The gotip command compiles and runs the go command from the development tree.
To install, run:
$ go get golang.org/dl/gotip $ gotip download
And then use the gotip command as if it were your normal go command.
To update, run "gotip download" again. This will always download the main branch. To download an alternative branch, run "gotip download BRANCH". To download a specific CL, run "gotip download NUMBER".