add a simple Server type to start/stop scsynth

Author: briansorahan

server.go

@@ -0,0 +1,49 @@
+package sc
+
+import (
+	"fmt"
+	"os/exec"
+	"strconv"
+)
+
+// Server represents a running instance of scsynth.
+type Server struct {
+	*exec.Cmd
+
+	Network string
+	Port    int
+}
+
+// args gets the command line args to scsynth
+func (s *Server) args() ([]string, error) {
+	args := []string{}
+
+	var (
+		portArg = strconv.FormatInt(int64(s.Port), 10)
+	)
+	switch s.Network {
+	default:
+		return nil, fmt.Errorf("unrecognized network type: %s", s.Network)
+	case "udp":
+		args = append(args, "-u", portArg)
+	case "tcp":
+		args = append(args, "-t", portArg)
+	}
+
+	return args, nil
+}
+
+// Start starts a new instance of scsynth.
+func (s *Server) Start() error {
+	args, err := s.args()
+	if err != nil {
+		return err
+	}
+	s.Cmd = exec.Command(ServerPath, args...)
+	return s.Cmd.Start()
+}
+
+// Stop stops a running server.
+func (s *Server) Stop() error {
+	return s.Process.Kill()
+}

server_darwin.go

@@ -0,0 +1,4 @@
+// +build darwin
+package sc
+
+const ServerPath = "/Applications/SuperCollider.app/Contents/Resources/scsynth"