feat: replace using AST, add more tests

Author: bgub

.claude/settings.local.json

@@ -0,0 +1,8 @@
+module.exports = [
+  {
+    rules: {
+      "quotes": ["error", "double"],
+      "indent": ["error", 2]
+    }
+  }
+]

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/cjs-flat-config.eslint.cjs

@@ -0,0 +1,18 @@
+{
+  "name": "complex-scripts-app",
+  "version": "1.0.0",
+  "scripts": {
+    "lint": "next lint --fix --dir src --dir pages",
+    "lint:strict": "next lint --strict",
+    "lint:ci": "next lint --quiet --output-file lint-results.json",
+    "precommit": "next lint --fix && npm test",
+    "test": "jest && next lint",
+    "complex": "npm run build && next lint --dir . --ext .js,.jsx,.ts,.tsx 2>/dev/null",
+    "pipe": "next lint | tee lint.log",
+    "redirect": "next lint > output.txt 2>&1",
+    "multi": "next lint; next build; next lint --fix"
+  },
+  "dependencies": {
+    "next": "15.0.0"
+  }
+}

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/complex-scripts.input.json

@@ -0,0 +1,23 @@
+{
+  "name": "complex-scripts-app",
+  "version": "1.0.0",
+  "scripts": {
+    "lint": "eslint --fix src pages",
+    "lint:strict": "eslint --max-warnings 0 .",
+    "lint:ci": "eslint --quiet --output-file lint-results.json .",
+    "precommit": "eslint --fix . && npm test",
+    "test": "jest && eslint .",
+    "complex": "npm run build && eslint . 2>/dev/null",
+    "pipe": "eslint . | tee lint.log",
+    "redirect": "eslint . > output.txt 2>&1",
+    "multi": "eslint .; next build; eslint --fix ."
+  },
+  "dependencies": {
+    "next": "15.0.0"
+  },
+  "devDependencies": {
+    "eslint": "^9",
+    "eslint-config-next": "15.0.0",
+    "@eslint/eslintrc": "^3"
+  }
+}

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/complex-scripts.output.json

@@ -0,0 +1,14 @@
+export default [
+  {
+    rules: {
+      "no-console": "warn",
+      "semi": ["error", "always"]
+    }
+  },
+  {
+    files: ["**/*.test.js"],
+    rules: {
+      "no-console": "off"
+    }
+  }
+]

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/existing-flat-config.eslint.js

@@ -0,0 +1,11 @@
+{
+  "name": "app-with-flat-config",
+  "version": "1.0.0",
+  "scripts": {
+    "lint": "next lint",
+    "lint:fix": "next lint --fix"
+  },
+  "dependencies": {
+    "next": "15.0.0"
+  }
+}

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/existing-flat-config.input.json

@@ -0,0 +1,16 @@
+{
+  "name": "app-with-flat-config",
+  "version": "1.0.0",
+  "scripts": {
+    "lint": "eslint .",
+    "lint:fix": "eslint --fix ."
+  },
+  "dependencies": {
+    "next": "15.0.0"
+  },
+  "devDependencies": {
+    "eslint": "^9",
+    "eslint-config-next": "15.0.0",
+    "@eslint/eslintrc": "^3"
+  }
+}

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/existing-flat-config.output.json

@@ -0,0 +1,10 @@
+export default [
+  {
+    ignores: ["dist/**", "coverage/**"]
+  },
+  {
+    rules: {
+      "no-unused-vars": "warn"
+    }
+  }
+]

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/existing-ignores.eslint.js

@@ -0,0 +1,7 @@
+{
+  "name": "app-without-scripts",
+  "version": "1.0.0",
+  "dependencies": {
+    "next": "15.0.0"
+  }
+}

packages/next-codemod/transforms/__testfixtures__/next-lint-to-eslint-cli/no-scripts.input.json

@@ -0,0 +1,13 @@
+{
+  "name": "app-without-scripts",
+  "version": "1.0.0",
+  "scripts": {},
+  "dependencies": {
+    "next": "15.0.0"
+  },
+  "devDependencies": {
+    "eslint": "^9",
+    "eslint-config-next": "15.0.0",
+    "@eslint/eslintrc": "^3"
+  }
+}