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In my $VIMRC, I would like to

autocmd BufWinEnter *.ly call s:BufWinEnterLY()
autocmd TextChanged *.ly call s:TextChangedLY()
autocmd BufUnload *.ly call s:BufUnloadLY()

I want s:BufWinEnterLY() to create a buffer below with the intent to act as a log that cannot be modified, which I will explain further down.

I want s:TextChangedLog() to execute asynchronously lilypond "some predefined arguments" and have all stderr output from that be appended to the aforementioned log.

I want s:BufUnloadLY() to simply delete the log buffer.

I have tried using jobstart with rpc = true, termopen then rpcnotify, serverstart + sockconnect then rpcnotify, but none of these methods work. Any help?

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    that looks more like 3 separate questions. It should be possible to have a buffer receive the stderr of some jobs, please show what your current function looks like.
    – Christian Brabandt
    Sep 7, 2021 at 7:30
  • I agree with @ChristianBrabandt .For example to answer the question on the title I would say execute the command with a . in front (e.g. try opening vim and type :.!date) but that doesn't relate at all with your actual question
    – Spyros Mourelatos
    Sep 7, 2021 at 7:51
  • I don’t think you need rpc here—just to direct the output streams to the buffer. If there isn’t already an option to do this, you could write a callback, or just use :terminal ++shell lilypond args >/dev/null (I’m assuming you only care about stdout)
    – D. Ben Knoble ♦
    Sep 7, 2021 at 12:47

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