gulpfile.js

/*!
 * ioBroker gulpfile
 * Date: 2019-01-28
 */
'use strict';

const gulp = require('gulp');
const fs   = require('fs');
const cp   = require('child_process');

function deleteFoldersRecursive(path, exceptions) {
    if (fs.existsSync(path)) {
        const files = fs.readdirSync(path);
        for (const file of files) {
            const curPath = `${path}/${file}`;
            if (exceptions && exceptions.find(e => curPath.endsWith(e))) {
                continue;
            }

            const stat = fs.statSync(curPath);
            if (stat.isDirectory()) {
                deleteFoldersRecursive(curPath);
                fs.rmdirSync(curPath);
            } else {
                fs.unlinkSync(curPath);
            }
        }
    }
}

//TASKS
gulp.task('clean', done => {
    deleteFoldersRecursive('admin', ['admin/s7.png']);
    done();
});

function npmInstall() {
    return new Promise((resolve, reject) => {
        // Install node modules
        const cwd = `${__dirname.replace(/\\/g, '/')}/src/`;

        const cmd = `npm install`;
        console.log(`"${cmd} in ${cwd}`);

        // System call used for update of js-controller itself,
        // because during installation npm packet will be deleted too, but some files must be loaded even during the install process.
        const child = cp.exec(cmd, {cwd});

        child.stderr.pipe(process.stderr);
        child.stdout.pipe(process.stdout);

        child.on('exit', (code /* , signal */) => {
            // code 1 is strange error that cannot be explained. Everything is installed but error :(
            if (code && code !== 1) {
                reject(`Cannot install: ${code}`);
            } else {
                console.log(`"${cmd} in ${cwd} finished.`);
                // command succeeded
                resolve();
            }
        });
    });
}

gulp.task('2-npm', () => {
    if (fs.existsSync(`${__dirname}/src/node_modules`)) {
        return Promise.resolve();
    } else {
        return npmInstall();
    }
});

gulp.task('2-npm-dep', gulp.series('clean', '2-npm'));

function build() {
    return new Promise((resolve, reject) => {
        const options = {
            stdio: 'pipe',
            cwd:   `${__dirname}/src/`,
        };

        const version = JSON.parse(fs.readFileSync(`${__dirname}/package.json`).toString('utf8')).version;
        const data = JSON.parse(fs.readFileSync(`${__dirname}/src/package.json`).toString('utf8'));
        data.version = version;
        fs.writeFileSync(`${__dirname}/src/package.json`, JSON.stringify(data, null, 4));

        console.log(options.cwd);

        let script = `${__dirname}/src/node_modules/react-scripts/scripts/build.js`;
        if (!fs.existsSync(script)) {
            script = `${__dirname}/node_modules/react-scripts/scripts/build.js`;
        }
        if (!fs.existsSync(script)) {
            console.error(`Cannot find execution file: ${script}`);
            reject(`Cannot find execution file: ${script}`);
        } else {
            const child = cp.fork(script, [], options);
            child.stdout.on('data', data => console.log(data.toString()));
            child.stderr.on('data', data => console.log(data.toString()));
            child.on('close', code => {
                console.log(`child process exited with code ${code}`);
                code ? reject(`Exit code: ${code}`) : resolve();
            });
        }
    });
}

gulp.task('3-build', () => build());

gulp.task('3-build-dep', gulp.series('2-npm-dep', '3-build'));

gulp.task('5-copy', () =>
    gulp.src(['src/build/*/**', 'src/build/*'])
        .pipe(gulp.dest('admin/')));

gulp.task('5-copy-dep', gulp.series('3-build-dep', '5-copy'));

gulp.task('6-patch', () => new Promise(resolve => {
    if (fs.existsSync(`${__dirname}/admin/index.html`)) {
        let code = fs.readFileSync(`${__dirname}/admin/index.html`).toString('utf8');
        code = code.replace(/<script>var script=document\.createElement\("script"\)[^<]+<\/script>/,
            `<script type="text/javascript" src="./../../lib/js/socket.io.js"></script>`);

        fs.unlinkSync(`${__dirname}/admin/index.html`);
        fs.writeFileSync(`${__dirname}/admin/index_m.html`, code);
    }
    if (fs.existsSync(`${__dirname}/src/build/index.html`)) {
        let code = fs.readFileSync(`${__dirname}/src/build/index.html`).toString('utf8');
        code = code.replace(/<script>var script=document\.createElement\("script"\)[^<]+<\/script>/,
            `<script type="text/javascript" src="./../../lib/js/socket.io.js"></script>`);

        fs.writeFileSync(`${__dirname}/src/build/index.html`, code);
    }
    resolve();
}));

gulp.task('6-patch-dep',  gulp.series('5-copy-dep', '6-patch'));

gulp.task('default', gulp.series('6-patch-dep'));