internal/rosa: lazy initialise all artifacts

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

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

internal/rosa/libffi.go

@@ -2,15 +2,14 @@ package rosa
 
 import "hakurei.app/internal/pkg"
 
-// NewLibffi returns a [pkg.Artifact] containing an installation of libffi.
-func (t Toolchain) NewLibffi() pkg.Artifact {
+func (t Toolchain) newLibffi() pkg.Artifact {
 	const (
 		version  = "3.4.5"
 		checksum = "apIJzypF4rDudeRoI_n3K7N-zCeBLTbQlHRn9NSAZqdLAWA80mR0gXPTpHsL7oMl"
 	)
 	return t.New("libffi-"+version, []pkg.Artifact{
-		t.NewMake(),
-		t.NewKernelHeaders(),
+		t.Load(Make),
+		t.Load(KernelHeaders),
 	}, nil, nil, `
 cd "$(mktemp -d)"
 /usr/src/libffi/configure \
@@ -26,3 +25,4 @@ make DESTDIR=/work install
 		pkg.TarGzip,
 	)))
 }
+func init() { artifactsF[Libffi] = Toolchain.newLibffi }