function addFile(filename) {
    var file = zip.addFile(filename);
    var sha = new SHAWriteStream(manifest, filename, file);
    return sha;
  }
function addFile(filename) {
    var file = zip.addFile(filename);
    var sha = new SHAWriteStream(manifest, filename, file);
    return sha;
  }
function addFile ( filename ) { var file = zip . addFile ( filename ) ; var sha = new SHAWriteStream ( manifest , filename , file ) ; return sha ; }
Add file to zip and it's SHA to manifest
Add file to zip and it s SHA to manifest