Support `.mobi` eBook format

[myii]

Asked about .mobi on the main UBports Telegram group and the advice was to create an issue about it here.

Are there any plans to support the .mobi format in the future?

[TronFortyTwo]

Thanks for your report. Adding support for mobi files would be a good feature, I will consider adding it.

[TronFortyTwo]

If/when the calibre backends (in the calibre branch) lands, support for a lot of epub formats can be easily implemented hopefully

[myii]

@TronFortyTwo Great, sounds good. Is it possible to test that right now by building using the calibre branch?

[TronFortyTwo]

@myii Yes, that is the way to test it. Keep in mind thought that the branch is experimental (I currently have problems with some encoding stuff)

[myii]

@TronFortyTwo First attempt at installing this via. clickable results in an error:

Package calibre:armhf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'calibre:armhf' has no installation candidate
The command '/bin/sh -c apt-get update && apt-get install -y --force-yes --no-install-recommends gettext intltool:armhf qtdeclarative5-u1db1.0:armhf qtdeclarative5-usermetrics0.1:armhf qtdeclarative5-ubuntu-cont
ent1:armhf libpoppler-qt5-dev:armhf calibre:armhf python-apsw:armhf libmagickwand-6.q16-2:armhf liblqr-1-0:armhf && apt-get clean' returned a non-zero code: 100
Command exited with non-zero exit status 100, see above for details. This is most likely not a problem with Clickable.

[TronFortyTwo]

@myii Thanks for the report, that's because some confusion in Clickable selecting the right arch for calibre to install. I will eventually fix that. I've never seen that error before beacause I usually don't use clickable on my computer for the calibre branch.
That's my workflow: I access the ut device from USB and clickable shell
I create on the device a container with
sudo debootstrap xenial container-name and I enter with sudo chroot container-name
Then I install clickable inside the container and build Sturm Reader with clickable --container-mode
Hope it helps.