"istio.io/istio/pkg/file"
	"istio.io/istio/pkg/util/sets"
)

// Copies/mirrors any files present in a single source dir to N number of target dirs
// and returns a set of the filenames copied.
func copyBinaries(srcDir string, targetDirs []string) (sets.String, error) {
	copiedFilenames := sets.String{}
	srcFiles, err := os.ReadDir(srcDir)
	if err != nil {
		return copiedFilenames, err
	}

	for _, f := range srcFiles {

			}

			targetDir := t.TempDir()
			for filename, contents := range c.existingFiles {
				file.WriteOrFail(t, filepath.Join(targetDir, filename), []byte(contents))
			}

			binariesCopied, err := copyBinaries(srcDir, []string{targetDir})
			if err != nil {
				t.Fatal(err)
			}

			for filename, expectedContents := range c.expectedFiles {
				contents := file.AsStringOrFail(t, filepath.Join(targetDir, filename))

	// Install binaries
	// Currently we _always_ do this, since the binaries do not live in a shared location
	// and we harm no one by doing so.
	copiedFiles, err := copyBinaries(in.cfg.CNIBinSourceDir, in.cfg.CNIBinTargetDirs)
	if err != nil {
		cniInstalls.With(resultLabel.Value(resultCopyBinariesFailure)).Increment()
		return copiedFiles, fmt.Errorf("copy binaries: %v", err)
	}