Packages: radicale: upgrade to 2.x

[DragoonAethis]

Maintainer: @chris5560
Environment: LEDE 17.01.4

Radicale 2.x (currently at 2.1.8) was released a few months ago. Now that it had some time to mature, it'd be a solid idea to upgrade the package in this repo. The 2.x branch now requires Python 3.x (dropping 2.x completely), but consumes a bit less memory than 1.x and (finally) properly synchronizes calendars which use a bit more obscure iCal features (date-based filters in recurring events, per-event colors, etc).

2.x isn't backwards compatible with 1.x data - storage needs to be migrated first, as described on this page. This can be automated, but then Radicale still needs to be reconfigured. It'd be preferred to leave 1.x up and running in LEDE/OpenWrt 17.01.x and upgrade to 2.x in the next release.

[chris5560]

Hi Dragoon,

please feel free to build a 2.x package and take over "Maintainer" for it.
I'm currently short on time to build and test a 2.x package.
I think we should have two packages for a while 1.x and 2.x, so user can decide when to change/upgrade independent from OpenWrt release.
I offer my support to (re)write a corresponding Luci application.

Christian

[DragoonAethis]

I never did any packages for OpenWrt previously, but I'll try to package it in about 2 weeks.

Edit: After fighting with the toolchain for a few hours, I couldn't get it to build most packages with somewhat uncommon errors. This will have to wait for a while...

[jefferyto]

@DragoonAethis you may be interested in #7871.

[jefferyto]

I think this can be closed now :smile:

[DragoonAethis]

Awesome, thank you! I'll try to test it soon :)