It is easier to put screenshots somewhere where
they can be searched-for, rather than requiring either
absolute paths (inconvenient to try out someone's
settings) or relative paths (because who knows where
Calamares will be run during testing).
Rip out most of the ViewStep that deals with configuration,
move it to a Config object (not one that supports QML yet,
though), and massage the model a little.
The single-values *package* member in a PackageItem was not used,
so remove it -- to show that it really isn't used. This is prep-
work for putting the package name *back*, as multi-valued,
and using the *packages* module.
- point to main Calamares site in the 'part of' headers instead
of to github (this is the "this file is part of Calamares"
opening line for most files).
- remove boilerplate from all source files, CMake modules and completions,
this is the 3-paragraph summary of the GPL-3.0-or-later, which has
a meaning entirely covered by the SPDX tag.
- These don't have to be static methods of PackageItem, a free
function is more convenient.
- Since it's not API of PackageItem anymore, need to
- update tests not to use API
- do API-not-available warnings in consumers
- Use *appstream* as key in one of the items for the package-
chooser to load data from the AppStream cache in the system.
- Usable for some applications; for DE-selection not so much.
- Currently unimplemented.
- Put the implementation entirely in a separate file, keep the
not-supported one in PackageModel.cpp (but only in an #ifdef).
- Makes the various optional-data-sources more similar.
- The ID and Screenshot entries might be weird in AppData (in particular,
a remove URL) so put those back under the control of Calamares even
when using AppData as the source of descriptions.
- Document all the static inline methods that do the work
- Fill up a QVariantMap from <name>, <summary> and <description><p>
elements, and use that to initialize the PackageItem.
- Doing a manual read of the XML, since existing appdata libraries
don't seem to have a convenient entry for what I need.
- Expand tests to loading AppData (currently, they fail).
