Gulp JS task outputting NodeError: Callback called multiple times

Gulp JS task outputting NodeError: Callback called multiple times

I have five Gulp JS tasks, one of these tasks called js_bundle is giving me an error. The error is as follows:

NodeError: Callback function called multiple times

Here is my gulpfile.js:

const { src, dest, parallel , series , watch } = require('gulp');

const sass = require('gulp-sass')(require('sass'));
const fileinclude = require('gulp-file-include');
const sourcemaps = require('gulp-sourcemaps');
const uglify = require('gulp-uglify');
const minify = require('gulp-minifier');
const strip = require('gulp-strip-comments');
const rtlcss = require('gulp-rtlcss');
const rename = require('gulp-rename');

// sass.compiler = require('node-sass'); // no-need for gulp-sass v5+

var node_path = '../../../';


function html(cb) {
  src('html/src/**')
  .pipe(dest('html/dist/'));

  cb();
}

function scss(cb) {
  src(['scss/*.scss'])
  // .pipe(sourcemaps.init())               // If you want generate source map.
  .pipe(sass().on('error', sass.logError))  // uses {outputStyle: 'compressed'} in saas() for minify css
  // .pipe(sourcemaps.write('./'))          // If you want generate source map.
  .pipe(dest('assets/dist/css'));

  src(['scss/*.scss', '!scss/style-email.scss'])
  // .pipe(sourcemaps.init())               // If you want generate source map.
  .pipe(sass().on('error', sass.logError))  // uses {outputStyle: 'compressed'} in saas() for minify css
  // .pipe(sourcemaps.write('./'))          // If you want generate source map.
  .pipe(rtlcss())
  .pipe(rename({ suffix: '.rtl' }))
  .pipe(dest('assets/dist/css'));

  // EDITORS
  src(['scss/editors/*.scss'])
  // .pipe(sourcemaps.init())                                           // If you want generate source map.
  .pipe(sass({outputStyle: 'compressed'}).on('error', sass.logError))   // remove {outputStyle: 'compressed'} from saas() if do not want to minify css
  // .pipe(sourcemaps.write('./'))                                      // If you want generate source map.
  .pipe(dest('assets/dist/css/editors'));

  src(['scss/editors/*.scss'])
  // .pipe(sourcemaps.init())                                           // If you want generate source map.
  .pipe(sass({outputStyle: 'compressed'}).on('error', sass.logError))   // remove {outputStyle: 'compressed'} from saas() if do not want to minify css
  // .pipe(sourcemaps.write('./'))                                      // If you want generate source map.
  .pipe(rtlcss())
  .pipe(rename({ suffix: '.rtl' }))
  .pipe(dest('assets/dist/css/editors'));

  src(['scss/libs/*.scss'])
  // .pipe(sourcemaps.init())                                           // If you want generate source map.
  .pipe(sass({outputStyle: 'compressed'}).on('error', sass.logError))   // remove {outputStyle: 'compressed'} from saas() if do not want to minify css
  // .pipe(sourcemaps.write('./'))                                      // If you want generate source map.
  .pipe(dest('assets/dist/css/libs'));

  // SKINS
  src(['scss/skins/*.scss'])
  // .pipe(sourcemaps.init())               // If you want generate source map.
  .pipe(sass().on('error', sass.logError))  // uses {outputStyle: 'compressed'} in saas() for minify css
  // .pipe(sourcemaps.write('./'))          // If you want generate source map.
  .pipe(dest('assets/dist/css/skins'));

  cb();
}

function js_scripts(cb) {
  src(['assets/src/js/*.js','!assets/src/js/bundle.js'])
  // .pipe(uglify())                        // If you minify the code.
  .pipe(dest('assets/dist/js'));

  src(['assets/src/js/charts/*.js'])
  .pipe(uglify())                        // If you minify the code.
  .pipe(dest('assets/dist/js/charts'));

  src(['assets/src/js/apps/*.js'])
  // .pipe(uglify())                        // If you minify the code.
  .pipe(dest('assets/dist/js/apps'));

  cb();
}

/* The task giving me the error */
function js_bundle(cb) {
  src('assets/src/js/bundle.js')
  .pipe(fileinclude({
    prefix: '@@',
    basepath: '@file',
    context: { build: 'dist', nodeRoot: node_path }
  }))
  .pipe(strip())
  .pipe(minify({ minify: true, minifyJS: { sourceMap: false } }))     // Disable, if you dont want to minify bundle file.
  .pipe(dest('assets/dist/js'));

  src(['assets/src/js/libs/**', '!assets/src/js/libs/editors/skins/**'])
  .pipe(fileinclude({
    prefix: '@@',
    basepath: '@file',
    context: { build: 'dist', nodeRoot: node_path }
  }))
  .pipe(strip())
  .pipe(minify({ minify: true, minifyJS: { sourceMap: false } }))     // Disable, if you dont want to minify bundle file.
  .pipe(dest('assets/dist/js/libs'));

  src('assets/src/js/libs/editors/skins/**').pipe(dest('assets/dist/js/libs/editors/skins'));

  cb();
}

function assets(cb){
  src(['assets/src/**', '!assets/src/js/**', '!assets/src/css/**'])
  .pipe(dest('assets/dist/'));

  cb();
}

exports.build = series(html, scss, js_scripts, /* The task giving me the error */ js_bundle, assets);

exports.develop = function() {
    watch(['scss/*.scss','scss/**'], scss)
    watch(['html/src/*.html','html/src/**/*.html'], html)
    watch(['assets/src/**'], assets)
    watch(['assets/src/js/*.js','assets/src/js/charts/*.js', 'assets/src/js/apps/*.js', '!assets/src/js/bundle.js'], js_scripts)
    watch(['assets/src/js/libs/**','assets/src/js/bundle.js'], js_bundle)
};

Here is the code snippet causing the error:

.pipe(fileinclude({
    prefix: '@@',
    basepath: '@file',
    context: { build: 'dist', nodeRoot: node_path }
}))

I tried the following:

• Updated the gulp_file_include plugin to the latest version which I suspect is causing the error.
• Console logged the functions before and after to check if the callback function is repeating but to no avail.
• Removed the strip and minify functions but still got the error which confirms my doubt that the gulp_file_include plugin is causing the error.
• Checked this SO question How to fix callback function called multiple times but I did not have the gulp-imagemin plugin which the author of the question had said was causing the problem

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BRIEF DUMMY PROJECT STRUCTURE

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Any help is appreciated thanks, Ciao

from Gulp JS task outputting NodeError: Callback called multiple times