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When I am writing a shell script in sh-mode and decide to run it, I hit C-cC-x (executable-interpret). An *interpretation* buffer is displayed, showing the script's output.

Is there a robust way to automatically make this *interpretation* buffer current after it pops up, instead of having to type C-xo (other-window)?

  • @Drew Please review my edit. – John Goofy Mar 5 '18 at 16:12
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Is there a robust way to automatically make this *interpretation* buffer current after it pops up, instead of having to type C-xo (other-window)?

There are several ways of varying degree of hackiness to achieve this, but here is my preferred method.

The *interpretation* buffer is created by the command executable-interpret, bound to C-cC-x by default in sh-mode, whose docstring reads:

executable-interpret is an interactive autoloaded compiled Lisp
function in ‘executable.el’.

(executable-interpret COMMAND)

Run script with user-specified args, and collect output in a buffer.
While script runs asynchronously, you can use the C-x `
command to find the next error.  The buffer is also in ‘comint-mode’ and
‘compilation-shell-minor-mode’, so that you can answer any prompts.

The key clue here is compilation-shell-minor-mode, which suggests we can hook into settings of the compile library. One such relevant setting is compilation-finish-functions:

compilation-finish-functions is a variable defined in ‘compile.el’.
Its value is nil

  This variable may be risky if used as a file-local variable.

Documentation:
Functions to call when a compilation process finishes.
Each function is called with two arguments: the compilation buffer,
and a string describing how the process finished.

This allows us to register a custom function which selects the *interpretation* buffer when the script is done jogging:

(defun my-pop-to-interpretation-buffer (buffer _why)
  "Pop to `*interpretation*' BUFFER.
Intended as an element of `compilation-finish-functions'."
  (when (string-match-p "\\`\\*interpretation\\*\\'" (buffer-name buffer))
    (pop-to-buffer buffer)))

(add-to-list 'compilation-finish-functions #'my-pop-to-interpretation-buffer)

You can, of course, modify my-pop-to-interpretation-buffer to your heart's content.

  • This sounds good. But my first attempt was just to copy&paste the last code snippet to my ~/.emacs.d/init.el doesn't work. – John Goofy Mar 13 '18 at 16:20
  • @JohnGoofy You'll have to update your question with a more precise description than "doesn't work" in order for anyone to be able to help you. Please try to provide a reproducible set of steps starting from emacs -Q leading to the unexpected behaviour. – Basil Mar 13 '18 at 16:47
  • Okay, storing this code snippet in my init.el doesn't work. Where do I need to store this code? – John Goofy Mar 13 '18 at 17:41
  • @JohnGoofy If you want it to take effect in every Emacs session, then you need to place it in your user-init-file. You can also just evaluate it once-off for the current session. Are you sure you are evaluating the code, i.e. adding it to your user-init-file and then restarting Emacs? – Basil Mar 13 '18 at 17:46
  • Sorry, but I saved this code-snippet via copy&paste into my ~/.emacs.d/init.el, sourced it and even restart my machine but it won't work, nothing happens. – John Goofy Mar 16 '18 at 15:53

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