Feat/version manifests (#387)

Signed-off-by: Fabian Kammel <fk@edgeless.systems>
Co-authored-by: Otto Bittner <cobittner@posteo.net>

hack/build-manifest/azure/options.go

@@ -0,0 +1,37 @@
+package azure
+
+import (
+	"fmt"
+
+	"github.com/google/uuid"
+)
+
+const (
+	DefaultResourceGroupName = "CONSTELLATION-IMAGES"
+	DefaultGalleryName       = "Constellation"
+	DefaultImageDefinition   = "constellation"
+)
+
+type Options struct {
+	SubscriptionID    string
+	ResourceGroupName string
+	GalleryName       string
+	ImageDefinition   string
+}
+
+func DefaultOptions() Options {
+	return Options{
+		SubscriptionID:    "",
+		ResourceGroupName: DefaultResourceGroupName,
+		GalleryName:       DefaultGalleryName,
+		ImageDefinition:   DefaultImageDefinition,
+	}
+}
+
+func (o *Options) SetSubscription(sub string) error {
+	if _, err := uuid.Parse(sub); err != nil {
+		return fmt.Errorf("unable to set subscription: %w", err)
+	}
+	o.SubscriptionID = sub
+	return nil
+}