update corefile-migration library to 1.0.8

vendor/github.com/coredns/corefile-migration/migration/corefile/corefile.go

@@ -76,7 +76,7 @@ func (c *Corefile) ToString() (out string) {
 }
 
 func (s *Server) ToString() (out string) {
-	str := strings.Join(s.DomPorts, " ")
+	str := strings.Join(escapeArgs(s.DomPorts), " ")
 	strs := []string{}
 	for _, p := range s.Plugins {
 		strs = append(strs, strings.Repeat(" ", indent)+p.ToString())
@@ -88,7 +88,7 @@ func (s *Server) ToString() (out string) {
 }
 
 func (p *Plugin) ToString() (out string) {
-	str := strings.Join(append([]string{p.Name}, p.Args...), " ")
+	str := strings.Join(append([]string{p.Name}, escapeArgs(p.Args)...), " ")
 	strs := []string{}
 	for _, o := range p.Options {
 		strs = append(strs, strings.Repeat(" ", indent*2)+o.ToString())
@@ -100,10 +100,26 @@ func (p *Plugin) ToString() (out string) {
 }
 
 func (o *Option) ToString() (out string) {
-	str := strings.Join(append([]string{o.Name}, o.Args...), " ")
+	str := strings.Join(append([]string{o.Name}, escapeArgs(o.Args)...), " ")
 	return str
 }
 
+// escapeArgs returns the arguments list escaping and wrapping any argument containing whitespace in quotes
+func escapeArgs(args []string) []string {
+	var escapedArgs []string
+	for _, a := range args {
+		// if there is white space, wrap argument with quotes
+		if len(strings.Fields(a)) > 1 {
+			// escape quotes
+			a = strings.Replace(a, "\"", "\\\"", -1)
+			// wrap with quotes
+			a = "\"" + a + "\""
+		}
+		escapedArgs = append(escapedArgs, a)
+	}
+	return escapedArgs
+}
+
 func (s *Server) FindMatch(def []*Server) (*Server, bool) {
 NextServer:
 	for _, sDef := range def {

vendor/github.com/coredns/corefile-migration/migration/migrate.go

@@ -6,6 +6,7 @@ package migration
 // helper functions that make this easier to implement.
 
 import (
+	"errors"
 	"fmt"
 	"regexp"
 	"sort"
@@ -27,7 +28,7 @@ func Unsupported(fromCoreDNSVersion, toCoreDNSVersion, corefileStr string) ([]No
 }
 
 func getStatus(fromCoreDNSVersion, toCoreDNSVersion, corefileStr, status string) ([]Notice, error) {
-	err := validUpMigration(fromCoreDNSVersion, toCoreDNSVersion)
+	err := ValidUpMigration(fromCoreDNSVersion, toCoreDNSVersion)
 	if err != nil {
 		return nil, err
 	}
@@ -128,7 +129,7 @@ func Migrate(fromCoreDNSVersion, toCoreDNSVersion, corefileStr string, deprecati
 	if fromCoreDNSVersion == toCoreDNSVersion {
 		return corefileStr, nil
 	}
-	err := validUpMigration(fromCoreDNSVersion, toCoreDNSVersion)
+	err := ValidUpMigration(fromCoreDNSVersion, toCoreDNSVersion)
 	if err != nil {
 		return "", err
 	}
@@ -394,6 +395,16 @@ func Released(dockerImageSHA string) bool {
 	return false
 }
 
+// VersionFromSHA returns the version string matching the dockerImageSHA.
+func VersionFromSHA(dockerImageSHA string) (string, error) {
+	for vStr, v := range Versions {
+		if v.dockerImageSHA == dockerImageSHA {
+			return vStr, nil
+		}
+	}
+	return "", errors.New("sha unsupported")
+}
+
 // ValidVersions returns a list of all versions defined
 func ValidVersions() []string {
 	var vStrs []string
@@ -404,14 +415,7 @@ func ValidVersions() []string {
 	return vStrs
 }
 
-func validateVersion(fromCoreDNSVersion string) error {
-	if _, ok := Versions[fromCoreDNSVersion]; !ok {
-		return fmt.Errorf("start version '%v' not supported", fromCoreDNSVersion)
-	}
-	return nil
-}
-
-func validUpMigration(fromCoreDNSVersion, toCoreDNSVersion string) error {
+func ValidUpMigration(fromCoreDNSVersion, toCoreDNSVersion string) error {
 
 	err := validateVersion(fromCoreDNSVersion)
 	if err != nil {
@@ -429,6 +433,13 @@ func validUpMigration(fromCoreDNSVersion, toCoreDNSVersion string) error {
 	return fmt.Errorf("cannot migrate up to '%v' from '%v'", toCoreDNSVersion, fromCoreDNSVersion)
 }
 
+func validateVersion(fromCoreDNSVersion string) error {
+	if _, ok := Versions[fromCoreDNSVersion]; !ok {
+		return fmt.Errorf("start version '%v' not supported", fromCoreDNSVersion)
+	}
+	return nil
+}
+
 func validDownMigration(fromCoreDNSVersion, toCoreDNSVersion string) error {
 	err := validateVersion(fromCoreDNSVersion)
 	if err != nil {