Maint: rename openvpn command.go to start.go

internal/openvpn/config/start.go

@@ -0,0 +1,45 @@
+package config
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os/exec"
+	"syscall"
+
+	"github.com/qdm12/gluetun/internal/constants"
+)
+
+var ErrVersionUnknown = errors.New("OpenVPN version is unknown")
+
+const (
+	binOpenvpn24 = "openvpn2.4"
+	binOpenvpn25 = "openvpn"
+)
+
+type Starter interface {
+	Start(ctx context.Context, version string, flags []string) (
+		stdoutLines, stderrLines chan string, waitError chan error, err error)
+}
+
+func (c *Configurator) Start(ctx context.Context, version string, flags []string) (
+	stdoutLines, stderrLines chan string, waitError chan error, err error) {
+	var bin string
+	switch version {
+	case constants.Openvpn24:
+		bin = binOpenvpn24
+	case constants.Openvpn25:
+		bin = binOpenvpn25
+	default:
+		return nil, nil, nil, fmt.Errorf("%w: %s", ErrVersionUnknown, version)
+	}
+
+	c.logger.Info("starting OpenVPN " + version)
+
+	args := []string{"--config", constants.OpenVPNConf}
+	args = append(args, flags...)
+	cmd := exec.CommandContext(ctx, bin, args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	return c.cmder.Start(cmd)
+}