manifest: add RawOSTreeImage

The RawOSTreeImage pipeline is the OSTree-equivalent to the RawImage.
The serialization is very similar between the two (almost identical),
but the two Pipelines depend on different Tree implementations.

Co-Authored-By: Ondřej Budai <ondrej@budai.cz>

internal/manifest/raw_ostree.go

@@ -0,0 +1,67 @@
+package manifest
+
+import (
+	"github.com/osbuild/osbuild-composer/internal/artifact"
+	"github.com/osbuild/osbuild-composer/internal/osbuild"
+)
+
+// A RawOSTreeImage represents a raw ostree image file which can be booted in a
+// hypervisor. It is created from an existing OSTreeDeployment.
+type RawOSTreeImage struct {
+	Base
+	treePipeline *OSTreeDeployment
+	Filename     string
+}
+
+func NewRawOStreeImage(m *Manifest,
+	buildPipeline *Build,
+	treePipeline *OSTreeDeployment) *RawOSTreeImage {
+	p := &RawOSTreeImage{
+		Base:         NewBase(m, "image", buildPipeline),
+		treePipeline: treePipeline,
+		Filename:     "disk.img",
+	}
+	buildPipeline.addDependent(p)
+	if treePipeline.Base.manifest != m {
+		panic("tree pipeline from different manifest")
+	}
+	m.addPipeline(p)
+	return p
+}
+
+func (p *RawOSTreeImage) getBuildPackages() []string {
+	return p.treePipeline.PartitionTable.GetBuildPackages()
+}
+
+func (p *RawOSTreeImage) serialize() osbuild.Pipeline {
+	pipeline := p.Base.serialize()
+
+	pt := p.treePipeline.PartitionTable
+	if pt == nil {
+		panic("no partition table in live image")
+	}
+
+	for _, stage := range osbuild.GenImagePrepareStages(pt, p.Filename, osbuild.PTSfdisk) {
+		pipeline.AddStage(stage)
+	}
+
+	inputName := "root-tree"
+	copyOptions, copyDevices, copyMounts := osbuild.GenCopyFSTreeOptions(inputName, p.treePipeline.Name(), p.Filename, pt)
+	copyInputs := osbuild.NewCopyStagePipelineTreeInputs(inputName, p.treePipeline.Name())
+	pipeline.AddStage(osbuild.NewCopyStage(copyOptions, copyInputs, copyDevices, copyMounts))
+
+	for _, stage := range osbuild.GenImageFinishStages(pt, p.Filename) {
+		pipeline.AddStage(stage)
+	}
+
+	if grubLegacy := p.treePipeline.platform.GetBIOSPlatform(); grubLegacy != "" {
+		pipeline.AddStage(osbuild.NewGrub2InstStage(osbuild.NewGrub2InstStageOption(p.Filename, pt, grubLegacy)))
+	}
+
+	return pipeline
+}
+
+func (p *RawOSTreeImage) Export() *artifact.Artifact {
+	p.Base.export = true
+	return artifact.New(p.Name(), p.Filename, nil)
+}