more ergonomic stream redirection

[jw3126]

Usually when I want to redirect stdout, I also want to redirect stderr. And often I want to redirect them to some kind of logfile.
This is quite a bit of boilerplate:

open("stdout.log", "w") do new_stdout
     open("stderr.log", "w" do new_stderr
         redirect_stdout(new_stdout) do
             redirect_stderr(new_stderr) do
                   f()
             end
        end
    end
end

With this PR it is just

redirect_stdio(f, stdout="stdout.txt", stderr="stderr.txt")

[jw3126]

CI fail looks related to PR. However I cannot reproduce this error locally. Ideas?

[JeffBezanson]

What happens when you open the same file twice, and redirect stdout and stderr to the two descriptors?

[jw3126]

Ah, good spot. I need to make sure if stdout=stderr=/same/path that only a single io is used.

[jw3126]

I think freebsd CI fail is unrelated and this is ready to be reviewed.

[jw3126]

Can this be merged?

[StefanKarpinski]

Bump.

[jw3126]

@StefanKarpinski I am a bit surprised, that this needs triage. Anyway, I am glad that this PR gets some attention. How can I find out when the next triage session is?

[oscardssmith]

In general, any user facing change needs triage. This doesn't mean it's expected to be controversial, just that we don't want to be adding features carelessly. Triage meetings are (almost) every week at 14:30 EST on Thursdays. You're welcome to come, but don't feel like you need to.

[jw3126]

Bump! Is there interest in this? If so I can resolve the merge conflicts.

[StefanKarpinski]

Would be good to look at this on a triage call.

[jw3126]

Can this be merged? Would love to have this in 1.7.

[jw3126]

bump

[jw3126]

Bump can this please be merged before 1.7 feature freeze? This PR was ready from my side before 1.6 feature freeze and it would be frustrating to miss 1.7 as well.

[jw3126]

Merge :)?

[jw3126]

@KristofferC can you merge this?

[jw3126]

I am glad, this could be merged before the feature freeze. Thanks, everybody!