How to check if a program is run in Bash on Ubuntu on Windows and not just plain Ubuntu?

Question

Pretty straightforward, the usual places to figure out the OS you\'re on seem to be identical to plain Ubuntu on Ubuntu for Windows. For example uname -a is ide

Answer 1

I just came up with this for my .bashrc for adding some WSL items to $PATH.

Works in 1703. Not sure if earlier versions.

if [[ $(uname -r) =~ Microsoft$ ]]; then
    foo
fi