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