fix: keep the production build's type check within 2 GB of memory #1431

next.config.ts

@@ -61,6 +61,12 @@ const nextConfig: NextConfig = {
   // it from node_modules at runtime instead of trying to bundle it. Used by
   // PLUGIN_DEV_DIR's on-the-fly bundler.
   serverExternalPackages: ["esbuild"],
+  // The build's type check leaves out tests, which are a third of the files
+  // and push tsc past the default heap on a 4 GB machine (#1431).
+  // `npm run typecheck` still checks them with tsconfig.json.
+  typescript: {
+    tsconfigPath: "tsconfig.build.json",
+  },
   // No proxyClientMaxBodySize: Next copies every body proxy.ts runs for up to
   // that size before routing, so it stays at the 10 MB default. The routes
   // that take bigger uploads (WOPI saves, WebDAV, /api/plugin-proxy) are left

tsconfig.build.json

@@ -0,0 +1,24 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "typeRoots": [
+      "./node_modules/@types"
+    ]
+  },
+  "exclude": [
+    "node_modules",
+    "repos",
+    "local-data",
+    "examples",
+    "integration",
+    ".next/dev/types",
+    "**/__tests__/**",
+    "**/*.test.ts",
+    "**/*.test.tsx",
+    "**/*.spec.ts",
+    "**/*.spec.tsx",
+    "vitest.config.ts",
+    "vitest.setup.ts",
+    "**/playwright*.config.ts"
+  ]
+}