feature: added nsq as broker for events (#6740)

vendor/github.com/nsqio/go-nsq/config_flag.go

@@ -0,0 +1,31 @@
+package nsq
+
+import (
+	"strings"
+)
+
+// ConfigFlag wraps a Config and implements the flag.Value interface
+type ConfigFlag struct {
+	Config *Config
+}
+
+// Set takes a comma separated value and follows the rules in Config.Set
+// using the first field as the option key, and the second (if present) as the value
+func (c *ConfigFlag) Set(opt string) (err error) {
+	parts := strings.SplitN(opt, ",", 2)
+	key := parts[0]
+
+	switch len(parts) {
+	case 1:
+		// default options specified without a value to boolean true
+		err = c.Config.Set(key, true)
+	case 2:
+		err = c.Config.Set(key, parts[1])
+	}
+	return
+}
+
+// String implements the flag.Value interface
+func (c *ConfigFlag) String() string {
+	return ""
+}