Hi Dan,

How would that experience be different if trace went to stderr? Wouldn’t the stream of HTTP messages display inline with the cli output in the same way?

Regards,
Dies Koper
Cloud Foundry Product Manager - CLI


From: Daniel Mikusa [mailto:dmikusa(a)pivotal.io]
Sent: Wednesday, October 26, 2016 11:06 PM
To: Discussions about Cloud Foundry projects and the system overall.
Subject: [cf-dev] Re: Re: Re: changing cf CLI trace stream from stdout to stderr

Just my $0.02, but I like the current behavior. I find it helpful for troubleshooting purposes to be able to get the stream of HTTP messages inline with the output from the cli. It helps to very quickly and easily establish a timeline and isolate a particular HTTP request / response as being a problem, like when a response is slow. Just run `CF_TRACE=true cf ...` and watch to see where it pauses.

I like the suggestion in the GH issue.

Perhaps adding the option of specifying CF_TRACE=stderr (and stdout for consistency, which would be equal to using 1) could be a way to do it.

IMHO, if you did this then the default option would matter a lot less. I'd still prefer to keep the default behavior to STDOUT, but that's mostly me just being selfish. As long as I have a way to invoke that stdout behavior when I need it, I could live with the default changing.

Dan


On Tue, Oct 25, 2016 at 8:10 PM, Koper, Dies <diesk(a)fast.au.fujitsu.com<mailto:diesk(a)fast.au.fujitsu.com>> wrote:
Hi Hector,

I have not been able to find a way to make that work on Windows.
CF_TRACE=/dev/stderr just creates a “dev” directory in the root of the drive you run cf from with a file called “stderr”.

Regards,
Dies Koper
Cloud Foundry Product Manager - CLI


From: Hector Rivas Gandara [mailto:hector.rivas.gandara(a)digital.cabinet-office.gov.uk<mailto:hector.rivas.gandara(a)digital.cabinet-office.gov.uk>]
Sent: Tuesday, October 25, 2016 10:27 PM
To: Discussions about Cloud Foundry projects and the system overall.
Subject: [cf-dev] Re: changing cf CLI trace stream from stdout to stderr

Hello,
Have you tried sending CF_TRACE to /dev/stderr? Like this

CF_TRACE=/dev/stderr cf apps | less
I think it is system specific, but it should work on most of them.

On 25 October 2016 at 04:44, Koper, Dies <diesk(a)fast.au.fujitsu.com<mailto:diesk(a)fast.au.fujitsu.com>> wrote:
Hi friends,

Currently, the cf CLI trace when enabled (“CF_TRACE=true”, `cf config –trace true` or with the `-v` option) is directed to stdout.
Looking at other commands, e.g. `curl -v`, it’s common to send such information to stderr.
This recently came up in the following issue.
https://github.com/cloudfoundry/cli/issues/962

I’d like to know whether anyone would be massively inconvenienced if we fixed this to make cf CLI trace output go to stderr (e.g. because you have many scripts expecting trace to be streamed to stdout, or not expecting anything but errors and warnings to be streamed to stderr)?
Note that trace configured to output to a file would not be affected.

Cheers,
Dies Koper
Cloud Foundry Product Manager - CLI





--
Regards
Hector Rivas | GDS / Multi-Cloud PaaS