GH-3791 don't swallow output from shell tasks

[JanKoehnlein]

Signed-off-by: Jan Koehnlein [email protected]

[simark]

I am working on tasks and process stuff, so I'd like to have a bit of time to look at this, if possible. We had also noticed issues about short-lived tasks (see #2961).

[simark]

Apart from the discussions we have on #3791, I tried this locally. I noticed that the shell stays open after the "task" (the process we want to run) has ended, which means the task never properly ends.

[simark]

If we want to run things through a shell (and we'll want to, that's the point of shell tasks), I think we'll want to run them using bash -c '... or equivalent. I dug in node's child_process.spawn code a while ago, I think that's how it does.

[paul-marechal]

Also seems to be breaking some tests.

[vince-fugnitto]

I believe the pull-request can be closed, at the moment it is quite outdated (2018) and is inactive.
I propose we open a new pull-request if we ever want to revisit such a feature.