feat(cubejs-cli): Improve external commands support

packages/cubejs-cli/src/cli.js

@@ -283,11 +283,13 @@ program
     console.log('  $ cubejs deploy');
   });
 
-configureDevServerCommand(program);
-configureServerCommand(program);
+(async () => {
+  await configureDevServerCommand(program);
+  await configureServerCommand(program);
 
-if (!process.argv.slice(2).length) {
-  program.help();
-}
+  if (!process.argv.slice(2).length) {
+    program.help();
+  }
 
-program.parse(process.argv);
+  program.parse(process.argv);
+})();

packages/cubejs-cli/src/command/dev-server.ts

@@ -1,27 +1,6 @@
 import type { CommanderStatic } from 'commander';
-import { displayError, requireFromPackage, requiredPackageExists } from '../utils';
-
-async function devServerCommand() {
-  await requiredPackageExists('@cubejs-backend/server');
-
-  const OriginalCommandPackage = await requireFromPackage('@cubejs-backend/server/dist/command/dev-server');
-  // eslint-disable-next-line new-cap
-  const Command = new OriginalCommandPackage.default([]);
-  return Command.run();
-}
+import { proxyCommand } from './proxy-command';
 
 export function configureDevServerCommand(program: CommanderStatic) {
-  program
-    .command('dev-server')
-    .description('Run server in Development mode')
-    .action(
-      () => devServerCommand()
-        .catch((e) => displayError(e.stack || e))
-    )
-    .on('--help', () => {
-      console.log('');
-      console.log('Examples:');
-      console.log('');
-      console.log('  $ cubejs dev-server');
-    });
+  return proxyCommand(program, 'dev-server');
 }

packages/cubejs-cli/src/command/proxy-command.ts

@@ -0,0 +1,40 @@
+import { CommanderStatic } from 'commander';
+import { displayError, packageExists, requireFromPackage } from '../utils';
+import chalk from 'chalk';
+
+export async function proxyCommand(program: CommanderStatic, command: string) {
+  const serverPackageExists = packageExists('@cubejs-backend/server');
+
+  const commandInfo = program
+    .command(command);
+
+  if (serverPackageExists) {
+    const OriginalCommandPackage = await requireFromPackage(`@cubejs-backend/server/dist/command/${command}`);
+    // eslint-disable-next-line new-cap
+    const Command = new OriginalCommandPackage.default([]);
+
+    commandInfo
+      .description(OriginalCommandPackage.default.description)
+      .action(
+        () => Command.run().catch(
+          (e: any) => displayError(e.stack || e.message)
+        )
+      );
+  } else {
+    commandInfo
+      .description(
+        chalk.red('Unavailable.') + ' Please run this command from project directory.'
+      )
+      .action(
+        () => displayError('Unavailable. Please run this command from project directory.')
+      );
+  }
+
+  commandInfo
+    .on('--help', () => {
+      console.log('');
+      console.log('Examples:');
+      console.log('');
+      console.log(`  $ cubejs ${command}`);
+    });
+}

packages/cubejs-cli/src/command/server.ts

@@ -1,27 +1,6 @@
 import type { CommanderStatic } from 'commander';
-import { displayError, requiredPackageExists, requireFromPackage } from '../utils';
+import { proxyCommand } from './proxy-command';
 
-async function serverCommand() {
-  await requiredPackageExists('@cubejs-backend/server');
-
-  const OriginalCommandPackage = await requireFromPackage('@cubejs-backend/server/dist/command/server');
-  // eslint-disable-next-line new-cap
-  const Command = new OriginalCommandPackage.default([]);
-  return Command.run();
-}
-
-export function configureServerCommand(program: CommanderStatic) {
-  program
-    .command('server')
-    .description('Run server in Production mode')
-    .action(
-      () => serverCommand()
-        .catch((e) => displayError(e.stack || e))
-    )
-    .on('--help', () => {
-      console.log('');
-      console.log('Examples:');
-      console.log('');
-      console.log('  $ cubejs server');
-    });
+export async function configureServerCommand(program: CommanderStatic) {
+  return proxyCommand(program, 'server');
 }

packages/cubejs-cli/src/utils.ts

@@ -45,25 +45,35 @@ export const event = async (name: string, props: any) => {
   }
 };
 
-export const displayError = async (text: string, options = {}) => {
+export const displayError = async (text: string|string[], options = {}) => {
   console.error('');
   console.error(chalk.cyan('Cube.js Error ---------------------------------------'));
   console.error('');
+
   if (Array.isArray(text)) {
     text.forEach((str) => console.error(str));
   } else {
     console.error(text);
   }
+
   console.error('');
   console.error(chalk.yellow('Need some help? -------------------------------------'));
+
   await event('Error', { error: Array.isArray(text) ? text.join('\n') : text.toString(), ...options });
+
   console.error('');
   console.error(`${chalk.yellow('  Ask this question in Cube.js Slack:')} https://slack.cube.dev`);
   console.error(`${chalk.yellow('  Post an issue:')} https://github.com/cube-js/cube.js/issues`);
   console.error('');
+
   process.exit(1);
 };
 
+export const packageExists = (moduleName: string) => {
+  const modulePath = path.join(process.cwd(), 'node_modules', moduleName);
+  return fs.pathExistsSync(modulePath);
+}
+
 export const requiredPackageExists = async (moduleName: string) => {
   const modulePath = path.join(process.cwd(), 'node_modules', moduleName);
 

packages/cubejs-server/src/command/dev-server.ts

@@ -1,4 +1,4 @@
-import {Command, flags} from '@oclif/command';
+import { Command, flags } from '@oclif/command';
 
 export default class DevServer extends Command {
   static description = 'Run server in Development mode';

packages/cubejs-server/src/command/server.ts

@@ -1,4 +1,4 @@
-import {Command, flags} from '@oclif/command';
+import { Command, flags } from '@oclif/command';
 
 export default class Server extends Command {
   static description = 'Run server in Production mode';