Github ignore all but include one folder

Question

In .gitignore file I want to ignored all files and folders excluding only one folder. I try something like this but no success.

 # Ignore everything:
/**

# Except for :
!/charts/

Any suggestions? Thanks

Answer 1

To ignore everything you should use: *. Like this:

# ignore everything:
*

# except:
!charts/
!charts/*

You should keep excepting all directories under charts/*/...