Gulp - Nicely Commented Less Import from a folder

gulpfile.js

var gulp = require('gulp');
var less = require('gulp-less');
var lessImport=require('less-imports.js');


gulp.task('less_parts', function() {
    gulp.src("src/less/parts/*.less")
    .pipe(lessImport('style.css'))
    .pipe(less())
    .pipe(gulp.dest("./"));
});


gulp.task('default', ['less_parts']);

less-imports.js

var through = require('through2');
var fs = require('fs');
var path = require('path');
var gutil = require('gulp-util');
var PluginError = gutil.PluginError;
var File = gutil.File;
module.exports = function(dest, option) {
    option = option || {};
    if (typeof option.newLine !== 'string') {
        option.newLine = gutil.linefeed;
    }
    var LessContent;
    var latestFile = false;
    var lessPath;
    var config = JSON.parse(fs.readFileSync('src/config.json'));
    var setting = config.theme
    var header = [];
    var less_content = [];
    var legends = "";
    var options = {
        "Theme Name": setting.title,
        "Author": setting.author,
        "Author URI": setting.authorUrl,
        "Version": setting.version,
        "License": setting.license,
        "License URI": setting.licenseUrl,
        "Description": setting.description,
        "Text Domain": setting.textdomain,
    };
    header.push("/*");
    for (var obj in options) {
        header.push(obj + ": " + options[obj]);
    }
    header.push("*/");
    header.push("");
    header.push("/*  ==========================================");
    header.push("\tTABLE OF CONTENTS");
    header.push("    ==========================================");
    header.push(" ");
    var prepareFiles = function(file, encoding, callback) {
        if (file.isNull()) {
            callback();
            return;
        }
        if (file.isStream()) {
            callback();
            return;
        }
        var filename = file.relative;
        var nameonly = filename;
        nameonly = nameonly.replace(/_/g, " ");
        nameonly = nameonly.replace("-", ". ");
        nameonly = nameonly.toUpperCase();
        if (filename.substring(0, 1) != "_") {
            header.push("\t" + nameonly);
            less_content.push("/*  ==========================================");
            less_content.push("\t");
            less_content.push(nameonly);
            less_content.push("    ========================================== */");
        }
        less_content.push('@import "' + file.path + '";');
        latestFile = file;
        callback();
    };
    var endStream = function(callback) {
        if (!latestFile && less_content.length < 1) {
            callback();
            return;
        }
        var finalFile;
        if (typeof dest === 'string') {
            LessContent = header.join(option.newLine) + option.newLine + less_content.join(option.newLine);
            var content = new Buffer(LessContent);
        } else {
            finalFile = new File(dest);
            finalFile.contents = content;
        }
        finalFile = latestFile.clone({
            contents: false
        });
        finalFile.path = path.join(latestFile.base, dest);
        finalFile.contents = content;
        this.push(finalFile);
        callback();
    }
    return through.obj(prepareFiles, endStream);
};