internal/rosa: provide package metadata

This had to be done out-of-band because there was no way to efficiently represent these within Artifact.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/stage0.go

@@ -7,7 +7,7 @@ import (
 	"hakurei.app/internal/pkg"
 )
 
-func (t Toolchain) newStage0() pkg.Artifact {
+func (t Toolchain) newStage0() (pkg.Artifact, string) {
 	musl, compilerRT, runtimes, clang := t.NewLLVM()
 	return t.New("rosa-stage0", 0, []pkg.Artifact{
 		musl,
@@ -39,9 +39,16 @@ tar \
 	-C / \
 	-f /work/stage0-`+triplet()+`.tar.bz2 \
 	system bin usr/bin/env
-`)
+`), Unversioned
+}
+func init() {
+	artifactsM[Stage0] = Metadata{
+		f: Toolchain.newStage0,
+
+		Name:        "rosa-stage0",
+		Description: "Rosa OS stage0 toolchain tarball for bootstrap",
+	}
 }
-func init() { artifactsF[Stage0] = Toolchain.newStage0 }
 
 var (
 	// stage0 stores the tarball unpack artifact.