The battery status is shared between instances. The only time
this should be freed is when only one instance remains. Now
multiple instances can be added or removed without hindering
the display of sysinfo and batman instances. Inline with
recent FreeBSD and OpenBSD fixes.
When we add a batman gadget to the desktop it previously would
reset the values of all existing batman instances. Here we
ignore the dummy instance used when adding to desktop or
a gadget bar.
Summary: This fixes issues where erroneous udev detections of batteries are included. @bu5hm4n and I both have had issues where udev thinks we have two batteries because our hid/touchscreens report a battery even though they are not accurate. The problem is batman will then think there are two batteries and calculate battery percentage based off both batteries. For instance if the laptop battery is 100% and it is detecting this phony hid battery, the result is batman thinks you are at 50% battery life. This also fixes the battery removal code which should only remove the battery with the syspath the function is called with. The code was actually removing every single battery.
Test Plan: You have to have a device that udev reports two batteries for when there aren't two. It should be harmless to not include batteries that have never been charged, have no charge, and have unknown for their status.
Reviewers: bu5hm4n, raster, zmike!, devilhorns
Reviewed By: raster
Subscribers: cedric, bu5hm4n
Tags: #enlightenment-git
Differential Revision: https://phab.enlightenment.org/D7736
Alastair Poole
Stephen 'Okra' Houston
Mike Blumenkrantz