Questions tagged [comint]
is the command interpreter mode for interacting with external processes. Using the base comint-mode, Emacs provides derived modes for specific process-in-a-buffer. Common ones are shell, lisp, scheme, cmutex (for TeX and LaTeX). Support for programming languages with REPL interfaces, such as Haskell, are also derived from comint-mode. Such buffers share the same key bindings, shortcuts, and history manipulation facilities.
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How to get `comint` modes work with long lines?
When I paste a long (not that long) line in inferior-python-mode, the buffer sucks. For example,
"[{\"inputs\":[{\"internalType\":\"contract I_StarkwareContract\",\&...
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28
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How to turn on `read-only-mode` when running a command in `comint` buffers and turn off it when the command is finished?
I'd like to prevent all user inputs when a command is running in comint-like buffers (created by shell, run-python etc.) by enabling read-only-mode when I hit enter to run the command and disabling it ...
- 488
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61
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`shell-command` repeats my input characters multiple times
whenever I run this command (shell-command "chatgpt install &") my input characters gets repeated like this:
1> hi hi
Hello! How can I assist you today?
2> hi again hhii ...
- 1
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1
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21
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OSC 8 links not working in the Comint mode
According to the NEWS for Emacs 28.1 (Ctrl-f "OSC 8, for hyperlinks"), the comint-mode supports the OSC 8 styled links. But when I compile (interpret) a file "test.py" with ...
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At the time of prompting for a password (from a subordinate shell), sometimes Emacs hides the password, sometimes not. Why the inconsistency?
I use shells running under Emacs (via M-x shell) under a variety of settings1.
In all these settings, I use the same .emacs file. Nevertheless I observe an inconsistency, as described below.
In some ...
- 3,207
0
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22
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How to cleanly copy command output in shell-mode?
I can use following commands to navigate prompts in M-x shell
C-c C-p runs the command comint-previous-prompt
C-c C-n runs the command comint-next-prompt
But if I have multi-line prompt, e.g.
user@...
- 231
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26
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How to kill process similar to kill buffer
Whenever I run into infinite loops in a script and it produces a lot of output, C-c C-c (comint-interrupt-subjob) does not reach the process and cannot be killed; being over SSH hangs communication as ...
- 231
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20
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recenter-top-bottom failing to observe bottom target in comint
In emacs-version 28.2, I'm observing my comint managed processes getting into a state when C-l is just doing nothing when it would have previously moved the cursor to the bottom of the window and ...
- 185
0
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1
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40
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Enable UTF8 in Python comint processes
I'm trying to fix a Python3 script that breaks while processing a string containing Japanese characters, "出典データ".
While debugging, I get the following error when printing the string from an ...
- 4,407
2
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1
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103
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How to execute a command in elisp (startup script) whenever a new term is created?
I tried adding hook to term-mode-hook to call comint-send-string:
(add-hook
'term-mode-hook
(lambda ()
(comint-send-string (get-buffer-process (current-buffer)) "alias t='echo test'&...
- 1,083
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0
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49
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How to change the header and footer of the comint/compilation-mode?
I have a program ~/path/to/program.py. In program.py I run compile (I usually do this with the second arg COMINT=t). I get,
-*- mode: compilation; default-directory: "~/path/to/" -*-
Comint ...
- 990
3
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1
answer
266
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Comint input and output text positioning
I'm using Emacs as a TCP client for a remote Python debugger I wrote. I can connect and interact with the server, but I'm not able to get the comint buffer used as the client to align input and output ...
- 4,407
1
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1
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224
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Why jshell doesn't work in comint-mode?
When I try to run jshell using (comint-run "/usr/bin/jshell"), it presents me with the prompt but when I give it some input, the buffer gets frozen and I get no output.
Conversely when I try ...
- 13
0
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1
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62
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How to access Erlang shell JCL Mode inside an Emacs inferior-erlang shell?
Inside an Erlang shell one can access the Erlang shell User Switch Command menu (also called Erlang shell JCL Mode) by typing Ctrl-G.
When running the Erlang shell inside Emacs (as an inferior-erlang) ...
- 786
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1
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336
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Clear console output on *R* buffers when using ESS
I have this kbd in my init.el
(global-set-key (kbd "C-l") 'comint-clear-buffer)
When I use Emacs-ess mode fro programming in R, I use this kbd to clear the R output buffer, this is usually ...
- 171
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0
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82
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Send string to a fully functional REPL in Emacs on Windows?
Summary. Is there a way to get fully functional REPLs on Windows running in Emacs. I want to avoid the maintenance burden associated with comint.
Long version. In many cases I dislike how the built-...
- 1,561
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1
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110
views
How do I specify the window height of the Python interpreter?
Suppose I am editing a file in python-mode. If I start the Python interpreter using M-x run-python (or C-c C-p), the Python interpreter opens in a window (*Python*) in the bottom half of the frame. ...
- 593
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0
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116
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Finitizing infinite comint output
Context
I'm a teacher and I often want to show “bad” programs; in this case infinite outputting programs.
But while I want to show the bad I dont want my laptop crashing in class (nowadays on zoom)
...
- 329
1
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1
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307
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Create shortcut for interactive compile command
I know that we can start compile interactively using C-u M-x compile. Is there a way to start this whenever I run M-x compile? If that cannot be done, how do I create a shortcut to C-u M-x compile?
...
- 295
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0
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25
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SQL comint history saves spaces are \40
When accessing a database through an inferior process (M-x sql-msql) the history for the current session history (M-p/n) works Ok. But when restoring history entries from a previous session the string ...
- 396
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70
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M-x shell truncates commands to 4096 characters
Using M-x shell, I have encountered a problem with commandlines being truncated to 4095 characters.
Steps to reproduce:
perl -e 'print "0" x 5000 . "\n"'
Select output for next command
echo <5000 ...
- 1,253
1
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0
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101
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Abort output in currently executing command in shell mode
Sometimes in shell I end up executing a command which results in too much output.
For example, consider a wrong grep on a huge text file which results in 10,000 matches. The grep command completes ...
0
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1
answer
140
views
Is there a way to connect to a REPL without comint?
The performance of comint is not good when handling outputs of some REPL. Is there a way to connect to some REPL outside Emacs and let result display there, like in a terminal/browser/something else?
...
- 488
5
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3
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146
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Sending `C-c C-c` to the process window without swithcing to it
In ESS mode, I sometimes send some code to the process buffer and want to cancel it using C-c C-c. Can I do this without actually switching to the process window from the script window?
- 962
4
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3
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582
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How to determine which program is running inside an emacs shell buffer?
I have an emacs shell buffer which may or may not be running a certain interactive program such as ftp or python. I wish to write a lisp function which will interact with this program, but I would ...
- 839
4
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2
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880
views
Cargo-process does not accept user input
Using the Emacs mode for Cargo, I'm able to build and run Rust code inside Emacs. However, the terminal that opens when executing cargo-process-run does not accept user input.
For example, when ...
- 171
1
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0
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149
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Associate a buffer with a process
I am using Python with elpy. I am trying to use a Python shell opened on the remote computer using a shell buffer. I can cheat elpy by renaming the shell buffer with Python running in it to *Python*. ...
- 962
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1
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75
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comint: show the original input when match-cycling through history
Currently, I have bindings for comint-previous-matching-input-from-input and comint-next-matching-input-from-input.
My problem is this. Suppose I am on a prompt with some text (say, "x = ") and issue ...
- 378
0
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1
answer
317
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Deleting temporary files left over from inferior-python-mode
I am using emacs on a server so files in /tmp are not automatically cleared down. Every time inferior-python-mode runs, it leaves files in /tmp (e.g. /tmp/py15458epk).
I'm looking for a more elegant ...
- 101
4
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1
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102
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How to copy output from ess to the kill ring?
Q: how can I automatically copy output from ess to the kill ring?
Background
I use ess to conduct statistical analysis. On occasion, I need to copy its raw output into another buffer (usually ...
Dan♦
- 32.7k
0
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1
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709
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Shell mode - clear screen but keep scrollback
When using a normal terminal application (like Konsole, for example), I regularly use Control-L or the clear command to clear the terminal's contents, leaving the cursor on the top. When I do this, I ...
- 197
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1
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78
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Why isn't the flushed output from my Emacs shell buffer getting into the kill ring?
Following the advice given on p. 121 of Learning GNU Emacs, 2nd Ed.,
I'm entering the command sequence: C-c C-o, immediately after executing a command in my Emacs shell buffer.
And I'm seeing the ...
- 101
4
votes
2
answers
270
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How to get rid of flickers in python shell?
In a fresh emacs session, each time I hit enter in inferior-python-mode, the window flickers.
This does not happen in shell-mode. One can see the cursor goes to the middle of current window when ...
- 488
2
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1
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147
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How can I have comint buffer input histories betweens different comint sessions?
I'm missing the input histories like what's in IPython. But it seems that the defaults do not keep input histories after the comint buffer is killed. Also I'd like to keep them between emacs sessions.
- 488
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1
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381
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Using xonsh as python shell
I'm trying to use xonsh as my python interpreter in Emacs (the one invoked by run-python). I tried to do this by setting python-shell-interpreter to "xonsh". This works, but there are two issues:
The ...
- 13
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1
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93
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Shell buffer echoes partial long lines
I've written a command that ssh-es to a remote host and runs an interactive command there. Something like:
(defun remote-command ()
(interactive)
(pop-to-buffer (get-buffer-create "*remote-...
- 929
1
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0
answers
110
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comint-input-ring-size ignored in shell-mode
I am trying to change comint-input-ring-size in shell mode in Emacs. The comint-input-file-name is correctly set to ~/.bash_history file which is a big file (around 5000 commands). However, if I set ...
5
votes
1
answer
890
views
Shell coding system
If, before M-x shell, I run C-x RET c
(universal-coding-system-argument) I can change the coding system used by the shell.
Therefore, given
echo Straße > foo
foo will be encoded in the related ...
- 1,792
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0
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131
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shell-mode C-c C-c kill keybinding
With some regularity, I am using bash with M-x shell, and out of muscle memory I hit C-c C-c, with dramatic results:
the comint prompt streams a long error message with a large number of escaped ...
- 203
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1
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280
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Error when trying to advice python-shell-send-string
I'm trying to write advice such that each time I eval a python snippet, it automatically output the exception time in the emacs python shell
(defun python-send-with-time-record (orig-func string &...
- 488
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1
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385
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(How) can I emulate {eshell,comint}-output-filter-functions in term?
What I want to do from inside a term shell is have a function called when there is new output or a certain regexp (e.g. a prompt) appears in in a term's output. The callback function should then be ...
- 888
1
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2
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373
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Where does the Python shell from `run-python` store its input history?
As in the question title, I want to know where the inferior Python shell stores its command history (the history you cycle through through with the up arrow).
I've been searching high and low. I'm ...
- 820
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0
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55
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comint-mode problem with C++ style comments (and quotes)?
This is a rephrase of my SO question https://stackoverflow.com/questions/44147993, which didn't receive much attention in SO.
Basically, I suspect that I enountered a problem with nodejs-repl.el (...
user15945
3
votes
1
answer
1k
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How to clear shell in ielm?
I am trying the clear the inferior emacs lisp mode(ielm) buffer.
Solutions applicable to shell are not applicable here - the erase-buffer command says "Test is read only"
- 260
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2
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403
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content was split in the functions of comint-preoutput-filter-functions
Consider the following snippet
(defun python-shell-filter-long-lines (string)
(print string)
string)
(push 'python-shell-filter-long-lines comint-preoutput-filter-functions)
and M-x run-python ...
- 488
6
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0
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135
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Return System Notification When Long-running Comint Process Completes?
I often have long-running processes in comint shells (e.g. SQL or fitting statistical models, both usually via an R/ESS shell).
While they're running I navigate away and do something in another ...
- 61
2
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0
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202
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Output of ipython shell much slower than python shell
Even turning off font-lock-mode and set (setq python-shell-font-lock-enable nil), the output of an ipython shell
(setq python-shell-interpreter "ipython")
seems much slow than the python shell
(...
- 488
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0
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872
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How do I reliably get output from a process?
I have created a comint mode for using mongo. The mode works fine in the buffer, and now I am trying to use it programmatically where I need to get the output from commands.
Getting input to the ...
- 11.6k
2
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1
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869
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I need example of correct using of comint and getting last comand output
I had a problem with execution of (comint-simple-send process command). My previous example would not show the last output because I didn't use the hook and the result was being dispalyed before the ...
- 427
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4
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2k
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How can Emacs set an environment/shell variable in a subordinate shell?
I often use subordinate shells within Emacs. (I instantiate these shells with M-x shell.)
I put all these shells under auto-save-mode (through my shell-mode-hook; see below).
Is there some way that ...
- 3,207