create-env.cjs

const crypto = require('crypto');
const fs = require('fs');
const { argv } = require('node:process');
const os = require('os');
const path = require('path');

const strapiEnvPath = path.join(__dirname, 'packages', 'strapi', '.env');
const clientEnvPath = path.join(__dirname, 'packages', 'client', '.env.development.local');

if (fs.existsSync(strapiEnvPath) && fs.existsSync(clientEnvPath)) {
    console.error('The .env files already exist. Please delete them and run the script again.');
} else {
    const modifyEnvFile = (filePath, fieldsToModify) => {
        /* fieldsToModify = [[searchString, wantedValue]], e.g: [['[PORT]', 5000], ['[change-me]', 'randomValue']] */
        const currentValues = fs.readFileSync(filePath).toString().split('\n');
        let modifiedValues = currentValues;
        fieldsToModify.forEach(([searchString, wantedValue]) => {
            modifiedValues = modifiedValues.map((line) =>
                line.includes(searchString) ? line.replaceAll(searchString, wantedValue) : line,
            );
        });
        return modifiedValues.join('\n');
    };

    // taking care of the '.env' file related to the strapi package
    const strapiEnvValues = modifyEnvFile(
        path.join(__dirname, 'packages', 'strapi', '.env.example'),
        [
            ['[change-me]', () => crypto.randomBytes(16).toString('base64')],
            ['[PORT]', argv[2] || 5000],
        ],
    );
    fs.writeFileSync(strapiEnvPath, strapiEnvValues);

    const pkgJson = fs.readFileSync(
        path.join(__dirname, 'packages', 'strapi', 'package.json'),
        'utf8',
    );
    const pkgJsonObject = JSON.parse(pkgJson);
    pkgJsonObject.strapi.uuid = crypto.randomUUID();

    fs.writeFileSync(
        path.join(__dirname, 'packages', 'strapi', 'package.json'),
        JSON.stringify(pkgJsonObject, null, 2) + os.EOL,
    );

    // taking care of the '.env.local' file related to the client package
    const clientEnvValues = modifyEnvFile(
        path.join(__dirname, 'packages', 'client', '.env.example'),
        [['[PORT]', argv[2] || 5000]],
    );
    fs.writeFileSync(clientEnvPath, clientEnvValues);
}