build error: net/smtp module reports undefined: tls.Conn

[everyx]

❯ tinygo run verifier.go 
# net/smtp
/usr/lib/go/src/net/smtp/smtp.go:72:24: undefined: tls.Conn
/usr/lib/go/src/net/smtp/smtp.go:172:25: undefined: tls.Conn

verifier.go

package main

import (
	"encoding/json"
	"fmt"

	emailVerifier "github.com/AfterShip/email-verifier"
)

type Result struct {
	Data  *emailVerifier.Result `json:"data"`
	Error error                 `json:"error"`
}

func (p Result) ToJson(result Result) (*string, error) {
	bytes, err := json.Marshal(result)

	if err != nil {
		fmt.Println("Error converting to JSON:", err)
		return nil, err
	}

	json := string(bytes)

	return &json, nil
}

//export add
func verify(email string) string {
	var result Result

	verifier := emailVerifier.NewVerifier().EnableAutoUpdateDisposable()

	ret, err := verifier.Verify(email)
	if err != nil {
		result = Result{
			Data:  nil,
			Error: err,
		}
	} else {
		result = Result{
			Data:  ret,
			Error: nil,
		}
	}

	bytes, err := json.Marshal(result)
	if err != nil {
		fmt.Println("Error converting to JSON:", err)
		return fmt.Sprintf("{error:%s}", err.Error())
	}

	return string(bytes)
}

func main() {
	fmt.Println(verify("[email protected]"))
}

[scottfeldman]

This isn't working because current TinyGo TLS support is only for baremetal devices with mbed firmware for offloading the TLS protocol. TinyGo will redirect tls calls down to mbed firmware.

Seems we need someway at compile time to pick which 'net' and 'crypto/tls' packages for the target. If targeting WASM or non-baremetal, pick the standard Go packages. If targeting baremetal, pick the TinyGo 'net' and 'crypto/tls' packages.