chore: restrict bundling with --output but without inline apis

.changeset/fresh-spies-yawn.md

@@ -0,0 +1,5 @@
+---
+"@redocly/cli": patch
+---
+
+Clarified usage of the `--output` option in the `bundle` command.

__tests__/bundle/bundle-no-output-without-inline-apis/redocly.yaml

@@ -0,0 +1,7 @@
+apis:
+  main:
+    root: ./test.yaml
+    rules:
+      no-invalid-media-type-examples:
+        severity: error
+        allowAdditionalProperties: false

__tests__/bundle/bundle-no-output-without-inline-apis/snapshot.js

@@ -0,0 +1,33 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`E2E bundle bundle should NOT be invoked IF no positional apis provided AND --output specified 1`] = `
+
+index.ts bundle [apis...]
+
+Bundle a multi-file API description to a single file.
+
+Positionals:
+  apis                                                     [array] [default: []]
+
+Options:
+      --version                   Show version number.                 [boolean]
+      --help                      Show help.                           [boolean]
+  -o, --output                    Output file or folder for inline APIs.[string]
+      --ext                       Bundle file extension.
+                                                [choices: "json", "yaml", "yml"]
+      --skip-preprocessor         Ignore certain preprocessors.          [array]
+      --skip-decorator            Ignore certain decorators.             [array]
+  -d, --dereferenced              Produce a fully dereferenced bundle. [boolean]
+  -f, --force                     Produce bundle output even when errors occur.
+                                                                       [boolean]
+      --config                    Path to the config file.              [string]
+      --metafile                  Produce metadata about the bundle     [string]
+      --remove-unused-components  Remove unused components.
+                                                      [boolean] [default: false]
+  -k, --keep-url-references       Keep absolute url references.        [boolean]
+      --lint-config               Severity level for config file linting.
+                             [choices: "warn", "error", "off"] [default: "warn"]
+
+At least one inline API must be specified when using --output.
+
+`;

__tests__/bundle/bundle-no-output-without-inline-apis/test.yaml

@@ -0,0 +1,25 @@
+openapi: 3.1.0
+paths:
+  /test-api:
+    get:
+      responses:
+        '200':
+          description: success
+          content:
+            application/json:
+              schema:
+                $defs:
+                  main_data:
+                    $anchor: main_data
+                    type: object
+                    properties:
+                      foo:
+                        type: string
+                type: object
+                oneOf:
+                  - properties:
+                      wrapper:
+                        $ref: '#main_data'
+                  - $ref: '#main_data'
+              example:
+                foo: TEST

__tests__/commands.test.ts

@@ -451,6 +451,7 @@ describe('E2E', () => {
       'bundle-remove-unused-components',
       'bundle-remove-unused-components-from-config',
       'bundle-arazzo-valid-test-description',
+      'bundle-no-output-without-inline-apis',
     ];
     const folderPath = join(__dirname, 'bundle');
     const contents = readdirSync(folderPath).filter((folder) => !excludeFolders.includes(folder));
@@ -478,6 +479,13 @@ describe('E2E', () => {
       const result = getCommandOutput(args, testPath);
       (<any>expect(cleanupOutput(result))).toMatchSpecificSnapshot(join(testPath, 'snapshot.js'));
     });
+
+    test('bundle should NOT be invoked IF no positional apis provided AND --output specified', () => {
+      const testPath = join(folderPath, 'bundle-no-output-without-inline-apis');
+      const args = getParams('../../../packages/cli/src/index.ts', 'bundle', ['--output=dist']);
+      const result = getCommandOutput(args, testPath);
+      (<any>expect(cleanupOutput(result))).toMatchSpecificSnapshot(join(testPath, 'snapshot.js'));
+    });
   });
 
   describe('bundle with option: remove-unused-components', () => {

packages/cli/src/__tests__/commands/bundle.test.ts

@@ -209,7 +209,7 @@ describe('bundle', () => {
       expect(process.stdout.write).toHaveBeenCalledTimes(1);
     });
 
-    it('should NOT store bundled API descriptions in the output files described in the apis section of config IF no there is a positional api provided', async () => {
+    it('should NOT store bundled API descriptions in the output files described in the apis section of config IF there is a positional api provided', async () => {
       const apis = {
         foo: {
           root: 'foo.yaml',

packages/cli/src/index.ts

@@ -473,86 +473,94 @@ yargs
     'bundle [apis...]',
     'Bundle a multi-file API description to a single file.',
     (yargs) =>
-      yargs.positional('apis', { array: true, type: 'string', demandOption: true }).options({
-        output: {
-          type: 'string',
-          description: 'Output file.',
-          alias: 'o',
-        },
-        ext: {
-          description: 'Bundle file extension.',
-          requiresArg: true,
-          choices: outputExtensions,
-        },
-        'skip-preprocessor': {
-          description: 'Ignore certain preprocessors.',
-          array: true,
-          type: 'string',
-        },
-        'skip-decorator': {
-          description: 'Ignore certain decorators.',
-          array: true,
-          type: 'string',
-        },
-        dereferenced: {
-          alias: 'd',
-          type: 'boolean',
-          description: 'Produce a fully dereferenced bundle.',
-        },
-        force: {
-          alias: 'f',
-          type: 'boolean',
-          description: 'Produce bundle output even when errors occur.',
-        },
-        config: {
-          description: 'Path to the config file.',
-          type: 'string',
-        },
-        metafile: {
-          description: 'Produce metadata about the bundle',
-          type: 'string',
-        },
-        extends: {
-          description: 'Override extends configurations (defaults or config file settings).',
-          requiresArg: true,
-          array: true,
-          type: 'string',
-          hidden: true,
-        },
-        'remove-unused-components': {
-          description: 'Remove unused components.',
-          type: 'boolean',
-          default: false,
-        },
-        'keep-url-references': {
-          description: 'Keep absolute url references.',
-          type: 'boolean',
-          alias: 'k',
-        },
-        'lint-config': {
-          description: 'Severity level for config file linting.',
-          choices: ['warn', 'error', 'off'] as ReadonlyArray<RuleSeverity>,
-          default: 'warn' as RuleSeverity,
-        },
-        format: {
-          hidden: true,
-          deprecated: true,
-        },
-        lint: {
-          hidden: true,
-          deprecated: true,
-        },
-        'skip-rule': {
-          hidden: true,
-          deprecated: true,
-          array: true,
-          type: 'string',
-        },
-        'max-problems': {
-          hidden: true,
-          deprecated: true,
-        },
-      }),
+      yargs
+        .positional('apis', { array: true, type: 'string', demandOption: true })
+        .options({
+          output: {
+            type: 'string',
+            description: 'Output file or folder for inline APIs.',
+            alias: 'o',
+          },
+          ext: {
+            description: 'Bundle file extension.',
+            requiresArg: true,
+            choices: outputExtensions,
+          },
+          'skip-preprocessor': {
+            description: 'Ignore certain preprocessors.',
+            array: true,
+            type: 'string',
+          },
+          'skip-decorator': {
+            description: 'Ignore certain decorators.',
+            array: true,
+            type: 'string',
+          },
+          dereferenced: {
+            alias: 'd',
+            type: 'boolean',
+            description: 'Produce a fully dereferenced bundle.',
+          },
+          force: {
+            alias: 'f',
+            type: 'boolean',
+            description: 'Produce bundle output even when errors occur.',
+          },
+          config: {
+            description: 'Path to the config file.',
+            type: 'string',
+          },
+          metafile: {
+            description: 'Produce metadata about the bundle',
+            type: 'string',
+          },
+          extends: {
+            description: 'Override extends configurations (defaults or config file settings).',
+            requiresArg: true,
+            array: true,
+            type: 'string',
+            hidden: true,
+          },
+          'remove-unused-components': {
+            description: 'Remove unused components.',
+            type: 'boolean',
+            default: false,
+          },
+          'keep-url-references': {
+            description: 'Keep absolute url references.',
+            type: 'boolean',
+            alias: 'k',
+          },
+          'lint-config': {
+            description: 'Severity level for config file linting.',
+            choices: ['warn', 'error', 'off'] as ReadonlyArray<RuleSeverity>,
+            default: 'warn' as RuleSeverity,
+          },
+          format: {
+            hidden: true,
+            deprecated: true,
+          },
+          lint: {
+            hidden: true,
+            deprecated: true,
+          },
+          'skip-rule': {
+            hidden: true,
+            deprecated: true,
+            array: true,
+            type: 'string',
+          },
+          'max-problems': {
+            hidden: true,
+            deprecated: true,
+          },
+        })
+        .check((argv) => {
+          if (argv.output && (!argv.apis || argv.apis.length === 0)) {
+            throw new Error('At least one inline API must be specified when using --output.');
+          }
+          return true;
+        }),
     (argv) => {
       const DEPRECATED_OPTIONS = ['lint', 'format', 'skip-rule', 'max-problems'];
       const LINT_AND_BUNDLE_DOCUMENTATION_LINK =
@@ -778,7 +786,7 @@ yargs
         })
         .check((argv: any) => {
           if (argv.theme && !argv.theme?.openapi)
-            throw Error('Invalid option: theme.openapi not set');
+            throw Error('Invalid option: theme.openapi not set.');
           return true;
         }),
     async (argv) => {