fix(dotnet): set paths for global tools

[dmccaffery]

No description provided.

[dmccaffery]

@sjk07 @tim528 @tiffanywang3 : can I get a review?

[sjk07]

@dmccaffery just for my own sanity what caused this change?

We are checking if dotnet is in use/local/share/... Then set it. If it's in $home/.dotnet then export the dotnet root env var.

We also always default to the home directory dotnet install if it exists.

PS: Push your storage branch 😘

[tim528]

Reviewed good sir, and I give you my stamp of approval

[dmccaffery]

@sjk07 : DOTNET_ROOT is used for the new(ish) global tools dependency evaluation, for instance:

dotnet tool install -g dotnetsay

We did not include this on the PATH previously, so global tools would fail. The reason to check for /usr/local/share/dotnet is in case someone installs the dotnet runtime as a shared runtime (apt-get, etc). We also evaluate $HOME/.dotnet as this is where our own installation places the runtime.