hot reloading code and html templates for web app development

[Matthew Eric Bassett]

Hi all,

I often use serve/servlet to launch my webapp. Often from the repl
while I'm developing.

One major annoyance I have, however, is that I cannot easily hot-swap
code. If I change a required dependency I then need to kill the process
(usually re-enter! from the repl to update the changed dependency) and
serve/servlet again. It's an annoying process, but as enter! only
updates changed files it only takes a few seconds.

Things get worse when I change templates. These don't reload until I've
exited out of the repl and come in again - enter! doesn't seem to notice
that templates have changed. This is an intolerable annoyance!

I must be doing something silly, as this is a very inefficient process.
Is there a way to get racket to hotswap templates and updated
dependencies without having to explicitly restart the serve/servlet
thread, or worse the entire racket machine ?

Thanks,

--
Matthew Eric Bassett | http://mebassett.info

[Sam Tobin-Hochstadt]

Matthew,

There's a nice package for helping with this here:
https://github.com/tonyg/racket-reloadable/

It's maybe not quite as automatic as having the templates be
dynamically loaded, so probably we should add a way to do that too.

Sam

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[Jay McCarthy]

Hi Matthew,

The Web server doesn't do any special to prevent or make possible what
you're talking about. Other orthogonal Racket features will help you
though. The key is dynamic-rerequire. A great library for doing stuff
like this the reloadable package:

https://github.com/tonyg/racket-reloadable

Jay

On Wed, Jan 6, 2016 at 2:32 PM, Matthew Eric Bassett <meba...@gegn.net> wrote:

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--
Jay McCarthy
Associate Professor
PLT @ CS @ UMass Lowell
http://jeapostrophe.github.io

"Wherefore, be not weary in well-doing,
for ye are laying the foundation of a great work.
And out of small things proceedeth that which is great."
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