[FEATURE]: two helper methods, IsLocked() and IsDB()

[willie68]

Have you tried Badger before this proposal? and did not find anything similar?

Yes

What you wanted to do.

I like to check two things,
first: check if a folder is a database folder
second: if it’s already open by another process/instance/machine

What you actually did.

I wrote two simple util methods for it, but because Windows and Unix (Linux) are quite different in handling this, it would be much more far-sighted to have an interface/API on the badger side for this.

Why wasn't it great, with examples.

In my code i have to know the implementation details of badgerDB's file layout and even have to rewrite parts of the already present but private code (reading MANIFEST file, folder locking mechanism) And it feels like a word around for the problem.

Additional information.

see: https://discuss.dgraph.io/t/how-to-check-if-a-folder-is-a-database-folder-and-if-its-already-open/19364