internal/rosa: build independent earlyinit

This avoids unnecessarily rebuilding hakurei during development.

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

internal/rosa/images.go

@@ -2,10 +2,32 @@ package rosa
 
 import "hakurei.app/internal/pkg"
 
+func init() {
+	artifactsM[EarlyInit] = Metadata{
+		Name:        "earlyinit",
+		Description: "Rosa OS initramfs init program",
+
+		f: func(t Toolchain) (pkg.Artifact, string) {
+			return t.newHakurei("-early-init", `
+mkdir -p /work/system/libexec/hakurei/
+
+echo '# Building earlyinit.'
+go build -trimpath -v -o /work/system/libexec/hakurei -ldflags="-s -w
+	-buildid=
+	-linkmode external
+	-extldflags=-static
+	-X hakurei.app/internal/info.buildVersion=${HAKUREI_VERSION}
+" ./cmd/earlyinit
+echo
+`, false), Unversioned
+		},
+	}
+}
+
 func (t Toolchain) newImageInitramfs() (pkg.Artifact, string) {
 	return t.New("initramfs", TNoToolchain, []pkg.Artifact{
 		t.Load(Zstd),
-		t.Load(Hakurei),
+		t.Load(EarlyInit),
 		t.Load(GenInitCPIO),
 	}, nil, nil, `
 gen_init_cpio -t 4294967295 -c /usr/src/initramfs | zstd > /work/initramfs.zst