feat: add project preview command

packages/cli/src/commands/preview-project/constants.ts

@@ -0,0 +1,23 @@
+import { Product } from './types';
+
+export const PRODUCT_PACKAGES = {
+  realm: '@redocly/realm',
+  'redoc-revel': '@redocly/redoc-revel',
+  'revel-reef': '@redocly/revel-reef',
+  'redoc-reef': '@redocly/redoc-reef',
+  redoc: '@redocly/redoc',
+  revel: '@redocly/revel',
+  reef: '@redocly/reef',
+};
+
+export const PRODUCT_NAMES: { [key in Product]: string } = {
+  redoc: 'Redoc',
+  revel: 'Revel',
+  reef: 'Reef',
+  realm: 'Realm',
+  'redoc-revel': 'Redoc + Revel',
+  'redoc-reef': 'Redoc + Reef',
+  'revel-reef': 'Revel + Reef',
+};
+
+export const PRODUCT_PLANS = ['pro', 'enterprise'] as const;

packages/cli/src/commands/preview-project/index.ts

@@ -0,0 +1,58 @@
+import path = require('path');
+import { existsSync, readFileSync } from 'fs';
+import { spawn } from 'child_process';
+import { PRODUCT_NAMES, PRODUCT_PACKAGES } from './constants';
+
+import type { PreviewProjectOptions, Product } from './types';
+
+export const previewProject = async (args: PreviewProjectOptions) => {
+  const { plan, port } = args;
+  const projectDir = args['source-dir'];
+
+  const product = args.product || tryGetProductFromPackageJson(projectDir);
+
+  if (!isValidProduct(product)) {
+    process.stderr.write(`Invalid product ${product}`);
+    throw new Error(`Project preview launch failed`);
+  }
+
+  const productName = PRODUCT_NAMES[product];
+  const packageName = PRODUCT_PACKAGES[product];
+
+  process.stdout.write(`\nLaunching preview of ${productName} ${plan} using NPX\n\n`);
+
+  spawn('npx', ['-y', packageName, 'develop', `--plan=${plan}`, `--port=${port || 4000}`], {
+    stdio: 'inherit',
+    cwd: projectDir,
+  });
+};
+
+const isValidProduct = (product: string | undefined): product is Product => {
+  if (!product) {
+    return false;
+  }
+
+  return !!PRODUCT_NAMES[product as Product];
+};
+
+const tryGetProductFromPackageJson = (projectDir: string): Product => {
+  const packageJsonPath = path.join(process.cwd(), projectDir, 'package.json');
+
+  if (existsSync(packageJsonPath)) {
+    try {
+      const packageJson = JSON.parse(readFileSync(packageJsonPath, 'utf-8'));
+      const packageJsonDeps = packageJson.dependencies || {};
+
+      for (const [product, packageName] of Object.entries(PRODUCT_PACKAGES)) {
+        if (packageJsonDeps[packageName]) {
+          process.stdout.write(`\n${packageName} detected in project's 'package.json'`);
+          return product as Product;
+        }
+      }
+    } catch (error) {
+      process.stdout.write(`Invalid 'package.json': ${packageJsonPath}. Using Realm.`);
+    }
+  }
+
+  return 'realm';
+};

packages/cli/src/commands/preview-project/types.ts

@@ -0,0 +1,12 @@
+import { PRODUCT_PACKAGES, PRODUCT_PLANS } from './constants';
+
+export type Product = keyof typeof PRODUCT_PACKAGES;
+export type ProductPlan = typeof PRODUCT_PLANS[number];
+
+export type PreviewProjectOptions = {
+  product?: Product | string;
+  plan: ProductPlan | string;
+  port?: number;
+  'source-dir': string;
+  config: string | undefined;
+};

packages/cli/src/index.ts

@@ -19,6 +19,8 @@ import { version } from './update-version-notifier';
 import type { Arguments } from 'yargs';
 import type { OutputFormat, RuleSeverity } from '@redocly/openapi-core';
 import type { BuildDocsArgv } from './commands/build-docs/types';
+import { previewProject } from './commands/preview-project';
+import { PRODUCT_PLANS } from './commands/preview-project/constants';
 
 if (!('replaceAll' in String.prototype)) {
   require('core-js/actual/string/replace-all');
@@ -417,6 +419,38 @@ yargs
       })(argv);
     }
   )
+  .command(
+    'preview',
+    'Preview Redocly project using one of the product NPM packages.',
+    (yargs) =>
+      yargs.options({
+        product: {
+          type: 'string',
+          choices: ['redoc', 'revel', 'reef', 'realm', 'redoc-revel', 'redoc-reef', 'revel-reef'],
+          description:
+            "Product used to launch preview. Default is inferred from project's package.json or 'realm' is used.",
+        },
+        plan: {
+          type: 'string',
+          choices: PRODUCT_PLANS,
+          default: 'enterprise',
+        },
+        port: {
+          type: 'number',
+          description: 'Preview port.',
+          default: 4000,
+        },
+        'source-dir': {
+          alias: 'd',
+          type: 'string',
+          description: 'Project directory.',
+          default: '.',
+        },
+      }),
+    (argv) => {
+      commandWrapper(previewProject)(argv);
+    }
+  )
   .command(
     'preview-docs [api]',
     'Preview API reference docs for an API description.',

packages/cli/src/types.ts

@@ -8,6 +8,7 @@ import type { StatsOptions } from './commands/stats';
 import type { SplitOptions } from './commands/split';
 import type { PreviewDocsOptions } from './commands/preview-docs';
 import type { BuildDocsArgv } from './commands/build-docs/types';
+import type { PreviewProjectOptions } from './commands/preview-project/types';
 
 export type Totals = {
   errors: number;
@@ -30,7 +31,9 @@ export type CommandOptions =
   | BundleOptions
   | LoginOptions
   | PreviewDocsOptions
-  | BuildDocsArgv;
+  | BuildDocsArgv
+  | PreviewProjectOptions;
+
 export type Skips = {
   'skip-rule'?: string[];
   'skip-decorator'?: string[];