Environment option doesn't seem to work in Windows

[dracan]

Docker Compose seems to fail getting environment variables in Windows. I'm testing on Windows 10 (not tried on any other versions of Windows). Here's a simple YML file:

test:
  image: centos:centos6
  environment:
    MY_ENVIRONMENT_VARIABLE:

Regardless of whether MY_ENVIRONMENT_VARIABLE has been set, I get the following error:

Validation failed, reason(s):
Service 'test' configuration key 'environment' 'MY_ENVIRONMENT_VARIABLE' contains None, which is an invalid type, it should be a stringnumber or a boolean

This is with Docker Compose 1.5.0rc1.

[GraemeF]

Specifically, this feature (from the docs) isn't working on Windows:

Environment variables with only a key are resolved to their values on the machine Compose is running on

[dnephin]

This was actually a bug for everyone (not just windows), and was fixed in #2225.
You can try it out with a build of master: https://dl.bintray.com/docker-compose/master/

The fix will be in rc2 (and the final release). If it's not working with master, please do re-open this issue.