gitignore - ignore folders that doesn't respect a specific mask

Question

I need a gitignore that ignores basically all folders with a few exceptions. I have 4 folders that needs to be sync with git 3 of them start like this :

RCU*/

And another folder named Tools. For example :

I need to ignore all folders except :

• RCUFromUR
• RCUToB360
• RCUToUR
• Tools

Every other folders than these needs to be ignored (and other folders will be added), is there a way to achieve this ?

Thanks

Answer 1

# Ignore all directories except specific ones
/*
!/RCUFromUR/
!/RCUToB360/
!/RCUToUR/
!/Tools/

# If you want to exclude subdirectories from being tracked under the above folders, you can add these
!/RCUFromUR/*/
!/RCUToB360/*/
!/RCUToUR/*/
!/Tools/*/