Merge pull request #38053 from tiborvass/bk-fix-filters

builder: fix bugs when pruning buildkit cache with filters

builder/builder-next/builder.go

@@ -530,20 +530,26 @@ func toBuildkitPruneInfo(opts types.BuildCachePruneOptions) (client.PruneInfo, e
 
 	bkFilter := make([]string, 0, opts.Filters.Len())
 	for cacheField := range cacheFields {
+		if opts.Filters.Include(cacheField) {
 			values := opts.Filters.Get(cacheField)
 			switch len(values) {
 			case 0:
 				bkFilter = append(bkFilter, cacheField)
 			case 1:
+				if cacheField == "id" {
+					bkFilter = append(bkFilter, cacheField+"~="+values[0])
+				} else {
 					bkFilter = append(bkFilter, cacheField+"=="+values[0])
+				}
 			default:
 				return client.PruneInfo{}, errMultipleFilterValues
 			}
 		}
+	}
 	return client.PruneInfo{
 		All:          opts.All,
 		KeepDuration: unusedFor,
 		KeepBytes:    opts.KeepStorage,
-		Filter:       bkFilter,
+		Filter:       []string{strings.Join(bkFilter, ",")},
 	}, nil
 }