chore: upgrade ESLint and TypeScript tooling

Upgrade the root development tooling:

- eslint to 10.3.0
- typescript to 6.0.3
- typescript-eslint and @typescript-eslint/rule-tester to 8.59.3
- eslint-config-prettier to 10.1.8
- eslint-plugin-prettier to 5.5.5
- eslint-plugin-unused-imports to 4.4.1
- @types/eslint to 9.6.1
- @types/estree to 1.0.9
- @types/node to 24.12.4

Refresh yarn.lock for the updated dependency graph.

Compatibility changes:

- Allow ESLint 10 in @softarc/eslint-plugin-sheriff peer dependencies.
- Add TypeScript 6 deprecation acknowledgement in tsconfig.base.json.
- Replace Array.prototype.at() usage in library code so the current es2017 lib still type-checks.
- Update ESLint rule context access to use current ESLint 10 properties instead of removed/deprecated methods.

Verification performed:

- yarn lint:all passed.
- ./node_modules/.bin/tsc -p packages/core/tsconfig.lib.json --noEmit passed.
- ./node_modules/.bin/tsc -p packages/eslint-plugin/tsconfig.lib.json --noEmit passed.
- yarn vitest --run passed: 43 files, 347 passed, 2 skipped.

Known remaining environment/test notes:

- yarn test:ci still fails in the full integration specs because built package resolution cannot find @softarc/sheriff-core.
- yarn build:all could not complete in the Codex sandbox because Nx project graph/daemon handling failed around Unix socket/plugin-worker startup.
- Direct TypeScript package checks passed, so the dependency migration itself is type-safe in this workspace.

Session context for resuming:

This was done after checking current npm registry metadata for ESLint, TypeScript, and typescript-eslint. The compatible path identified was ESLint 10.3.0, TypeScript 6.0.3, and typescript-eslint 8.59.3, whose peer ranges include ESLint 10 and TypeScript >=4.8.4 <6.1.0.

Author: rainerhahnekamp

package.json

@@ -25,21 +25,21 @@
     "@commitlint/prompt-cli": "^19.3.1",
     "@nx/js": "20.0.7",
     "@nx/workspace": "20.0.7",
-    "@types/eslint": "^8.4.6",
-    "@types/estree": "^1.0.0",
-    "@types/node": "18.19.14",
-    "@typescript-eslint/rule-tester": "^8.5.0",
+    "@types/eslint": "^9.6.1",
+    "@types/estree": "^1.0.9",
+    "@types/node": "24.12.4",
+    "@typescript-eslint/rule-tester": "^8.59.3",
     "@vitest/coverage-v8": "^2.0.3",
-    "eslint": "^9.6.0",
-    "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-prettier": "^5.1.3",
-    "eslint-plugin-unused-imports": "^4.0.0",
+    "eslint": "^10.3.0",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-prettier": "^5.5.5",
+    "eslint-plugin-unused-imports": "^4.4.1",
     "husky": "^9.0.11",
     "nx": "20.0.7",
     "prettier": "^3.2.5",
     "ts-node": "10.9.1",
-    "typescript": "5.5.3",
-    "typescript-eslint": "^8.5.0",
+    "typescript": "6.0.3",
+    "typescript-eslint": "^8.59.3",
     "vitest": "^2.0.3"
   }
 }

packages/core/src/lib/fs/virtual-fs.ts

@@ -215,7 +215,7 @@ export class VirtualFs extends Fs {
       exists: true,
       node,
       parent: node.parent,
-      nodeName: paths.at(-1) ?? '',
+      nodeName: paths[paths.length - 1] ?? '',
     };
   };
 

packages/core/src/lib/modules/create-modules.ts

@@ -61,8 +61,7 @@ function findClosestModulePath(path: string, modulePaths: FsPath[]) {
   return throwIfNull(
     modulePaths
       .filter((modulePath) => path.startsWith(modulePath))
-      .sort((p1, p2) => (p1.length > p2.length ? -1 : 1))
-      .at(0),
+      .sort((p1, p2) => (p1.length > p2.length ? -1 : 1))[0],
     `findClosestModule for ${path}`,
   );
 }

packages/eslint-plugin/package.json

@@ -16,7 +16,7 @@
   "dependencies": {},
   "peerDependencies": {
     "@softarc/sheriff-core": "0.19.6",
-    "eslint": "^8.0.0 || ^9.0.0",
+    "eslint": "^8.0.0 || ^9.0.0 || ^10.0.0",
     "@typescript-eslint/utils": "^5.48.2 || ^6.0.0 || ^7.0.0 || ^8.0.0-alpha.20"
   }
-}
+}

packages/eslint-plugin/src/lib/rules/create-rule.ts

@@ -1,5 +1,5 @@
 import { Rule } from 'eslint';
-import {Executor, ExecutorNode} from './executor';
+import { Executor, ExecutorNode } from './executor';
 import { UserError } from '@softarc/sheriff-core';
 
 /**
@@ -20,12 +20,9 @@ export const createRule: (
   create: (context) => {
     let isFirstRun = true;
     let hasInternalError = false;
-    const executeRuleWithContext = (
-      node: ExecutorNode,
-    ) => {
-      const filename = context.filename ?? context.getFilename();
-      const sourceCode =
-        context.sourceCode?.text ?? context.getSourceCode().text;
+    const executeRuleWithContext = (node: ExecutorNode) => {
+      const filename = context.filename;
+      const sourceCode = context.sourceCode.text;
 
       if (!hasInternalError) {
         try {

tsconfig.base.json

@@ -5,6 +5,7 @@
     "sourceMap": true,
     "declaration": false,
     "moduleResolution": "node",
+    "ignoreDeprecations": "6.0",
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "importHelpers": false,