How do I install v2 with go 1.13?

[jotego]

If I run

go get -u github.com/pelletier/go-toml

I get the master branch version. How can I get the v2 branch version?

Thank you

[moorereason]

Try using github.com/pelletier/go-toml/v2

[pelletier]

Do you mind providing the error being shown?

go-toml is only guaranteed to work the last two go versions. I suspect this is an issue along the lines of 1.13 not having the appropriate module support or it not being turned on by default.

[jotego]

Absolutely, this is how it looks like:

[home/jtejada]$ go get github.com/pelletier/go-toml/v2
package github.com/pelletier/go-toml/v2: cannot find package "github.com/pelletier/go-toml/v2" in any of:
	/usr/lib/go-1.13/src/github.com/pelletier/go-toml/v2 (from $GOROOT)
	/home/jtejada/go/src/github.com/pelletier/go-toml/v2 (from $GOPATH)

By removing v2, the master version seems to get installed correctly.

[pelletier]

Looks like you need GO111MODULE=on when running go 1.13.

For example, this seems to work:

root@f01403f699f6:~# go version
go version go1.13.8 linux/amd64
root@f01403f699f6:~# cat main.go 
package main

import "github.com/pelletier/go-toml/v2"
import "fmt"

func main() {
	x := map[string]interface{}{"hello":"world"}
	a, _ := toml.Marshal(x)
	fmt.Println(a)
}
root@f01403f699f6:~# GO111MODULE=on go run main.go 
[104 101 108 108 111 32 61 32 39 119 111 114 108 100 39 10]

[jotego]

That worked like a charm

[home/jtejada]$ go get github.com/pelletier/go-toml/v2
go: finding github.com/pelletier/go-toml/v2 v2.0.0-beta.3
go: finding github.com/pelletier/go-toml v1.9.3
go: downloading github.com/pelletier/go-toml v1.9.3
go: downloading github.com/pelletier/go-toml/v2 v2.0.0-beta.3
go: extracting github.com/pelletier/go-toml v1.9.3
go: extracting github.com/pelletier/go-toml/v2 v2.0.0-beta.3

I am sorry I didn't know about GO111MODULE. Thanks for your help.

[pelletier]

Nice! Glad to hear it worked! Posted an answer in case someone has the same question and comes across this post.

[pelletier]

go-toml uses Go's standard modules system. As such, you either need one of:

• use Go 1.16
• use Go 1.13+ with a go.mod in your package
• or set the environment variable GO111MODULE=on

[lietu]

Could you include this information including the go get github.com/pelletier/go-toml/v2 in the main README or at least for v2? Right now it reads a bit like "you should use v2, good luck figuring out how mwahahahaha" if you have to find some discussion thread for the relevant information.

[pelletier]

The v2 README provides the correct import path for go v2, which is the standard way of using packages since 1.16. This answer is about how to use any Go module with versions < 1.16. Given go-toml only supports the last two versions of Go and 1.17 is just around the corner, I felt like the README didn't need more non-toml-specific information. I'm fine with adding that info in the meantime, but that should become fairly irrelevant soon.

[pelletier]

Done: https://github.com/pelletier/go-toml/tree/v2#Modules