relocate all model functionality to declcfg and eliminate model package

Signed-off-by: grokspawn <jordan@nimblewidget.com>

Author: grokspawn

alpha/action/init.go

@@ -5,6 +5,7 @@ import (
 	"io"
 
 	"github.com/h2non/filetype"
+	"github.com/h2non/go-is-svg"
 
 	"github.com/operator-framework/operator-registry/alpha/declcfg"
 )
@@ -36,16 +37,31 @@ func (i Init) Run() (*declcfg.Package, error) {
 		if err != nil {
 			return nil, fmt.Errorf("read icon: %v", err)
 		}
+
+		// Try filetype detection first
 		iconType, err := filetype.Match(iconData)
 		if err != nil {
 			return nil, fmt.Errorf("detect icon mediatype: %v", err)
 		}
-		if iconType.MIME.Type != "image" {
-			return nil, fmt.Errorf("detected invalid type %q: not an image", iconType.MIME.Value)
+
+		var mediaType string
+		// If filetype didn't detect it, check if it's SVG
+		if iconType.MIME.Value == "" {
+			if issvg.Is(iconData) {
+				mediaType = "image/svg+xml"
+			} else {
+				return nil, fmt.Errorf("detected invalid type %q: not an image", iconType.MIME.Value)
+			}
+		} else {
+			if iconType.MIME.Type != "image" {
+				return nil, fmt.Errorf("detected invalid type %q: not an image", iconType.MIME.Value)
+			}
+			mediaType = iconType.MIME.Value
 		}
+
 		pkg.Icon = &declcfg.Icon{
 			Data:      iconData,
-			MediaType: iconType.MIME.Value,
+			MediaType: mediaType,
 		}
 	}
 	return pkg, nil