Deploy May 21, 2025 (#890)

[Andrej Glavic] Add ability to compare commits from ./mach try perf with
lando ids (#884)
[Chineta Adinnu] Update Search to use `search` and `hash`  (#865)
[Julien Wajsberg] Update eslint to latest version, and migrate its
config to flat config (#885)
[Julien Wajsberg] Update build-related packages (#886)

Author: kala-moz

.eslintrc.js

@@ -21,3 +21,5 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+.eslintcache

.gitignore

@@ -0,0 +1,134 @@
+import js from '@eslint/js';
+import { defineConfig } from 'eslint/config';
+import prettierConfig from 'eslint-config-prettier/flat';
+import importPlugin from 'eslint-plugin-import';
+import jestPlugin from 'eslint-plugin-jest';
+import jestDomPlugin from 'eslint-plugin-jest-dom';
+import reactPlugin from 'eslint-plugin-react';
+import testingLibraryPlugin from 'eslint-plugin-testing-library';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+export default defineConfig([
+  js.configs.recommended,
+  reactPlugin.configs.flat.recommended,
+  reactPlugin.configs.flat['jsx-runtime'],
+  importPlugin.flatConfigs.recommended,
+  prettierConfig,
+  {
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+      },
+    },
+
+    settings: {
+      'import/resolver': {
+        typescript: true,
+        node: true,
+      },
+
+      react: { version: 'detect' },
+    },
+
+    rules: {
+      'import/order': [
+        'error',
+        {
+          groups: ['builtin', 'external', 'internal'],
+
+          pathGroups: [
+            {
+              pattern: 'react',
+              group: 'external',
+              position: 'before',
+            },
+          ],
+
+          pathGroupsExcludedImportTypes: ['react'],
+          'newlines-between': 'always',
+
+          alphabetize: {
+            order: 'asc',
+            caseInsensitive: true,
+          },
+        },
+      ],
+      // This rule doesn't seem important enough to be flagged.
+      'import/no-named-as-default-member': 'off',
+    },
+
+    linterOptions: {
+      // This property is specified both here in addition to the command line in
+      // package.json.
+      // The reason is that the property only warns but the command line option
+      // outputs errors, but the property is useful so that we have the information
+      // directly in editors.
+      reportUnusedDisableDirectives: true,
+    },
+  },
+  {
+    // TypeScript linting
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      tseslint.configs.recommendedTypeChecked,
+      importPlugin.flatConfigs.typescript,
+    ],
+
+    languageOptions: {
+      parserOptions: {
+        tsconfigRootDir: import.meta.dirname,
+        projectService: true,
+      },
+    },
+  },
+  {
+    // Typescript test files
+    files: ['src/__tests__/**/*.{ts,tsx}'],
+    extends: [
+      jestPlugin.configs['flat/recommended'],
+      jestPlugin.configs['flat/style'],
+      testingLibraryPlugin.configs['flat/react'],
+      jestDomPlugin.configs['flat/recommended'],
+    ],
+
+    languageOptions: {
+      parserOptions: {
+        ecmaFeatures: { jsx: true },
+      },
+    },
+
+    rules: {
+      // TODO: update tests to not use store directly and remove these overrides
+      // https://github.com/mozilla/perfcompare/issues/115
+      '@typescript-eslint/no-unsafe-member-access': 'off',
+      // We can be less strict in tests about non-null assertions, to make it easier.
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      // In tests we can accept that async functions do not have await directives.
+      '@typescript-eslint/require-await': 'off',
+
+      // This disallows using direct Node properties (eg: firstChild), but we have
+      // legitimate uses:
+      'testing-library/no-node-access': 'off',
+
+      // Other useful rules in testing-library
+      'testing-library/prefer-explicit-assert': [
+        'error',
+        { includeFindQueries: false },
+      ],
+
+      // Individual jest-formatting rules so that we format only test and describe blocks
+      'jest/padding-around-describe-blocks': 2,
+      'jest/padding-around-test-blocks': 2,
+    },
+  },
+  {
+    // JavaScript linting
+    files: ['**/*.js', '**/*.mjs'],
+    languageOptions: {
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+    },
+  },
+]);