[add] yao.system.Exec process

main.go

@@ -7,6 +7,7 @@ import (
 	_ "github.com/yaoapp/yao/crypto"
 	_ "github.com/yaoapp/yao/helper"
 	_ "github.com/yaoapp/yao/network"
+	_ "github.com/yaoapp/yao/system"
 	_ "github.com/yaoapp/yao/user"
 	_ "github.com/yaoapp/yao/xfs"
 )

system/process.go

@@ -0,0 +1,42 @@
+package system
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+
+	"github.com/yaoapp/gou"
+	"github.com/yaoapp/kun/exception"
+)
+
+func init() {
+	gou.RegisterProcessHandler("yao.system.Exec", processExec)
+}
+
+// processExec execute the system command
+func processExec(process *gou.Process) interface{} {
+	process.ValidateArgNums(1)
+	cmd := process.ArgsString(0)
+
+	_, err := exec.LookPath(cmd)
+	if err != nil {
+		exception.New("command %s not found: %s", 400, cmd, err.Error()).Throw()
+		return nil
+	}
+
+	args := []string{}
+	for i, arg := range process.Args {
+		if i == 0 {
+			continue
+		}
+		args = append(args, fmt.Sprintf("%v", arg))
+	}
+
+	res, err := exec.Command(cmd, args...).Output()
+	if err != nil {
+		exception.New("command %s error: %s", 500, cmd, err.Error()).Throw()
+		return nil
+	}
+
+	return strings.TrimRight(string(res), "\n")
+}

system/process_test.go

@@ -0,0 +1,16 @@
+package system
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/yaoapp/gou"
+)
+
+func TestProcessReturn(t *testing.T) {
+	output, err := gou.NewProcess("yao.system.Exec", "echo", "hello").Exec()
+	if err != nil {
+		t.Fatal(err)
+	}
+	assert.Equal(t, "hello", output)
+}

system/system.go

@@ -0,0 +1,4 @@
+package system
+
+// Exec call system command
+func Exec(cmd string, args ...string) {}