sbt/main
Eugene Yokota 563bcb93aa Throw error if you run sbt from /
Fixes #1458

Running sbt from `/` results to sbt getting stuck trying to load the directories recursively, and eventually erroring with a java.lang.OutOfMemoryError (after freezing for a long time) even on an Alpine container.

To prevent it, this adds a check to see if the absolute path is `/` or not.

```
/ $ sbt -Dsbt.version=1.4.0-SNAPSHOT
[error] java.lang.IllegalStateException: cannot run sbt from root directory without -Dsbt.rootdir=true; see sbt/sbt#1458
[error] Use 'last' for the full log.
```
2019-09-26 17:11:29 -04:00
..
src Throw error if you run sbt from / 2019-09-26 17:11:29 -04:00
NOTICE Add, configure & enforce file headers 2017-10-05 09:03:40 +01:00