Example of filtering on environment variable?

[NullVoxPopuli]

Trying to make per-OS badges:

https://badges.herokuapp.com/travis/NullVoxPopuli/CryptoExchangeClient?branch=master&env=+TRAVIS_OS_NAME=osx&label=macOS

https://badges.herokuapp.com/travis/NullVoxPopuli/CryptoExchangeClient?branch=master&env=+TRAVIS_OS_NAME=linux&label=linux

my travis build: https://travis-ci.org/NullVoxPopuli/CryptoExchangeClient/builds/368190580

right now both badges show as unknown

[Quuxplusone]

There is a working example in README.md. The big difference compared to your code is that you have an extraneous + in your URL for some reason.

However, removing the + alone won't help:

The env= parameter seems to work only on non-built-in environment variables (the ones you set yourself with env: in your .travis.yml). I think I have found that os= seems to be (partly?) supported — I don't know if it's on purpose or just serendipitously — so this means that you can write

https://badges.herokuapp.com/travis/NullVoxPopuli/CryptoExchangeClient?branch=master&os=osx&label=os=osx

to get a badge that at least is doing something different from what you saw:

However, this definitely does not work for other Travis config options, such as php=: