This is useful for Flatpak runtime and app authors who want to know
which features they can use when targeting a particular branch,
or if they do not have a particular branch in mind, what value they
should put in the required-flatpak field.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Add support for collection IDs to the code which finds and pulls
related refs and other extensions.
Currently, related refs must have the same collection ID as the parent
ref — this is the most likely scenario anyway. In future, it should be
possible to extend the code to support pulling related refs from other
collections.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Differentiate between the 'extension point' (definition of
a place where extensions can be mounted) and the 'extension'
(a runtime matching an extension point).
