CLI: Add prompt-only automigrate asking for react-removal

code/lib/cli/src/automigrate/fixes/prompt-remove-react.test.ts

@@ -0,0 +1,158 @@
+import type { StorybookConfig } from '@storybook/types';
+import { glob } from 'glob';
+import { removeReactDependency } from './prompt-remove-react';
+import type { JsPackageManager } from '../../js-package-manager';
+
+const check = async ({
+  packageManagerContent,
+  main: mainConfig,
+  storybookVersion = '8.0.0',
+}: {
+  packageManagerContent: Pick<
+    Partial<Awaited<ReturnType<JsPackageManager['retrievePackageJson']>>>,
+    'dependencies' | 'devDependencies' | 'peerDependencies'
+  >;
+  main: Partial<StorybookConfig> & Record<string, unknown>;
+  storybookVersion?: string;
+}) => {
+  const packageManager = {
+    retrievePackageJson: async () => packageManagerContent,
+  } as JsPackageManager;
+
+  return removeReactDependency.check({
+    packageManager,
+    configDir: '',
+    mainConfig: mainConfig as any,
+    storybookVersion,
+  });
+};
+
+jest.mock('glob', () => ({ glob: jest.fn(() => []) }));
+
+describe('early exits', () => {
+  test('cancel if storybookVersion < 8', async () => {
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: [],
+          framework: '@storybook/vue-vite',
+        },
+        storybookVersion: '7.0.0',
+      })
+    ).resolves.toBeFalsy();
+  });
+
+  test('cancel if no react deps', async () => {
+    await expect(
+      check({
+        packageManagerContent: {},
+        main: {
+          stories: [],
+          framework: '@storybook/vue-vite',
+        },
+      })
+    ).resolves.toBeFalsy();
+  });
+
+  test('cancel if react renderer', async () => {
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: [],
+          framework: '@storybook/react-vite',
+        },
+      })
+    ).resolves.toBeFalsy();
+
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: [],
+          framework: '@storybook/nextjs',
+        },
+      })
+    ).resolves.toBeFalsy();
+
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: [],
+          framework: { name: '@storybook/react-webpack5' },
+        },
+      })
+    ).resolves.toBeFalsy();
+  });
+});
+
+describe('prompts', () => {
+  test('simple', async () => {
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: ['*.stories.ts'],
+          addons: [],
+          framework: '@storybook/vue-vite',
+        },
+      })
+    ).resolves.toEqual(true);
+  });
+  test('detects addon docs', async () => {
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: ['*.stories.ts'],
+          addons: ['@storybook/addon-docs'],
+          framework: '@storybook/vue-vite',
+        },
+      })
+    ).resolves.toEqual(true);
+  });
+  test('detects addon essentials', async () => {
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: ['*.stories.ts'],
+          addons: ['@storybook/addon-docs', '@storybook/addon-essentials'],
+          framework: '@storybook/vue-vite',
+        },
+      })
+    ).resolves.toEqual(true);
+  });
+  test('detects MDX usage', async () => {
+    // @ts-expect-error (jest mocked)
+    glob.mockImplementationOnce(() => ['*.stories.mdx']);
+    await expect(
+      check({
+        packageManagerContent: {
+          dependencies: { react: '16.0.0' },
+        },
+        main: {
+          stories: ['*.stories.ts'],
+          addons: ['@storybook/addon-docs', '@storybook/addon-essentials'],
+          framework: '@storybook/vue-vite',
+        },
+      })
+    ).resolves.toEqual(true);
+  });
+});

code/lib/cli/src/automigrate/fixes/prompt-remove-react.ts

@@ -0,0 +1,46 @@
+import dedent from 'ts-dedent';
+import semver from 'semver';
+import { getFrameworkPackageName } from '../helpers/mainConfigFile';
+import type { Fix } from '../types';
+
+export const removeReactDependency: Fix<{}> = {
+  id: 'remove-react-dependency',
+
+  async check({ packageManager, mainConfig, storybookVersion }) {
+    // when the user is using the react renderer, we should not prompt them to remove react
+    const frameworkPackageName = getFrameworkPackageName(mainConfig);
+    if (frameworkPackageName?.includes('react') || frameworkPackageName?.includes('nextjs')) {
+      return null;
+    }
+
+    // if the user has no dependency on react, we can skip this fix
+    const packageJson = await packageManager.retrievePackageJson();
+    if (
+      !packageJson?.dependencies?.['react'] &&
+      !packageJson?.peerDependencies?.['react'] &&
+      !packageJson?.devDependencies?.['react']
+    ) {
+      return null;
+    }
+
+    // do not prompt to remove react for older versions of storybook
+    if (!semver.gte(storybookVersion, '8.0.0')) {
+      return null;
+    }
+
+    return true;
+  },
+  prompt() {
+    return dedent`
+      We detected that your project has a dependency for "react" that it might not need.
+      Nothing breaks by having it, you can safely ignore this message, if you wish.
+
+      Storybook asked you to add "react" as a direct dependency in the past.
+      However, since version 8.0, Storybook no longer requires you to provide "react" as a dependency.
+      Some community addons might still wrongfully list "react" and "react-dom" as required peer dependencies, but since Storybook 7.6 it should not be needed in the majority of cases.
+
+      If you know you are not using React outside of Storybook, it should be safe to remove the "react" and "react-dom" dependencies from your project's package.json.
+      Storybook cannot do this automatically as removing it might break your project, so it should be done manually with care.
+    `;
+  },
+};