Migrate from DEP to GO Modules

[aperezg]

Migrate the repository from DEP to the new Go Modules.

Signed-off-by: aperezg [email protected]

[bzz]

@aperezg thank you for contribution!

JFY - current src-d engineering conventions suggest using Dep for dependency management although migration to modules is widely discussed and the necessity is acknowledged (I presume @smola can elaborate on that if necessary).

As go modules is quite new feature, adding few lines of description on how the migration was made would help to build some confidence and make sure maintainers and @vmarkovtsev understand and may wish to adopt new dependency management workflow.

[aperezg]

@aperezg thank you for contribution!

JFY - current src-d engineering conventions suggest using Dep for dependency management although migration to modules is widely discussed and the necessity is acknowledged (I presume @smola can elaborate on that if necessary).

As go modules is quite new feature, adding few lines of description on how the migration was made would help to build some confidence and make sure maintainers and @vmarkovtsev understand and may wish to adopt new dependency management workflow.

@bzz thank you for your explanation, I understand that actually src-d is working with Dep and the "Go Modules" are a relative newly feature.

I decided to migrate this repository for only formative purpose, I've got a Go community with a partner in Spain, and we recently talk about "Go Modules". The src-d company is a company that we like it, and that's the reason why we think that we can migrate one of their libraries to "Go Modules" and there here is hehehe.

Well, the workflow that I followed to migrate the library was the next.

First of all I checked the application working from scratch.

go test ./...

And

go run cmd/license-detector/main.go https://github.com/friendsofgo/graphiql

Then when I realized that all working fine, with standard configuration, I began with the migration:

go mod init

With this command, the go.mod file with the dependencies from Gopkg.toml was created.

Then I executed

go mod tidy

Now I had the go.mod and go.sum with all neccessary dependencies of the projects, even the test dependencies.

Now I needed to check that all continues working, for that purpose I remove the unneccessary files

rm -rf Gopkg.toml Gopkg.lock vendor

And then I executed the tests again

go test ./...

And

go run cmd/license-detector/main.go https://github.com/friendsofgo/graphiql

When I checked that, the output was the expected, I launched one more command

go mod vendor

To keep it working the other (older) dependency managers.

And that's all! I understand that this PR may not to be merged, but it was a pleasure collaborate with you.

[vmarkovtsev]

I have never used modules, but I guess if we have some problems in the future I will be able to fix them. Thanks @aperezg