update vendor/

vendor/github.com/marcsauter/single/single_windows.go

@@ -0,0 +1,44 @@
+// +build windows
+
+package single
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// Filename returns an absolute filename, appropriate for the operating system
+func (s *Single) Filename() string {
+	if len(Lockfile) > 0 {
+		return Lockfile
+	}
+	return filepath.Join(os.TempDir(), fmt.Sprintf("%s.lock", s.name))
+}
+
+// CheckLock tries to obtain an exclude lock on a lockfile and returns an error if one occurs
+func (s *Single) CheckLock() error {
+
+	if err := os.Remove(s.Filename()); err != nil && !os.IsNotExist(err) {
+		return ErrAlreadyRunning
+	}
+
+	file, err := os.OpenFile(s.Filename(), os.O_EXCL|os.O_CREATE, 0600)
+	if err != nil {
+		return err
+	}
+	s.file = file
+
+	return nil
+}
+
+// TryUnlock closes and removes the lockfile
+func (s *Single) TryUnlock() error {
+	if err := s.file.Close(); err != nil {
+		return fmt.Errorf("failed to close the lock file: %v", err)
+	}
+	if err := os.Remove(s.Filename()); err != nil {
+		return fmt.Errorf("failed to remove the lock file: %v", err)
+	}
+	return nil
+}