internal/rosa: lazy initialise all artifacts

This improves performance, though not as drastically as lazy initialising llvm.

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

cmd/mbf/main.go

@@ -143,24 +143,52 @@ func main() {
 			if len(args) != 1 {
 				return errors.New("cure requires 1 argument")
 			}
-			var a pkg.Artifact
+			var p rosa.PArtifact
 			switch args[0] {
+			case "autoconf":
+				p = rosa.Autoconf
+			case "bash":
+				p = rosa.Bash
 			case "busybox":
-				a = rosa.Std.NewBusybox()
-			case "musl":
-				a = rosa.Std.NewMusl(nil)
+				p = rosa.Busybox
+			case "cmake":
+				p = rosa.CMake
+			case "coreutils":
+				p = rosa.Coreutils
+			case "diffutils":
+				p = rosa.Diffutils
+			case "gettext":
+				p = rosa.Gettext
 			case "git":
-				a = rosa.Std.NewGit()
+				p = rosa.Git
 			case "go":
-				a = rosa.Std.NewGo()
+				p = rosa.Go
+			case "kernel-headers":
+				p = rosa.KernelHeaders
+			case "libffi":
+				p = rosa.Libffi
+			case "m4":
+				p = rosa.M4
+			case "make":
+				p = rosa.Make
+			case "ninja":
+				p = rosa.Ninja
+			case "perl":
+				p = rosa.Perl
+			case "patch":
+				p = rosa.Patch
+			case "python":
+				p = rosa.Python
 			case "rsync":
-				a = rosa.Std.NewRsync()
+				p = rosa.Rsync
+			case "zlib":
+				p = rosa.Zlib
 
 			default:
 				return fmt.Errorf("unsupported artifact %q", args[0])
 			}
 
-			pathname, _, err := cache.Cure(a)
+			pathname, _, err := cache.Cure(rosa.Std.Load(p))
 			if err == nil {
 				log.Println(pathname)
 			}