internal/rosa/make: migrate to helper interface

This also updates all affected artifacts to use new behaviour.

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

internal/rosa/libucontext.go

@@ -7,24 +7,24 @@ func (t Toolchain) newLibucontext() pkg.Artifact {
 		version  = "1.5"
 		checksum = "Ggk7FMmDNBdCx1Z9PcNWWW6LSpjGYssn2vU0GK5BLXJYw7ZxZbA2m_eSgT9TFnIG"
 	)
-	return t.NewViaMake("libucontext", version, t.NewPatchedSource(
-		"libucontext", version, pkg.NewHTTPGetTar(
-			nil, "https://github.com/kaniini/libucontext/archive/refs/tags/"+
-				"libucontext-"+version+".tar.gz",
-			mustDecode(checksum),
-			pkg.TarGzip,
-		), false,
-	), &MakeAttr{
-		Writable:      true,
+	return t.NewPackage("libucontext", version, pkg.NewHTTPGetTar(
+		nil, "https://github.com/kaniini/libucontext/archive/refs/tags/"+
+			"libucontext-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	), &PackageAttr{
+		// uses source tree as scratch space
+		Writable:    true,
+		Chmod:       true,
+		EnterSource: true,
+	}, &MakeHelper{
 		OmitDefaults:  true,
 		SkipConfigure: true,
 		InPlace:       true,
-
-		ScriptEarly: "cd /usr/src/libucontext",
 		Make: []string{
 			"ARCH=" + linuxArch(),
 		},
-		ScriptInstall: "make prefix=/system DESTDIR=/work install",
+		Install: "make prefix=/system DESTDIR=/work install",
 	})
 }
 func init() { artifactsF[Libucontext] = Toolchain.newLibucontext }