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package main
import (	"fmt"	"io/fs"	"os"	"os/exec"	"path"	"runtime")
func main() {
	var matches, err = (fs.Glob(os.DirFS("./"), "./*/go.mod"))	if err != nil {		return	}	c := make(chan struct{}, runtime.NumCPU())	for _, m := range matches {		go run(m, c)	}	for range matches {		<-c	}}func run(m string, out chan struct{}) {
	defer func() {		out <- struct{}{}	}()	cmd := exec.Command("go", "test", "-v")
	cmd.Dir = "./" + path.Dir(m)	fmt.Println(cmd.Dir, cmd)	cmd.Stdout = os.Stdout	cmd.Stderr = os.Stderr	var err = cmd.Run()	if err != nil {		panic(err)	}}