internal/rosa: basic system image

This is a simple image for debugging and is not yet set up for dm-verity.

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

internal/rosa/all.go

@@ -22,6 +22,8 @@ const (
 
 	// EarlyInit is the Rosa OS initramfs init program.
 	EarlyInit
+	// ImageSystem is the Rosa OS /system image.
+	ImageSystem
 	// ImageInitramfs is the Rosa OS initramfs archive.
 	ImageInitramfs
 

internal/rosa/images.go

@@ -1,6 +1,9 @@
 package rosa
 
-import "hakurei.app/internal/pkg"
+import (
+	"hakurei.app/container/fhs"
+	"hakurei.app/internal/pkg"
+)
 
 func init() {
 	artifactsM[EarlyInit] = Metadata{
@@ -24,12 +27,32 @@ echo
 	}
 }
 
+func (t Toolchain) newImageSystem() (pkg.Artifact, string) {
+	return t.New("system.img", TNoToolchain, t.AppendPresets(nil,
+		SquashfsTools,
+	), nil, nil, `
+mksquashfs /mnt/system /work/system.img
+`, pkg.Path(fhs.AbsRoot.Append("mnt"), false,
+		t.Load(Musl),
+		t.Load(Mksh),
+		t.Load(Toybox),
+	)), Unversioned
+}
+func init() {
+	artifactsM[ImageSystem] = Metadata{
+		Name:        "system-image",
+		Description: "Rosa OS system image",
+
+		f: Toolchain.newImageSystem,
+	}
+}
+
 func (t Toolchain) newImageInitramfs() (pkg.Artifact, string) {
-	return t.New("initramfs", TNoToolchain, []pkg.Artifact{
-		t.Load(Zstd),
-		t.Load(EarlyInit),
-		t.Load(GenInitCPIO),
-	}, nil, nil, `
+	return t.New("initramfs", TNoToolchain, t.AppendPresets(nil,
+		Zstd,
+		EarlyInit,
+		GenInitCPIO,
+	), nil, nil, `
 gen_init_cpio -t 4294967295 -c /usr/src/initramfs | zstd > /work/initramfs.zst
 `, pkg.Path(AbsUsrSrc.Append("initramfs"), false, pkg.NewFile("initramfs", []byte(`
 dir /dev 0755 0 0