golang是否有用于下载的第三方软件包的中央存储库？

Question

I'm new to Golang. As I understand, when you want to create a new Go project, we just need to create a directory. Then we point the environment variable GOPATH to this directory. Inside this directory, we create three subdirectories pkg, src and bin. Then when we execute go get ..., the third-party package will be installed in the pkg subdirectory. Later if I want to create another Go project, I create a new dir called project2 and point GOPATH to project2. At this time go get ... will download third-party package in the pkg subdirectory of project2. My question is, whether Go has a central repository? If not, the same package will be downloaded twice if they are used in two different projects. Is that true?

Answer 1

There is no central repository of go packages. Go always is looking for packages either in GOPATH or GOROOT. go get simply downloads packages using git or mercurial. I recommend you to read https://golang.org/doc/code.html and https://peter.bourgon.org/go-best-practices-2016/#repository-structure

GOPATH simply tells go compiler where to search for src, pkg directories.