Add build date to self endpoint

Signed-off-by: Mark Anderson <manderson@hashicorp.com>

agent/agent_endpoint.go

@@ -91,6 +91,7 @@ func (s *HTTPHandlers) AgentSelf(resp http.ResponseWriter, req *http.Request) (i
 		Revision          string
 		Server            bool
 		Version           string
+		BuildDate         string
 	}{
 		Datacenter:        s.agent.config.Datacenter,
 		PrimaryDatacenter: s.agent.config.PrimaryDatacenter,
@@ -100,8 +101,10 @@ func (s *HTTPHandlers) AgentSelf(resp http.ResponseWriter, req *http.Request) (i
 		Revision:          s.agent.config.Revision,
 		Server:            s.agent.config.ServerMode,
 		// We expect the ent version to be part of the reported version string, and that's now part of the metadata, not the actual version.
-		Version: s.agent.config.VersionWithMetadata(),
+		Version:   s.agent.config.VersionWithMetadata(),
+		BuildDate: s.agent.config.BuildDate.Format(time.RFC3339),
 	}
+
 	return Self{
 		Config:      config,
 		DebugConfig: s.agent.config.Sanitized(),

agent/config/runtime.go

@@ -1701,6 +1701,10 @@ func sanitize(name string, v reflect.Value) reflect.Value {
 		x := v.Interface().(time.Duration)
 		return reflect.ValueOf(x.String())
 
+	case isTime(typ):
+		x := v.Interface().(time.Time)
+		return reflect.ValueOf(x.String())
+
 	case isString(typ):
 		if strings.HasPrefix(name, "RetryJoinLAN[") || strings.HasPrefix(name, "RetryJoinWAN[") {
 			x := v.Interface().(string)
@@ -1772,6 +1776,7 @@ func sanitize(name string, v reflect.Value) reflect.Value {
 }
 
 func isDuration(t reflect.Type) bool { return t == reflect.TypeOf(time.Second) }
+func isTime(t reflect.Type) bool     { return t == reflect.TypeOf(time.Time{}) }
 func isMap(t reflect.Type) bool      { return t.Kind() == reflect.Map }
 func isNetAddr(t reflect.Type) bool  { return t.Implements(reflect.TypeOf((*net.Addr)(nil)).Elem()) }
 func isPtr(t reflect.Type) bool      { return t.Kind() == reflect.Ptr }