appveyor.yml - correct case in paths, use trunk

[MSP-Greg]

This can cause very odd issues, seemingly coming out of nowhere. I had the mistake in some repos also...

2nd commit uses trunk.

[MSP-Greg]

Test times should be much faster, as Appveyor does not set a default clone depth, so the git clone was grabbing everything. I set it to match Travis, which is 50.

Appveyor docs state that all versions of Ruby exist in all VS images, but there may be an issue with the default (2015?). The 2017 image does have 2.6. I'll raise an issue with Appveyor about 2.6.

[aycabta]

Please don't use 2.6 on AppVeyor yet.

[MSP-Greg]

Done. Forgive me, might I inquire why?

[aycabta]

Unfortunately, AppVeyor doesn't support 2.6 yet...

[MSP-Greg]

@aycabta

Appveyor does support 2.6. It is an Appveyor issue, but the problem is only with older (?) VS images. The image can be set in the UI, or in the yaml. I added a newer image to the yaml, and it works fine (2.6.1)

See
https://ci.appveyor.com/project/ruby/rdoc/builds/24219700/job/fc8725pb2fc6hv2m
and
https://ci.appveyor.com/project/ruby/rdoc/builds/24219700/job/u95t56kk7aksf5y1#L98

They will be updating 2.4, 2.5, & 2.6 sometime in the near future.

JFYI, you may (from time to time) find CI Ruby version summaries I run on CRON sessions helpful:

https://ci.appveyor.com/project/MSP-Greg/appveyor-ruby

https://travis-ci.org/MSP-Greg/travis-ruby