Pablo Carranza Velez 31d09e70e4 Explicitly define the source for deltas, allow cross-app deltas, and iterate serially through apps when updating
This commit changes the way the source for a delta is determined. We used to do
it by comparing the available tags with the one we want and relying on the format that
includes the app in the image name. Now we explicitly choose a delta source from the previous app
version if we have one, and otherwise use the image from any available app - which will allow us
to have a valid source when moving a device between apps.

For this to work consistently if there's an unexpected reboot, we now avoid deleting an app from the db
until the full update has succeeded. Instead, we mark the app for deletion so that we still have the image stored after the reboot.

This commit also changes a .map to .mapSeries when iterating over appIds for removal/install/update - this avoids parallel treatment
of apps which can cause inconsistencies in the status reported to the API.

Change-Type: patch
Signed-off-by: Pablo Carranza Velez <pablo@resin.io>
2017-09-14 14:52:06 -07:00
..