Santiago Alejandro Agüero wrote:
> While I was trying to write some vim code for testing a (async)
> functionality for Neomake plugin, I've noticed the following scenario:
>
>
> - Having the following shell script (with errors):
>
> #!/bin/sh
>
> a='$var'
>
> foo(
>
>
> - And the next vim test code:
>
> function! StartJob()
> let g:job = job_start(['/bin/sh', 'errors.sh'], {
> \ 'callback': 'HandlerCallback',
> \ 'close_cb': 'HandlerClose',
> \ 'exit_cb': 'HandlerExit'
> \ })
> endfunction
>
> function! HandlerCallback(channel, line) abort
> call Debug('[Callback] channel: ' . a:channel . ', line: ' . a:line . ',
> channelStatus: ' . ch_status(a:channel))
> endfunction
>
> function! HandlerClose(channel) abort
> call Debug('[Close] channel: ' . a:channel . ', channelStatus: ' .
> ch_status(a:channel))
> endfunction
>
> function! HandlerExit(job, status) abort
> call Debug('[Exit] job: ' . a:job . ', status: ' . a:status . ',
> jobStatus: ' . job_status(a:job))
> endfunction
>
> function! Debug(msg) abort
> call writefile([a:msg], 'output.log', 'a')
> endfunction
>
> command! -bar RunJob call StartJob()
>
>
> - Then the following thing happens:
>
> - RunJob # Works OK, both HandlerCallback (with data) and HandlerClose are
> called
What data is received? The shell script doesn't write anything.
> - RunJob | sleep 50m # Does not work, only HandlerClose and HandlerExit are
> being called (no buffered data)
>
>
> The reason I need the sleep is that I want to check every 50m for the
> job_status in order to continue with some test assertions.
>
> Also, I've noticed that this does not happen with other commands... Is there
> something special about /bin/sh?
This might be related to a problem that was reported but I could not
reproduce: When the job exits quickly, Vim doesn't read the output,
because the channel handle gets an error before reading.
You should be able to get more information with ch_logfile().
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