Function parsePipeToArgs

src/pull.js:129–153

* Parse variadic arguments for pipeTo/pipeToSync. * Returns { transforms, writer, options }

(args)

 * Returns { transforms, writer, options }
 */
function parsePipeToArgs(args) {
    if (args.length === 0) {
        throw new TypeError('pipeTo requires a writer argument');
    }
    var options;
    var writerIndex = args.length - 1;
    // Check if last arg is options
    var last = args[args.length - 1];
    if ((0, utils_js_1.isPullOptions)(last) && !isWriter(last)) {
        options = last;
        writerIndex = args.length - 2;
    }
    if (writerIndex < 0) {
        throw new TypeError('pipeTo requires a writer argument');
    }
    var writer = args[writerIndex];
    if (!isWriter(writer)) {
        throw new TypeError('pipeTo requires a writer argument with a write method');
    }
    return {
        transforms: args.slice(0, writerIndex),
        writer: writer,
        options: options,
    };
}
// =============================================================================
// Transform Output Flattening
// =============================================================================