Package: emacs;
Reported by: Thierry Volpiatto <thievol <at> posteo.net>
Date: Thu, 26 Aug 2021 09:30:01 UTC
Severity: normal
Tags: moreinfo
Found in version 27.2
Fixed in version 28.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Thierry Volpiatto <thievol <at> posteo.net> To: 50209 <at> debbugs.gnu.org Subject: bug#50209: 27.2; eshell-command not working async Date: Thu, 26 Aug 2021 09:20:47 +0000
When running a command in eshell ending with "&" the command should not
block emacs, it should run asynchronously.
It seems it is broken since 2005:
;; 6b6f91b357f6fe2f1e0d72f046a1b8d8a2d6d8c3
;; Author: John Wiegley <johnw <at> newartisans.com>
;; AuthorDate: Fri May 27 02:57:18 2005 +0000
;; Commit: John Wiegley <johnw <at> newartisans.com>
;; CommitDate: Fri May 27 02:57:18 2005 +0000
To allow my eshell aliases ending with "&" working in helm-find-files I
use this advice:
(defun helm--advice-eshell-eval-command (command &optional input)
"Fix return value when command ends with \"&\"."
;; Fix this emacs commit which is plain wrong as it returns
;; either nil or an error (double because format spec doesn't
;; always match specifier) whereas it should return either a
;; single element (CAR DELIM) or DELIM itself if the car of
;; DELIM is a process.
;; This prevent running eshell-command async when needed i.e. when
;; command ends with "&".
;;
;; 6b6f91b357f6fe2f1e0d72f046a1b8d8a2d6d8c3
;; Author: John Wiegley <johnw <at> newartisans.com>
;; AuthorDate: Fri May 27 02:57:18 2005 +0000
;; Commit: John Wiegley <johnw <at> newartisans.com>
;; CommitDate: Fri May 27 02:57:18 2005 +0000
(if eshell-current-command
;; we can just stick the new command at the end of the current
;; one, and everything will happen as it should
(setcdr (last (cdr eshell-current-command))
(list `(let ((here (and (eobp) (point))))
,(and input
`(insert-and-inherit ,(concat input "\n")))
(if here
(eshell-update-markers here))
(eshell-do-eval ',command))))
(and eshell-debug-command
(with-current-buffer (get-buffer-create "*eshell last cmd*")
(erase-buffer)
(insert "command: \"" input "\"\n")))
(setq eshell-current-command command)
(let* ((delim (catch 'eshell-incomplete
(eshell-resume-eval)))
(val (car-safe delim)))
;; If the return value of `eshell-resume-eval' is wrapped in a
;; list, it indicates that the command was run asynchronously.
;; In that case, unwrap the value before checking the delimiter
;; value.
(if (and val
(not (processp val))
(not (eq val t)))
(error "Unmatched delimiter: %S" val)
;; Eshell-command expect a list like (<process>) to know if the
;; command should be async or not.
(or (and (processp val) delim) val)))))
In GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo version 1.15.10)
of 2021-03-25 built on IPadS340
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Linux Mint 19.3
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<#secure method=pgpmime mode=sign>
--
Thierry
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
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1994-97 Ian Jackson.