SBOM does not get built for minirootfs

[alexhaydock]

I'm trying to explore using apko to build minirootfs images and I'm exploring SBOM generation as part of this.

When calling apko build-minirootfs --help I see:

      --sbom-path string                     generate an SBOM

Which does appear to come from build-minirootfs.go specifically:

apko/internal/cli/build-minirootfs.go

Line 59 in dd5a700

build.WithSBOM(sbomPath),

apko/internal/cli/build-minirootfs.go

Line 69 in dd5a700

cmd.Flags().StringVar(&sbomPath, "sbom-path", "", "generate an SBOM")

But unless I'm missing something, I think that although that sbomPath argument does get passed into BuildMinirootFSCmd, I don't think the BuildMinirootFSCmd function actually does anything with it.

Am I missing something, or is the SBOM generation not actually fully hooked-up for minirootfs builds?