在Go中嵌入脚本语言

Question

Is it possible to embed a language inside Go? With example on how the embedded language could access Go's variables. I need it to create plugins inside my application.

Answer 1

At the first, I'll explain cgo. Go provides API to export values into C language.

http://golang.org/cmd/cgo/

For example, you can export string as char* like below.

package main

/*
#include <stdio.h>
static void myputs(char* s) {
    puts(s);
}
*/
import "C"

func main() {
    s := "hello world"
    C.myputs(C.CString(s))
}

So you need to write functions to access C library. But there are some packages to use script languages. See:

https://github.com/mattn/go-mruby

https://github.com/mattn/go-v8

Or if you don't want to use C language. You can use native go language like otto

https://github.com/robertkrimen/otto

https://github.com/mattn/anko