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[Emacs-diffs] master 85512e7 1/3: Allow async command output buffer to b
From: |
Reuben Thomas |
Subject: |
[Emacs-diffs] master 85512e7 1/3: Allow async command output buffer to be shown only on output |
Date: |
Mon, 7 Aug 2017 16:58:05 -0400 (EDT) |
branch: master
commit 85512e752191091d38cd5e34e7bed80eac1e9013
Author: Reuben Thomas <address@hidden>
Commit: Reuben Thomas <address@hidden>
Allow async command output buffer to be shown only on output
* lisp/simple.el (async-shell-command-display-buffer): Add
defcustom.
(shell-command): Use the new defcustom to determine whether to show
the buffer immediately, or add a process filter that shows it only
when there is some output.
* etc/NEWS: Document the new variable.
* doc/emacs/misc.texi: Likewise.
Thanks to Juri Linkov and Eli Zaretskii for advice and guidance.
---
doc/emacs/misc.texi | 5 +++++
etc/NEWS | 5 +++++
lisp/simple.el | 23 +++++++++++++++++++++--
3 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/doc/emacs/misc.texi b/doc/emacs/misc.texi
index 84681f2..73a6bae 100644
--- a/doc/emacs/misc.texi
+++ b/doc/emacs/misc.texi
@@ -742,6 +742,11 @@ this; e.g., whether to rename the pre-existing output
buffer, or to
use a different buffer for the new command. Consult the variable's
documentation for more possibilities.
address@hidden async-shell-command-display-buffer
+ If you want the output buffer for asynchronous shell commands to be
+displayed only when the command generates output, set
address@hidden to @code{nil}.
+
@kindex M-|
@findex shell-command-on-region
@kbd{M-|} (@code{shell-command-on-region}) is like @kbd{M-!}, but
diff --git a/etc/NEWS b/etc/NEWS
index b47bf95..58b0834 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -206,6 +206,11 @@ the behavior of 'shell-command', 'shell-command-on-region'
and
'async-shell-command' is as usual.
+++
+** The new user option 'async-shell-command-display-buffer' controls
+whether the output buffer of an asynchronous command is shown
+immediately, or only when there is output.
+
++++
** The new user option 'mouse-select-region-move-to-beginning'
controls the position of point when double-clicking mouse-1 on the end
of a parenthetical grouping or string-delimiter: the default value nil
diff --git a/lisp/simple.el b/lisp/simple.el
index 027ce39..9838f16 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -3279,6 +3279,17 @@ output buffer and running a new command in the default
buffer,
:group 'shell
:version "24.3")
+(defcustom async-shell-command-display-buffer t
+ "Whether to display the command buffer immediately.
+If t, display the buffer immediately; if nil, wait until there
+is output."
+ :type '(choice (const :tag "Display buffer immediately"
+ t)
+ (const :tag "Display buffer on output"
+ nil))
+ :group 'shell
+ :version "26.1")
+
(defun shell-command--save-pos-or-erase ()
"Store a buffer position or erase the buffer.
See `shell-command-dont-erase-buffer'."
@@ -3525,7 +3536,6 @@ the use of a shell (with its need to quote arguments)."
(setq buffer (get-buffer-create
(or output-buffer "*Async Shell
Command*"))))))
(with-current-buffer buffer
- (display-buffer buffer '(nil (allow-no-window . t)))
(shell-command--save-pos-or-erase)
(setq default-directory directory)
(setq proc (start-process "Shell" buffer shell-file-name
@@ -3536,7 +3546,16 @@ the use of a shell (with its need to quote arguments)."
;; Use the comint filter for proper handling of carriage
motion
;; (see `comint-inhibit-carriage-motion'),.
(set-process-filter proc 'comint-output-filter)
- ))
+ (if async-shell-command-display-buffer
+ (display-buffer buffer '(nil (allow-no-window . t)))
+ (add-function :before (process-filter proc)
+ `(lambda (process string)
+ (when (and (= 0 (buffer-size
(process-buffer process)))
+ (string= (buffer-name
(process-buffer process))
+ ,(or output-buffer "*Async
Shell Command*")))
+ (display-buffer (process-buffer
process))))
+ ))
+ ))
;; Otherwise, command is executed synchronously.
(shell-command-on-region (point) (point) command
output-buffer nil error-buffer)))))))