for k, v := range m {
		if v {
			s = append(s, k)
		}
	}
	return s
}

// ReadFilesWithFilter reads files from path, for a directory it recursively reads files and filters the results
// for single file it directly reads the file. It returns a concatenated output of all matching files' content.
func ReadFilesWithFilter(path string, filter FileFilter) (string, error) {
	fileList, err := FindFiles(path, filter)
	if err != nil {

func compareManifestsFromDirs(verbose bool, dirName1, dirName2,
	renameResources, selectResources, ignoreResources string,
) (bool, error) {
	mf1, err := util.ReadFilesWithFilter(dirName1, yamlFileFilter)
	if err != nil {
		return false, err
	}
	mf2, err := util.ReadFilesWithFilter(dirName2, yamlFileFilter)
	if err != nil {
		return false, err
	}

			}
			got, err := runManifestGenerate(filenames, tt.flags, csource, tt.fileSelect)
			if err != nil {
				t.Fatal(err)
			}

			if tt.outputDir != "" {
				got, err = util.ReadFilesWithFilter(tt.outputDir, func(fileName string) bool {
					return strings.HasSuffix(fileName, ".yaml")
				})
				if err != nil {
					t.Fatal(err)
				}
			}

			diffSelect := "*:*:*"