Support pure go+ module

[cpunion]

Proposal

1. Support import a pure go+ package in the current project

E.g. a project structure like the below:

├── foo
│   └── foo.gop
├── go.mod
├── go.sum
├── gop.mod
└── main.gop

It should be possible to import the package foo from main.gop directly.

2. Support import a pure go+ module on the GitHub

It should be possible to import "github.com/x/y" or import "github.com/x/y/z", when github.com/x/y is a pure go+ module, and the package y is a pure go+ package in it.

Background

To develop a go+ project, we want to write pure go+ code everywhere, we also want to publish the pure go+ modules.

Workarounds

For the packages in your project

Use https://github.com/cosmtrek/air to watch *.gop files changes, and run gop build ./....

For the packages from the other modules

Nothing.

[xushiwei]

https://github.com/goplus/gop/releases/tag/v1.1.0-alpha2