feat(linter): auto generate oxlint.config.ts types

apps/oxlint/package.json

@@ -34,6 +34,7 @@
     "build-napi-test": "pnpm run build-napi --features testing",
     "build-napi-release": "pnpm run build-napi --release --features allocator",
     "build-js": "node scripts/build.ts",
+    "generate-config-types": "node scripts/generate-config-types.ts",
     "test": "vitest --dir ./test run",
     "init-conformance": "cd conformance; ./init.sh",
     "conformance": "cross-env NODE_DISABLE_COLORS=1 tsx ./conformance/src/index.ts"
@@ -54,6 +55,7 @@
     "eslint-vitest-rule-tester": "^3.0.1",
     "esquery": "^1.6.0",
     "execa": "^9.6.0",
+    "json-schema-to-typescript": "^15.0.4",
     "json-stable-stringify-without-jsonify": "^1.0.1",
     "oxc-parser": "^0.111.0",
     "rolldown": "catalog:",

apps/oxlint/scripts/generate-config-types.ts

@@ -0,0 +1,31 @@
+// oxlint-disable no-console
+
+import { existsSync, readFileSync, writeFileSync } from "node:fs";
+import { dirname, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+import { compile } from "json-schema-to-typescript";
+
+const scriptDir = dirname(fileURLToPath(import.meta.url));
+const oxlintDir = resolve(scriptDir, "..");
+const repoRoot = resolve(oxlintDir, "..", "..");
+
+const schemaPath = resolve(repoRoot, "npm/oxlint/configuration_schema.json");
+const outputPath = resolve(oxlintDir, "src-js/package/config.generated.ts");
+
+if (!existsSync(schemaPath)) {
+  throw new Error(`Missing schema at ${schemaPath}. Run just linter-schema-json first.`);
+}
+
+const schema = JSON.parse(readFileSync(schemaPath, "utf8"));
+
+const bannerComment =
+  "/*\n" +
+  " * This file is generated from npm/oxlint/configuration_schema.json.\n" +
+  " * Run `just linter-config-ts` to regenerate.\n" +
+  " */";
+
+const ts = await compile(schema, "OxlintConfig", { bannerComment });
+
+writeFileSync(outputPath, ts);
+console.log(`Wrote ${outputPath}`);