Add "System Update" app and launcher status bar plugin

[rkunze]

With the new SD card file system layout introduced in 79e363f and the system update script from 8c1f14f, we have the necessary functionality for "Over-the-Air" automatic system updates for the community firmware — we just need a launcher status bar plugin that periodically checks if a new version is available, and a GUI app that displays update metadata (version number etc.) and provides an "Install Update" button.

[harbaum]

Would it perhaps make sense to integrate the functionality of the about app into this new update app? It's already dealing with system versions and licenses.

[ski7777]

Some days ago you said it make more sense splitting functionalities is different apps. So I would prefer to split this into two apps. Raphael Till Harbaum <notifications@github.com> schrieb am Fr., 3. März 2017, 22:01:

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Would it perhaps make sense to integrate the functionality of the about app into this new update app? It's already dealing with system versions and licenses. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#78 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQa6kRW0npkKNmjImrWPOT9LL6IOX0CXks5riH-5gaJpZM4MSuts> .

[rkunze]

No, I don't think we should integrate "Update" and "About", even if both apps deal with firmware versions and display information — the functionality is too different: "About" tells the user what is currently installed (i.e. it only displays information), and "Update" installs a new version (i.e it changes the system). I for one would not expect the "Update" functionality in something labelled "About"...

Extending the "About" app to indicate if a new version is available (in the "Firmware" line on the "Versions" page) could be a good idea, though.

[harbaum]

Fine for me ... that was just a suggestion.

[harbaum]

Such a status bar plugin would import all the qt libraries required to deal with sending http requests. Is the ability to display the update icon really worth the additional load time and memory?

[rkunze]

Depends - mainly on how much impact the HTTP stuff really has. Do you have any figures for that?

And do we really need to use the Qt HTTP libs? My plan was to use the "native" HTTP support from python (urllib.request).

[ski7777]

I think urllib.request is enough. We just need one request to the Github API. Raphael

[ski7777]

Can anybody check master...ski7777:update-app ? Just the translation is not working and I don't know why

Raphael

[ski7777]

Bump!

[PeterDHabermehl]

Just commented on PR#83 #83
My understanding is that #83 is not ready because of the blocking behavior of the http request. I would like to close PR83 and leave this issue open.
Any objections?