chore(🧹): remove what the in-repo Dawn build left behind

.gitignore

@@ -1,6 +1,4 @@
-!packages/webgpu/scripts/build
 # Yarn
-.package/.yarn/*
 .yarn/*
 !.yarn/patches
 !.yarn/plugins
@@ -59,23 +57,9 @@ buck-out/
 
 # Build
 dist
-package/lib
 .vscode
 *.tgz
 
-
-# Externals
-packages/webgpu/libs
-# Dawn headers used to be copied here; the directory only holds the
-# vendored Dawn sources under common/ now (see scripts/check-dawn.ts).
-packages/webgpu/cpp/dawn/*
-!packages/webgpu/cpp/dawn/common/
-packages/webgpu/cpp/webgpu/
-packages/webgpu/lib
-!packages/webgpu/scripts/build
-artifacts/
-
-
 # Cocoapods
 #
 apps/example/**/Pods

packages/webgpu/package.json

@@ -41,7 +41,7 @@
     "clang-format-ios": "find apple/ -iname \"*.h\" -o -iname \"*.mm\" -o -iname \"*.cpp\" | xargs clang-format -i",
     "clang-format-android": "find android/cpp/ -iname \"*.h\" -o -iname \"*.m\" -o -iname \"*.cpp\" | xargs clang-format -i",
     "clang-format-common": "find cpp/rnwgpu -iname \"*.h\" -o -iname \"*.m\" -o -iname \"*.cpp\" | xargs clang-format -i",
-    "cpplint": "cpplint --linelength=230 --filter=-legal/copyright,-whitespace/indent,-whitespace/comments,-whitespace/ending_newline,-build/include_order,-runtime/references,-readability/todo,-whitespace/blank_line,-whitespace/todo,-runtime/int,-build/c++11,-whitespace/parens --exclude=example --exclude=android/.cxx --exclude=cpp/webgpu --exclude=cpp/dawn --exclude=ios --exclude=android/build --exclude=node_modules --recursive .",
+    "cpplint": "cpplint --linelength=230 --filter=-legal/copyright,-whitespace/indent,-whitespace/comments,-whitespace/ending_newline,-build/include_order,-runtime/references,-readability/todo,-whitespace/blank_line,-whitespace/todo,-runtime/int,-build/c++11,-whitespace/parens --exclude=android/.cxx --exclude=cpp/dawn --exclude=libs --exclude=android/build --exclude=node_modules --recursive .",
     "check-dawn": "tsx scripts/check-dawn.ts"
   },
   "keywords": [
@@ -80,9 +80,7 @@
     "@types/seedrandom": "^3.0.8",
     "@types/ws": "^8.5.10",
     "@webgpu/types": "0.1.65",
-    "baseline-browser-mapping": "^2.9.14",
     "clang-format": "^1.8.0",
-    "del-cli": "^5.1.0",
     "eslint": "9.35.0",
     "eslint-config-react-native-wcandillon": "5.0.1",
     "eslint-plugin-import": "2.32.0",
@@ -99,7 +97,6 @@
     "react-native-reanimated": "4.6.0",
     "react-native-web": "^0.21.2",
     "react-native-worklets": "0.12.2",
-    "rimraf": "^5.0.7",
     "seedrandom": "^3.0.5",
     "semantic-release": "^25.0.9",
     "semantic-release-yarn": "^3.0.2",
@@ -108,8 +105,7 @@
     "typescript": "^5.2.2",
     "webgpu": "0.4.0",
     "wgpu-matrix": "^3.0.2",
-    "ws": "^8.18.0",
-    "yargs": "^17.7.2"
+    "ws": "^8.18.0"
   },
   "dependencies": {
     "react-native-webgpu-dawn": "157.1.0"

packages/webgpu/scripts/check-dawn.ts

@@ -11,7 +11,7 @@
 //
 // Runs from `yarn check-dawn`, in CI right after `yarn install`.
 
-import { existsSync, readFileSync } from "fs";
+import { existsSync, readFileSync, readdirSync } from "fs";
 import { dirname, join } from "path";
 
 const dawnPackageJson =
@@ -49,6 +49,27 @@ const dawnWorkarounds = [
 ];
 
 const root = join(__dirname, "..");
+
+// Until #507 the build copied Dawn's headers into cpp/webgpu and cpp/dawn.
+// Both come before the package's include directory on every include path
+// (podspec HEADER_SEARCH_PATHS, android/CMakeLists.txt), so a copy left over
+// from that build silently shadows the headers the binaries were built from.
+// cpp/dawn/common is vendored on purpose (see the entry above).
+const staleHeaderDirs = [
+  "cpp/webgpu",
+  ...(existsSync(join(root, "cpp/dawn"))
+    ? readdirSync(join(root, "cpp/dawn"))
+        .filter((entry) => entry !== "common" && !entry.startsWith("."))
+        .map((entry) => `cpp/dawn/${entry}`)
+    : []),
+].filter((dir) => existsSync(join(root, dir)));
+if (staleHeaderDirs.length > 0) {
+  console.error(
+    `❌ Stale Dawn header copies shadow react-native-webgpu-dawn's include directory: ${staleHeaderDirs.join(", ")}. Delete them; Dawn's headers come from the package since #507.`,
+  );
+  process.exit(1);
+}
+
 let failed = false;
 for (const workaround of dawnWorkarounds) {
   const present = workaround.files.filter((file) => {