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/cmake.go

@@ -8,15 +8,14 @@ import (
 	"hakurei.app/internal/pkg"
 )
 
-// NewCMake returns a [pkg.Artifact] containing an installation of CMake.
-func (t Toolchain) NewCMake() pkg.Artifact {
+func (t Toolchain) newCMake() pkg.Artifact {
 	const (
 		version  = "4.2.1"
 		checksum = "Y3OdbMsob6Xk2y1DCME6z4Fryb5_TkFD7knRT8dTNIRtSqbiCJyyDN9AxggN_I75"
 	)
 	return t.New("cmake-"+version, []pkg.Artifact{
-		t.NewMake(),
-		t.NewKernelHeaders(),
+		t.Load(Make),
+		t.Load(KernelHeaders),
 	}, nil, nil, `
 # expected to be writable in the copy made during bootstrap
 chmod -R +w /usr/src/cmake/Tests
@@ -37,6 +36,7 @@ make DESTDIR=/work install
 			pkg.TarGzip,
 		)))
 }
+func init() { artifactsF[CMake] = Toolchain.newCMake }
 
 // CMakeAttr holds the project-specific attributes that will be applied to a new
 // [pkg.Artifact] compiled via CMake.
@@ -95,8 +95,8 @@ chmod -R +w "${ROSA_SOURCE}"
 
 	sourcePath := AbsUsrSrc.Append(name)
 	return t.New(name+"-"+variant+"-"+version, stage3Concat(t, attr.Extra,
-		t.NewCMake(),
-		t.NewNinja(),
+		t.Load(CMake),
+		t.Load(Ninja),
 	), nil, slices.Concat([]string{
 		"ROSA_SOURCE=" + sourcePath.String(),
 		"ROSA_CMAKE_SOURCE=" + sourcePath.Append(attr.Append...).String(),