Component-preload.js generated with comments - gruntjs

Question

I'm working on some performance aspects for my app and, as a consequence, trying to remove the comments from the Component-preload.js file generated when building the app (I'm basically trying to uglify the component-preload)
To do that, I firstly tried to use the "#sap/grunt-sapui5-bestpractice-build" as in its documentation is stated that there's an uglify, but unfortunately it doesn't remove the comments.
Now, I'm working with external plugins to be able to achieve this, but it seems is just "impossible".
This is my gruntfile.js for the moment:
"use strict";
// Initial standard SAP Plugin
grunt.loadNpmTasks("#sap/grunt-sapui5-bestpractice-build");
// Copy plugin configuration
var copyConfig = {
copy: {
main: {
expand: true,
cwd: 'webapp/controller',
src: '**',
dest: 'webapp/aux',
}
}
};
grunt.config.merge(copyConfig);
grunt.loadNpmTasks("grunt-contrib-copy");
// Uglify plugin configuration
var uglifyConfig = {
uglify: {
dist: {
options:{
mangle:false
},
output: {
comments: false
},
files: [{
expand: true,
cwd: 'webapp/controller',
src: '**/*.js',
dest: 'webapp/controller'
}]
}
}
};
grunt.config.merge(uglifyConfig);
grunt.loadNpmTasks("grunt-contrib-uglify");
// Move plugin configuration
var moveConfig = {
move: {
main: {
src: 'webapp/aux/*',
dest: 'webapp/controller/'
}
}
};
grunt.config.merge(moveConfig);
grunt.loadNpmTasks("grunt-move");
// Custom clean plugin configuration
var cleanConfig = {
clean: {
custom: {
src: 'webapp/aux'
}
}
};
grunt.config.merge(cleanConfig);
grunt.loadNpmTasks("grunt-contrib-clean");
grunt.registerTask("default", [
"clean",
"lint",
"copy",
"uglify",
"build",
"move",
"clean:custom"
]);
As you can see, I'm basically:
Copying the sources with comments.
Uglifying the original ones.
Calling the build ( expecting that it uses the uglified sources to generated the Component-preload.js without comments )
Restoring the ones that have comments into the "Controller" folder again.
At this point, I don't know which files is the IDE using to generate the Component-preload.js because I've even tried to do a build with:
Move: Moving the files from the "Controller" folder to an aux one.
Build: Expecting the build to crash or at least, not having any controller in the Component-preload.js
But the result from this test is that Component-preload.js is created and it contains the controller code, so it seems like before starting the whole procedure, the IDE saves a copy of all files.
Could you kindly help me understanding this? Or at least, how can I remove comments from the generated Component-preload.js file??
Thanks in advance and sorry if I haven't explained anything very clear.
Kr,
Pedro.