[bug#42885] [PATCH 23/27] gnu: calibre: Update to 5.13.0.

[Leo Famulari <leo@famulari.name>]

On Tue, Apr 06, 2021 at 03:30:08AM +0200, Brendan Tildesley wrote:
> Sounds good. I didn't realise propagated-inputs did that, I thought they were
> just normal inputs that were installed along side the package in a profile,
> but wouldn't make a difference during build time.
> Does this mean all packages that depend on python-pyqt5 will have python-pyqt5-sip
> added to its own list of inputs in their own package definition? If so
> the manual doesn't mention that.

That's the idea: they are run-time dependencies of a package that lacks
the ability for recording references to its dependencies. We have to
help the package with our packaging tools.

In general, all Python packages in Guix use this mechanism.

Just to clarify, does Calibre work on your end with my latest Savannah
branch? I built it on CI, so you can get substitutes for it on x86_64.

The basics work for me: library management, conversion, etc.

I think we're almost done!

> I find writing them the most stressful part because I sit there not knowing
> what to write.

Don't hesitate to send in your patches with a note like, "I didn't know
what to put here".