feat: Add basic STFS.ReplacesContent PAX record support in indexer

cmd/stbak/cmd/index.go

@@ -270,6 +270,22 @@ func indexHeader(record, block int64, hdr *tar.Header, metadataPersister *persis
 			if _, err := metadataPersister.DeleteHeader(context.Background(), hdr.Name, true); err != nil {
 				return err
 			}
+		case pax.STFSReplacesContent:
+			if hdr.PAXRecords[pax.STFSReplacesContent] == pax.STFSReplacesContentTrue {
+				// Metadata & content update
+				// TODO: Add implementation
+				return pax.ErrUnsupportedAction
+			} else {
+				// Metadata-only update
+				dbhdr, err := converters.TarHeaderToDBHeader(record, block, hdr)
+				if err != nil {
+					return err
+				}
+
+				if err := metadataPersister.UpdateHeaderMetadata(context.Background(), dbhdr); err != nil {
+					return err
+				}
+			}
 		default:
 			return pax.ErrUnsupportedAction
 		}

pkg/pax/stfs.go

@@ -9,6 +9,10 @@ const (
 	STFSRecordAction       = "STFS.Action"
 	STFSRecordActionCreate = "CREATE"
 	STFSRecordActionDelete = "DELETE"
+
+	STFSReplacesContent      = "STFS.ReplacesContent"
+	STFSReplacesContentTrue  = "true"
+	STFSReplacesContentFalse = "false"
 )
 
 var (

pkg/persisters/metadata.go

@@ -54,6 +54,23 @@ func (p *MetadataPersister) UpsertHeader(ctx context.Context, dbhdr *models.Head
 	return nil
 }
 
+func (p *MetadataPersister) UpdateHeaderMetadata(ctx context.Context, dbhdr *models.Header) error {
+	currentHdr, err := models.FindHeader(ctx, p.db, dbhdr.Name, models.HeaderColumns.Name, models.HeaderColumns.Record, models.HeaderColumns.Block)
+	if err != nil {
+		return err
+	}
+
+	// Update everything but the record & block
+	dbhdr.Record = currentHdr.Record
+	dbhdr.Block = currentHdr.Block
+
+	if _, err := dbhdr.Update(ctx, p.db, boil.Infer()); err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (p *MetadataPersister) GetHeaders(ctx context.Context) (models.HeaderSlice, error) {
 	return models.Headers().All(ctx, p.db)
 }