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import type { EnvVars, RestoreOriginalFunction } from './types'
/**
* Proxy the environment to track environment variables keys that
* are accessed during the build.
*
* @param envVars A set to track environment variable keys that are accessed.
* @returns A function that restores the original environment.
*/
export function envProxy(envVars: EnvVars): RestoreOriginalFunction {
const newEnv = new Proxy(process.env, {
get: (target, key, receiver) => {
envVars.add(key)
return Reflect.get(target, key, receiver)
},
set: (target, key, value) => {
return Reflect.set(target, key, value)
},
})
const oldEnv = process.env
process.env = newEnv
// Return a function that restores the original environment.
return () => {
process.env = oldEnv
}
}
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