Auto gen update

generate.mjs

@@ -0,0 +1,68 @@
+import {spawnSync} from 'node:child_process';
+import fs from 'node:fs';
+
+export function execute(cmd, args, options) {
+  const { error, status } = spawnSync(cmd, args, {...options || {}, shell: true, stdio: 'inherit'});
+  if (error) {
+    throw new(Error);
+  }
+  if (status !== 0) {
+    throw new Error(`${cmd} exited with status code: ${status}`);
+  }
+}
+
+/**
+ * Transform generated to something closer to what we want
+ * so we have less manual work to do.
+ */
+function fixupGenerated(filename) {
+  let s = fs.readFileSync(filename, { encoding: 'utf-8' });
+
+  // replace ' | null>'  with ' null | undefined>'
+  // replace ' | null,'  with ' null | undefined,'
+  s = s.replace(/ \| null(>|,)/g, ' | null | undefined$1');
+
+  // replace Array<x> with Iterable<x>
+  s = s.replace(/\bArray<(.*?)>/g, 'Iterable<$1>');
+
+  // add new(): never;
+  s = s.replace(/(\ndeclare\svar\s\w+:\s\{\n\s+prototype:.*?\n)\};/g, '$1  new(): never;\n};');
+
+  // replace : GPUExtent3D -> : GPUExtent3DStrict
+  s = s.replace(/: GPUExtent3D\b/g, ': GPUExtent3DStrict');
+
+  // replace AllowSharedBufferSource -> BufferSource | SharedArrayBuffer
+  s = s.replace(/AllowSharedBufferSource/g, 'BufferSource | SharedArrayBuffer');
+
+  // replace Promise<... | undefined> with Promise<...>
+  s = s.replace(/( Promise<[^>]*?)\s+\|\s+undefined\s*>/g, '$1>');
+
+  // fix constants
+  const constants = [
+    'GPUBufferUsage',
+    'GPUColorWrite',
+    'GPUMapMode',
+    'GPUShaderStage',
+    'GPUTextureUsage',
+  ];
+  const constantRE = new RegExp(`interface (${constants.join('|')}) \\{`, 'g');
+  s = s.replace(constantRE, 'declare var $1: {');
+
+  // fix constructables
+  const constructables = [
+    'GPUInternalError',
+    'GPUPipelineError',
+    'GPUOutOfMemoryError',
+    'GPUUncapturedErrorEvent',
+    'GPUValidationError',
+  ];
+  const constructableRE = new RegExp(`(\\ndeclare var (${constructables.join('|')}):\\s{\\n[\\s\\S]*?\\snew\\s\\([^;]*?\\));\\n};`, 'g');
+  s = s.replace(constructableRE, '$1: $2;\n};');
+
+  fs.writeFileSync(filename, s);
+}
+
+execute('./node_modules/.bin/bikeshed-to-ts', ['--in', './gpuweb/spec/index.bs', '--out', './generated/index.d.ts', '--forceGlobal', '--nominal'])
+fixupGenerated('./generated/index.d.ts');
+execute('./node_modules/.bin/prettier', ['-w', 'generated/index.d.ts']);
+

package.json

@@ -13,7 +13,7 @@
   "scripts": {
     "test": "for t in tests/*/ ; do (cd \"$t\" && npm i && npm test); done",
     "build-docs": "cd tsdoc-src && npm ci && npm run build",
-    "generate": "bikeshed-to-ts --in ./gpuweb/spec/index.bs --out ./generated/index.d.ts --forceGlobal --nominal && prettier -w generated/index.d.ts",
+    "generate": "node generate.mjs",
     "format": "prettier -w dist/index.d.ts"
   },
   "devDependencies": {