Add nxw.js file (#8362)

It makes the Nx VS Code extension work on my computer. The generated
file says it must be commited.

.nx/nxw.js

@@ -0,0 +1,115 @@
+"use strict";
+// This file should be committed to your repository! It wraps Nx and ensures
+// that your local installation matches nx.json.
+// See: https://nx.dev/recipes/installation/install-non-javascript for more info.
+
+
+
+
+Object.defineProperty(exports, "__esModule", { value: true });
+const fs = require('fs');
+const path = require('path');
+const cp = require('child_process');
+const installationPath = path.join(__dirname, 'installation', 'package.json');
+function matchesCurrentNxInstall(currentInstallation, nxJsonInstallation) {
+    if (!currentInstallation.devDependencies ||
+        !Object.keys(currentInstallation.devDependencies).length) {
+        return false;
+    }
+    try {
+        if (currentInstallation.devDependencies['nx'] !==
+            nxJsonInstallation.version ||
+            require(path.join(path.dirname(installationPath), 'node_modules', 'nx', 'package.json')).version !== nxJsonInstallation.version) {
+            return false;
+        }
+        for (const [plugin, desiredVersion] of Object.entries(nxJsonInstallation.plugins || {})) {
+            if (currentInstallation.devDependencies[plugin] !== desiredVersion) {
+                return false;
+            }
+        }
+        return true;
+    }
+    catch {
+        return false;
+    }
+}
+function ensureDir(p) {
+    if (!fs.existsSync(p)) {
+        fs.mkdirSync(p, { recursive: true });
+    }
+}
+function getCurrentInstallation() {
+    try {
+        return require(installationPath);
+    }
+    catch {
+        return {
+            name: 'nx-installation',
+            version: '0.0.0',
+            devDependencies: {},
+        };
+    }
+}
+function performInstallation(currentInstallation, nxJson) {
+    fs.writeFileSync(installationPath, JSON.stringify({
+        name: 'nx-installation',
+        devDependencies: {
+            nx: nxJson.installation.version,
+            ...nxJson.installation.plugins,
+        },
+    }));
+    try {
+        cp.execSync('npm i', {
+            cwd: path.dirname(installationPath),
+            stdio: 'inherit',
+        });
+    }
+    catch (e) {
+        // revert possible changes to the current installation
+        fs.writeFileSync(installationPath, JSON.stringify(currentInstallation));
+        // rethrow
+        throw e;
+    }
+}
+function ensureUpToDateInstallation() {
+    const nxJsonPath = path.join(__dirname, '..', 'nx.json');
+    let nxJson;
+    try {
+        nxJson = require(nxJsonPath);
+        if (!nxJson.installation) {
+            console.error('[NX]: The "installation" entry in the "nx.json" file is required when running the nx wrapper. See https://nx.dev/recipes/installation/install-non-javascript');
+            process.exit(1);
+        }
+    }
+    catch {
+        console.error('[NX]: The "nx.json" file is required when running the nx wrapper. See https://nx.dev/recipes/installation/install-non-javascript');
+        process.exit(1);
+    }
+    try {
+        ensureDir(path.join(__dirname, 'installation'));
+        const currentInstallation = getCurrentInstallation();
+        if (!matchesCurrentNxInstall(currentInstallation, nxJson.installation)) {
+            performInstallation(currentInstallation, nxJson);
+        }
+    }
+    catch (e) {
+        const messageLines = [
+            '[NX]: Nx wrapper failed to synchronize installation.',
+        ];
+        if (e instanceof Error) {
+            messageLines.push('');
+            messageLines.push(e.message);
+            messageLines.push(e.stack);
+        }
+        else {
+            messageLines.push(e.toString());
+        }
+        console.error(messageLines.join('\n'));
+        process.exit(1);
+    }
+}
+if (!process.env.NX_WRAPPER_SKIP_INSTALL) {
+    ensureUpToDateInstallation();
+}
+
+require('./installation/node_modules/nx/bin/nx');