chore: replace ESLint & Prettier with oxlint & oxfmt

Author: jviide

.changeset/dry-kiwis-float.md

@@ -0,0 +1,5 @@
+---
+"@badrap/libapp": patch
+---
+
+Switch from ESLint + Prettier to oxlint + oxfmt

.devcontainer/Dockerfile

@@ -5,4 +5,3 @@ RUN apk add --no-cache \
   ripgrep
 RUN mkdir -p /workspace && chown node:node /workspace
 USER node
-RUN mkdir -p /workspace/node_modules /workspace/dist

.devcontainer/devcontainer.json

@@ -5,19 +5,11 @@
   },
   "postCreateCommand": "npm ci",
   "remoteUser": "node",
-  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind",
   "workspaceFolder": "/workspace",
-  "mounts": [
-    "type=volume,target=/workspace/node_modules",
-    "type=volume,target=/workspace/dist"
-  ],
   "customizations": {
     "vscode": {
-      "extensions": [
-        "dbaeumer.vscode-eslint",
-        "esbenp.prettier-vscode",
-        "ms-azuretools.vscode-docker"
-      ]
+      "extensions": ["oxc.oxc-vscode"]
     }
   }
 }

.github/workflows/ci.yml

@@ -23,5 +23,4 @@ jobs:
           node-version: 24
           cache: npm
       - run: npm ci
-      - run: npm run lint
-      - run: npm run typecheck
+      - run: npm run check

.github/workflows/version-or-publish.yml

@@ -25,8 +25,7 @@ jobs:
           # Allow caching, as this job can't write and doesn't produce any artifacts.
           cache: npm
       - run: npm ci
-      - run: npm run lint
-      - run: npm run typecheck
+      - run: npm run check
 
   changesets:
     needs: check

.oxfmtrc.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "./node_modules/oxfmt/configuration_schema.json",
+  "printWidth": 80,
+  "sortImports": {
+    "newlinesBetween": false
+  }
+}

.oxlintrc.json

@@ -0,0 +1,105 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["typescript"],
+  "categories": {
+    "correctness": "error",
+    "suspicious": "error",
+    "pedantic": "error"
+  },
+  "options": {
+    "denyWarnings": true,
+    "reportUnusedDisableDirectives": "warn",
+    "typeAware": true,
+    "typeCheck": true
+  },
+  "rules": {
+    // category: "correctness" (overrides, enabled in categories)
+    "@typescript-eslint/restrict-template-expressions": [
+      "error",
+      {
+        "allowAny": false,
+        "allowArray": false,
+        "allowBoolean": false,
+        "allowNever": false,
+        "allowNullish": false,
+        "allowNumber": true,
+        "allowRegExp": false
+      }
+    ],
+
+    // category: "suspicious" (overrides, enabled in categories)
+    "no-shadow": "off",
+    "@typescript-eslint/no-unsafe-type-assertion": "off",
+
+    // category: "pedantic" (overrides, enabled in categories)
+    "array-callback-return": "off",
+    "eqeqeq": ["error", "smart"],
+    "max-classes-per-file": "off",
+    "max-depth": "off",
+    "max-lines": "off",
+    "max-lines-per-function": "off",
+    "no-else-return": "off",
+    "no-inline-comments": "off",
+    "no-negated-condition": "off",
+    "require-await": "off",
+    "@typescript-eslint/ban-types": "off",
+    "@typescript-eslint/no-confusing-void-expression": "off",
+    "@typescript-eslint/restrict-plus-operands": [
+      "error",
+      {
+        "allowAny": false,
+        "allowBoolean": false,
+        "allowNullish": false,
+        "allowNumberAndString": false,
+        "allowRegExp": false
+      }
+    ],
+    "@typescript-eslint/return-await": [
+      "error",
+      "error-handling-correctness-only"
+    ],
+    "@typescript-eslint/strict-boolean-expressions": "off",
+
+    // category: "restriction" (not enabled via categories)
+    "no-empty": "error",
+    "no-empty-function": "error",
+    "no-regex-spaces": "error",
+    "no-var": "error",
+    "no-console": "warn",
+    "@typescript-eslint/no-empty-object-type": "error",
+    "@typescript-eslint/no-explicit-any": "error",
+    "@typescript-eslint/no-invalid-void-type": "error",
+    "@typescript-eslint/no-namespace": ["error", { "allowDeclarations": true }],
+    "@typescript-eslint/no-non-null-asserted-nullish-coalescing": "error",
+    "@typescript-eslint/no-require-imports": "error",
+    "@typescript-eslint/non-nullable-type-assertion-style": "error",
+    "@typescript-eslint/prefer-literal-enum-member": "error",
+    "@typescript-eslint/use-unknown-in-catch-callback-variable": "error",
+
+    // category: "style" (not enabled via categories)
+    "no-multi-assign": "error",
+    "no-return-assign": "error",
+    "prefer-const": "error",
+    "prefer-rest-params": "error",
+    "prefer-spread": "error",
+    "@typescript-eslint/adjacent-overload-signatures": "error",
+    "@typescript-eslint/array-type": "error",
+    "@typescript-eslint/class-literal-property-style": "error",
+    "@typescript-eslint/consistent-generic-constructors": "error",
+    "@typescript-eslint/consistent-type-assertions": "error",
+    "@typescript-eslint/no-inferrable-types": "error",
+    "@typescript-eslint/prefer-function-type": "error",
+    "@typescript-eslint/prefer-reduce-type-parameter": "error",
+
+    // category: "nursery" (not enabled via categories)
+    "no-unreachable": "error",
+    "@typescript-eslint/dot-notation": "error",
+    "@typescript-eslint/no-unnecessary-condition": "error",
+    "@typescript-eslint/no-unnecessary-type-parameters": "error",
+    "@typescript-eslint/no-useless-default-assignment": "error",
+    "@typescript-eslint/prefer-find": "error",
+    "@typescript-eslint/prefer-optional-chain": "error",
+    "@typescript-eslint/prefer-regexp-exec": "error",
+    "@typescript-eslint/prefer-string-starts-ends-with": "error"
+  }
+}

.vscode/settings.json

@@ -1,14 +1,14 @@
 {
   "editor.codeActionsOnSave": {
-    "source.fixAll.eslint": "explicit"
+    "source.fixAll.oxc": "always"
   },
-  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.defaultFormatter": "oxc.oxc-vscode",
   "editor.formatOnSave": true,
-  "editor.tabSize": 2,
+  "editor.formatOnSaveMode": "file",
   "files.exclude": {
     "node_modules": true,
     "dist": true,
     ".cache": true
   },
-  "typescript.tsdk": "node_modules/typescript/lib"
+  "js/ts.tsdk.path": "node_modules/typescript/lib"
 }