Initial Query

In emacs lisp how do I silence "Process python-process finished"

LLM Generation

Query

In emacs lisp how do I silence "Process python-process finished"

Output

In Emacs Lisp, when you run a process asynchronously, Emacs will notify you when the process finishes by displaying a message in the echo area (minibuffer) like "Process python-process finished". If you want to silence this message and prevent it from appearing, you can customize the process sentinel (a function called when the process changes state) for your specific process so that it doesn't display the message. Here's how you can do it: 1. Define a custom sentinel function that does what you need (if anything) when the process ends, but does not display the usual "Process finished" message. You can simply ignore the arguments or use them to perform some task, without calling `message` or similar functions that would display output in the echo area. 2. Attach your custom sentinel to the process when you start it. Here's an example where we start a Python process and set a custom sentinel that does nothing:

(defun my-silent-python-process-sentinel (process event)
  "Custom sentinel for python process that silences the 'Process finished' message.
PROCESS is the process the sentinel is watching.
EVENT is the process event."
  ;; Here you can add code to handle process ending if needed,
  ;; but we do nothing to keep it silent.
  )

(let ((process (start-process "python-process" "*Python Output*" "python" "-c" "print('Hello, World!')")))
  (set-process-sentinel process #'my-silent-python-process-sentinel))

This script starts a Python process that simply prints "Hello, World!", but thanks to our custom sentinel, Emacs will not display the usual process termination message in the echo area. Note that the custom sentinel function `my-silent-python-process-sentinel` is purposely minimal here. Depending on your needs, you might want to add error handling, logging to a buffer, or other actions in response to different `event` strings that indicate how the process ended (e.g., "finished\n", "exited abnormally with code ...", etc.). Just make sure not to call `message` or other functions that would write to the echo area if you want to keep it silent.

Substring Evaluation

Testing if the previous output contains the string set-process-sentinel: True

Initial Query

In emacs lisp how do I silence "Process python-process finished"

LLM Generation

Query

In emacs lisp how do I silence "Process python-process finished"

Output

In Emacs, the message "Process python-process finished" is a notification that a subprocess, in this case, a Python process, has completed its execution. This message is often useful for tracking the lifecycle of subprocesses but can sometimes be noisy or unnecessary, especially if you're running many subprocesses or if the process's completion is expected and doesn't require explicit acknowledgment. To silence this message in Emacs Lisp, you can temporarily bind `message` to a function that does nothing (or filters out messages you don't want to see) around the call that starts the process. This approach requires careful consideration because it suppresses all messages, not just the one indicating that the process has finished. Here's a general way to do it:

;; Define a wrapper around `message` that filters out unwanted messages.
(defun my/silence-message (func &rest args)
  (unless (string-match-p "^Process .* finished$" (apply #'format args))
    (apply func args)))

;; Use `cl-letf` to temporarily override `message` with your custom function.
(defun my/run-python-process-silently ()
  (interactive)
  (let ((process-connection-type nil))  ; Use a pipe for communication
    (cl-letf (((symbol-function 'message) #'my/silence-message))
      ;; Your code to start the process goes here, e.g.:
      ;; (start-process "python-process" "*Python Process*" "python" "-c" "print('Hello, world!')")
      )))

Replace the commented-out `start-process` call with your actual code to start the Python process. This approach uses `cl-letf` from the `cl-lib` package to temporarily override the `message` function with `my/silence-message`, which checks if the message matches the pattern of a process finishing. If it doesn't match, it forwards the message to the original `message` function; otherwise, it does nothing, effectively silencing the specific message about the process finishing. **Important Considerations:** - This method suppresses all messages matching the specified pattern during the execution of the code within `cl-letf`, not just those from the process you're interested in. Use it judiciously to avoid missing important messages. - The pattern `^Process .* finished$` is designed to match the specific message you mentioned. If the actual message includes more details (like exit status or process name), you might need to adjust the pattern. - Overriding built-in functions like `message` can lead to unexpected behaviors or conflicts, especially in complex Emacs configurations or when interacting with other packages that rely on messaging. Always test thoroughly in your specific environment.

Substring Evaluation

Testing if the previous output contains the string set-process-sentinel: False

Initial Query

In emacs lisp how do I silence "Process python-process finished"

LLM Generation

Query

In emacs lisp how do I silence "Process python-process finished"

Output

In Emacs, when working with processes, messages like "Process process-name finished" are common. These messages are generated by Emacs to notify the user when a process has terminated. However, in some cases, you may want to suppress these messages, for example, to keep your minibuffer or *Messages* buffer clean during automation tasks or when running background processes. To silence the "Process python-process finished" message in Emacs Lisp, you can temporarily override the `message` function around the code that starts and stops the process, or directly manipulate the process sentinel that generates this message. Here's a more refined approach by setting a custom process sentinel for your python process. The process sentinel is a function that gets called when the process state changes, including when it finishes. By default, it's this sentinel that emits the "Process ... finished" message. You can set your own sentinel that does not emit this message:

(defun my-python-process-sentinel (process event)
  "Custom sentinel for python process. Ignores the process finished message."
  (unless (string-match-p "finished\\|exited" event)
    ;; Only show messages for events other than finished or exited, if desired
    (message "Process %s had an event: %s" process event)))

(let ((process (start-process "python-process" "*Python Output*" "python" "my_script.py")))
  (set-process-sentinel process #'my-python-process-sentinel))

In this code, `my-python-process-sentinel` is a custom function that acts as the process sentinel. It receives two arguments: the process and the event description. By checking the event description, you can filter out the "finished" or "exited" messages. If you want to handle other events (like if the process is stopped or has an error), you can insert your logic in the `unless` block. Remember to replace `"python"` and `"my_script.py"` with the actual command and script you want to run. This approach gives you control over the process lifecycle events and keeps your minibuffer and *Messages* buffer free from the "Process python-process finished" message, without globally affecting the behavior of other processes or the `message` function.

Substring Evaluation

Testing if the previous output contains the string set-process-sentinel: True

Initial Query

In emacs lisp how do I silence "Process python-process finished"

LLM Generation

Query

In emacs lisp how do I silence "Process python-process finished"

Output

In Emacs, when working with processes, messages like "Process <process-name> finished" are automatically generated to keep the user informed about the status of background processes. However, in certain cases, you might want to suppress these messages to keep your message buffer clean or to avoid distractions. This can be particularly useful when you're running processes frequently, such as in a tight loop or as part of an interactive development workflow. Suppressing such messages in Emacs Lisp requires a bit of a workaround since the message is generated by the underlying process management system. Here's a general strategy you can adopt to temporarily suppress these messages: 1. **Advise the `message` function**: Emacs Lisp allows you to advise functions, effectively allowing you to run your own code before, after, or around the original function. By advising the `message` function, you can intercept attempts to display messages and suppress specific ones. 2. **Use a flag to control suppression**: You can use a variable as a flag to determine whether messages should be suppressed. This allows you to turn suppression on and off as needed. Here's an example of how you might implement this:

(defvar my/suppress-process-finished-message nil
  "When non-nil, suppress 'Process ... finished' messages.")

(defadvice message (around my/suppress-process-finished-message-advice activate)
  (unless (and my/suppress-process-finished-message
               (string-match-p "^Process .* finished$" (apply #'format format-string args)))
    ad-do-it))

(defun my/suppress-process-finished-messages (orig-fun &rest args)
  (let ((my/suppress-process-finished-message t))
    (apply orig-fun args)))

(advice-add 'your-function-that-calls-process :around #'my/suppress-process-finished-messages)

In this example: - We define a variable `my/suppress-process-finished-message` to control whether messages starting with "Process ... finished" should be suppressed. - We advise the `message` function with `my/suppress-process-finished-message-advice`. This advice checks if `my/suppress-process-finished-message` is non-nil and if the message to be displayed matches the pattern for process completion messages. If both conditions are met, the message is suppressed; otherwise, the original `message` function is called (`ad-do-it`). - We define a wrapper function `my/suppress-process-finished-messages` that sets `my/suppress-process-finished-message` to `t` (true) and then calls the original function. This effectively turns on message suppression for the duration of the call. - Finally, we use `advice-add` to apply `my/suppress-process-finished-messages` as around-advice to `your-function-that-calls-process`. Replace `your-function-that-calls-process` with the actual function name that initiates the process. This approach allows you to selectively suppress "Process ... finished" messages for specific functions or code blocks. Remember to replace `your-function-that-calls-process` with the function or command you're using that leads to the creation of processes whose completion messages you want to suppress.

Substring Evaluation

Testing if the previous output contains the string set-process-sentinel: False

Initial Query

In emacs lisp how do I silence "Process python-process finished"

LLM Generation

Query

In emacs lisp how do I silence "Process python-process finished"

Output

To silence the message "Process python-process finished" or similar process completion messages in Emacs Lisp, you can temporarily bind the `message` function to a function that does nothing (or to `ignore`) around the code that starts and finishes the process. This way, when the process finishes and Emacs tries to notify you by calling `message`, it will call your do-nothing function instead. Here's a basic example of how to do this:

(defun my-silence-process-completion (function &rest args)
  "Run FUNCTION with ARGS, silencing the 'Process ... finished' message."
  (cl-letf (((symbol-function 'message)
             (lambda (&rest args) nil))) ; Override `message' to do nothing.
    (apply function args)))

;; Example usage with a shell command that runs a python script
(my-silence-process-completion
 'shell-command
 "python -c 'print(\"Hello, World!\")'")

In this example, `my-silence-process-completion` is a higher-order function that takes another function `function` and its arguments `args`, and runs that function with its arguments while silencing the process completion message. It does this by temporarily overriding the `message` function with a lambda that does nothing, using `cl-letf` for dynamic binding. To apply this to your specific case, you would replace `'shell-command` and the subsequent command string with the function call that starts your Python process. Keep in mind that this example uses `shell-command` for illustration; you might need to adjust it depending on how you're starting the Python process (e.g., `start-process`, `call-process`, etc.). Remember, this approach silences *all* messages produced by `message` in the affected code, not just the process completion message. If you need other messages to be visible, you might need a more sophisticated approach, such as wrapping only the specific call that leads to the process completion message or temporarily replacing `message` with a function that filters out only the messages you want to suppress.

Substring Evaluation

Testing if the previous output contains the string set-process-sentinel: False