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'use strict'
const fs = require('fs')
const path = require('path')
/*
* Parses a string or buffer into an object
* @param {(string|Buffer)} src - source to be parsed
* @returns {Object} keys and values from src
*/
function parse (src) {
const obj = {}
// convert Buffers before splitting into lines and processing
src.toString().split('\n').forEach(function (line) {
// matching "KEY' and 'VAL' in 'KEY=VAL'
const keyValueArr = line.match(/^\s*([\w\.\-]+)\s*=\s*(.*)?\s*$/)
// matched?
if (keyValueArr != null) {
const key = keyValueArr[1]
// default undefined or missing values to empty string
let value = keyValueArr[2] || ''
// expand newlines in quoted values
const len = value ? value.length : 0
if (len > 0 && value.charAt(0) === '"' && value.charAt(len - 1) === '"') {
value = value.replace(/\\n/gm, '\n')
}
// remove any surrounding quotes and extra spaces
value = value.replace(/(^['"]|['"]$)/g, '').trim()
obj[key] = value
}
})
return obj
}
/*
* Main entry point into dotenv. Allows configuration before loading .env
* @param {Object} options - options for parsing .env file
* @param {string} [options.path=.env] - path to .env file
* @param {string} [options.encoding=utf8] - encoding of .env file
* @returns {Object} parsed object or error
*/
function config (options) {
let dotenvPath = path.resolve(process.cwd(), '.env')
let encoding = 'utf8'
if (options) {
if (options.path) {
dotenvPath = options.path
}
if (options.encoding) {
encoding = options.encoding
}
}
try {
// specifying an encoding returns a string instead of a buffer
const parsed = parse(fs.readFileSync(dotenvPath, { encoding }))
Object.keys(parsed).forEach(function (key) {
if (!process.env.hasOwnProperty(key)) {
process.env[key] = parsed[key]
}
})
return { parsed }
} catch (e) {
return { error: e }
}
}
module.exports.config = config
module.exports.load = config
module.exports.parse = parse
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