distro: add Manifest method to interface

For now, this simply wraps Pipeline and Sources, and retruns the
resulting manifest object. In the future, Pipeline and Sources
may be dropped from the interface.

Signed-off-by: Tom Gundersen <teg@jklm.no>

internal/distro/fedora30/distro.go

@@ -473,6 +473,18 @@ func (r *Fedora30) Sources(packages []rpmmd.PackageSpec) *osbuild.Sources {
 	return &osbuild.Sources{}
 }
 
+func (r *Fedora30) Manifest(b *blueprint.Blueprint, additionalRepos []rpmmd.RepoConfig, packageSpecs, buildPackageSpecs []rpmmd.PackageSpec, checksums map[string]string, outputArchitecture, outputFormat string, size uint64) (*osbuild.Manifest, error) {
+	pipeline, err := r.Pipeline(b, additionalRepos, packageSpecs, buildPackageSpecs, checksums, outputArchitecture, outputFormat, size)
+	if err != nil {
+		return nil, err
+	}
+
+	return &osbuild.Manifest{
+		Sources:  *r.Sources(append(packageSpecs, buildPackageSpecs...)),
+		Pipeline: *pipeline,
+	}, nil
+}
+
 func (r *Fedora30) Runner() string {
 	return "org.osbuild.fedora30"
 }