To use this, you'd need to have a Google Sheet set up with statistical NBA data, a registered application in the Google developers console from which you'd need to download an OAuth 2.0 Client ID as sheets-auth/credentials.json, and to copy conf/config.example.json to conf/config.json and adjust any settings as needed.
The binary can be built with go build and executed as a CLI. The mode flag can be used to either fetch Google Sheets data or calculate fantasy NBA rankings.
go build
./fantasy-nba-rankings-calculator -mode="fetch"
./fantasy-nba-rankings-calculate -mode="calculate"
Descend into the directory containing the test files you wish to run and go test.