golang: calculates cyclomatic complexities of functions in Go source code.

Just found an kind of old interesting project: https://github.com/fzipp/gocyclo

$ go get github.com/fzipp/gocyclo

$ cd ~/go/src/github.com/fzipp/gocyclo

$ go build gocyclo.go

$ cp gocyclo ~/go/bin

$ export PATH=$PATH:~/go/bin

$ gocyclo file.go