Add polling mode to support watching shared folders (for Vagrant, Docker, etc.)

[Deimos]

Hi @sveetch,

I'm using Boussole inside a Vagrant VM, where my SCSS files are being edited on the host, but are available to the guest through a shared folder. The watch mode doesn't work in this kind of setup, since inotify events don't occur in a shared folder, so watchdog doesn't notice any changes. It looks like some other projects have addressed this by adding an option to use a watchdog PollingObserver instead. If Boussole could add a similar option, that would be very useful for similar development setups.

Here's a couple of links to related issues/PRs for more information:

• Docker/Vagrant/Virtualbox shared folders compatability gorakhargosh/watchdog#283
• Add polling options for remote file systems joeyespo/pytest-watch#10

[sveetch]

So basically, solution would be to add something like a --poll option to use the PollingObserver instead of the default one ?

This should be easy, but sadly i can't test this for now since i dont have any Vagrant/Docker environment, if you are available to do so i can do it in a dedicated branch so you test it then report if it do the trick, ok ?

[Deimos]

So basically, solution would be to add something like a --poll option to use the PollingObserver instead of the default one ?

Yes, exactly. I think either a --poll option or a new config-file setting would work well.

if you are available to do so i can do it in a dedicated branch so you test it then report if it do the trick, ok ?

Sure, I'd be happy to test it.

[sveetch]

It's ok, the "poll" option is available with the 1.2.0 version (commit 381b02c).

[Deimos]

Tested and it works perfectly, thanks very much for implementing that so quickly.