feat: allow ignore option in no-uninstalled-addons

docs/rules/no-uninstalled-addons.md

@@ -8,11 +8,11 @@
 
 ## Rule Details
 
-This rule checks if all addons registered in `.storybook/main.js` are properly listed in the root package.json of your project.
+This rule checks if all addons registered in `.storybook/main.js` are properly listed in the root `package.json` of your project.
 
-For instance, if the `@storybook/addon-links` is in the `.storybook/main.js` but is not listed in the `package.json` of the project, this rule will notify the user to add the addon to the package.json and install it.
+For instance, if the `@storybook/addon-links` is in the `.storybook/main.js` but is not listed in the `package.json` of the project, this rule will notify the user to add the addon to the `package.json` and install it.
 
-As an important side note, this rule will check for the `package.json` in the **root level** of your project. You can customize the location of the `package.json` by [setting the `packageJsonPath` option](#configure).
+As an important side note, this rule will check for the `package.json` in the **root level** of your project. You can customize the location of the `package.json` by [setting the `packageJsonLocation` option](#configure).
 
 Another very important side note: your ESLint config must allow the linting of the `.storybook` folder. By default, ESLint ignores all dot-files so this folder will be ignored. In order to allow this rule to lint the `.storybook/main.js` file, it's important to configure ESLint to lint this file. This can be achieved by writing something like:
 
@@ -68,7 +68,9 @@ module.exports = {
 
 ### Configure
 
-This rule assumes that the `package.json` is located in the root of your project. You can customize this by setting the `packageJsonPath` option of the rule:
+#### `packageJsonLocation`
+
+This rule assumes that the `package.json` is located in the root of your project. You can customize this by setting the `packageJsonLocation` option of the rule:
 
 ```js
 module.exports = {
@@ -80,6 +82,21 @@ module.exports = {
 
 Note that the path must be relative to where ESLint runs from, which is usually relative to the root of the project.
 
+#### `ignore`
+
+You can also ignore certain addons by providing an ignore array in the options:
+
+```js
+module.exports = {
+  rules: {
+    'storybook/no-uninstalled-addons': [
+      'error',
+      { packageJsonLocation: './folder/package.json', ignore: ['custom-addon'] },
+    ],
+  },
+}
+```
+
 ### What if I use a different storybook config directory?
 
 Some Storybook folders use a different name for their config directory other than `.storybook`. This rule will not be applied there by default. If you have a custom location for your storybook config directory, then you must add an override in your `.eslintrc.js` file, defining your config directory:
@@ -103,4 +120,4 @@ This rule is very handy to be used because if the user tries to start storybook
 
 ## Further Reading
 
-Check the issue in GitHub: https://github.com/storybookjs/eslint-plugin-storybook/issues/95
+Check the issue in GitHub: [https://github.com/storybookjs/eslint-plugin-storybook/issues/95](https://github.com/storybookjs/eslint-plugin-storybook/issues/95)

lib/rules/no-uninstalled-addons.ts

@@ -26,7 +26,12 @@ import { TSESTree } from '@typescript-eslint/utils'
 
 export = createStorybookRule({
   name: 'no-uninstalled-addons',
-  defaultOptions: [],
+  defaultOptions: [
+    {
+      packageJsonLocation: '' as string,
+      ignore: [] as string[],
+    },
+  ],
   meta: {
     type: 'problem',
     docs: {
@@ -46,16 +51,31 @@ export = createStorybookRule({
           packageJsonLocation: {
             type: 'string',
           },
+          ignore: {
+            type: 'array',
+            items: {
+              type: 'string',
+            },
+          },
         },
       },
-    ], // Add a schema if the rule has options. Otherwise remove this
+    ],
   },
 
   create(context) {
     // variables should be defined here
-    const packageJsonLocation = context.options.reduce((acc, val) => {
-      return val['packageJsonLocation'] || acc
-    }, '')
+    const { packageJsonLocation, ignore } = context.options.reduce<{
+      packageJsonLocation: string
+      ignore: string[]
+    }>(
+      (acc, val) => {
+        return {
+          packageJsonLocation: val['packageJsonLocation'] || acc.packageJsonLocation,
+          ignore: val['ignore'] || acc.ignore,
+        }
+      },
+      { packageJsonLocation: '', ignore: [] }
+    )
 
     //----------------------------------------------------------------------
     // Helpers
@@ -103,7 +123,7 @@ export = createStorybookRule({
       const result = addons
         // remove local addons (e.g. ./my-addon/register.js)
         .filter(filterLocalAddons)
-        .filter((addon) => !isAddonInstalled(addon, installedSbAddons))
+        .filter((addon) => !isAddonInstalled(addon, installedSbAddons) && !ignore.includes(addon))
         .map((addon) => ({ name: addon }))
       return result.length ? result : false
     }

tests/lib/rules/no-uninstalled-addons.test.ts

@@ -11,7 +11,7 @@ import { AST_NODE_TYPES } from '@typescript-eslint/utils'
 
 import rule from '../../../lib/rules/no-uninstalled-addons'
 import ruleTester from '../../utils/rule-tester'
-import { sep } from 'path';
+import { sep } from 'path'
 
 jest.mock('fs', () => ({
   ...jest.requireActual('fs'),
@@ -118,6 +118,24 @@ ruleTester.run('no-uninstalled-addons', rule, {
         ]
       }
   `,
+    {
+      code: `
+      module.exports = {
+          addons: [
+            "@storybook/addon-links",
+            "@storybook/addon-essentials",
+            "@storybook/addon-interactions",
+            "@storybook/not-installed-addon"
+          ]
+        }
+    `,
+      options: [
+        {
+          packageJsonLocation: '',
+          ignore: ['@storybook/addon-not-installed-addon'],
+        },
+      ],
+    },
   ],
   invalid: [
     {