Re: Silently edit a buffer

Dmitry Zotikov wrote:

> Dear all,
>  
> what would be the best way to silently edit a buffer? In particular, I want to
> be able to write the content of a variable to it, as well as to delete all of
> its content.
>  
> The story goes, I'm writing a plugin that among other things reads from a
> network socket using Vim 8 channels and jobs; this is the corresponding call:
>  
> call job_start(command_cmd, {'out_io': 'buffer', 'out_name': '_out'})
>  
> The problem is that on the other side of the socket there's a server process
> reading from the channel set to NL mode would always leave one line of
> input in the socket, and so I'm forced to either fall back to RAW
> mode, or to check whether there's something left in the socket and
> read it later with a separate ch_read call:

I created a file "temp" that is missing the final EOL.
If I then do:
call job_start("cat temp", {'out_io': 'buffer', 'out_name': '_out'})
Then I see the last line of "temp" in _out.
Thus it appears to work.
Perhaps the server process doesn't flush the output?

> - Writing in RAW mode directly to the buffer leaves ^@ in place of proper
> linefeeds, meaning a callback function would have to be called, that would
> substitute ^@ with ^M and only then write to the buffer; this is where the
> initial question stems from.
> - ch_read() call would also have to be performed by a callback function that
> will, again, need a way to somehow write to the buffer.
>  
> The closest solution I've got is to do something like
>  
> :bufnr('_out') bufdo put =msg
>  
> but that switches the current window to "_out" buffer.

--
There are two ways of constructing a software design. One way is to make
it so simple that there are obviously no deficiencies. The other way
is to make it so complicated that there are no obvious deficiencies.
-C.A.R. Hoare

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