Handling dependencies

[radu-matei]

spin.toml allows defining a list of dependencies that the main component requires in order to be instantiated:

    [component.dependencies]
        cache    = { type = "host" }
        markdown = { type = "component", reference = "github/octo-markdown/1.0.0" }

However, the behavior of how this section should be used is not currently implemented (or specified).

Proposal: at startup, there should be a step that links the entrypoint module using the components specified in this section, and generates a "linked" component that can be directly instantiated by the execution context (engine).

This section could be potentially generated from Cargo.toml in the case of Rust (the format and necessary information is the same).

[radu-matei]

While this is still something we want to do, we don't currently have a clear way of achieving it.
Additionally, spin.toml no longer has component.dependencies, so this issue is also out of date.

Closing for now.