gulpfile.mjs

import {deleteSync} from 'del';
import {existsSync, copyFileSync} from 'fs';
import gulp from 'gulp';
import uglify from 'gulp-uglify';
import sassCompiler from 'sass';
import gulpSass from 'gulp-sass';
import ts from 'gulp-typescript';
import through from 'through2';
import path from 'path';

const backupBeforeRemoveDuplicateOrders = new Date(2022, 8, 27).getTime();

const {series, dest, src} = gulp;

const sass = gulpSass(sassCompiler);
const tsProject = ts.createProject("tsconfig.json");

async function clean() {
    return deleteSync('dist/**', {force: true});
}

async function assets() {
    return src('src/assets/**/*', {encoding: false})
        .pipe(dest('dist/assets/'));
}

async function themes() {
    return src('themes/**/*.ejs')
        .pipe(dest('dist/themes/'));
}

async function backupDatabase() {
    if (!existsSync('db/donations.sqlite')) {
        return;
    }
    if (!existsSync(`db/donations.sqlite.${backupBeforeRemoveDuplicateOrders}`)) {
        copyFileSync('db/donations.sqlite', `db/donations.sqlite.${backupBeforeRemoveDuplicateOrders}`)
    }
}

async function themeScripts() {
    return src('themes/**/*.js')
        .pipe(uglify())
        .pipe(dest('dist/assets/js/'));
}

async function themeCss() {
    return src('themes/**/*.scss')
        .pipe(sass({outputStyle: 'compressed'}))
        .pipe(dest('dist/assets/css/'));
}

async function themeAssets() {
    return src('themes/*/images/**/*', {encoding: false})
        .pipe(removeDuplicateImagesPath())
        .pipe(dest('dist/assets/images/'));
}

function removeDuplicateImagesPath() {
    return through.obj(function (file, encoding, callback) {
        file.path = file.path.replace('images' + path.sep, '');
        callback(null, file);
    });
}

async function tsc() {
    return tsProject.src()
        .pipe(tsProject())
        .js.pipe(dest("dist"));
}

export default series(clean, backupDatabase, tsc, themes, assets, themeScripts, themeCss, themeAssets);