add group and summary fields

pkg/build/script_executor.go

@@ -304,6 +304,7 @@ func buildPkgMetadata(
 		Provides:  append(vars.Provides, vars.Name),
 		Depends:   deps,
 	}
+	pkgInfo.Section = vars.Group
 
 	pkgFormat := input.PkgFormat()
 	info := input.OSRelease()
@@ -315,6 +316,17 @@ func buildPkgMetadata(
 		})
 	}
 
+	if pkgFormat == "rpm" {
+		pkgInfo.RPM.Group = vars.Group
+
+		if vars.Summary != "" {
+			pkgInfo.RPM.Summary = vars.Summary
+		} else {
+			lines := strings.SplitN(vars.Description, "\n", 2)
+			pkgInfo.RPM.Summary = lines[0]
+		}
+	}
+
 	if vars.Epoch != 0 {
 		pkgInfo.Epoch = strconv.FormatUint(uint64(vars.Epoch), 10)
 	}