CI AppVeyor

[mhujer]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Fixed tickets	none
License	MIT
Doc PR	none

This PR adds a config file for AppVeyor which is a CI similar to travis, except they run the builds on Windows machines. Therefore any possible incompatibilites can be easily discovered (ref #2604)

~~**It is still very WIP, I just want to:

1. prevent possibly duplicate work, if someone starts working on the same thing
2. get feedback as early as possible**~~

You can see the build output here https://ci.appveyor.com/project/mhujer/sylius

To integrate it with this project, it is necessary to login to https://ci.appveyor.com/ using github account and enable the build for this repo.

(Symfony has recently started to use AppVeyor - symfony/symfony#15575, that's where most of the config comes from)

[mhujer]

Exif extension is not required by Sylius or any dependency, but if it is missing, it causes error during cache:warmup

php app\console cache:warmup --env=test

Warming up the cache for the test environment with debug true

  [Imagine\Exception\NotSupportedException]                     
  PHP exif extension is required to use the ExifMetadataReader  

[pjedrzejewski]

This is awesome, thank you for your work Martin! 👍 I hope this is the first step in much better Windows support.

[adamelso]

aww beat me to it adamelso#6

but nice! 👍 I'll let you continue

[pjedrzejewski]

@adamelso I like to have such problems in the community! :) Let's combine your work and get the best possible configuration. Would be great if you guys discuss your approaches.

[mhujer]

I needed to split the existing suites into two parts to fit into AppVeyor build time limit

[pjedrzejewski]

Great work @mhujer! What configuration should I setup in AppVeyor? I have registered and added Sylius project. I merge this to see if it works, but I guess I will need to do a bit more setup. I really appreciate the effort you have put into this, it will make our life so much easier and hopefully we see less bug reports in Windows. :) 👍

[mhujer]

@pjedrzejewski There shouldn't be any setup necesarry in the AppVeyor - you can either set it through the web UI or through the config file.

[mhujer]

The only downside of the AppVeyor is that the build is quite slow 🐌