Example of go module methods using local packages

go module is very simple to use

Initialize go mod

go mod init

Collate dependent packages

go mod tidy

If you want to cache to the vendor directory

go mod vendor

The dependencies are automatically fixed after the command is executed.

However, if we are a locally developed package, how do we solve the local package dependency problem when there is no remote repository?

Use replace to replace remote packages with local package services

Fortunately, go module offers another option, replace. How does this replace work?

Let's start with a basic mod file

module GoRoomDemo
go 1.12
require (
  github.com/gin-gonic/gin v1.3.0
  github.com/gohouse/goroom v0.0.0-20190327052827-9ab674039336
  github.com/golang/protobuf v1.3.1 // indirect
  github.com/gomodule/redigo v2.0.0+incompatible
  github.com/mattn/go-sqlite3 v1.10.0
  github.com/stretchr/testify v1.3.0 // indirect
  golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53 // indirect
)

This is a dependency package for a simple GoRoom framework. If I want to use the native goroom, I just need to use replace

module GoRoomDemo

go 1.12

require (
  github.com/gin-gonic/gin v1.3.0
  github.com/gohouse/goroom v0.0.0-20190327052827-9ab674039336
  github.com/golang/protobuf v1.3.1 // indirect
  github.com/gomodule/redigo v2.0.0+incompatible
  github.com/mattn/go-sqlite3 v1.10.0
  github.com/stretchr/testify v1.3.0 // indirect
  golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53 // indirect
)

replace github.com/gohouse/goroom => /path/to/go/src/github.com/gohouse/goroom

Here, path/to/go/src/github.com/gohouse/goroom Is the local packet path

This way, we can happily use the local directory