feat: add new utility functions, tests and update project settings

.editorconfig

@@ -0,0 +1,6 @@
+[Makefile]
+indent_style = tab
+
+[*.js]
+indent_style = space
+indent_size = 2

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '23.x'
+
+      - name: Install dependencies
+        run: make install
+
+      - name: Run tests
+        run: make test
+
+      - name: Run linter
+        run: make lint
+
+      - name: Test & publish code coverage
+        uses: paambaati/[email protected]
+        env:
+          CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+        with:
+          coverageCommand: make test-coverage
+          debug: true

.gitignore

@@ -1 +1,2 @@
 node_modules
+coverage

.npmrc

@@ -0,0 +1,3 @@
+node-options=--no-warnings --experimental-vm-modules
+engine=jest
+max_old_space_size=4096

.watchmanconfig.json

@@ -0,0 +1,3 @@
+{
+  "ignore_dirs": ["node_modules", ".git"]
+}

Makefile

@@ -1,11 +1,28 @@
-install:
-	npm ci
-
 gen-diff:
 	node bin/brain-games.js
 
 publish:
 	npm publish --dry-run
 
-link:
-	npm link
+install: deps-install
+	npx simple-git-hooks
+
+gen-diff-demonstration:
+	node bin/gen-diff.js __fixtures__/file1.json __fixtures__/file2.json
+
+deps-install:
+	npm ci --legacy-peer-deps
+
+deps-update:
+	npx ncu -u
+
+test:
+	npx jest
+
+test-coverage:
+	npx jest --coverage --coverageProvider=v8
+
+lint:
+	npx eslint .
+
+.PHONY: test

README.md

@@ -2,3 +2,4 @@
 
 [![Actions Status](https://github.com/sazanik/frontend-project-46/actions/workflows/hexlet-check.yml/badge.svg)](https://github.com/sazanik/frontend-project-46/actions)
 [![Maintainability](https://api.codeclimate.com/v1/badges/340d808eecf9f8cd511a/maintainability)](https://codeclimate.com/github/sazanik/frontend-project-46/maintainability)
+[![Test Coverage](https://api.codeclimate.com/v1/badges/340d808eecf9f8cd511a/test_coverage)](https://codeclimate.com/github/sazanik/frontend-project-46/test_coverage)

__fixtures__/result.txt

@@ -0,0 +1,8 @@
+{
+  - follow: false
+    host: hexlet.io
+  - proxy: 123.234.53.22
+  - timeout: 50
+  + timeout: 20
+  + verbose: true
+}

eslint.config.js

@@ -0,0 +1,81 @@
+import globals from 'globals';
+import { FlatCompat } from '@eslint/eslintrc';
+import pluginJs from '@eslint/js';
+import importPlugin from 'eslint-plugin-import';
+import eslintConfigPrettier from 'eslint-config-prettier';
+
+import { __dirname } from './globals.js';
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: pluginJs.configs.recommended,
+});
+
+export default [
+  {
+    settings: {
+      'import/resolver': {
+        node: {
+          extensions: ['.js'],
+        },
+      },
+    },
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+        ...globals.jest,
+      },
+      parserOptions: {
+        // Eslint doesn't supply ecmaVersion in `parser.js` `context.parserOptions`
+        // This is required to avoid ecmaVersion < 2015 error or 'import' / 'export' error
+        ecmaVersion: 2025,
+        sourceType: 'module',
+      },
+    },
+    plugins: {
+      import: importPlugin,
+    },
+    rules: {
+      ...importPlugin.configs.recommended.rules,
+    },
+  },
+  ...compat.extends('airbnb-base'),
+  {
+    rules: {
+      'no-underscore-dangle': [
+        'error',
+        {
+          allow: ['__filename', '__dirname'],
+        },
+      ],
+      'import/extensions': [
+        'error',
+        {
+          js: 'always',
+        },
+      ],
+      // FIXME: getting error with ?? operator, when enabled
+      'import/named': ['off'],
+      'import/no-named-as-default': 'off',
+      'import/no-named-as-default-member': 'off',
+      'import/no-extraneous-dependencies': 'off',
+      'import/prefer-default-export': 'off',
+      'max-len': ['warn', { code: 120 }],
+      'no-unused-vars': 'error',
+      'no-console': 'off',
+      'no-debugger': 'warn',
+      'prefer-const': 'error',
+      'import/no-unresolved': 'error',
+      'import/order': [
+        'error', {
+          'newlines-between': 'always',
+          groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
+        }],
+      indent: ['error', 2],
+      semi: ['error', 'always'],
+      quotes: ['error', 'single'],
+    },
+  },
+  eslintConfigPrettier,
+];

globals.js

@@ -0,0 +1,5 @@
+import { fileURLToPath } from 'url';
+import path from 'path';
+
+export const __filename = fileURLToPath(import.meta.url);
+export const __dirname = path.dirname(__filename);