Hack something together to test esbuild

Gulpfile.js

@@ -19,7 +19,7 @@ const cmdLineOptions = require("./scripts/build/options");
 const copyright = "CopyrightNotice.txt";
 const cleanTasks = [];
 
-const testRunner = "./built/local/testRunner/runner.js";
+const testRunner = "./built/local/testRunner.js";
 
 const buildScripts = () => buildProject("scripts");
 task("scripts", buildScripts);
@@ -94,9 +94,44 @@ const localize = async () => {
     }
 };
 
-const buildAll = () => buildProject("src");
+/**
+ * @param {string} entrypoint
+ * @param {string} outfile
+ */
+async function esbuild(entrypoint, outfile) {
+    await exec("node_modules/esbuild/bin/esbuild", [
+        entrypoint,
+        "--bundle",
+        `--outfile=${outfile}`,
+        "--platform=node",
+        "--target=node12",
+        "--sourcemap",
+        "--external:./node_modules/*",
+        "--conditions=require",
+    ]);
+}
+
+const preBundle = parallel(generateLibs, series(buildScripts, localize, generateDiagnostics));
+
+const bundleTsc = () => esbuild("./src/tsc/tsc.ts", "./built/local/tsc.js");
+const bundleTypescript = () => esbuild("./src/typescript/typescript.ts", "./built/local/typescript.js");
+const bundleServer = () => esbuild("./src/tsserver/server.ts", "./built/local/tsserver.js");
+const bundleServerLibrary = () => esbuild("./src/tsserverlibrary/tsserverlibrary.ts", "./built/local/tsserverlibrary.js");
+const bundleTests = () => esbuild("./src/testRunner/_namespaces/Harness.ts", testRunner);
+
+
+const bundleAll = series([
+    bundleTsc,
+    bundleTypescript,
+    bundleServer,
+    bundleServerLibrary,
+    bundleTests,
+]);
+task("bundle", series(preBundle, bundleAll));
+
 
-task("moduleBuild", parallel(generateLibs, series(buildScripts, localize, buildAll)));
+const buildSrc = () => buildProject("src");
+task("buildSrc", series(preBundle, bundleAll, buildSrc));
 
 const apiExtractor = async () => {
     async function runApiExtractor(configPath) {
@@ -114,17 +149,17 @@ const apiExtractor = async () => {
     await runApiExtractor("./src/tsserverlibrary/api-extractor.json");
 };
 
-task("api-extractor", series(task("moduleBuild"), apiExtractor));
+task("api-extractor", series(buildSrc, apiExtractor));
 
 const buildDebugTools = () => buildProject("src/debug");
 const cleanDebugTools = () => cleanProject("src/debug");
 cleanTasks.push(cleanDebugTools);
 
 // Pre-build steps when targeting the LKG compiler
-const lkgPreBuild = parallel(generateLibs, series(buildScripts, generateDiagnostics, buildDebugTools));
+const lkgPreBuild = parallel(generateLibs, series(buildScripts, generateDiagnostics /** , buildDebugTools */));
 
 const buildTsc = () => buildProject("src/tsc");
-task("tsc", series(lkgPreBuild, buildTsc));
+task("tsc", series(preBundle, bundleTsc));
 task("tsc").description = "Builds the command-line compiler";
 
 const cleanTsc = () => cleanProject("src/tsc");
@@ -244,7 +279,7 @@ task("dynamicImportCompat", buildDynamicImportCompat);
 const buildServerMain = () => buildProject("src/tsserver", cmdLineOptions);
 const buildServer = series(buildDynamicImportCompat, buildServerMain);
 buildServer.displayName = "buildServer";
-task("tsserver", series(preBuild, buildServer));
+task("tsserver", series(preBundle, bundleServer));
 task("tsserver").description = "Builds the language server";
 task("tsserver").flags = {
     "   --built": "Compile using the built version of the compiler."
@@ -461,7 +496,7 @@ const preTest = parallel(buildTsc, buildTests, buildServices, buildLssl);
 preTest.displayName = "preTest";
 
 const runTests = () => runConsoleTests(testRunner, "mocha-fivemat-progress-reporter", /*runInParallel*/ false, /*watchMode*/ false);
-task("runtests", series(/*preBuild, preTest,*/ task("moduleBuild"), runTests)); // TODO(jakebailey): fix this for modules
+task("runtests", series(/*preBuild, preTest,*/ bundleTests, runTests)); // TODO(jakebailey): fix this for modules
 task("runtests").description = "Runs the tests using the built run.js file.";
 task("runtests").flags = {
     "-t --tests=<regex>": "Pattern for tests to run.",
@@ -480,7 +515,7 @@ task("runtests").flags = {
 };
 
 const runTestsParallel = () => runConsoleTests(testRunner, "min", /*runInParallel*/ cmdLineOptions.workers > 1, /*watchMode*/ false);
-task("runtests-parallel", series(/*preBuild, preTest,*/ task("moduleBuild"), runTestsParallel)); // TODO(jakebailey): fix this for modules
+task("runtests-parallel", series(/*preBuild, preTest,*/ bundleTests, runTestsParallel)); // TODO(jakebailey): fix this for modules
 task("runtests-parallel").description = "Runs all the tests in parallel using the built run.js file.";
 task("runtests-parallel").flags = {
     "   --light": "Run tests in light mode (fewer verifications, but tests run faster).",