truename 1 0%
file-truename 1 0%
- byte-code 1 0%
- require 1 0%
- byte-code 1 0%
- require 1 0%
- defvar 1 0%
- byte-code 1 0%
- substitute-key-definition 1 0%
- map-keymap 1 0%
- #<compiled 0xd11045> 1 0%
- substitute-key-definition-key 1 0%
- substitute-key-definition 1 0%
- map-keymap 1 0%
#<compiled 0xd11075> 1 0%
- run-hooks 1 0%
- eshell-emit-prompt 1 0%
- eshell-output-filter 1 0%
- eshell-run-output-filters 1 0%
- run-hooks 1 0%
- eshell-postoutput-scroll-to-bottom 1 0%
walk-windows 1 0%
profiler-report 1 0%
- sit-for 1 0%
read-event 1 0%
- eshell-send-input 1 0%
- eval 1 0%
- eshell-commands 1 0%
- let 1 0%
- progn 1 0%
- run-hooks 1 0%
- eshell-emit-prompt 1 0%
- eshell-output-filter 1 0%
- eshell-run-output-filters 1 0%
- run-hooks 1 0%
- eshell-postoutput-scroll-to-bottom 1 0%
walk-windows 1 0%
- byte-code 2 0%
- read-extended-command 2 0%
- completing-read 2 0%
- completing-read-default 2 0%
read-from-minibuffer 2 0%
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 9:07 ` Jean Louis
@ 2019-07-20 10:08 ` Eli Zaretskii
2019-07-20 10:31 ` Jean Louis
0 siblings, 1 reply; 20+ messages in thread
From: Eli Zaretskii @ 2019-07-20 10:08 UTC (permalink / raw)
To: Jean Louis; +Cc: 36733
> Date: Sat, 20 Jul 2019 11:07:20 +0200
> From: Jean Louis <bugs@gnu.support>
> Cc: 36733@debbugs.gnu.org
>
> This is what I have done:
>
> $ emacs -Q
>
> Then I started profiler, and within Emacs I went
> to em-dirs.el.gz and clicked L to load the file
>
> Then I started eshell and did following:
>
> Welcome to the Emacs shell
>
> ~ $ cd Programming/
> ~/Programming $ cd ..
> ~ $ cd Documents/
> ~/Documents $ cd ..
> ~ $ cd tmp
> ~/tmp $ cd ..
> ~ $ cd tmp/
> ~/tmp $ cd ..
> ~ $ cd Media/
> ~/Media $
>
> Here is the report:
Thanks. I don't see eshell/cd anywhere in this report, so it's hard
to glean anything useful from the profile.
Please modify your procedure as follows:
emacs -Q
M-x load-library RET em-dirs.el RET
M-x eshell RET
M-x profiler-start RET RET
~ $ cd Programming/
~/Programming $ cd ..
~ $ cd Documents/
~/Documents $ cd ..
~ $ cd tmp
~/tmp $ cd ..
~ $ cd tmp/
~/tmp $ cd ..
~ $ cd Media/
~/Media $
M-x profiler-report RET
IOW, start the profiler just before you start the Eshell commands.
If the results don't show eshell/cd in the profile, or if the
percentage for that is too low, perhaps repeat the recipe with more
"cd" commands.
Thanks.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 10:08 ` Eli Zaretskii
@ 2019-07-20 10:31 ` Jean Louis
2019-07-20 10:55 ` Eli Zaretskii
0 siblings, 1 reply; 20+ messages in thread
From: Jean Louis @ 2019-07-20 10:31 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 36733
Here it is:
- completion-in-region--postch 357 86%
- #<compiled 0xb94c41> 357 86%
- pcomplete-completions-at-point 357 86%
- pcomplete-completions 357 86%
- #<compiled 0xade071> 357 86%
- pcomplete--here 357 86%
- #<compiled 0xade05d> 357 86%
- eshell-complete-commands-list 156 37%
- pcomplete-uniquify-list 4 0%
sort 1 0%
- eshell-winnow-list 1 0%
eshell-find-alias-function 1 0%
- ... 41 9%
Automatic GC 40 9%
- #<compiled 0x1fc9a5d12089> 1 0%
- completion--in-region-1 1 0%
- completion--do-completion 1 0%
- completion-try-completion 1 0%
- completion--nth-completion 1 0%
- completion--some 1 0%
- #<compiled 0xb98625> 1 0%
- completion-basic-try-completion 1 0%
- try-completion 1 0%
- #<compiled 0xb2454d> 1 0%
- complete-with-action 1 0%
- #<compiled 0xb24541> 1 0%
- completion-table-with-predicate 1 0%
- complete-with-action 1 0%
- comint-completion-file-name-table 1 0%
completion-file-name-table 1 0%
- command-execute 17 4%
- call-interactively 17 4%
- funcall-interactively 17 4%
- execute-extended-command 17 4%
- execute-extended-command--shorter 17 4%
- completion-try-completion 17 4%
- completion--nth-completion 17 4%
- completion--some 17 4%
- #<compiled 0xb88ee1> 17 4%
- completion-pcm-try-completion 9 2%
- completion-pcm--find-all-completions 9 2%
completion-pcm--all-completions 9 2%
completion-basic-try-completion 8 1%
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 10:31 ` Jean Louis
@ 2019-07-20 10:55 ` Eli Zaretskii
2019-07-20 15:28 ` Jean Louis
0 siblings, 1 reply; 20+ messages in thread
From: Eli Zaretskii @ 2019-07-20 10:55 UTC (permalink / raw)
To: Jean Louis; +Cc: 36733
> Date: Sat, 20 Jul 2019 12:31:02 +0200
> From: Jean Louis <bugs@gnu.support>
> Cc: 36733@debbugs.gnu.org
>
> Here it is:
>
> - completion-in-region--postch 357 86%
> - #<compiled 0xb94c41> 357 86%
> - pcomplete-completions-at-point 357 86%
> - pcomplete-completions 357 86%
> - #<compiled 0xade071> 357 86%
> - pcomplete--here 357 86%
> - #<compiled 0xade05d> 357 86%
> - eshell-complete-commands-list 156 37%
Hmm... something related to completion, it seems.
Do you see the problem when the directory into which you cd is
completely empty?
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 10:55 ` Eli Zaretskii
@ 2019-07-20 15:28 ` Jean Louis
2019-07-20 15:56 ` Eli Zaretskii
0 siblings, 1 reply; 20+ messages in thread
From: Jean Louis @ 2019-07-20 15:28 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 36733
* Eli Zaretskii <eliz@gnu.org> [2019-07-20 12:55]:
> > Date: Sat, 20 Jul 2019 12:31:02 +0200
> > From: Jean Louis <bugs@gnu.support>
> > Cc: 36733@debbugs.gnu.org
> >
> > Here it is:
> >
> > - completion-in-region--postch 357 86%
> > - #<compiled 0xb94c41> 357 86%
> > - pcomplete-completions-at-point 357 86%
> > - pcomplete-completions 357 86%
> > - #<compiled 0xade071> 357 86%
> > - pcomplete--here 357 86%
> > - #<compiled 0xade05d> 357 86%
> > - eshell-complete-commands-list 156 37%
>
> Hmm... something related to completion, it seems.
>
> Do you see the problem when the directory into which you cd is
> completely empty?
Yes, my directory ~/Desktop is completely
empty. It happens only when I do:
$ cd Desk TAB
then comes expansion and I see:
$ cd Desktop/X
whereby the cursor is still at X position and
waiting first time like 3-6 seconds.
Second time there is also lag, but shorter, like 1
second or 0.4 seconds something. Then if repeated
again little later, it can again be with longer
lag.
I wonder how you do not have see it, as I am starting
it with emacs -Q
Jean
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 15:28 ` Jean Louis
@ 2019-07-20 15:56 ` Eli Zaretskii
2019-07-20 16:22 ` Jean Louis
0 siblings, 1 reply; 20+ messages in thread
From: Eli Zaretskii @ 2019-07-20 15:56 UTC (permalink / raw)
To: Jean Louis; +Cc: 36733
> Date: Sat, 20 Jul 2019 17:28:55 +0200
> From: Jean Louis <bugs@gnu.support>
> Cc: 36733@debbugs.gnu.org
>
> I wonder how you do not have see it, as I am starting
> it with emacs -Q
What if you empty your ~/.eshell directory, and then restart Emacs --
does that make any change?
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 15:56 ` Eli Zaretskii
@ 2019-07-20 16:22 ` Jean Louis
2019-07-20 16:40 ` Eli Zaretskii
0 siblings, 1 reply; 20+ messages in thread
From: Jean Louis @ 2019-07-20 16:22 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 36733
* Eli Zaretskii <eliz@gnu.org> [2019-07-20 17:57]:
> > I wonder how you do not have see it, as I am starting
> > it with emacs -Q
>
> What if you empty your ~/.eshell directory, and then restart Emacs --
> does that make any change?
That one I did not have. I had directory in
~/.emacs.d/eshell and I emptied it, and I have the
same phenomena again.
Jean
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-20 16:22 ` Jean Louis
@ 2019-07-20 16:40 ` Eli Zaretskii
0 siblings, 0 replies; 20+ messages in thread
From: Eli Zaretskii @ 2019-07-20 16:40 UTC (permalink / raw)
To: Jean Louis; +Cc: 36733
> Date: Sat, 20 Jul 2019 18:22:14 +0200
> From: Jean Louis <bugs@gnu.support>
> Cc: 36733@debbugs.gnu.org
>
> > What if you empty your ~/.eshell directory, and then restart Emacs --
> > does that make any change?
>
> That one I did not have. I had directory in
> ~/.emacs.d/eshell and I emptied it, and I have the
> same phenomena again.
Then I'm stumped. Maybe someone who knows Eshell better could chime
in.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: (no subject)
2019-07-19 21:21 bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Jean Louis
2019-07-20 7:16 ` Eli Zaretskii
@ 2020-02-29 1:30 ` Ivan Kozlov
2020-02-29 9:40 ` Ivan Kozlov
2020-02-29 3:51 ` bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Ivan Kozlov
2 siblings, 1 reply; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 1:30 UTC (permalink / raw)
To: 36733
This indeed has nothing to do with cd.
Any time complete-in-region-mode (apparently, I don’t actually know what does that) is active in eshell, typing RET, or C-j, or C-c C-u and probably many similar commands which should probably conceptually exit the mode, it lags forever. It takes many seconds on my old netbook.
Not only that, it doesn’t even exit the mode! So if you enter ls a<TAB>, then C-c C-u, then type something again and do RET/C-c C-u/etc., it will lag. Even if you type RET and get a new prompt, it will continue to lag. But then if you type something in the new prompt, apparently it won’t. It’s crazy.
Needless to say, erasing only the argument in question also doesn’t quit it. If you enter ls a<TAB> and erase the ‘a’ with DEL/M-DEL/C-c C-w/etc., then press RET/C-c C-u/etc., it will lag.
But here are some things that do quit it:
— typing SPC;
— pressing C-g;
— moving the point to outside the argument;
— switching to a different buffer and back.
All this equally applies to command completion etc.
In general, completion in eshell is *completely* broken.
One further example: when complete-in-region-mode is active (again, _apparently_) and there is some text before the point, typing * (the asterisk character) runs some undocumented command which completes the argument if there is exactly one possible completion and doesn’t do anything otherwise, so it’s like TAB without the *Completions* buffer.
So typing ls a<TAB>/* will produce ls a/b if b is the only file in a/, and ls a/ otherwise.
This makes entering glob patterns (one of the most common tasks in shell) a *giant pain* with constantly hitting C-g and what not to make the completion stuff go away. I have no idea whether using * for the command was a deliberate decision, but it is really bad.
Moreover, typing \ inserts \<TAB>! This one is inexplicable. It makes quoting characters a giant pain with constantly erasing the tab or cancelling the completion garbage as above.
The third atrocity is bug #15386.
Together they render eshell clearly unusable.
I wish I could remotely understand what’s going on between completion-in-region/pcomplete/eshell, but the code appears complicated and is completely undocumented. I can’t even find where the * and \ bindings are set up. It is certainly the most horribly broken thing I have encountered in Emacs.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2019-07-19 21:21 bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Jean Louis
2019-07-20 7:16 ` Eli Zaretskii
2020-02-29 1:30 ` bug#36733: (no subject) Ivan Kozlov
@ 2020-02-29 3:51 ` Ivan Kozlov
2020-02-29 6:40 ` Ivan Kozlov
2 siblings, 1 reply; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 3:51 UTC (permalink / raw)
To: 36733
I think I am starting to understand what’s going on.
The profiler shows that eshell-complete-commands-list is being called. This function completes a command name.
But weren’t we completing a file name? What does this function have to do with it?
completion-in-region-mode installs a hook function completion-in-region--postch to post-command-hook, which is supposed to exit the mode when necessary. I don’t quite understand its logic. It tests for a bunch of conditions; here is the crucial block:
(and completion-in-region--data
(and (eq (marker-buffer (nth 0 completion-in-region--data))
(current-buffer))
(>= (point) (nth 0 completion-in-region--data))
(<= (point)
(save-excursion
(goto-char (nth 1 completion-in-region--data))
(line-end-position)))
(funcall completion-in-region-mode--predicate)))
The initial conditions somehow turn out to be true when the argument, or the whole line, is deleted, or a new line is entered. Then it calls completion-in-region-mode--predicate, which is in this case apparently provided by completion-at-point, which is what TAB is bound to in eshell. I don’t quite understand the logic. It calls a function which ultimately comes from the completion-at-point-functions list. In eshell it is pcomplete-completions-at-point.
Because C-c C-u has erased the line (apparently post-command-hook is run before redisplay?), or, in the original bug, a line feed has been entered, pcomplete-completions-at-point operates from an empty line.
The result is exactly the same as hitting TAB at an empty prompt. It creates a list of all possible commands including *all executables from $PATH*.
Hence the bug.
I believe fixing it properly requires altering completion-in-region--postch. Altering it requires understanding why it is the way it is (like why doesn’t it already exit the mode when the region is gone), which I don’t have.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2020-02-29 3:51 ` bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Ivan Kozlov
@ 2020-02-29 6:40 ` Ivan Kozlov
2020-02-29 7:24 ` Ivan Kozlov
0 siblings, 1 reply; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 6:40 UTC (permalink / raw)
To: 36733
I have identified the problem. completion-in-region uses markers to identify the beginning and the end of the region where the completion is active. The markers are saved into the list completion-in-region--data.
completion-in-region--post checks if the point has left the buffer, in which case it quits the completion mode (as I have already noted):
(>= (point) (nth 0 completion-in-region--data))
(<= (point)
(save-excursion
(goto-char (nth 1 completion-in-region--data))
(line-end-position)))
Erasing text or entering line feed moves markers, it appears to be their whole purpose. Here is the problem. The markers move and the conditions above give true, so 1) completion-in-mode--predicate is called 2) completion-in-region mode remains active, both of which are wrong.
My investigation must end here. I don’t know why completion-in-region-mode is using markers (to enter text outside the region you probably need to move the point out of it, which exits the mode), and I don’t know if it is possible to avoid this situation when using them. All I know is that the current behavior is wrong and doesn’t make any sense. I do hope somebody chimes in who has any ideas.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2020-02-29 6:40 ` Ivan Kozlov
@ 2020-02-29 7:24 ` Ivan Kozlov
2020-02-29 7:56 ` Ivan Kozlov
0 siblings, 1 reply; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 7:24 UTC (permalink / raw)
To: 36733
>completion-in-region--post checks if the point has left the buffer
Correction: the region (where the completion is active).
To reiterate the point: completion-in-region-mode must stop using persistent markers. It’s literally a bug. I don’t see why it can’t use numerical positions. If there is a legitimate reason, may be it is possible to make markers work differently.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2020-02-29 7:24 ` Ivan Kozlov
@ 2020-02-29 7:56 ` Ivan Kozlov
2020-02-29 9:02 ` Ivan Kozlov
2020-02-29 9:33 ` Ivan Kozlov
0 siblings, 2 replies; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 7:56 UTC (permalink / raw)
To: 36733
I was probably wrong about the apparent total unsuitability of the markers.
I just realised the issue with argument deletion can be fixed trivially:
--- /gnu/store/1ffhlsa973ym7j2zsyrbm892jxcpzmqq-emacs-next-27.0.50-0.36abf68/share/emacs/27.0.50/lisp/minibuffer.el.gz
+++ #<buffer minibuffer.el.gz>
@@ -2132,6 +2132,7 @@
(and completion-in-region--data
(and (eq (marker-buffer (nth 0 completion-in-region--data))
(current-buffer))
+ (< (nth 0 completion-in-region--data) (nth 1 completion-in-region--data))
(>= (point) (nth 0 completion-in-region--data))
(<= (point)
(save-excursion
It works. I don’t know if it also breaks anything.
The problem with new line characters remains, but it really seems to be a different issue. In fact, can multi-line completion be useful in some cases? Maybe it is eshell that should tell the completion mode to stop when a command has been entered. I want to know how SPC works in the current scheme. RET should do the same in eshell.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2020-02-29 7:56 ` Ivan Kozlov
@ 2020-02-29 9:02 ` Ivan Kozlov
2020-02-29 9:33 ` Ivan Kozlov
1 sibling, 0 replies; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 9:02 UTC (permalink / raw)
To: 36733
29.02.2020, 10:56, "Ivan Kozlov" <kanichos@yandex.ru>:
>Maybe it is eshell that should tell the completion mode to stop when a command has been entered.
Yes, it must be the way.
(defun eshell-send-input (&optional use-region queue-p no-newline)
"Send the input received to Eshell for parsing and processing.
After `eshell-last-output-end', sends all text from that marker to
point as input. Before that marker, calls `eshell-get-old-input' to
retrieve old input, copies it to the end of the buffer, and sends it.
If USE-REGION is non-nil, the current region (between point and mark)
will be used as input.
If QUEUE-P is non-nil, input will be queued until the next prompt,
rather than sent to the currently active process. If no process, the
input is processed immediately.
If NO-NEWLINE is non-nil, the input is sent without an implied final
newline."
(interactive "P")
;; Note that the input string does not include its terminal newline.
(let ((proc-running-p (and (eshell-interactive-process)
(not queue-p)))
(inhibit-point-motion-hooks t)
(inhibit-modification-hooks t))
+ (completion-in-region-mode -1)
(unless (and proc-running-p
(not (eq (process-status
(eshell-interactive-process))
'run)))
The bug is gone. With my two changes, all is good.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion
2020-02-29 7:56 ` Ivan Kozlov
2020-02-29 9:02 ` Ivan Kozlov
@ 2020-02-29 9:33 ` Ivan Kozlov
1 sibling, 0 replies; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 9:33 UTC (permalink / raw)
To: 36733
29.02.2020, 10:56, "Ivan Kozlov" <kanichos@yandex.ru>:
>It works. I don’t know if it also breaks anything.
Of course, it breaks completion from an empty pattern. Now I genuinely have no idea what to do.
^ permalink raw reply [flat|nested] 20+ messages in thread
* bug#36733: (no subject)
2020-02-29 1:30 ` bug#36733: (no subject) Ivan Kozlov
@ 2020-02-29 9:40 ` Ivan Kozlov
0 siblings, 0 replies; 20+ messages in thread
From: Ivan Kozlov @ 2020-02-29 9:40 UTC (permalink / raw)
To: 36733@debbugs.gnu.org
29.02.2020, 04:30, "Ivan Kozlov" <kanichos@yandex.ru>:
>One further example: when complete-in-region-mode is active (again, _apparently_) and there is some text before the point, typing * (the asterisk character) runs some undocumented command which completes the argument if there is exactly one possible completion and doesn’t do anything otherwise, so it’s like TAB without the *Completions* buffer.
>
>So typing ls a<TAB>/* will produce ls a/b if b is the only file in a/, and ls a/ otherwise.
>
>This makes entering glob patterns (one of the most common tasks in shell) a *giant pain* with constantly hitting C-g and what not to make the completion stuff go away. I have no idea whether using * for the command was a deliberate decision, but it is really bad.
>
>Moreover, typing \ inserts \<TAB>! This one is inexplicable. It makes quoting characters a giant pain with constantly erasing the tab or cancelling the completion garbage as above.
I now realise what is actually going on here. Typing * and \ when completion-in-region-mode is active is exactly equivalent to activating this mode from a pattern ending in these characters.
In other words, a<TAB>* is equivalent to a*<TAB>, and a<TAB>\ is equivalent to a\<TAB>, which is actually supposed to allow escaping TAB.
Awful. The two cases should be treated completely differently.
^ permalink raw reply [flat|nested] 20+ messages in thread
end of thread, other threads:[~2020-02-29 9:40 UTC | newest]
Thread overview: 20+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-07-19 21:21 bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Jean Louis
2019-07-20 7:16 ` Eli Zaretskii
2019-07-20 7:50 ` Jean Louis
2019-07-20 8:31 ` Eli Zaretskii
2019-07-20 9:07 ` Jean Louis
2019-07-20 10:08 ` Eli Zaretskii
2019-07-20 10:31 ` Jean Louis
2019-07-20 10:55 ` Eli Zaretskii
2019-07-20 15:28 ` Jean Louis
2019-07-20 15:56 ` Eli Zaretskii
2019-07-20 16:22 ` Jean Louis
2019-07-20 16:40 ` Eli Zaretskii
2020-02-29 1:30 ` bug#36733: (no subject) Ivan Kozlov
2020-02-29 9:40 ` Ivan Kozlov
2020-02-29 3:51 ` bug#36733: 27.0.50; Eshell taking long time to enter directory after TAB completion Ivan Kozlov
2020-02-29 6:40 ` Ivan Kozlov
2020-02-29 7:24 ` Ivan Kozlov
2020-02-29 7:56 ` Ivan Kozlov
2020-02-29 9:02 ` Ivan Kozlov
2020-02-29 9:33 ` Ivan Kozlov
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