chore(dev-deps): bump to ESLint v9 (#1282)

eslint.config.mjs

@@ -0,0 +1,145 @@
+/**
+ * Copyright 2021 Bonitasoft S.A.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import noticePlugin from "eslint-plugin-notice";
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import eslintPluginImport from 'eslint-plugin-import';
+import * as eslintPluginMdx from 'eslint-plugin-mdx'
+
+/** @type {import('eslint').Linter.FlatConfig[]} */
+export default tseslint.config(
+    {
+        plugins: {
+            '@typescript-eslint': tseslint.plugin
+        },
+        extends: [
+            // eslint.configs.recommended,
+            eslintPluginPrettierRecommended, // Enables eslint-plugin-prettier, eslint-config-prettier and prettier/prettier. This will display prettier errors as ESLint errors.
+        ],
+        languageOptions: {
+            parser: tseslint.parser,
+            parserOptions: {
+                ecmaVersion: 2018, // Allows for the parsing of modern ECMAScript features
+                sourceType: 'module', // Allows for the use of imports
+            },
+        },
+        ignores: [
+            '.cache/',
+            'node_modules/',
+            'public/',
+            'build/',
+            '.github/',
+            '.idea/',
+            '/config/',
+        ],
+    },
+
+    {
+        // disable type-aware linting on JS files
+        files: ['**/*.js'],
+        ...tseslint.configs.disableTypeChecked,
+    },
+
+    // File-pattern specific overrides
+    // javascript & typescript
+    {
+        files: ['*.js', '*.ts', '*.tsx'],
+        plugins: {
+            notice: noticePlugin
+        },
+        rules: {
+            'notice/notice': [
+                'error',
+                {
+                    templateFile: 'config/license-header.js',
+                    onNonMatchingHeader: 'replace',
+                },
+            ],
+            'no-console': ['error', { allow: ['warn', 'error'] }],
+        },
+    },
+
+    // typescript
+    /** @type {import('@typescript-eslint/utils').TSESLint.FlatConfig.ConfigFile} */
+    {
+        files: ['**/*.ts', '**/*.tsx'],
+        extends: [...tseslint.configs.recommended, ...tseslint.configs.stylistic, eslintPluginImport.flatConfigs.recommended, eslintPluginImport.flatConfigs.typescript],
+        settings: {
+            'import/resolver': {
+                typescript: {
+                    alwaysTryTypes: true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`
+                    project: './tsconfig.json',
+                },
+            },
+        },
+        languageOptions: {
+            parserOptions: {
+                // This setting is required if you want to use rules which require type information
+                // https://typescript-eslint.io/packages/parser/#project
+                projectService: true,
+            },
+        },
+        rules: {
+            // Place to specify ESLint rules. Can be used to overwrite rules specified from the extended configs
+            '@typescript-eslint/consistent-type-definitions': 'off',
+            '@typescript-eslint/explicit-function-return-type': [
+                'warn',
+                {
+                    allowExpressions: true,
+                    allowTypedFunctionExpressions: true,
+                },
+            ],
+            '@typescript-eslint/explicit-member-accessibility': [
+                'error',
+                {
+                    accessibility: 'no-public',
+                },
+            ],
+            '@typescript-eslint/consistent-type-exports': [
+                'error',
+                {
+                    fixMixedExportsWithInlineTypeSpecifier: true,
+                },
+            ],
+            '@typescript-eslint/consistent-type-imports': ['error'],
+            '@typescript-eslint/dot-notation': 'error',
+            '@typescript-eslint/require-await': 'error',
+            '@typescript-eslint/no-floating-promises': 'error',
+            '@typescript-eslint/no-misused-promises': 'error',
+            '@typescript-eslint/restrict-plus-operands': 'error',
+        },
+    },
+
+    // markdown
+    {
+        ...eslintPluginMdx.flat,
+        // optional, if you want to lint code blocks at the same
+        processor: eslintPluginMdx.createRemarkProcessor({
+            lintCodeBlocks: true,
+        }),
+    },
+    {
+        ...eslintPluginMdx.flatCodeBlocks,
+        rules: {
+            ...eslintPluginMdx.rules,
+            // if you want to override some rules for code blocks
+            'no-var': 'error',
+            'prefer-const': 'error',
+        },
+    },
+);