ci: replace temporary .eslintrc with inline config object

Author: matejchalk

code-pushup.config.ts

@@ -1,7 +1,7 @@
 import nx from '@nx/devkit';
 import 'dotenv/config';
-import type { Linter } from 'eslint';
-import { stat, writeFile } from 'node:fs/promises';
+import type { ESLint } from 'eslint';
+import { stat } from 'node:fs/promises';
 import { z } from 'zod';
 import eslintPlugin from './dist/packages/plugin-eslint';
 import type { CoreConfig } from './packages/models/src';
@@ -17,15 +17,8 @@ const projects = Object.values(
   nx.readProjectsConfigurationFromProjectGraph(graph).projects,
 ).filter(project => 'lint' in (project.targets ?? {}));
 
-// determine plugin parameters
-const eslintrc = 'tmp-eslintrc.json';
-const patterns = projects.flatMap(project => [
-  ...(project.targets?.lint.options.lintFilePatterns ?? []),
-  `${project.sourceRoot}/*.test.ts`, // add test file glob to load vitest rules
-]);
-
 // create single ESLint config with project-specific overrides
-const eslintConfig: Linter.Config = {
+const eslintConfig: ESLint.ConfigData = {
   root: true,
   overrides: await Promise.all(
     projects.map(async project => ({
@@ -36,7 +29,11 @@ const eslintConfig: Linter.Config = {
     })),
   ),
 };
-await writeFile(eslintrc, JSON.stringify(eslintConfig, null, 2));
+// include patterns from each project
+const patterns = projects.flatMap(project => [
+  ...(project.targets?.lint.options.lintFilePatterns ?? []),
+  `${project.sourceRoot}/*.test.ts`, // hack: add test file glob to load vitest rules
+]);
 
 // load upload configuration from environment
 const envSchema = z.object({
@@ -61,7 +58,7 @@ const config: CoreConfig = {
     project: env.CP_PROJECT,
   },
 
-  plugins: [await eslintPlugin({ eslintrc, patterns })],
+  plugins: [await eslintPlugin({ eslintrc: eslintConfig, patterns })],
 
   categories: [
     {