gulpfile.js

/* eslint-env node */
const path = require('path');

const utils = require('@gravity-ui/gulp-utils');
const {task, src, dest, series, parallel} = require('gulp');
const replace = require('gulp-replace');
const sass = require('gulp-sass')(require('sass'));
const sourcemaps = require('gulp-sourcemaps');
const {rimrafSync} = require('rimraf');
const BUILD_CLIENT_DIR = path.resolve('build');
const ESM_DIR = 'esm';
const CJS_DIR = 'cjs';

task('clean', (done) => {
    rimrafSync(BUILD_CLIENT_DIR);
    rimrafSync('styles/**/*.css', {glob: true});
    done();
});

async function compileTs(modules = false) {
    const tsProject = await utils.createTypescriptProject({
        compilerOptions: {
            declaration: true,
            module: modules ? 'esnext' : 'nodenext',
            moduleResolution: modules ? 'bundler' : 'nodenext',
            ...(modules ? undefined : {verbatimModuleSyntax: false}),
        },
    });

    const transformers = [
        tsProject.customTransformers.transformScssImports,
        tsProject.customTransformers.transformLocalModules,
    ];
    return new Promise((resolve) => {
        src([
            'src/**/*.{ts,tsx}',
            '!src/stories/**/*',
            '!src/**/__stories__/**/*',
            '!src/**/__tests__/**/*',
            '!src/server.ts',
            '!src/configure.ts',
            '!src/widget/**/*',
            '!test-utils/**/*',
        ])
            .pipe(
                replace(/import '.+\.scss';/g, (match) =>
                    modules ? match.replace('.scss', '.css') : '',
                ),
            )
            .pipe(sourcemaps.init())
            .pipe(
                tsProject({
                    customTransformers: {
                        before: transformers,
                        afterDeclarations: transformers,
                    },
                }),
            )
            .pipe(replace(/swiper/, () => (modules ? 'swiper/swiper.esm.js' : 'swiper')))
            .pipe(
                replace(/swiper\/react/g, () =>
                    modules ? 'swiper/swiper-react.esm.js' : 'swiper/swiper-react.cjs.js',
                ),
            )
            .pipe(sourcemaps.write('.', {includeContent: true, sourceRoot: '../../src'}))
            .pipe(
                utils.addVirtualFile({
                    fileName: 'package.json',
                    text: JSON.stringify({type: modules ? 'module' : 'commonjs'}),
                }),
            )
            .pipe(dest(path.resolve(BUILD_CLIENT_DIR, modules ? 'esm' : 'cjs')))
            .on('end', resolve);
    });
}

task('compile-to-esm', () => {
    return compileTs(true);
});

task('compile-to-cjs', () => {
    return compileTs();
});

task('copy-js-declarations', () => {
    return src([
        'src/**/*.d.ts',
        '!src/stories/**/*.d.ts',
        '!src/**/__stories__/**/*.d.ts',
        '!src/**/__tests__/**/*.d.ts',
        '!test-utils/**/*.d.ts',
        '!src/widget/**/*',
    ])
        .pipe(dest(path.resolve(BUILD_CLIENT_DIR, ESM_DIR)))
        .pipe(dest(path.resolve(BUILD_CLIENT_DIR, CJS_DIR)));
});

task('copy-json', () => {
    return src(['src/**/i18n/*.json', `src/**/templates/*.json`])
        .pipe(dest(path.resolve(BUILD_CLIENT_DIR, ESM_DIR)))
        .pipe(dest(path.resolve(BUILD_CLIENT_DIR, CJS_DIR)));
});

task('styles-global', () => {
    return src('styles/styles.scss')
        .pipe(
            sass
                .sync({
                    loadPaths: ['node_modules'],
                })
                .on('error', sass.logError),
        )
        .pipe(dest('styles'));
});

task('styles-components', () => {
    return src([`src/**/*.scss`, `!src/**/__stories__/**/*.scss`, '!src/widget/**/*.scss'])
        .pipe(
            sass.sync({loadPaths: ['node_modules']}).on('error', function (error) {
                sass.logError.call(this, error);
                process.exit(1);
            }),
        )
        .pipe(dest(path.resolve(BUILD_CLIENT_DIR, ESM_DIR)))
        .pipe(dest(path.resolve(BUILD_CLIENT_DIR, CJS_DIR)));
});

task(
    'build',
    series([
        'clean',
        parallel(['compile-to-esm', 'compile-to-cjs']),
        'copy-js-declarations',
        'copy-json',
        parallel(['styles-global', 'styles-components']),
    ]),
);

task('default', series(['build']));