win: add missing hidewindow syscall

runner/runner.go

@@ -52,6 +52,7 @@ func Run(conf *service.Service) {
 
 		start := time.Now()
 		cmd := exec.Command(binpath, args...)
+		backgroundCmd(cmd)
 		fmt.Fprintf(lf, "[%s] Starting %q %s \n", time.Now(), binpath, strings.Join(args, " "))
 
 		cmd.Stdin = nil

runner/runner_notwindows.go

@@ -0,0 +1,8 @@
+// +build !windows
+
+package runner
+
+import "os/exec"
+
+func backgroundCmd(cmd *exec.Cmd) {
+}

runner/runner_windows.go

@@ -2,11 +2,9 @@ package runner
 
 import (
 	"os/exec"
+	"syscall"
 )
 
-func init() {
-	cmd, _ := exec.LookPath("cmd.exe")
-	if "" != cmd {
-	  shellArgs = []string{cmd, "/c"}
-	}
+func backgroundCmd(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
 }