GNU bug report logs -
#16197
24.3.50; no completion on commands following "sudo" in shell and eshell
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Reported by: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Date: Fri, 20 Dec 2013 08:20:01 UTC
Severity: minor
Tags: fixed, patch
Found in version 24.3.50
Fixed in version 28.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
Hi all,
shell and eshell are not completing commands after "sudo".
For eshell what is needed is a `pcomplete/sudo' function:
--8<---------------cut here---------------start------------->8---
(defun pcomplete/sudo ()
(let ((prec (pcomplete-arg 'last -1)))
(cond ((string= "sudo" prec)
(while (pcomplete-here*
(funcall pcomplete-command-completion-function)
(pcomplete-arg 'last) t))))))
--8<---------------cut here---------------end--------------->8---
For shell modify `shell-command-completion' something like this:
--8<---------------cut here---------------start------------->8---
(defun shell-command-completion ()
"Return the completion data for the command at point, if any."
(let ((filename (comint-match-partial-filename))
start)
(if (and filename
(save-match-data (not (string-match "[~/]" filename)))
(eq (setq start (match-beginning 0))
(save-excursion (shell-backward-command 1)
(if (looking-at "sudo")
start (point)))))
(shell--command-completion-data))))
--8<---------------cut here---------------end--------------->8---
In GNU Emacs 24.3.50.2 (x86_64-unknown-linux-gnu, X toolkit)
of 2013-12-19 on dell-14z
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
System Description: Ubuntu 12.04.3 LTS
Configured using:
`configure --with-x-toolkit=lucid --without-toolkit-scroll-bars
--without-gconf --without-gsettings'
Important settings:
value of $LC_MONETARY: fr_FR.UTF-8
value of $LC_NUMERIC: fr_FR.UTF-8
value of $LC_TIME: fr_FR.UTF-8
value of $LANG: fr_FR.UTF-8
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
diff-auto-refine-mode: t
TeX-PDF-mode: t
psession-mode: t
global-semanticdb-minor-mode: t
global-semantic-idle-scheduler-mode: t
semantic-mode: t
golden-ratio-mode: t
winner-mode: t
global-undo-tree-mode: t
undo-tree-mode: t
auto-image-file-mode: t
eldoc-in-minibuffer-mode: t
show-paren-mode: t
display-time-mode: t
recentf-mode: t
savehist-mode: t
eldoc-mode: t
minibuffer-depth-indicate-mode: t
helm-mode: t
helm-descbinds-mode: t
shell-dirtrack-mode: t
helm-adaptative-mode: t
helm-match-plugin-mode: t
helm-occur-match-plugin-mode: t
tooltip-mode: t
electric-indent-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
<right> <right> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
s t a r t C-M-x <f11> s h s u d o SPC f d <tab> <down>
<return> C-x C-b <return> <up> <up> <up> <up> <up>
<up> <up> <up> <up> <up> <up> <up> <down> <down> <down>
<down> <down> <down> <down> <up> <up> <up> <up> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> C-M-SPC M-w <f11> s h <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> c a t SPC . e m
a c s <tab> <return> SPC | SPC s u d o SPC g r <tab>
e p <down> <return> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> C-x
C-b <return> <down> <down> <down> <down> <down> <down>
<down> <down> <down> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <f11> s h s u d o SPC a p t
- g <tab> SPC | SPC g r <tab> <down> <down> <down>
<down> e <down> <down> <down> <down> <down> <down>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <down> <return> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> C-x C-b <return> <up> M-x r e p o r t
<return>
Recent messages:
Result: 34 (#o42, #x22, ?\")
Result: 34 (#o42, #x22, ?\")
Result: nil
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Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
> Hi all,
> shell and eshell are not completing commands after "sudo".
>
> For eshell what is needed is a `pcomplete/sudo' function:
>
> (defun pcomplete/sudo ()
> (let ((prec (pcomplete-arg 'last -1)))
> (cond ((string= "sudo" prec)
> (while (pcomplete-here*
> (funcall pcomplete-command-completion-function)
> (pcomplete-arg 'last) t))))))
>
> For shell modify `shell-command-completion' something like this:
>
> (defun shell-command-completion ()
> "Return the completion data for the command at point, if any."
> (let ((filename (comint-match-partial-filename))
> start)
> (if (and filename
> (save-match-data (not (string-match "[~/]" filename)))
> (eq (setq start (match-beginning 0))
> (save-excursion (shell-backward-command 1)
> (if (looking-at "sudo")
> start (point)))))
> (shell--command-completion-data))))
>
However this is not enough if one wants completion on arguments entered
after the command that is after "sudo".
For this the pcomplete/sudo function should looks like this:
--8<---------------cut here---------------start------------->8---
(defun pcomplete/sudo ()
(let ((prec (pcomplete-arg 'last -1)))
(cond ((string= "sudo" prec)
(while (pcomplete-here*
(funcall pcomplete-command-completion-function)
(pcomplete-arg 'last) t)))
(t
(funcall (or (pcomplete-find-completion-function
(pcomplete-command-name))
pcomplete-default-completion-function))))))
--8<---------------cut here---------------end--------------->8---
However it still not working with this definition because
`pcomplete-command-name' is bad defined, thus it is crashing emacs
maybe because it sometimes try to do (file-name-nondirectory nil).
(Haven't debugged this yet).
So the function should be redefined something like this:
--8<---------------cut here---------------start------------->8---
(defun pcomplete-command-name ()
"Return the command name of the first argument."
(let ((com (pcomplete-arg 'first))
(com1 (pcomplete-arg 'first 1))
(com2 (pcomplete-arg 'last -1))
(com3 (pcomplete-arg 'last)))
(cond ((and (stringp com) (stringp com1)
(not (string= com1 ""))
(string= com "sudo"))
(file-name-nondirectory com1))
((and (stringp com2) (string= com2 "sudo")
(not (string= com3 "")))
(file-name-nondirectory com3))
(t
(file-name-nondirectory com)))))
--8<---------------cut here---------------end--------------->8---
With this I have completion on arguments of commands entered after
"sudo" (only in eshell though, not shell for the moment) and emacs is
not crashing when hitting TAB.
--
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Message #11 received at submit <at> debbugs.gnu.org (full text, mbox):
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
> With this I have completion on arguments of commands entered after
> "sudo" (only in eshell though, not shell for the moment) and emacs is
> not crashing when hitting TAB.
Now I have the completion in shell also, for this
`shell-command-completion' have to be redefined.
--8<---------------cut here---------------start------------->8---
(defun shell-command-completion ()
"Return the completion data for the command at point, if any."
(let ((filename (comint-match-partial-filename))
(args (split-string
(buffer-substring-no-properties
(point) (save-excursion (shell-backward-command 1) (point))))))
(if (and filename
(save-match-data (not (string-match "[~/]" filename)))
(and (string= (car args) "sudo")
(string= filename (cadr args))))
(shell--command-completion-data))))
--8<---------------cut here---------------end--------------->8---
HTH, though the crash happening above should not happen.
--
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Message #14 received at submit <at> debbugs.gnu.org (full text, mbox):
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
> Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
>
>> With this I have completion on arguments of commands entered after
>> "sudo" (only in eshell though, not shell for the moment) and emacs is
>> not crashing when hitting TAB.
>
> Now I have the completion in shell also, for this
> `shell-command-completion' have to be redefined.
>
> (defun shell-command-completion ()
> "Return the completion data for the command at point, if any."
> (let ((filename (comint-match-partial-filename))
> (args (split-string
> (buffer-substring-no-properties
> (point) (save-excursion (shell-backward-command 1) (point))))))
> (if (and filename
> (save-match-data (not (string-match "[~/]" filename)))
> (and (string= (car args) "sudo")
> (string= filename (cadr args))))
> (shell--command-completion-data))))
>
> HTH, though the crash happening above should not happen.
So now my completion commands are working both with sudo and without,
the needed modifications are here if somebody is interested to fix this bug:
https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
Note that all pcomplete/* commands provided in emacs are not working
with "sudo".
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Message #17 received at submit <at> debbugs.gnu.org (full text, mbox):
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
> So now my completion commands are working both with sudo and without,
> the needed modifications are here if somebody is interested to fix this bug:
>
> https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
>
> Note that all pcomplete/* commands provided in emacs are not working
> with "sudo".
They are now working (pcomplete/tar etc...) with the last version of
pcomplete-extension.el, but entering multiples args (with and without
sudo and from emacs- Q) is not working at all (on second arg it try to
complete filenames) e.g
(cursor is "!")
emacs -Q
M-x shell
tar -! TAB => ok I have completion on options.
tar -z -! TAB => I have completion on filenames.
Maybe because you are using pcomplete-match with an hard coded value of
0 for index.(Not tested)
Completions provided in pcomplete-extension.el are allowing doing this
when needed.
--
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Message #20 received at 16197 <at> debbugs.gnu.org (full text, mbox):
> Maybe because you are using pcomplete-match with an hard coded value of
> 0 for index.(Not tested)
Not sure who "you" is. I'm afraid your description of the problem,
solutions, and problems of those solutions is a bit too cryptic for me.
Here's my starting point:
- I understand that currently pcomplete does not provide completion for
"sudo" and it would be nice to add it.
- "sudo" is not particularly special, so whatever solution is used for
it should also work for many other commands.
- There is already pcomplete/xargs and pcomplete/rsh.
Can pcomplete/sudo use the same approach as pcomplete/xargs and pcomplete/rsh?
If not, why not?
If yes but there are still problems, do those problems also affect
pcomplete/xargs and pcomplete/rsh?
If not, why not?
If yes, then let's first focus on fixing pcomplete/xargs.
Stefan
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Message #23 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
>> Maybe because you are using pcomplete-match with an hard coded value of
>> 0 for index.(Not tested)
>
> Not sure who "you" is.
Whoever wrote pcomplete/tar.
> I'm afraid your description of the problem, solutions, and problems of
> those solutions is a bit too cryptic for me.
>
> Here's my starting point:
> - I understand that currently pcomplete does not provide completion for
> "sudo" and it would be nice to add it.
> - "sudo" is not particularly special, so whatever solution is used for
> it should also work for many other commands.
> - There is already pcomplete/xargs and pcomplete/rsh.
Don't know what */rsh does, but */xargs is actually not working.
Same for tar as described in previous posts.
> Can pcomplete/sudo use the same approach as pcomplete/xargs and pcomplete/rsh?
> If not, why not?
Well I didn't read */xargs, but here are the problems:
- `pcomplete-command-name' actually is always returning the first arg of
command line e.g for "sudo apt-get" it is returning "sudo".
- `shell-command-completion' is trying to complete after what
`shell-backward-command' returns, which is actually the first command
near prompt or "[&;|]+ ", so when you try to complete after sudo or
xargs, you call the completion against "sudo" or "xargs" which returns
nothing of course.
Actually the fix made to these two functions is affecting only sudo, but
I can easily fix it to handle also 'xargs'.
> If yes but there are still problems, do those problems also affect
> pcomplete/xargs and pcomplete/rsh?
> If not, why not?
>
> If yes, then let's first focus on fixing pcomplete/xargs.
Don't think so, I think the problem should be fixed at another level as
descripted above.
You can look at the code here:
https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
--
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Message #26 received at submit <at> debbugs.gnu.org (full text, mbox):
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
> You can look at the code here:
>
> https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
I have fixed code for xargs.
I also have a look at `pcomplete/xargs':
As explained previously it it just calling `shell-command-completion',
which is looking at the first arg returned by `shell-backward-command'.
At best it would work with a command line starting with 'xargs' which is
not really useful, but it doesn't anyway, try it in emacs -Q.
I also find pcomplete/ssh:
It complete args but only the first not the second. i.e ssh -f -! =>no
completions.
Probably others have this problem.
--
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Message #29 received at 16197 <at> debbugs.gnu.org (full text, mbox):
> Don't know what */rsh does, but */xargs is actually not working.
Aha!
> Well I didn't read */xargs, but here are the problems:
> - `pcomplete-command-name' actually is always returning the first arg of
> command line e.g for "sudo apt-get" it is returning "sudo".
> - `shell-command-completion' is trying to complete after what
> `shell-backward-command' returns, which is actually the first command
> near prompt or "[&;|]+ ", so when you try to complete after sudo or
> xargs, you call the completion against "sudo" or "xargs" which returns
> nothing of course.
Can you describe those problems in terms of user-visible behavior
(i.e. a recipe) so I can better understand what the code does (and
should do instead)?
> Actually the fix made to these two functions is affecting only sudo, but
> I can easily fix it to handle also 'xargs'.
That would be nice.
> Don't think so, I think the problem should be fixed at another level as
> descripted above.
I missed the description, I'm afraid.
> https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
Not sure what I should look at there.
Can you send it as a patch against pcmpl-unix.el to fix pcomplete/xargs
(and add pcomplete/sudo at the same time)?
Stefan
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Message #32 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
>> Don't know what */rsh does, but */xargs is actually not working.
>
> Aha!
>
>> Well I didn't read */xargs, but here are the problems:
>
>> - `pcomplete-command-name' actually is always returning the first arg of
>> command line e.g for "sudo apt-get" it is returning "sudo".
>
>> - `shell-command-completion' is trying to complete after what
>> `shell-backward-command' returns, which is actually the first command
>> near prompt or "[&;|]+ ", so when you try to complete after sudo or
>> xargs, you call the completion against "sudo" or "xargs" which returns
>> nothing of course.
>
> Can you describe those problems in terms of user-visible behavior
> (i.e. a recipe) so I can better understand what the code does (and
> should do instead)?
(! is the cursor)
emacs -Q
M-x shell
$ find . -name '*.el' | xargs et!
Press TAB, nothing, no completion against "et".
M-: (shell-backward-command)
I have now the cursor at xargs:
$ find . -name '*.el' | !xargs et
To provide completion against "et" I should have the cursor at:
$ find . -name '*.el' | xargs !et
after evaling (shell-backward-command).
Now download and load:
https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
And repeat the same recipe.
For `pcomplete-command-name' it is harder to give a recipe, the best is
to edebug it to have an idea (be careful the actual version is crashing
emacs sometimes).
>> Actually the fix made to these two functions is affecting only sudo, but
>> I can easily fix it to handle also 'xargs'.
>
> That would be nice.
Done in pcomplete-extension.el.
>> Don't think so, I think the problem should be fixed at another level as
>> descripted above.
>
> I missed the description, I'm afraid.
>
>> https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
>
> Not sure what I should look at there.
- pcomplete/sudo
- shell-backward-command
- pcomplete-command-name
> Can you send it as a patch against pcmpl-unix.el to fix pcomplete/xargs
> (and add pcomplete/sudo at the same time)?
Not only against pcmpl-unix.el I think:
* pcmpl-unix.el: Add `pcomplete/sudo'.
* pcomplete.el: Redefine `pcomplete-command-name'.
* shell.el: Redefine `shell-backward-command'.
Not urgent:
I would be happy to give also pcomplete/find,hg,ls,apt-get.
Not sure where they would go in this case, pcmpl-linux? unix? gnu?
Also more things to fix are `pcomplete/tar', `pcomplete/ssh' and maybe
others (allow completion on more than one arg), but I haven't worked on
this already.
--
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Message #35 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
>> https://github.com/thierryvolpiatto/emacs-tv-config/blob/master/pcomplete-extension.el
>
> Not sure what I should look at there.
For a quick test, you can load this file and do the following tests in
`shell' and/or `eshell':
;; Tests
;; find . -name '*.el' | xargs et =>ok
;; sudo apt-g =>ok
;; sudo apt-get in =>ok
;; sudo apt-get -- =>ok
;; sudo apt-get - =>ok
;; sudo apt-get -V - =>ok
;; sudo apt-get -V -- =>ok
;; sudo apt-get --reinstall ins =>ok
;; sudo apt-get --reinstall install em =>ok
;; sudo - =>ok
;; sudo -p "pass" - =>ok
;; sudo -p "pass" apt-g =>ok
;; sudo -p "pass" apt-get ins =>ok
;; apt-get in =>ok
;; apt-get install em =>ok
Tell me if something went wrong on these tests or if you have other
cases that are not working.
NOTE: [...] | xargs -0 foo
is not working yet because args are not handled in pcomplete/xargs.
I would do it later if you accept the patch below.
> Can you send it as a patch against pcmpl-unix.el to fix pcomplete/xargs
> (and add pcomplete/sudo at the same time)?
* lisp/pcml-unix.el (pcomplete/sudo): New.
* lisp/pcomplete.el (pcomplete-command-name): Allow extracting command-name in more complex command lines.
* lisp/shell.el (shell-command-completion-function): Fix it (was not working at all).
--8<---------------cut here---------------start------------->8---
Changes from master to stash
3 files changed, 52 insertions(+), 4 deletions(-)
lisp/pcmpl-unix.el | 16 ++++++++++++++++
lisp/pcomplete.el | 35 ++++++++++++++++++++++++++++++++++-
lisp/shell.el | 5 ++---
Modified lisp/pcmpl-unix.el
diff --git a/lisp/pcmpl-unix.el b/lisp/pcmpl-unix.el
index 6ac3e15..1c55f67 100644
--- a/lisp/pcmpl-unix.el
+++ b/lisp/pcmpl-unix.el
@@ -215,6 +215,22 @@ Includes files as well as host names followed by a colon."
(pcmpl-ssh-hosts)))))))
(complete-with-action action table string pred))))))
+(defun pcomplete/sudo ()
+ (let ((pcomplete-cmd-name (pcomplete-command-name)))
+ (while (and (string= "sudo" pcomplete-cmd-name)
+ (pcomplete-match "^-" 'last))
+ (when (< pcomplete-index pcomplete-last)
+ (pcomplete-next-arg))
+ (pcomplete-opt "AbCDEegHhiKknPpSsUuVv-"))
+ (cond ((string= "sudo" pcomplete-cmd-name)
+ (while (pcomplete-here*
+ (funcall pcomplete-command-completion-function)
+ (pcomplete-arg 'last) t)))
+ (t
+ (funcall (or (pcomplete-find-completion-function
+ pcomplete-cmd-name)
+ pcomplete-default-completion-function))))))
+
(provide 'pcmpl-unix)
;;; pcmpl-unix.el ends here
Modified lisp/pcomplete.el
diff --git a/lisp/pcomplete.el b/lisp/pcomplete.el
index dbeefda..68351e2 100644
--- a/lisp/pcomplete.el
+++ b/lisp/pcomplete.el
@@ -633,9 +633,42 @@ user actually typed in."
(message "No completions")
(throw 'pcompleted nil))))
+(defvar pcomplete-special-commands '("sudo" "xargs"))
(defun pcomplete-command-name ()
"Return the command name of the first argument."
- (file-name-nondirectory (pcomplete-arg 'first)))
+ (let ((coms (cl-loop with lst = (reverse (pcomplete-parse-arguments))
+ for str in (or (member "|" lst)
+ (member "||" lst)
+ (member "&" lst)
+ (member ";" lst)
+ lst)
+ for exec = (or (executable-find str)
+ ;; `executable-find' or 'which'
+ ;; doesn't return these paths.
+ (car (member str '("cd" "pushd" "popd"))))
+ when exec collect exec)))
+ (file-name-nondirectory
+ ;; we may have commands embeded in executables that looks
+ ;; like executables (e.g apt-get install).
+ ;; Assume that all executables are using only one command
+ ;; like this.
+ ;; e.g - if we have (install apt-get sudo)
+ ;; what we want is apt-get.
+ ;; - if we have (apt-get sudo)
+ ;; what we want is sudo,
+ ;; then pcomplete/sudo will check if
+ ;; a pcomplete handler exists for apt-get.
+ (cond (;; e.g (install apt-get sudo)
+ (> (length coms) 2) (cadr coms))
+ (;; e.g (apt-get sudo)
+ (and (= (length coms) 2)
+ (member (file-name-nondirectory (cadr coms))
+ pcomplete-special-commands))
+ (car coms))
+ (;; e.g (sudo)
+ (= (length coms) 1) (car coms))
+ (t ;; e.g (install apt-get)
+ (cadr coms))))))
(defun pcomplete-match (regexp &optional index offset start)
"Like `string-match', but on the current completion argument."
Modified lisp/shell.el
diff --git a/lisp/shell.el b/lisp/shell.el
index 1d67f0b..5bb6a91 100644
--- a/lisp/shell.el
+++ b/lisp/shell.el
@@ -447,9 +447,8 @@ Thus, this does not include the shell's current directory.")
This is the value of `pcomplete-command-completion-function' for
--8<---------------cut here---------------end--------------->8---
Shell buffers. It implements `shell-completion-execonly' for
`pcomplete' completion."
- (pcomplete-here (pcomplete-entries nil
- (if shell-completion-execonly
- 'file-executable-p))))
+ (let ((data (shell--command-completion-data)))
+ (and data (pcomplete-here (all-completions "" (nth 2 data))))))
(defun shell-completion-vars ()
"Setup completion vars for `shell-mode' and `read-shell-command'."
--
Thierry
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Message #38 received at 16197 <at> debbugs.gnu.org (full text, mbox):
After applying the patch on previous mail, that among other things fix:
[...] | xargs <completion>
but not
[...] | xargs -<arg> <completion>
This definition of pcomplete/xargs fix it:
--8<---------------cut here---------------start------------->8---
(defun pcomplete/xargs ()
"Completion for `xargs'."
(let ((pcomplete-cmd-name (pcomplete-command-name)))
(cond ((string= "xargs" pcomplete-cmd-name)
(while (pcomplete-here*
(funcall pcomplete-command-completion-function)
(pcomplete-arg 'last) t)))
(t (funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
pcomplete-default-completion-function))))))
--8<---------------cut here---------------end--------------->8---
Note that there is no completion on the args, but that could be done
later (no urge for this).
--
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Message #41 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
>> Can you send it as a patch against pcmpl-unix.el to fix pcomplete/xargs
>> (and add pcomplete/sudo at the same time)?
>
> * lisp/pcml-unix.el (pcomplete/sudo): New.
> * lisp/pcomplete.el (pcomplete-command-name): Allow extracting
> command-name in more complex command lines.
> * lisp/shell.el (shell-command-completion-function): Fix it (was not
> working at all).
There was unfortunately no followup to this at the time. I've now
respun the patch and tried to do some testing, but... this doesn't seem
to work?
Here's how I tested:
1) Apply the patch
2) Build Emacs
3) emacs -Q
f) M-x shell
IV) sudo apt-g<TAB>
Result: "No match"
I'm not very familiar with the completion framework, and the code has
changed over the years... Anybody?
diff --git a/lisp/pcmpl-unix.el b/lisp/pcmpl-unix.el
index 74f45b9523..0096020ab4 100644
--- a/lisp/pcmpl-unix.el
+++ b/lisp/pcmpl-unix.el
@@ -82,9 +82,13 @@ pcomplete/rm
;;;###autoload
(defun pcomplete/xargs ()
"Completion for `xargs'."
- (pcomplete-here (funcall pcomplete-command-completion-function))
- (funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
- pcomplete-default-completion-function)))
+ (let ((pcomplete-cmd-name (pcomplete-command-name)))
+ (cond ((string= "xargs" pcomplete-cmd-name)
+ (while (pcomplete-here*
+ (funcall pcomplete-command-completion-function)
+ (pcomplete-arg 'last) t)))
+ (t (funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
+ pcomplete-default-completion-function))))))
;;;###autoload
(defalias 'pcomplete/time 'pcomplete/xargs)
@@ -240,6 +244,22 @@ pcomplete/rsh
(funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
pcomplete-default-completion-function)))
+(defun pcomplete/sudo ()
+ (let ((pcomplete-cmd-name (pcomplete-command-name)))
+ (while (and (string= "sudo" pcomplete-cmd-name)
+ (pcomplete-match "^-" 'last))
+ (when (< pcomplete-index pcomplete-last)
+ (pcomplete-next-arg))
+ (pcomplete-opt "AbCDEegHhiKknPpSsUuVv-"))
+ (cond ((string= "sudo" pcomplete-cmd-name)
+ (while (pcomplete-here*
+ (funcall pcomplete-command-completion-function)
+ (pcomplete-arg 'last) t)))
+ (t
+ (funcall (or (pcomplete-find-completion-function
+ pcomplete-cmd-name)
+ pcomplete-default-completion-function))))))
+
(provide 'pcmpl-unix)
;;; pcmpl-unix.el ends here
diff --git a/lisp/pcomplete.el b/lisp/pcomplete.el
index 014f9628b9..9ac4652126 100644
--- a/lisp/pcomplete.el
+++ b/lisp/pcomplete.el
@@ -119,6 +119,7 @@
;;; Code:
(require 'comint)
+(eval-when-compile (require 'cl-lib))
(defgroup pcomplete nil
"Programmable completion."
@@ -674,9 +675,42 @@ pcomplete-next-arg
(message "No completions")
(throw 'pcompleted nil))))
+(defvar pcomplete-special-commands '("sudo" "xargs"))
(defun pcomplete-command-name ()
"Return the command name of the first argument."
- (file-name-nondirectory (pcomplete-arg 'first)))
+ (let ((coms (cl-loop with lst = (reverse (pcomplete-parse-arguments))
+ for str in (or (member "|" lst)
+ (member "||" lst)
+ (member "&" lst)
+ (member ";" lst)
+ lst)
+ for exec = (or (executable-find str)
+ ;; `executable-find' or 'which'
+ ;; doesn't return these paths.
+ (car (member str '("cd" "pushd" "popd"))))
+ when exec collect exec)))
+ (file-name-nondirectory
+ ;; we may have commands embeded in executables that looks
+ ;; like executables (e.g apt-get install).
+ ;; Assume that all executables are using only one command
+ ;; like this.
+ ;; e.g - if we have (install apt-get sudo)
+ ;; what we want is apt-get.
+ ;; - if we have (apt-get sudo)
+ ;; what we want is sudo,
+ ;; then pcomplete/sudo will check if
+ ;; a pcomplete handler exists for apt-get.
+ (cond (;; e.g (install apt-get sudo)
+ (> (length coms) 2) (cadr coms))
+ (;; e.g (apt-get sudo)
+ (and (= (length coms) 2)
+ (member (file-name-nondirectory (cadr coms))
+ pcomplete-special-commands))
+ (car coms))
+ (;; e.g (sudo)
+ (= (length coms) 1) (car coms))
+ (t ;; e.g (install apt-get)
+ (cadr coms))))))
(defun pcomplete-match (regexp &optional index offset start)
"Like `string-match', but on the current completion argument."
diff --git a/lisp/shell.el b/lisp/shell.el
index 9667dab2af..48eb69f0b6 100644
--- a/lisp/shell.el
+++ b/lisp/shell.el
@@ -460,9 +460,8 @@ shell-command-completion-function
This is the value of `pcomplete-command-completion-function' for
Shell buffers. It implements `shell-completion-execonly' for
`pcomplete' completion."
- (pcomplete-here (pcomplete-entries nil
- (if shell-completion-execonly
- 'file-executable-p))))
+ (let ((data (shell--command-completion-data)))
+ (and data (pcomplete-here (all-completions "" (nth 2 data))))))
(defun shell-completion-vars ()
"Setup completion vars for `shell-mode' and `read-shell-command'."
--
(domestic pets only, the antidote for overdose, milk.)
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Added tag(s) patch.
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Message #46 received at 16197 <at> debbugs.gnu.org (full text, mbox):
> emacs -Q
> M-x shell
> $ find . -name '*.el' | xargs et!
> Press TAB, nothing, no completion against "et".
The patch below seems to address this problem for me.
Now I can do
M-x shell
% xargs cv TAB
and I get a list is commands starting with "cv"; and
% xargs cvs TAB
lists `cvs`s subcommands.
> M-: (shell-backward-command)
> I have now the cursor at xargs:
That seems right to me. I think changing it the way you describe could
lead to more problems down the line for cases where
`shell-backward-command` is used for other purposes.
> $ find . -name '*.el' | !xargs et
> To provide completion against "et" I should have the cursor at:
> $ find . -name '*.el' | xargs !et
> after evaling (shell-backward-command).
The beginning of the command is definitely "xargs" and not "et".
The fact that the first arg to the command is itself a command shouldn't
change where is the beginning of the command here, I think.
> For `pcomplete-command-name' it is harder to give a recipe, the best is
> to edebug it to have an idea (be careful the actual version is crashing
> emacs sometimes).
Same here, I'd think that the "command name" is "xargs", but rather than
argue about this philosophical point, it's probably better to focus on
more concrete cases where this return value is a problem.
Stefan
diff --git a/lisp/pcmpl-unix.el b/lisp/pcmpl-unix.el
index dc0d729849..27584c27a7 100644
--- a/lisp/pcmpl-unix.el
+++ b/lisp/pcmpl-unix.el
@@ -83,7 +83,7 @@ pcomplete/rm
;;;###autoload
(defun pcomplete/xargs ()
"Completion for `xargs'."
- (pcomplete-here (funcall pcomplete-command-completion-function))
+ (funcall pcomplete-command-completion-function)
(funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
pcomplete-default-completion-function)))
diff --git a/lisp/shell.el b/lisp/shell.el
index e574aac99d..d2c41a9690 100644
--- a/lisp/shell.el
+++ b/lisp/shell.el
@@ -461,9 +461,12 @@ shell-command-completion-function
This is the value of `pcomplete-command-completion-function' for
Shell buffers. It implements `shell-completion-execonly' for
`pcomplete' completion."
- (pcomplete-here (pcomplete-entries nil
- (if shell-completion-execonly
- 'file-executable-p))))
+ (if (pcomplete-match "/")
+ (pcomplete-here (pcomplete-entries nil
+ (if shell-completion-execonly
+ 'file-executable-p)))
+ (pcomplete-here
+ (nth 2 (shell--command-completion-data)))))
(defun shell-completion-vars ()
"Setup completion vars for `shell-mode' and `read-shell-command'."
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Message #49 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
> Same here, I'd think that the "command name" is "xargs", but rather than
> argue about this philosophical point, it's probably better to focus on
> more concrete cases where this return value is a problem.
I think I read somewhere that Thierry is no longer working on Emacs
stuff... Let's see... Oh, here:
https://news.ycombinator.com/item?id=24449883
Hm, that's only about Helm...
Anyway, this doesn't help with the sudo case, I guess?
--
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bloggy blog: http://lars.ingebrigtsen.no
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Message #52 received at 16197 <at> debbugs.gnu.org (full text, mbox):
>> Same here, I'd think that the "command name" is "xargs", but rather than
>> argue about this philosophical point, it's probably better to focus on
>> more concrete cases where this return value is a problem.
>
> I think I read somewhere that Thierry is no longer working on Emacs
> stuff... Let's see... Oh, here:
>
> https://news.ycombinator.com/item?id=24449883
>
> Hm, that's only about Helm...
>
> Anyway, this doesn't help with the sudo case, I guess?
The sudo case is the same as xargs, so it's a simple matter of
duplicating the pcomplete/xargs (or making an alias) as in the patch below.
Stefan
diff --git a/lisp/pcmpl-unix.el b/lisp/pcmpl-unix.el
index dc0d729849..8d4e7ea33d 100644
--- a/lisp/pcmpl-unix.el
+++ b/lisp/pcmpl-unix.el
@@ -83,10 +83,14 @@ pcomplete/rm
;;;###autoload
(defun pcomplete/xargs ()
"Completion for `xargs'."
- (pcomplete-here (funcall pcomplete-command-completion-function))
+ ;; FIXME: Add completion of xargs-specific arguments.
+ (funcall pcomplete-command-completion-function)
(funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
pcomplete-default-completion-function)))
+;; FIXME: Add completion of sudo-specific arguments.
+(defalias 'pcomplete/sudo #'pcomplete/xargs)
+
;;;###autoload
(defalias 'pcomplete/time 'pcomplete/xargs)
diff --git a/lisp/shell.el b/lisp/shell.el
index e574aac99d..d2c41a9690 100644
--- a/lisp/shell.el
+++ b/lisp/shell.el
@@ -461,9 +461,12 @@ shell-command-completion-function
This is the value of `pcomplete-command-completion-function' for
Shell buffers. It implements `shell-completion-execonly' for
`pcomplete' completion."
- (pcomplete-here (pcomplete-entries nil
- (if shell-completion-execonly
- 'file-executable-p))))
+ (if (pcomplete-match "/")
+ (pcomplete-here (pcomplete-entries nil
+ (if shell-completion-execonly
+ 'file-executable-p)))
+ (pcomplete-here
+ (nth 2 (shell--command-completion-data)))))
(defun shell-completion-vars ()
"Setup completion vars for `shell-mode' and `read-shell-command'."
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Message #55 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
> The sudo case is the same as xargs, so it's a simple matter of
> duplicating the pcomplete/xargs (or making an alias) as in the patch below.
Great! Are you applying this, then?
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bug#16197; Package
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(Mon, 28 Sep 2020 02:08:01 GMT)
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Message #58 received at 16197 <at> debbugs.gnu.org (full text, mbox):
>> The sudo case is the same as xargs, so it's a simple matter of
>> duplicating the pcomplete/xargs (or making an alias) as in the patch below.
> Great! Are you applying this, then?
Done,
Stefan
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bug#16197; Package
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(Mon, 28 Sep 2020 11:13:01 GMT)
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Message #61 received at 16197 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
>>> The sudo case is the same as xargs, so it's a simple matter of
>>> duplicating the pcomplete/xargs (or making an alias) as in the patch below.
>> Great! Are you applying this, then?
>
> Done,
>
> Stefan
Thanks; works fine, so I'm closing this bug report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Added tag(s) fixed.
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
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control <at> debbugs.gnu.org.
(Mon, 28 Sep 2020 11:13:02 GMT)
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bug marked as fixed in version 28.1, send any further explanations to
16197 <at> debbugs.gnu.org and Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
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control <at> debbugs.gnu.org.
(Mon, 28 Sep 2020 11:13:02 GMT)
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bug archived.
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(Mon, 26 Oct 2020 11:24:10 GMT)
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This bug report was last modified 3 years and 181 days ago.
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