Make tsserver and typingsInstaller thin wrappers around public API (#55326)

Author: jakebailey

Herebyfile.mjs

@@ -184,6 +184,7 @@ async function runDtsBundler(entrypoint, output) {
  * @typedef BundlerTaskOptions
  * @property {boolean} [exportIsTsObject]
  * @property {boolean} [treeShaking]
+ * @property {boolean} [usePublicAPI]
  * @property {() => void} [onWatchRebuild]
  */
 function createBundler(entrypoint, outfile, taskOptions = {}) {
@@ -208,6 +209,19 @@ function createBundler(entrypoint, outfile, taskOptions = {}) {
             // legalComments: "none", // If we add copyright headers to the source files, uncomment.
         };
 
+        if (taskOptions.usePublicAPI) {
+            options.external = ["./typescript.js"];
+            options.plugins = options.plugins || [];
+            options.plugins.push({
+                name: "remap-typescript-to-require",
+                setup(build) {
+                    build.onLoad({ filter: /src[\\/]typescript[\\/]typescript\.ts$/ }, () => {
+                        return { contents: `export * from "./typescript.js"` };
+                    });
+                },
+            });
+        }
+
         if (taskOptions.exportIsTsObject) {
             // Monaco bundles us as ESM by wrapping our code with something that defines module.exports
             // but then does not use it, instead using the `ts` variable. Ensure that if we think we're CJS
@@ -235,7 +249,8 @@ function createBundler(entrypoint, outfile, taskOptions = {}) {
             const toCommonJsRegExp = /var __toCommonJS .*/;
             const toCommonJsRegExpReplacement = "var __toCommonJS = (mod) => (__copyProps, mod); // Modified helper to skip setting __esModule.";
 
-            options.plugins = [
+            options.plugins = options.plugins || [];
+            options.plugins.push(
                 {
                     name: "post-process",
                     setup: build => {
@@ -252,7 +267,7 @@ function createBundler(entrypoint, outfile, taskOptions = {}) {
                         });
                     },
                 },
-            ];
+            );
         }
 
         return options;
@@ -422,7 +437,8 @@ const { main: tsserver, watch: watchTsserver } = entrypointBuildTask({
     srcEntrypoint: "./src/tsserver/server.ts",
     builtEntrypoint: "./built/local/tsserver/server.js",
     output: "./built/local/tsserver.js",
-    mainDeps: [generateLibs],
+    mainDeps: [generateLibs, services],
+    bundlerOptions: { usePublicAPI: true },
 });
 export { tsserver, watchTsserver };
 
@@ -572,6 +588,8 @@ const { main: typingsInstaller, watch: watchTypingsInstaller } = entrypointBuild
     srcEntrypoint: "./src/typingsInstaller/nodeTypingsInstaller.ts",
     builtEntrypoint: "./built/local/typingsInstaller/nodeTypingsInstaller.js",
     output: "./built/local/typingsInstaller.js",
+    mainDeps: [services],
+    bundlerOptions: { usePublicAPI: true },
 });
 
 const { main: watchGuard, watch: watchWatchGuard } = entrypointBuildTask({

src/tsserver/_namespaces/ts.server.ts

@@ -1,8 +1 @@
-/* Generated file to emulate the ts namespace. */
-
-export * from "../../compiler/_namespaces/ts";
-export * from "../../services/_namespaces/ts";
-export * from "../../jsTyping/_namespaces/ts";
-export * from "../../server/_namespaces/ts";
-import * as server from "./ts.server";
-export { server };
+export * from "../../typescript/typescript";

src/tsserver/_namespaces/ts.ts

@@ -1,20 +1,12 @@
-import {
-    LanguageServiceMode,
-} from "./_namespaces/ts";
-import {
-    Logger,
-    LogLevel,
-    ServerCancellationToken,
-    SessionOptions,
-} from "./_namespaces/ts.server";
+import * as ts from "./_namespaces/ts";
 
 /** @internal */
 export function getLogLevel(level: string | undefined) {
     if (level) {
         const l = level.toLowerCase();
-        for (const name in LogLevel) {
+        for (const name in ts.server.LogLevel) {
             if (isNaN(+name) && l === name.toLowerCase()) {
-                return LogLevel[name] as any as LogLevel;
+                return ts.server.LogLevel[name] as any as ts.server.LogLevel;
             }
         }
     }
@@ -23,23 +15,23 @@ export function getLogLevel(level: string | undefined) {
 
 /** @internal */
 export interface StartSessionOptions {
-    globalPlugins: SessionOptions["globalPlugins"];
-    pluginProbeLocations: SessionOptions["pluginProbeLocations"];
-    allowLocalPluginLoads: SessionOptions["allowLocalPluginLoads"];
-    useSingleInferredProject: SessionOptions["useSingleInferredProject"];
-    useInferredProjectPerProjectRoot: SessionOptions["useInferredProjectPerProjectRoot"];
-    suppressDiagnosticEvents: SessionOptions["suppressDiagnosticEvents"];
-    noGetErrOnBackgroundUpdate: SessionOptions["noGetErrOnBackgroundUpdate"];
-    canUseWatchEvents: SessionOptions["canUseWatchEvents"];
-    serverMode: SessionOptions["serverMode"];
+    globalPlugins: ts.server.SessionOptions["globalPlugins"];
+    pluginProbeLocations: ts.server.SessionOptions["pluginProbeLocations"];
+    allowLocalPluginLoads: ts.server.SessionOptions["allowLocalPluginLoads"];
+    useSingleInferredProject: ts.server.SessionOptions["useSingleInferredProject"];
+    useInferredProjectPerProjectRoot: ts.server.SessionOptions["useInferredProjectPerProjectRoot"];
+    suppressDiagnosticEvents: ts.server.SessionOptions["suppressDiagnosticEvents"];
+    noGetErrOnBackgroundUpdate: ts.server.SessionOptions["noGetErrOnBackgroundUpdate"];
+    canUseWatchEvents: ts.server.SessionOptions["canUseWatchEvents"];
+    serverMode: ts.server.SessionOptions["serverMode"];
 }
 
 /** @internal */
 export interface StartInput {
     args: readonly string[];
-    logger: Logger;
-    cancellationToken: ServerCancellationToken;
-    serverMode: LanguageServiceMode | undefined;
+    logger: ts.server.Logger;
+    cancellationToken: ts.server.ServerCancellationToken;
+    serverMode: ts.LanguageServiceMode | undefined;
     unknownServerMode?: string;
-    startSession: (option: StartSessionOptions, logger: Logger, cancellationToken: ServerCancellationToken) => void;
+    startSession: (option: StartSessionOptions, logger: ts.server.Logger, cancellationToken: ts.server.ServerCancellationToken) => void;
 }