refactor(plugin): import package.json file directly

Author: Zamiell

package-metadata.json

@@ -1,5 +1,10 @@
 {
+  "@schema": "https://raw.githubusercontent.com/complete-ts/complete/refs/heads/main/packages/complete-cli/schemas/package-metadata-schema.json",
   "dependencies": {
+    "figlet": {
+      "lock-version": true,
+      "lock-reason": "https://github.com/patorjk/figlet.js/issues/139"
+    },
     "typescript": {
       "lock-version": true,
       "lock-reason": "https://github.com/TypeScriptToLua/TypeScriptToLua/blob/master/package.json#L45"

packages/eslint-plugin-isaacscript/package.json

@@ -30,7 +30,7 @@
   "license": "MIT",
   "author": "Zamiell",
   "type": "module",
-  "main": "./dist/index.js",
+  "main": "./dist/src/index.js",
   "files": [
     "dist",
     "LICENSE",

packages/eslint-plugin-isaacscript/src/index.ts

@@ -1,11 +1,10 @@
 import type { TSESLint } from "@typescript-eslint/utils";
 import type { ReadonlyRecord } from "complete-common";
-import fs from "node:fs";
-import path from "node:path";
+import packageJSON from "../package.json" with { type: "json" };
 import { configs } from "./configs.js";
 import { rules } from "./rules.js";
 
-const { name, version } = getPackageJSON();
+const { name, version } = packageJSON;
 
 const plugin = {
   meta: {
@@ -22,20 +21,6 @@ addPluginToConfigs(configs, name);
 // eslint-disable-next-line
 export default plugin;
 
-/**
- * We parse the package JSON manually since importing JSON files directly in Node is experimental.
- */
-function getPackageJSON(): Record<string, unknown> {
-  const packageRoot = path.resolve(import.meta.dirname, "..");
-  const packageJSONPath = path.join(packageRoot, "package.json");
-  try {
-    const packageJSONString = fs.readFileSync(packageJSONPath, "utf8");
-    return JSON.parse(packageJSONString) as Record<string, unknown>;
-  } catch (error) {
-    throw new Error(`Failed to read the "${packageJSONPath}" file: ${error}`);
-  }
-}
-
 /** @see https://eslint.org/docs/latest/extend/plugins#configs-in-plugins */
 function addPluginToConfigs(
   configsToMutate: ReadonlyRecord<string, TSESLint.FlatConfig.ConfigArray>,

packages/eslint-plugin-isaacscript/tsconfig.json

@@ -12,7 +12,13 @@
   // https://www.typescriptlang.org/docs/handbook/compiler-options.html
   "compilerOptions": {
     // Needed since this is a library.
+    "sourceMap": true,
     "declaration": true,
     "declarationMap": true,
+
+    // Needed since we import from the "package.json" file.
+    // TODO: Remove this when the monorepo version of TypeScript is: >= 5.9.2
+    // (It automatically gets applied for some reason on newer TypeScript versions.)
+    "resolveJsonModule": true,
   },
 }