This change moves all plugin handling code into the kas.plugins module.
New accessor functions `plugins.get(name)` and `plugins.all()` are
provided to wrap the plugins dictionary so that the kas main function
doesn't need to worry about how this is accessed. Plugins are loaded at
runtime rather than at parse time by calling `plugins.load()` which
gives us an improved ability to handle errors.
The `@kasplugin` decorator is removed as it modified and attribute on
the kasplugin function itself when a plugin module was loaded. Importing
a module should not result in changes to a variable in a different
module as it leads to an initialization code flow which is difficult to
reason about. Instead, plugin modules should now list the plugins which
they introduce in a `__KAS_PLUGINS__` list which will be walked at
runtime by `plugins.load()`.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This change groups the plugin modules together under kas.plugins and
moves the @kasplugin decorator to this submodule. This will ensure the
codebase stays organised as more plugins are added.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
