fix: daemon version bugs (#120)

Fixes a bug where the daemon nix file path is incorrect causing errors
when reading and updating the version. Also fixed the server to properly
respond to the error returned by the daemon when this occurred. And
finally, fixed a bad comparison which was pointer compare instead of
attribute compare.

services/platform/daemon/host/files.go

@@ -62,7 +62,7 @@ func NixosVarsFile() string {
 }
 
 func DaemonNixFile() string {
-	return FilePath(NixosRoot, "daemon/default.nix")
+	return FilePath(NixosRoot, "home-cloud/daemon/default.nix")
 }
 
 func NixosConfigsPath() string {

services/platform/server/system/os.go

@@ -68,6 +68,10 @@ func (c *controller) CheckForOSUpdates(ctx context.Context, logger chassis.Logge
 	// get the current daemon version from the daemon
 	listener = async.RegisterListener(ctx, c.broadcaster, &async.ListenerOptions[*dv1.CurrentDaemonVersion]{
 		Callback: func(event *dv1.CurrentDaemonVersion) (bool, error) {
+			if event.Error != nil {
+				logger.WithError(fmt.Errorf(event.Error.Error)).Error("failed to get current daemon version")
+				return true, fmt.Errorf(event.Error.Error)
+			}
 			response.DaemonVersions = &v1.DaemonVersions{
 				Current: &v1.DaemonVersion{
 					Version:    event.Version,
@@ -149,7 +153,10 @@ func (u *controller) UpdateOS(ctx context.Context, logger chassis.Logger) error
 
 	// if the daemon needs updating, install it along with the os updates
 	// otherwise just install the os update
-	if updates.DaemonVersions.Current != updates.DaemonVersions.Latest {
+	if updates.DaemonVersions.Current.Version != updates.DaemonVersions.Latest.Version &&
+		updates.DaemonVersions.Current.SrcHash != updates.DaemonVersions.Latest.SrcHash &&
+		updates.DaemonVersions.Current.VendorHash != updates.DaemonVersions.Latest.VendorHash {
+		logger.Info("updating daemon along with os")
 		err = com.Send(&dv1.ServerMessage{
 			Message: &dv1.ServerMessage_ChangeDaemonVersionCommand{
 				ChangeDaemonVersionCommand: &dv1.ChangeDaemonVersionCommand{