GO Function to retrieve call information

callinfo.go

package call

import (
	"path"
	"runtime"
	"strings"
)

type Info struct {
	Dir     string
	File    string
	Package string
	Line    int
	Type    string
	Func    string
	Call    string
}

func CallInfo(depth int) *Info {
	depth += 1
	pc, file, line, _ := runtime.Caller(depth)
	dir, fileName := path.Split(file)
	call := runtime.FuncForPC(pc).Name()	
	items := strings.Split(call, "/")
	p := strings.Split(items[len(items)-1], ".")
	var pkg, typ, fn string
	switch len(p) {
	case 3: // package, type, function
		pkg = p[0]
		typ = p[1]
		fn = p[2]
	case 2:
		pkg = p[0]
		fn = p[1]
	}

	return &Info{
		Dir:     dir,
		File:    fileName,
		Line:    line,
		Package: pkg,
		Type:    typ,
		Func:    fn,
		Call:    call,
	}
}