just out of my mind and before breakfast :) did you see Stdio ? S
On 18 Apr 2024, at 01:31, Tim Mackinnon <tim@testit.works> wrote:
Hi - I've been messing around with deploying a hobby pharo app to the web.. which has become a lot simpler over the years, although the tech keeps changing and you have to relearn things.
Anyway, I have my image in one of the wonderful BA Docker containers, and it runs well - and the host I'm using will show the logs for you, so you can figure out what is going on... well that is if your logs come out properly (and of course, if it gets really hairy then you can get a VNC session onto the image and figure stuff out)
So logs are handy, and pharo these days has a nice headless mode that redirects the Transcript to stdout - and there are also a few decent logging frameworks as well.
But as most things go to the Transcript, and that goes to stdout - it should be good.
HOWEVER - flushing is the killer, as if things happen and the last thing goes wrong, but the output isn't flushed, then you aren't going to see it.
So my question is how to properly flush? And I'm sure I've read something about this before, but I can't find it.
From memory, you often need to have a Transcript cr. to flush your last line.
BUT, most things in the image seem to use "self crTrace:" these days, which is a cr to ensure the previous msg is separated from what you want to write, and then you write your line out. However, as there is now cr - you might not see it.
So I tried changing my stuff to use "self traceCr:" (which is in the image), and that still didn't seem to work - the last failing line wasn't being output. Worse still, its confusing, as many things in the image are using crTrace: and so you get intermingled messages, which are hard to decipher.
So I tried: Transcript cr; show: msg; flush
But that didn't seem to work (which I don't understand)
Eventually I did: Transcript show: msg; cr; flush
And this seems to ensure things do reliably get outputted - but I'm wondering if anyone can shed light on this areas?
Ideally I want to use: Transcript cr'; show: msg; flush
As this plays much better with everything that is in the image - but is there some way to do this? And indeed, will log tools the Bettersatack or papertail play ball with output like this (as I guess they operate on complete lines to interpret log levels etc),
Anyway - I'm curious if anyone else has done work in this area to shed light?
Thanks,
Tim
As an aside - for deployment - several years ago I came across dockerize.io <http://dockerize.io/> - which lets you upload a Docker image to a host, and it will run it for you. Sadly that service didn't survive... but there are quite a few like it now, and so I'm trying Render.com <http://render.com/> - which is similar, but the twist is you need to store a Docker image in a registry somewhere (I use gitlab from my CI pipeline), and then it will retrieve it and run it for you (for either free in 40 minute chunks, or for $7/m - which is pretty good, and possibly bit simpler than Digital Ocean). Its pretty cool, and maybe I will write up about it sometime
Stéphane Ducasse http://stephane.ducasse.free.fr 06 30 93 66 73 "If you knew today was your last day on earth, what would you do differently? ....ESPECIALLY if, by doing something different, today might not be your last day on earth.â Calvin & Hobbes