如何在go源代码目录中列出导入的模块

Is there an tool or easiest way to list all imported packages on go source code directory? for example:

$ go list_imports a_directory/
github.com/bla/bla
github.com/foo/bar
LOCAL/module/path

Ah found the way..

go list -f '{{join .Deps "
"}}' |  xargs go list -f '{{if not .Standard}}{{.ImportPath}}{{end}} ' | sort | uniq