VOL-381 add unum container to support ONOS cluster formation under swarm
Change-Id: Ic260edda19bb199ed040f05164ab605f28c919d0
diff --git a/unum/vendor/github.com/docker/libtrust/filter.go b/unum/vendor/github.com/docker/libtrust/filter.go
new file mode 100644
index 0000000..5b2b4fc
--- /dev/null
+++ b/unum/vendor/github.com/docker/libtrust/filter.go
@@ -0,0 +1,50 @@
+package libtrust
+
+import (
+ "path/filepath"
+)
+
+// FilterByHosts filters the list of PublicKeys to only those which contain a
+// 'hosts' pattern which matches the given host. If *includeEmpty* is true,
+// then keys which do not specify any hosts are also returned.
+func FilterByHosts(keys []PublicKey, host string, includeEmpty bool) ([]PublicKey, error) {
+ filtered := make([]PublicKey, 0, len(keys))
+
+ for _, pubKey := range keys {
+ var hosts []string
+ switch v := pubKey.GetExtendedField("hosts").(type) {
+ case []string:
+ hosts = v
+ case []interface{}:
+ for _, value := range v {
+ h, ok := value.(string)
+ if !ok {
+ continue
+ }
+ hosts = append(hosts, h)
+ }
+ }
+
+ if len(hosts) == 0 {
+ if includeEmpty {
+ filtered = append(filtered, pubKey)
+ }
+ continue
+ }
+
+ // Check if any hosts match pattern
+ for _, hostPattern := range hosts {
+ match, err := filepath.Match(hostPattern, host)
+ if err != nil {
+ return nil, err
+ }
+
+ if match {
+ filtered = append(filtered, pubKey)
+ continue
+ }
+ }
+ }
+
+ return filtered, nil
+}