move dependencies to vendor

vendor/github.com/docker/libcontainer/error.go

@@ -0,0 +1,62 @@
+package libcontainer
+
+import "io"
+
+// API error code type.
+type ErrorCode int
+
+// API error codes.
+const (
+	// Factory errors
+	IdInUse ErrorCode = iota
+	InvalidIdFormat
+
+	// Container errors
+	ContainerNotExists
+	ContainerPaused
+	ContainerNotStopped
+	ContainerNotRunning
+
+	// Process errors
+	ProcessNotExecuted
+
+	// Common errors
+	ConfigInvalid
+	SystemError
+)
+
+func (c ErrorCode) String() string {
+	switch c {
+	case IdInUse:
+		return "Id already in use"
+	case InvalidIdFormat:
+		return "Invalid format"
+	case ContainerPaused:
+		return "Container paused"
+	case ConfigInvalid:
+		return "Invalid configuration"
+	case SystemError:
+		return "System error"
+	case ContainerNotExists:
+		return "Container does not exist"
+	case ContainerNotStopped:
+		return "Container is not stopped"
+	case ContainerNotRunning:
+		return "Container is not running"
+	default:
+		return "Unknown error"
+	}
+}
+
+// API Error type.
+type Error interface {
+	error
+
+	// Returns a verbose string including the error message
+	// and a representation of the stack trace suitable for
+	// printing.
+	Detail(w io.Writer) error
+
+	// Returns the error code for this error.
+	Code() ErrorCode
+}