const fs = require('fs') const path = require('path') const os = require('os') const packageJson = require('../package.json') const version = packageJson.version const LINE = /(?:^|^)\s*(?:export\s+)?([\w.-]+)(?:\s*=\s*?|:\s+?)(\s*'(?:\\'|[^'])*'|\s*"(?:\\"|[^"])*"|\s*`(?:\\`|[^`])*`|[^#\r\n]+)?\s*(?:#.*)?(?:$|$)/mg // Parser src into an Object function parse (src) { const obj = {} // Convert buffer to string let lines = src.toString() // Convert line breaks to same format lines = lines.replace(/\r\n?/mg, '\n') let match while ((match = LINE.exec(lines)) != null) { const key = match[1] // Default undefined or null to empty string let value = (match[2] || '') // Remove whitespace value = value.trim() // Check if double quoted const maybeQuote = value[0] // Remove surrounding quotes value = value.replace(/^(['"`])([\s\S]*)\1$/mg, '$2') // Expand newlines if double quoted if (maybeQuote === '"') { value = value.replace(/\\n/g, '\n') value = value.replace(/\\r/g, '\r') } // Add to object obj[key] = value } return obj } function _log (message) { console.log(`[dotenv@${version}][DEBUG] ${message}`) } function _resolveHome (envPath) { return envPath[0] === '~' ? path.join(os.homedir(), envPath.slice(1)) : envPath } // Populates process.env from .env file function config (options) { let dotenvPath = path.resolve(process.cwd(), '.env') let encoding = 'utf8' const debug = Boolean(options && options.debug) const override = Boolean(options && options.override) if (options) { if (options.path != null) { dotenvPath = _resolveHome(options.path) } if (options.encoding != null) { encoding = options.encoding } } try { // Specifying an encoding returns a string instead of a buffer const parsed = DotenvModule.parse(fs.readFileSync(dotenvPath, { encoding })) Object.keys(parsed).forEach(function (key) { if (!Object.prototype.hasOwnProperty.call(process.env, key)) { process.env[key] = parsed[key] } else { if (override === true) { process.env[key] = parsed[key] } if (debug) { if (override === true) { _log(`"${key}" is already defined in \`process.env\` and WAS overwritten`) } else { _log(`"${key}" is already defined in \`process.env\` and was NOT overwritten`) } } } }) return { parsed } } catch (e) { if (debug) { _log(`Failed to load ${dotenvPath} ${e.message}`) } return { error: e } } } const DotenvModule = { config, parse } module.exports.config = DotenvModule.config module.exports.parse = DotenvModule.parse module.exports = DotenvModule