Re: Enabling a vimrc setting from the current buffer

On Wednesday, February 1, 2017 at 9:20:18 AM UTC-6, Neil Watson wrote:
> Greetings,
>
> High level goal: Optionally have vim run the current buffer right after writing
> it to disk.
>
> A setting like this does make the post write run work, but on all buffers.
>
> au BufWritePost * !./%
>
> How can I make this work on just the current buffer and how can a quickly
> toggle it on or off with less typing? I did try making a function, but calling
> it did nothing:
>
> if exists("b:Autorun")
> au BufWritePost * !./%
> endif

For your attempted method you would just need to move the check to *within* the autocmd:

au BufWritePost * if exists("b:Autorun") | !./% | endif

A better method would probably be to use a buffer-local autocmd (:help autocmd-buffer-local):

au BufWritePost <buffer> !./%

and then get rid of it:

au! BufWritePost <buffer>

Map these to a keypress or a user-defined command and you're ready to go.

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