Function writeDiff

plugins/diff/erofs/compare_linux.go:44–55

(ctx context.Context, w io.Writer, lower []mount.Mount, upperRoot string)

)

func writeDiff(ctx context.Context, w io.Writer, lower []mount.Mount, upperRoot string) error {
	var opts []archive.ChangeWriterOpt

	return mount.WithTempMount(ctx, lower, func(lowerRoot string) error {
		cw := archive.NewChangeWriter(w, upperRoot, opts...)
		err := fs.DiffDirChanges(ctx, lowerRoot, upperRoot, fs.DiffSourceOverlayFS, cw.HandleChange)
		if err != nil {
			return fmt.Errorf("failed to create diff tar stream: %w", err)
		}
		return cw.Close()
	})
}

// Compare creates a diff between the given mounts and uploads the result
// to the content store.