Enable type generation in internal repo

Author: danlapid

types/scripts/build-types.ts

@@ -7,8 +7,9 @@ import path from "node:path";
 import prettier from "prettier";
 import ts from "typescript";
 import { SourcesMap, createMemoryProgram } from "../src/program.js";
+import { getFilePath } from "../src/utils";
 
-const OUTPUT_PATH = "types/definitions";
+const OUTPUT_PATH = getFilePath("types/definitions");
 const ENTRYPOINTS = [
   { compatDate: "2021-01-01", name: "oldest" },
   // https://developers.cloudflare.com/workers/platform/compatibility-dates/#formdata-parsing-supports-file
@@ -99,7 +100,7 @@ function spawnWorkerd(
 ): Promise<{ url: URL; kill: () => Promise<void> }> {
   return new Promise((resolve) => {
     const workerdProcess = childProcess.spawn(
-      "./src/workerd/server/workerd",
+      getFilePath("src/workerd/server/workerd"),
       ["serve", "--verbose", "--experimental", "--control-fd=3", configPath],
       { stdio: ["inherit", "inherit", "inherit", "pipe"] }
     );
@@ -150,7 +151,7 @@ async function buildAllEntrypoints(workerUrl: URL) {
     await buildEntrypoint(entrypoint, workerUrl);
 }
 export async function main() {
-  const worker = await spawnWorkerd("./types/scripts/config.capnp");
+  const worker = await spawnWorkerd(getFilePath("types/scripts/config.capnp"));
   try {
     await buildAllEntrypoints(worker.url);
   } finally {

types/scripts/build-worker.ts

@@ -5,6 +5,7 @@ import { build } from "esbuild";
 import { CommentsData } from "src/transforms";
 import cloudflareComments from "../src/cloudflare";
 import { collateStandardComments } from "../src/standards";
+import { getFilePath } from "../src/utils";
 
 async function readPath(rootPath: string): Promise<string> {
   try {
@@ -29,7 +30,7 @@ async function readParamNames() {
     ["DurableObjectStorageOperations", "DurableObjectTransaction"],
   ];
 
-  const data = await fs.readFile("src/workerd/tools/param-names.json", "utf8");
+  const data = await fs.readFile(getFilePath("src/workerd/tools/param-names.json"), "utf8");
   const recordArray = JSON.parse(data) as {
     fully_qualified_parent_name: string[];
     function_like_name: string;
@@ -103,9 +104,9 @@ if (require.main === module)
     external: ["node:*", "workerd:*"],
     bundle: true,
     minify: true,
-    outdir: "types/dist",
+    outdir: getFilePath("types/dist"),
     outExtension: { ".js": ".mjs" },
-    entryPoints: ["types/src/worker/index.ts"],
+    entryPoints: [getFilePath("types/src/worker/index.ts")],
     plugins: [
       {
         name: "raw",

types/src/utils.ts

@@ -0,0 +1,11 @@
+import { existsSync } from "node:fs";
+import path from "node:path";
+
+// When building types from the upstream repo all paths need to be prepended by external/workerd/
+export function getFilePath(f: string) {
+  if (existsSync("external/workerd")) {
+    return path.join("external", "workerd", f);
+  } else {
+    return f;
+  }
+}