1 files changed, 43 insertions, 0 deletions
diff --git a/cmd/podman/common/diffChanges.go b/cmd/podman/common/diffChanges.go
new file mode 100644
index 000000000..4aa485acc
--- /dev/null
+++ b/cmd/podman/common/diffChanges.go
@@ -0,0 +1,43 @@
+package common
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/containers/podman/v2/pkg/domain/entities"
+	"github.com/containers/storage/pkg/archive"
+	"github.com/pkg/errors"
+)
+
+type ChangesReportJSON struct {
+	Changed []string `json:"changed,omitempty"`
+	Added   []string `json:"added,omitempty"`
+	Deleted []string `json:"deleted,omitempty"`
+}
+
+func ChangesToJSON(diffs *entities.DiffReport) error {
+	body := ChangesReportJSON{}
+	for _, row := range diffs.Changes {
+		switch row.Kind {
+		case archive.ChangeAdd:
+			body.Added = append(body.Added, row.Path)
+		case archive.ChangeDelete:
+			body.Deleted = append(body.Deleted, row.Path)
+		case archive.ChangeModify:
+			body.Changed = append(body.Changed, row.Path)
+		default:
+			return errors.Errorf("output kind %q not recognized", row.Kind)
+		}
+	}
+
+	// Pull in configured json library
+	enc := json.NewEncoder(os.Stdout)
+	return enc.Encode(body)
+}
+
+func ChangesToTable(diffs *entities.DiffReport) error {
+	for _, row := range diffs.Changes {
+		fmt.Fprintln(os.Stdout, row.String())
+	}
+	return nil
+}