This allows the CLI to expose options that the renderers can offer.
These options are limited (string, int, bool and bytes), so no lists
or choices, etc.
Each renderer's options are also global options, meaning they're always
present (although grouped). There's two ways of handling this:
a) Prefix each option with the renderer's name, duplicate options are
unique
b) Deduplicate options with duplicate names and prefix 'renderer'
The current choice is a) because b) might confuse people that an option
which only applied to one renderer would be available for all, but
comes with the inconvenience that users must adapt the option name for
those that are duplicated with the same meaning.
This is at least functional and extendable in the future but still a bit
clunky. We could have brought the entire configuration mechanism into
play, but each renderer would require a context and a config_path and
so on, meaning massive overkill and a non-addition-only API change.
Note: creation of enumerations can be done using Context.object, which
should allow reference of enumeration members by normal type objects.
If it turns out enumerations are never referenced from types, we can
easily remove the try/except in the Module.object method.
Context.object accepts a template or a string name (and now a type
flag). Module.object only accepts a string (because a template already
has most of the stuff built in and might as well be passed to the
Context.object constructor).
The gotcha here is the absolute flag, which must now be set
appropriately in all cases *except* where the module is constructed
with an offset of 0 (whereby it will have no impact).
This removes the assertions that checked plugin devs didn't do anything
overly bad in favour of using mypy to ensure appropriate type-checking.
It also moves the ProgressCallback typing information to constants in
order to avoid circular imports (since constants doesn't import
anything).
Added object extensions for the key structures. Also added
constants.linux, which will contain Linux-specific constants
that can't be extracted via dwarf.
Mike Auty