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82 lines
2.9 KiB
JavaScript
82 lines
2.9 KiB
JavaScript
/* eslint-disable @typescript-eslint/ban-ts-comment */
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import {z} from "zod";
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/**
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* Specify your server-side environment variables schema here.
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* This way you can ensure the app isn't built with invalid env vars.
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*/
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const server = z.object({
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NODE_ENV: z.enum(["development", "test", "production"]),
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});
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/**
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* Specify your client-side environment variables schema here.
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* This way you can ensure the app isn't built with invalid env vars.
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* To expose them to the client, prefix them with `NEXT_PUBLIC_`.
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*/
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const client = z.object({
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NEXT_PUBLIC_APP_URL: z.string().transform(url => {
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// Add a HTTPS url prefix automatically, for vercel.
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if (!(url.startsWith("http://") || url.startsWith("https://")))
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return `https://${url}`;
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return url;
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})
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// NEXT_PUBLIC_CLIENTVAR: z.string().min(1),
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});
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/**
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* You can't destruct `process.env` as a regular object in the Next.js
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* edge runtimes (e.g. middlewares) or client-side so we need to destruct manually.
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* @type {Record<keyof z.infer<typeof server> | keyof z.infer<typeof client>, string | undefined>}
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*/
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const processEnv = {
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NODE_ENV: process.env.NODE_ENV,
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NEXT_PUBLIC_APP_URL: process.env.NEXT_PUBLIC_VERCEL_URL ?? process.env.NEXT_PUBLIC_APP_URL
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// NEXT_PUBLIC_CLIENTVAR: process.env.NEXT_PUBLIC_CLIENTVAR,
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};
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// Don't touch the part below
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// --------------------------
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const merged = server.merge(client);
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/** @type z.infer<merged>
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* @ts-ignore - can't type this properly in jsdoc */
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let env = process.env;
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if (!!process.env.SKIP_ENV_VALIDATION == false) {
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const isServer = typeof window === "undefined";
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const parsed = isServer
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? merged.safeParse(processEnv) // on server we can validate all env vars
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: client.safeParse(processEnv); // on client we can only validate the ones that are exposed
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if (parsed.success === false) {
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console.error(
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"❌ Invalid environment variables:",
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parsed.error.flatten().fieldErrors,
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);
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throw new Error("Invalid environment variables");
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}
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/** @type z.infer<merged>
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* @ts-ignore - can't type this properly in jsdoc */
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env = new Proxy(parsed.data, {
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get(target, prop) {
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if (typeof prop !== "string") return undefined;
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// Throw a descriptive error if a server-side env var is accessed on the client
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// Otherwise it would just be returning `undefined` and be annoying to debug
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if (!isServer && !prop.startsWith("NEXT_PUBLIC_"))
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throw new Error(
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process.env.NODE_ENV === "production"
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? "❌ Attempted to access a server-side environment variable on the client"
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: `❌ Attempted to access server-side environment variable '${prop}' on the client`,
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);
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/* @ts-ignore - can't type this properly in jsdoc */
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return target[prop];
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},
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});
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}
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export {env};
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