x/tools/gopls: change the module path and upgrade imports within the module

[godcong]

What version of Go are you using (go version)?

$ go version
go version go1.14.7 windows/amd64

　

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
//Has nothing to do with env

What did you do?

Now I usually modify the go.mod file.
Then modify some imports one by one.

What did you expect to see?

Sometimes a project may permanently move to a new address.
I hope go mod has any way to directly migrate my project to the new address.
Possible comannd like:

//I created a new project,use:
go mod init github.com/nameA/projectA

//When I need to migrate to a new address like nameB/projectB, to use:
go mod change github.com/nameA/projectA github.com/nameB/projectB 

Then all the imports of the project point to the new address.

What did you see instead?

Now I don't seem to see a similar function.
If there is no such feature, I hope it can be added.
If there is already have a similar functions, I hope to get some help.

[toothrot]

There are a number of tools for renaming import paths already. I am not sure that go mod is the appropriate place. If you need help finding such a tool, asking on one of the forums at http://golang.org/wiki/Questions is the best.

/cc @bcmills @jayconrod @matloob

[bcmills]

@marwan-at-work has a mod tool that will do this for major versions, I believe.

Such a tool would be out-of-place in cmd/go, which generally does not edit source files for you. But perhaps it would be a reasonable feature for gopls (CC @stamblerre).

[godcong]

Yes, go mod is not necessary.
Any extension that can achieve this function will do.
Because manual modification may bring some errors caused by human operation errors.