如何检查“获取<package>”的安装状态？

Question

Is there any option for go get that can tell me whether it actually did anything?

For example, if the package X was already installed, I would like to know that go get X didn't perform any downloading/installation.

Answer 1

Use go get -v

Here's an example of get doing something vs not:

$ go get -v  github.com/peak6/envflag
github.com/peak6/envflag (download) # downloaded package
github.com/peak6/envflag # built package (I think)

$ go get -v  github.com/peak6/envflag
$ # nothing to do