An error will be reported when using third-party packages on Windows

[xiayudeshijie]

vm.go file
package main

import (
"github.com/gin-gonic/gin"
)

func Gin() {
r := gin.Default()
r.GET("/ping", func(c *gin.Context) {
c.JSON(200, gin.H{
"message": "pong",
})
})

r.Run()

}

and main.go file
content, err := ioutil.ReadFile("vm.go")
if err != nil {
fmt.Println("read file failed")
}
source := string(content)
src := strings.NewReader(source)
// int gomacro
interp := fast.New()
// check code
if _, err := interp.EvalReader(src); err != nil {
fmt.Println("-------------")
}
interp.ChangePackage("main", "main")
interp.Eval(Gin())

then run main.go
// debug: running "go get github.com/gin-gonic/gin" ...
// warning: created files in "C:\Users\Administrator\go\src\github.com\cosmos72\gomacro\imports/thirdparty", recompile gomacro to use it
repl.go:8:7: undefined "gin" in gin.Default <*ast.SelectorExpr>
Error: repl.go:17:1: undefined identifier: Gin

How to resolve this problem?

[cosmos72]

Hello @xiayudeshijie,

Importing third-party packages at runtime is not supported on Windows, because the plugin Go package required for such feature does not (yet) work on Windows.

Such limitation is documented in the main README: https://github.com/cosmos72/gomacro#other-systems

As a workaround, you can use gomacro inside a virtual machine running a Linux guest operating system.
Some examples of free virtual machine programs are:

• WSL i.e. Windows Subsystem for Linux, is preinstalled on Windows 11
• Docker
• Oracle VirtualBox
• Microsoft Parallels (trial version is free)
• VMware Workstation Player
  etc.

[xiayudeshijie]

Thanks