Prevent errors from breaking / crashing gulp watch

Question

I\'m running gulp 3.6.2 and have the following task that was set up from a sample online

gulp.task(\'watch\', [\'default\'], function () {
  gulp.watch([
            


        

Answer 1

I have implemented the following hack as a workaround for https://github.com/gulpjs/gulp/issues/71:

// Workaround for https://github.com/gulpjs/gulp/issues/71
var origSrc = gulp.src;
gulp.src = function () {
    return fixPipe(origSrc.apply(this, arguments));
};
function fixPipe(stream) {
    var origPipe = stream.pipe;
    stream.pipe = function (dest) {
        arguments[0] = dest.on('error', function (error) {
            var state = dest._readableState,
                pipesCount = state.pipesCount,
                pipes = state.pipes;
            if (pipesCount === 1) {
                pipes.emit('error', error);
            } else if (pipesCount > 1) {
                pipes.forEach(function (pipe) {
                    pipe.emit('error', error);
                });
            } else if (dest.listeners('error').length === 1) {
                throw error;
            }
        });
        return fixPipe(origPipe.apply(this, arguments));
    };
    return stream;
}

Add it to your gulpfile.js and use it like that:

gulp.src(src)
    // ...
    .pipe(uglify({compress: {}}))
    .pipe(gulp.dest('./dist'))
    .on('error', function (error) {
        console.error('' + error);
    });

This feels like the most natural error handling to me. If there is no error handler at all, it will throw an error. Tested with Node v0.11.13.