Stream: wasi

Topic: ✔ Component Model common export

Jan Vanhoof (Jun 10 2025 at 08:49):

Thank you, that is what I thought.

I was aware of the WAC tool, but it's documentation jumps from simple examples to quite complex formal specification.

I wasn't sure that I might not have overlooked some details which might have made it possible.

Notification Bot (Jun 10 2025 at 08:49):

Jan Vanhoof has marked this topic as resolved.

Jan Vanhoof (Jun 20 2025 at 14:24):

I did some further tests and I think I've got my answers.

I'll leave my findings in case someone else stumbles upon it.

• What was not clear for me from the WAC documentation (although it is actually mentioned now I know) is that all the imports of the components that are not fulfilled by an export will be merged as an import for the resulting composition.
• An export can be linked to multiple imports, but not the other way around. Not sure what I did wrong last time in wasmbuilder.app, but now it worked.
• You can import and reexport the same interface, however, in my example it wouldn't have worked, as component A already imports the run function exported by component B. If component B would import something from component A that would result in a cyclic graph, which is not allowed.

Notification Bot (Jun 20 2025 at 14:24):

Jan Vanhoof has marked this topic as resolved.

Last updated: Dec 06 2025 at 06:05 UTC