Watchify breaks error handling

[Liero]

With browserify this works:

bundler.bundle()
    .pipe(source(bundleFileName))
    .pipe(buffer())
    .pipe(sourcemaps.init({loadMaps: true}))
        // Add transformation tasks to the pipeline here.
        .pipe(uglify())
        .on('error', gutil.log)
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(dest + '/scripts'));

but when I includude wachify plugin, the error callbacks are not called.

bundler.plugin(watchify);

I believe this is an unexpected behavior.

Current workaround is to include on('error', ..) directly afrer bundler.bundle()

bundler.bundle()
    .on('error', gutil.log)
    .pipe(source(bundleFileName))
    .pipe(buffer())
    .pipe(sourcemaps.init({loadMaps: true}))
        // Add transformation tasks to the pipeline here.
        .pipe(uglify())
        .on('error', gutil.log)
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(dest + '/scripts'));

[menzow]

Within the scope of watchify this behaviour is not unexpected. The issue is that you don't handle events and that node does not forward error events.

You can find a great explanation here: https://stackoverflow.com/questions/21771220/error-handling-with-node-js-streams?answertab=votes#tab-top

This behaviour was also explained in this browserify issue: https://github.com/browserify/browserify/issues/1487#issuecomment-173357516