[web-devel] yesod devel strangeness

Michael Snoyman michael at snoyman.com
Mon Apr 25 19:53:07 CEST 2011

I *did* try using the plugins package in the past, but ran into two problems:

1) Couldn't get it installed on Windows, which (for better or worse)
is a supported platform for Yesod development.
2) The whole thing crashed when trying to load the app.

Point 2 might be solved by our switch to Dynamic, and maybe the
Windows issue can also be fixed somehow. But my experience so far
would definitely categorize direct-plugins as the simpler of the two.


On Mon, Apr 25, 2011 at 12:13 AM, Matias Eyzaguirre <dented42 at gmail.com> wrote:
> I'm curious as to why direct-plugins was used instead of hs-plugins like yi uses. I have not actually had any experience with either, but from what I can tell it seems like hs-plugins is a bit simpler to work with, and it doesn't seem to require that packages be installed. perhaps that would be an easier route?
> But again, as I said I have never actually used either of the two packages, so my opinion is based entirely on hearsay and not on actual hands on experience.
> On Apr 23, 2011, at 11:39 PM, Michael Snoyman wrote:
>> Wow, this does seem to be a problem. It appears that loadDynamic never
>> loads a new version of the app. I can think of two approaches for
>> fixing this:
>> * Start the web server as a separate process, and kill/restart that
>> process each time a compile is successful (easier route).
>> * Ditch direct-plugins and write some code that loads the application
>> directly from the dist folder, hopefully avoiding this caching in the
>> process.
>> The first approach is probably easier to hack together, but the second
>> is better as a long-term strategy, since we want to avoid the need to
>> install apps anyway. I have no experience with dynamic code loading
>> besides the direct-plugins and plugins packages, so if anyone has
>> recommendations, I'm happy to hear them.
>> Michael

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