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authorJuri Linkov <juri@linkov.net>2019-04-14 00:46:38 +0300
committerJuri Linkov <juri@linkov.net>2019-04-14 00:46:38 +0300
commit3a34f57c7e7ba355c1271c815213fb9c526b27f3 (patch)
treeefc1946d2ea3c54661e22cc1173de13efa880f67
parentad652a3b89848394a3613206082f233101b91f60 (diff)
downloademacs-3a34f57c7e7ba355c1271c815213fb9c526b27f3.tar.gz
* lisp/simple.el (shell-command-width): New defcustom.
(shell-command): Use it. (Bug#35055)
-rw-r--r--etc/NEWS5
-rw-r--r--lisp/simple.el18
2 files changed, 21 insertions, 2 deletions
diff --git a/etc/NEWS b/etc/NEWS
index 021d7d01799..d34fb3bb12a 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1064,6 +1064,11 @@ followed when Emacs writes the relevant history variables to the disk.
*** The variable 'shell-file-name' can be set now as connection-local
variable for remote shells. It still defaults to "/bin/sh".
+** Single shell commands
+
+*** 'shell-command-width' defines the number of output columns
+for asynchronous shell command.
+
** Pcomplete
*** The function 'pcomplete-uniquify-list' has been renamed from
diff --git a/lisp/simple.el b/lisp/simple.el
index 37f92540dde..017ba510007 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -3351,6 +3351,15 @@ is output."
:group 'shell
:version "26.1")
+(defcustom shell-command-width nil
+ "Number of columns available for asynchronous shell command output.
+If nil, use the shell default number (usually 80 columns).
+If a positive integer, use a fixed width for command output."
+ :type '(choice (const :tag "Use system limit" nil)
+ (integer :tag "Fixed width" :value 80))
+ :group 'shell
+ :version "27.1")
+
(defcustom shell-command-dont-erase-buffer nil
"If non-nil, output buffer is not erased between shell commands.
Also, a non-nil value sets the point in the output buffer
@@ -3614,8 +3623,13 @@ impose the use of a shell (with its need to quote arguments)."
(with-current-buffer buffer
(shell-command--save-pos-or-erase)
(setq default-directory directory)
- (setq proc
- (start-process-shell-command "Shell" buffer command))
+ (let ((process-environment
+ (if (natnump shell-command-width)
+ (cons (format "COLUMNS=%d" shell-command-width)
+ process-environment)
+ process-environment)))
+ (setq proc
+ (start-process-shell-command "Shell" buffer command)))
(setq mode-line-process '(":%s"))
(require 'shell) (shell-mode)
(set-process-sentinel proc #'shell-command-sentinel)