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/xz.go

@@ -2,7 +2,7 @@ package rosa
 
 import "hakurei.app/internal/pkg"
 
-func (t Toolchain) newXZ() pkg.Artifact {
+func (t Toolchain) newXZ() (pkg.Artifact, string) {
 	const (
 		version  = "5.8.2"
 		checksum = "rXT-XCp9R2q6cXqJ5qenp0cmGPfiENQiU3BWtUVeVgArfRmSsISeUJgvCR3zI0a0"
@@ -14,6 +14,14 @@ func (t Toolchain) newXZ() pkg.Artifact {
 		pkg.TarBzip2,
 	), nil, (*MakeHelper)(nil),
 		Diffutils,
-	)
+	), version
+}
+func init() {
+	artifactsM[XZ] = Metadata{
+		f: Toolchain.newXZ,
+
+		Name:        "xz",
+		Description: "XZ Utils",
+		Website:     "https://tukaani.org/xz/",
+	}
 }
-func init() { artifactsF[XZ] = Toolchain.newXZ }