Cannot 'concat' at the beginning

[danilo-valente]

If I have something like this:

js: {
    tasks: ['concat', uglify()]
}

It emits a write after end error.

[futurechan]

It seems to be working for me. What versions of uglify and gulp are you using? Can you give me a bit more of your gulp config and .js files?

[danilo-valente]

Sure, here's what I was trying to do:

gulp.task('build', function () {
    return gulp.src('src/index.html')
        .pipe(assetTransform({
            js: {
                tasks: ['concat', uglify()]
            }
        }))
        .pipe(gulp.dest('dist'));
});

I tried the code above on my bower dependencies, so my index.html is something like this:

<!-- at:js >> scripts/vendor.js -->
<script src="bower_components/modernizr/modernizr.js"></script>
<script src="bower_components/jquery/jquery.js"></script>
<!-- at:end -->

I ran this code on Ubuntu, with gulp@3.8.10, gulp-uglify@1.0.2 and uglify@2.4.15. The weird thing is that I ran this same code on a Mac OS X with gulp-uglify@1.0.2 and it worked. I can't remember the exact gulp version, but it was ^3.8.10.

[futurechan]

Does flipping 'concat' and uglify fix the problem? Also, you could try the stream function option:

gulp.task('build', function () {
    return gulp.src('src/index.html')
        .pipe(assetTransform({
            js: {
                stream:function(filestream, outputFilename){
                    return filestream
                        .pipe(concat(outputFilename)); //concat is gulp-concat
                        .pipe(uglify());
                }
            }
        }))
        .pipe(gulp.dest('dist'));
});

[danilo-valente]

Flipping worked, but I needed uglify to be run before 'concat'. I just tested with 'stream' and it worked too, thanks.

[danilo-valente]

I don't have the original code anymore, then I can't reproduce the error, but it seems that it's not related to gulp-asset-transform. Therefore, I'm closing this issue. Anyway, thanks for your help.