envalid
Version:
Validation for your environment variables
74 lines • 3.69 kB
JavaScript
;
exports.__esModule = true;
exports.applyDefaultMiddleware = exports.accessorMiddleware = exports.strictProxyMiddleware = void 0;
var strictProxyMiddleware = function (envObj, rawEnv) {
var inspectables = [
'length',
'inspect',
'hasOwnProperty',
'toJSON',
Symbol.toStringTag,
Symbol.iterator,
// For jest
'asymmetricMatch',
'nodeType',
// For react-refresh, see #150
'$$typeof',
// For libs that use `then` checks to see if objects are Promises (see #74):
'then',
// For usage with TypeScript esModuleInterop flag
'__esModule',
];
var inspectSymbolStrings = ['Symbol(util.inspect.custom)', 'Symbol(nodejs.util.inspect.custom)'];
return new Proxy(envObj, {
get: function (target, name) {
var _a;
// These checks are needed because calling console.log on a
// proxy that throws crashes the entire process. This permits access on
// the necessary properties for `console.log(envObj)`, `envObj.length`,
// `envObj.hasOwnProperty('string')` to work.
if (inspectables.includes(name) || inspectSymbolStrings.includes(name.toString())) {
// @ts-expect-error TS doesn't like symbol types as indexers
return target[name];
}
var varExists = target.hasOwnProperty(name);
if (!varExists) {
if (typeof rawEnv === 'object' && ((_a = rawEnv === null || rawEnv === void 0 ? void 0 : rawEnv.hasOwnProperty) === null || _a === void 0 ? void 0 : _a.call(rawEnv, name))) {
throw new ReferenceError("[envalid] Env var " + name + " was accessed but not validated. This var is set in the environment; please add an envalid validator for it.");
}
throw new ReferenceError("[envalid] Env var not found: " + name);
}
return target[name];
},
set: function (_target, name) {
throw new TypeError("[envalid] Attempt to mutate environment value: " + name);
}
});
};
exports.strictProxyMiddleware = strictProxyMiddleware;
var accessorMiddleware = function (envObj, rawEnv) {
// Attach is{Prod/Dev/Test} properties for more readable NODE_ENV checks
// Note that isDev and isProd are just aliases to isDevelopment and isProduction
// @ts-ignore attempt to read NODE_ENV even if it's not in the spec
var computedNodeEnv = envObj.NODE_ENV || rawEnv.NODE_ENV;
// If NODE_ENV is not set, assume production
var isProd = !computedNodeEnv || computedNodeEnv === 'production';
Object.defineProperties(envObj, {
isDevelopment: { value: computedNodeEnv === 'development' },
isDev: { value: computedNodeEnv === 'development' },
isProduction: { value: isProd },
isProd: { value: isProd },
isTest: { value: computedNodeEnv === 'test' }
});
return envObj;
};
exports.accessorMiddleware = accessorMiddleware;
var applyDefaultMiddleware = function (cleanedEnv, rawEnv) {
// Note: Ideally we would declare the default middlewares in an array and apply them in series with
// a generic pipe() function. However, a generically typed variadic pipe() appears to not be possible
// in TypeScript as of 4.x, so we just manually apply them below. See
// https://github.com/microsoft/TypeScript/pull/39094#issuecomment-647042984
return exports.strictProxyMiddleware(exports.accessorMiddleware(cleanedEnv, rawEnv), rawEnv);
};
exports.applyDefaultMiddleware = applyDefaultMiddleware;
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