fix: update lego.

vendor/github.com/rancher/go-rancher-metadata/metadata/change.go

@@ -1,64 +0,0 @@
-package metadata
-
-import (
-	"encoding/json"
-	"fmt"
-	"time"
-
-	"github.com/sirupsen/logrus"
-)
-
-func (m *client) OnChangeWithError(intervalSeconds int, do func(string)) error {
-	return m.onChangeFromVersionWithError("init", intervalSeconds, do)
-}
-
-func (m *client) onChangeFromVersionWithError(version string, intervalSeconds int, do func(string)) error {
-	for {
-		newVersion, err := m.waitVersion(intervalSeconds, version)
-		if err != nil {
-			return err
-		} else if version == newVersion {
-			logrus.Debug("No changes in metadata version")
-		} else {
-			logrus.Debugf("Metadata Version has been changed. Old version: %s. New version: %s.", version, newVersion)
-			version = newVersion
-			do(newVersion)
-		}
-	}
-
-	return nil
-}
-
-func (m *client) OnChange(intervalSeconds int, do func(string)) {
-	version := "init"
-	updateVersionAndDo := func(v string) {
-		version = v
-		do(version)
-	}
-	interval := time.Duration(intervalSeconds)
-	for {
-		if err := m.onChangeFromVersionWithError(version, intervalSeconds, updateVersionAndDo); err != nil {
-			logrus.Errorf("Error reading metadata version: %v", err)
-		}
-		time.Sleep(interval * time.Second)
-	}
-}
-
-type timeout interface {
-	Timeout() bool
-}
-
-func (m *client) waitVersion(maxWait int, version string) (string, error) {
-	for {
-		resp, err := m.SendRequest(fmt.Sprintf("/version?wait=true&value=%s&maxWait=%d", version, maxWait))
-		if err != nil {
-			t, ok := err.(timeout)
-			if ok && t.Timeout() {
-				continue
-			}
-			return "", err
-		}
-		err = json.Unmarshal(resp, &version)
-		return version, err
-	}
-}