A modern programming language that makes developers happier.

kotlinlang

<@U4H0M349G>
I’m in a pickle here, there is some time hack I did to make something work, but I don’t want to keep it like that.
I will describe the situation:
```
environment = jvmFlags overrides
                systemEnv overrides
                filesystem overrides
                defaultConfig
```
Now most of the custom config (or all) for example is found under *file system* environment.

In this case environment will check JVM-&gt;System-&gt; File (Finds them, life is amazing).
However this works only when my lenses are *optional*.
*Example:*
```
private val servicePortLens = <http://EnvironmentKey.int|EnvironmentKey.int>().*optional* ("SERVICE_PORT")
val servicePort = environment[servicePortLens]
```

*However if I write it like this:*
```
<http://EnvironmentKey.int|EnvironmentKey.int>().*required* ("SERVICE_PORT")
val servicePort = environment[servicePortLens]
```
The lens will try to check if it’s found under first environment (JVM) and throw when it doesn’t find it.
```
Exception in thread "x" java.lang.ExceptionInInitializerError
Caused by: org.http4k.lens.LensFailure: env 'SERVICE_PORT' is required
```

I would expect it to collect what it can from each environment until all fallbacks are exhausted no?