Creates a smaller build of TypeScript which just has the language services

.dockerignore

@@ -22,6 +22,7 @@ scripts/buildProtocol.js
 scripts/ior.js
 scripts/authors.js
 scripts/configurePrerelease.js
+scripts/configureTSCBuild.js
 scripts/open-user-pr.js
 scripts/open-cherry-pick-pr.js
 scripts/processDiagnosticMessages.d.ts
@@ -45,4 +46,4 @@ TEST-results.xml
 package-lock.json
 tests
 .vscode
-.git
+.git

.gitignore

@@ -45,6 +45,8 @@ scripts/buildProtocol.js
 scripts/ior.js
 scripts/authors.js
 scripts/configurePrerelease.js
+scripts/configureLanguageServiceBuild.js
+scripts/createLanguageServiceBuild.js
 scripts/open-user-pr.js
 scripts/open-cherry-pick-pr.js
 scripts/processDiagnosticMessages.d.ts
@@ -92,4 +94,4 @@ tests/cases/user/webpack/webpack
 tests/cases/user/puppeteer/puppeteer
 tests/cases/user/axios-src/axios-src
 tests/cases/user/prettier/prettier
-.eslintcache
+.eslintcache

.npmignore

@@ -31,4 +31,8 @@ yarn.lock
 CONTRIBUTING.md
 TEST-results.xml
 .dockerignore
-Dockerfile
+Dockerfile
+.DS_Store
+.eslintrc.json
+.yarnrc
+tmp

Gulpfile.js

@@ -590,6 +590,10 @@ const configureExperimental = () => exec(process.execPath, ["scripts/configurePr
 task("configure-experimental", series(buildScripts, configureExperimental));
 task("configure-experimental").description = "Runs scripts/configurePrerelease.ts to prepare a build for experimental publishing";
 
+const createLanguageServicesBuild = () => exec(process.execPath, ["scripts/createLanguageServicesBuild.js"]);
+task("create-language-services-build", series(buildScripts, createLanguageServicesBuild));
+task("create-language-services-build").description = "Runs scripts/createLanguageServicesBuild.ts to prepare a build which only has the require('typescript') JS.";
+
 const publishNightly = () => exec("npm", ["publish", "--tag", "next"]);
 task("publish-nightly", series(task("clean"), task("LKG"), task("clean"), task("runtests-parallel"), publishNightly));
 task("publish-nightly").description = "Runs `npm publish --tag next` to create a new nightly build on npm";

scripts/configureLanguageServiceBuild.ts

@@ -0,0 +1,87 @@
+/// <reference types="node"/>
+import { normalize, dirname, join } from "path";
+import { readFileSync, writeFileSync, unlinkSync, existsSync } from "fs";
+import assert = require("assert");
+import { execSync } from "child_process";
+const args = process.argv.slice(2);
+
+/**
+ * A minimal description for a parsed package.json object.
+ */
+interface PackageJson {
+    name: string;
+    bin: {};
+    main: string;
+    scripts: {
+        prepare: string
+        postpublish: string
+    }
+}
+
+function main(): void {
+    if (args.length < 1) {
+        console.log("Usage:");
+        console.log("\tnode configureTSCBuild.js <package.json location>");
+        return;
+    }
+
+    // Acquire the version from the package.json file and modify it appropriately.
+    const packageJsonFilePath = normalize(args[0]);
+    const packageJsonValue: PackageJson = JSON.parse(readFileSync(packageJsonFilePath).toString());
+
+    // Remove the bin section from the current package
+    delete packageJsonValue.bin;
+    // We won't be running eslint which would run before publishing
+    delete packageJsonValue.scripts.prepare;
+    // No infinite loops
+    delete packageJsonValue.scripts.postpublish;
+
+    // Set the new name
+    packageJsonValue.name = "@typescript/language-services";
+
+    writeFileSync(packageJsonFilePath, JSON.stringify(packageJsonValue, /*replacer:*/ undefined, /*space:*/ 4));
+
+    // Remove the files which aren't use when just using the API
+    const toRemove = [
+        // JS Files
+        "tsserver.js",
+        "tsserverlibrary.js",
+        "typescriptServices.js",
+        "typingsInstaller.js",
+        "tsc.js",
+        // DTS files
+        "typescriptServices.d.ts",
+        "tsserverlibrary.d.ts"
+    ];
+
+    // Get a link to the main dependency JS file
+    const lib = join(dirname(packageJsonFilePath), packageJsonValue.main);
+    const libPath = dirname(lib);
+
+    // Remove the sibling JS large files referenced above
+    toRemove.forEach(file => {
+        const path = join(libPath, file);
+        if (existsSync(path)) unlinkSync(path);
+    });
+
+    // Remove VS-specific localization keys
+    execSync("rm -rf loc", { cwd: dirname(packageJsonFilePath) });
+
+    // Remove runnable file reference
+    execSync("rm -rf bin", { cwd: dirname(packageJsonFilePath) });
+
+    ///////////////////////////////////
+
+    // This section verifies that the build of TypeScript compiles and emits
+
+    const ts = require(lib);
+    const source = "let x: string = 'string'";
+
+    const results = ts.transpileModule(source, {
+        compilerOptions: { module: ts.ModuleKind.CommonJS }
+    });
+
+    assert(results.outputText.trim() === "var x = 'string';", `Running typescript with ${packageJsonValue.name} did not return the expected results, got: ${results.outputText}`);
+}
+
+main();

scripts/createLanguageServiceBuild.ts

@@ -0,0 +1,46 @@
+/// <reference types="node"/>
+import { join } from "path";
+import { readFileSync, unlinkSync } from "fs";
+import { tmpdir } from "os";
+import { execSync, ExecSyncOptions } from "child_process";
+import chalk from "chalk";
+
+interface PackageJson {
+    name: string;
+    version: string
+}
+
+const exec = (cmd: string, opts?: ExecSyncOptions) => {
+    console.log(chalk.gray(`> ${cmd} ${opts ? JSON.stringify(opts) : ""}`));
+    execSync(cmd, opts);
+};
+
+const step = (msg: string) => {
+    console.log("\n\n" + chalk.bold("- ") + msg);
+};
+
+function main(): void {
+    console.log(chalk.bold("## Creating the language services build of TypeScript"));
+    process.stdout.write(chalk.grey("> node /scripts/createLanguageServiceBuild.ts"));
+
+    // Create a tarball of the current version
+    step("Packing the current TypeScript via npm.");
+    exec("npm pack");
+
+    const packageJsonValue: PackageJson = JSON.parse(readFileSync("package.json", "utf8"));
+    const tarballFileName = `${packageJsonValue.name}-${packageJsonValue.version}.tgz`;
+
+    const unzipDir = tmpdir();
+    step(`Extracting the built version into a temporary folder. ${unzipDir}/package`);
+    exec(`tar -xvzf ${tarballFileName} -C ${unzipDir}`);
+    unlinkSync(tarballFileName);
+
+    step(`Updating the build metadata`);
+    const packagePath = join(unzipDir, "package");
+    exec(`node scripts/configureLanguageServiceBuild.js ${join(packagePath, "package.json")}`);
+
+    step(`Deploying the language service`);
+    exec("npm publish --access public", { cwd: packagePath });
+}
+
+main();