How to get ComponentCatalog from MLContext?

[montebhoover]

For NimbusML we have a "ManifestGenerator" that creates the EntryPoint manifest.json from a given set of ML.NET assemblies. Currently we implement this the same way it is implemented in TestEntryPoints.cs, but ConsoleEnvironment has been made internal, and ML.Context doesn't have a ComponentCatalog. What are ways I could get access to a ComponentCatalog and use JsonManifestUtils to build a new manifest.json?

@Ivanidzo4ka @yaeldekel @ganik

[montebhoover]

Probably more importantly is figuring out how to load the assemblies in NimbusML's bridge to ML.NET now that the items in the ComponentCatalog have been internalized:

https://github.com/Microsoft/NimbusML/blob/80ce48f0505eba1564dafd2dfd249905ee7b6143/src/DotNetBridge/Bridge.cs#L309

[montebhoover]

#2063 addresses this.

[eerhardt]

How to get ComponentCatalog from MLContext?

Cast it to an IHostEnvironment and use the ComponentCatalog property:

((IHostEnvironment)new MLContext()).ComponentCatalog

[montebhoover]

Thanks Eric!