By following this tutorial I created a go lang project and opened it by Visual Studio Code.
The code itself works fine I can run the server, but somehow VS Code shows
cannot find package "appengine" in any of:
/usr/local/Cellar/go/1.8.3/libexec/src/appengine (from $GOROOT)
/Users/ironsand/go/src/appengine (from $GOPATH)
I thought I must set GOROOT for the Google App Engine, but according to this stackoverflow question I shouldn't.
How to make VS Code recognize google app engine library properly?
More info
The appengine package exists in ~/dev/google-cloud-sdk/platform/google_appengine/goroot-1.8/src/appengine
I'm using macOS Sierra 10.12.6.