✏️ Editing: buildScripts.js Writable

const path = require( 'path' );
const { src, dest, series } = require( 'gulp' );
const plumber = require( 'gulp-plumber' );
const sourcemaps = require( 'gulp-sourcemaps' );
const uglify = require( 'gulp-uglify' );
const concat = require( 'gulp-concat' );
const mode = require( 'gulp-mode' )();
const buildConfig = require( '../build-config.json' );
const rename = require( 'gulp-rename' );
const fs = require( 'fs' );

function errorHandler ( err ) {
	console.error( err );
	this.emit( 'end' ); // Continue the task stream
}

return series.apply( null, jsTasks );
}

function buildModuleJsFiles ( done ) {
	buildJs( done,
		buildConfig.modules.moduleUglifyList,
		buildConfig.modules.srcPath,
		buildConfig.modules.srcPath
	);
}

function buildModuleJsMainFile ( done ) {
	buildJs(
		done,
		buildConfig.modulesMainFile.modulesMainFileUglifyList,
		buildConfig.modulesMainFile.srcPath,
		buildConfig.modulesMainFile.destPath
	);
}

/**
 * Recursively processes all JavaScript files within a given directory and its subdirectories.
 * @param {string} directoryPath - The path of the directory to be processed.
 * @param {function} done - Callback function to be called when processing is complete.
 */
function processJsFilesInDirectory ( directoryPath, done ) {
	fs.readdir( directoryPath, ( err, files ) => {
		if ( err ) {
			console.error( 'Error:', err );
			return done( err );
		}

let pending = files.length;

if ( pending === 0 ) {
			return done(); // If no files, signal completion immediately
		}

files.forEach( ( file ) => {
			const filePath = path.join( directoryPath, file );
			fs.stat( filePath, ( err, stats ) => {
				if ( err ) {
					console.error( 'Error:', err );
					done( err );
					return;
				}

if ( stats.isDirectory() ) {
					// If the current item is a directory, recursively process it
					processJsFilesInDirectory( filePath, ( err ) => {
						if ( --pending === 0 ) { done( err ); } // Call done only when all recursive calls are done
					});
				} else if ( path.extname( file ) === '.js' && !file.endsWith( '.min.js' ) ) {
					processJsFile( filePath, () => {
						if ( --pending === 0 ) {
							done();
						}
					});
				} else {
					if ( --pending === 0 ) { done(); } // Call done if no further processing is needed
				}
			});
		});
	});
}

/**
 * Minifies a single JavaScript file and outputs the minified file to the same folder.
 * @param {string} filePath - The path of the JavaScript file to be processed.
 * @param {function} done - Callback function to be called when processing is complete.
 */
function processJsFile ( filePath, done ) {
	const destPath = path.dirname( filePath );
	const fileNameWithoutExtension = path.basename( filePath, '.js' );
	const destFileName = fileNameWithoutExtension + '.min.js';

src( filePath )
		.pipe( plumber( errorHandler ) )
		.pipe( mode.development( sourcemaps.init() ) )
		.pipe( mode.production( uglify() ) )
		.pipe( mode.development( sourcemaps.write() ) )
		.pipe( rename( destFileName ) )
		.pipe( dest( destPath ) )
		.on( 'end', done );
}

function buildJsLibs ( done ) {
	const srcPath = buildConfig.globalOptions.jsLibs.srcPath;
	processJsFilesInDirectory( srcPath, done );
}

module.exports = {
	buildJs,
	buildJsPackages,
	buildModuleJsFiles,
	buildModuleJsMainFile,
	buildJsLibs
};

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