fix(core): use a main function inside nx.ts to avoid future hoisting issues (#15806)

Author: AgentEnder

packages/nx/bin/nx.ts

@@ -14,71 +14,73 @@ import { major } from 'semver';
 import { readJsonFile } from '../src/utils/fileutils';
 import { execSync } from 'child_process';
 
-const workspace = findWorkspaceRoot(process.cwd());
-// new is a special case because there is no local workspace to load
-if (
-  process.argv[2] === 'new' ||
-  process.argv[2] === '_migrate' ||
-  process.argv[2] === 'init' ||
-  (process.argv[2] === 'graph' && !workspace)
-) {
-  process.env.NX_DAEMON = 'false';
-  require('nx/src/command-line/nx-commands').commandsObject.argv;
-} else {
-  if (workspace && workspace.type === 'nx') {
-    require('v8-compile-cache');
-  }
-  // polyfill rxjs observable to avoid issues with multiple version of Observable installed in node_modules
-  // https://twitter.com/BenLesh/status/1192478226385428483?s=20
-  if (!(Symbol as any).observable)
-    (Symbol as any).observable = Symbol('observable polyfill');
+function main() {
+  const workspace = findWorkspaceRoot(process.cwd());
+  // new is a special case because there is no local workspace to load
+  if (
+    process.argv[2] === 'new' ||
+    process.argv[2] === '_migrate' ||
+    process.argv[2] === 'init' ||
+    (process.argv[2] === 'graph' && !workspace)
+  ) {
+    process.env.NX_DAEMON = 'false';
+    require('nx/src/command-line/nx-commands').commandsObject.argv;
+  } else {
+    if (workspace && workspace.type === 'nx') {
+      require('v8-compile-cache');
+    }
+    // polyfill rxjs observable to avoid issues with multiple version of Observable installed in node_modules
+    // https://twitter.com/BenLesh/status/1192478226385428483?s=20
+    if (!(Symbol as any).observable)
+      (Symbol as any).observable = Symbol('observable polyfill');
 
-  if (!workspace) {
-    output.log({
-      title: `The current directory isn't part of an Nx workspace.`,
-      bodyLines: [
-        `To create a workspace run:`,
-        chalk.bold.white(`npx create-nx-workspace@latest <workspace name>`),
-        '',
-        `To add Nx to existing workspace run with a workspace-specific nx.json:`,
-        chalk.bold.white(`npx add-nx-to-monorepo@latest`),
-        '',
-        `To add the default nx.json file run:`,
-        chalk.bold.white(`nx init`),
-      ],
-    });
+    if (!workspace) {
+      output.log({
+        title: `The current directory isn't part of an Nx workspace.`,
+        bodyLines: [
+          `To create a workspace run:`,
+          chalk.bold.white(`npx create-nx-workspace@latest <workspace name>`),
+          '',
+          `To add Nx to existing workspace run with a workspace-specific nx.json:`,
+          chalk.bold.white(`npx add-nx-to-monorepo@latest`),
+          '',
+          `To add the default nx.json file run:`,
+          chalk.bold.white(`nx init`),
+        ],
+      });
 
-    output.note({
-      title: `For more information please visit https://nx.dev/`,
-    });
-    process.exit(1);
-  }
+      output.note({
+        title: `For more information please visit https://nx.dev/`,
+      });
+      process.exit(1);
+    }
 
-  // Make sure that a local copy of Nx exists in workspace
-  let localNx: string;
-  try {
-    localNx = resolveNx(workspace);
-  } catch {
-    // If we can't resolve a local copy of Nx, we must be global.
-    warnIfUsingOutdatedGlobalInstall();
-    output.error({
-      title: `Could not find Nx modules in this workspace.`,
-      bodyLines: [`Have you run ${chalk.bold.white(`npm/yarn install`)}?`],
-    });
-    process.exit(1);
-  }
+    // Make sure that a local copy of Nx exists in workspace
+    let localNx: string;
+    try {
+      localNx = resolveNx(workspace);
+    } catch {
+      // If we can't resolve a local copy of Nx, we must be global.
+      warnIfUsingOutdatedGlobalInstall();
+      output.error({
+        title: `Could not find Nx modules in this workspace.`,
+        bodyLines: [`Have you run ${chalk.bold.white(`npm/yarn install`)}?`],
+      });
+      process.exit(1);
+    }
 
-  // this file is already in the local workspace
-  if (localNx === resolveNx(null)) {
-    initLocal(workspace);
-  } else {
-    // Nx is being run from globally installed CLI - hand off to the local
-    warnIfUsingOutdatedGlobalInstall(getLocalNxVersion(workspace));
-    if (localNx.includes('.nx')) {
-      const nxWrapperPath = localNx.replace(/\.nx.*/, '.nx/') + 'nxw.js';
-      require(nxWrapperPath);
+    // this file is already in the local workspace
+    if (localNx === resolveNx(null)) {
+      initLocal(workspace);
     } else {
-      require(localNx);
+      // Nx is being run from globally installed CLI - hand off to the local
+      warnIfUsingOutdatedGlobalInstall(getLocalNxVersion(workspace));
+      if (localNx.includes('.nx')) {
+        const nxWrapperPath = localNx.replace(/\.nx.*/, '.nx/') + 'nxw.js';
+        require(nxWrapperPath);
+      } else {
+        require(localNx);
+      }
     }
   }
 }
@@ -159,3 +161,5 @@ const getLatestVersionOfNx = ((fn: () => string) => {
   let cache: string = null;
   return () => cache || (cache = fn());
 })(_getLatestVersionOfNx);
+
+main();