chore: fix internal types and expose EnvObject

package.json

@@ -23,7 +23,7 @@
     "prepack": "unbuild",
     "release": "pnpm test && changelogen --release && npm publish && git push --follow-tags",
     "test": "pnpm lint && pnpm typecheck && vitest run --coverage",
-    "typecheck": "vitest typecheck"
+    "typecheck": "tsc --noEmit"
   },
   "devDependencies": {
     "@types/node": "^20.4.9",

src/_utils.ts

@@ -1,3 +1,3 @@
-export function toBoolean(val) {
+export function toBoolean(val: boolean | string | undefined) {
   return val ? val !== "false" : false;
 }

src/env.ts

@@ -1,11 +1,13 @@
 const _envShim = Object.create(null);
 
+export type EnvObject = Record<string, string | undefined>;
+
 const _getEnv = (useShim?: boolean) =>
-  globalThis.__env__ ||
+  (globalThis as unknown as { __env__: EnvObject }).__env__ ||
   globalThis.process?.env ||
   (useShim ? _envShim : globalThis);
 
-export const env = new Proxy<Record<string, string | undefined>>(_envShim, {
+export const env = new Proxy<EnvObject>(_envShim, {
   get(_, prop) {
     const env = _getEnv();
     return env[prop as any] ?? _envShim[prop];

src/process.ts

@@ -1,28 +1,28 @@
-import { env } from "./env";
+import { EnvObject, env } from "./env";
 
 export interface Process
   extends Partial<Omit<typeof globalThis.process, "versions">> {
-  env: Record<string, string | undefined>;
+  env: EnvObject;
   versions: Record<string, string>;
 }
 
 const _process = (globalThis.process ||
   Object.create(null)) as unknown as Process;
 
-const processShims = {
+const processShims: Partial<Process> = {
   versions: {},
 };
 
 export const process = new Proxy<Process>(_process, {
-  get(target, prop) {
+  get(target, prop: keyof Process) {
     if (prop === "env") {
       return env;
     }
     if (prop in target) {
       return target[prop];
     }
     if (prop in processShims) {
-      return processShims[prop as keyof typeof processShims];
+      return processShims[prop];
     }
   },
 });