dotenvExpand.ts•3.17 kB
import type { DotenvConfigOutput } from 'dotenv'
/**
* Modified version of https://github.com/motdotla/dotenv-expand
* Our version does only expand ${ENV} - curly braces but not without curly braces
*
* Original License from https://github.com/motdotla/dotenv-expand/blob/de9e5cb0215495452f475f5be4dea1580b8217cd/LICENSE
* Copyright (c) 2016, Scott Motte
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
export function dotenvExpand(config: DotenvConfigOutput & { ignoreProcessEnv?: boolean }) {
// if ignoring process.env, use a blank object
const environment = config.ignoreProcessEnv ? {} : process.env
const interpolate = (envValue: string) => {
const matches = envValue.match(/(.?\${(?:[a-zA-Z0-9_]+)?})/g)
return (
matches?.reduce(function (newEnv, match) {
const parts = /(.?)\${([a-zA-Z0-9_]+)?}/g.exec(match)
if (!parts) {
return newEnv
}
const prefix = parts[1]
let value, replacePart
if (prefix === '\\') {
replacePart = parts[0]
value = replacePart.replace('\\$', '$')
} else {
const key = parts[2]
replacePart = parts[0].substring(prefix.length)
// process.env value 'wins' over .env file's value
value = Object.hasOwnProperty.call(environment, key) ? environment[key] : config.parsed![key] || ''
// Resolve recursive interpolations
value = interpolate(value)
}
return newEnv.replace(replacePart, value)
}, envValue) ?? envValue
)
}
for (const configKey in config.parsed) {
const value = Object.hasOwnProperty.call(environment, configKey) ? environment[configKey] : config.parsed[configKey]
config.parsed[configKey] = interpolate(value!)
}
for (const processKey in config.parsed) {
environment[processKey] = config.parsed[processKey]
}
return config
}